CN101730137B - Data processing method and system - Google Patents

Abstract

The invention discloses a data processing method.A UE starts a receiving end RTT timer when receiving a message indicating the arrival of new downlink data; starting a receiving end retransmission timer after the RTT timer of the receiving end is overtime; and after the retransmission timer of the receiving end is overtime, if the decoding of the downlink data fails, starting an RTT timer of the receiving end. The embodiment of the invention also discloses a data processing system. According to the embodiment of the invention, the starting and stopping conditions are set for each timer, so that the problem of data transmission failure caused by PDCCH message loss can be solved, and the transmission performance is improved.

Description

Data processing method and system

technical field

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

Background technique

In a Long Term Evolution (LTE, Long Term Evolution) system, a user equipment (User Equipment, UE) may adopt a discontinuous reception (Discontinuous reception, DRX) mechanism to achieve the purpose of power saving. According to the DRX mechanism, the UE does not receive data within a preset period of time, such as turning off the receiver to sleep, and the UE "wakes up" after the preset period of time 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 active period (onduration) and a sleep period (sleep). the

If the UE receives a PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) message used to instruct the base station to send downlink data during the active period, the UE starts the receiving end round-trip time timer (RTT timer, HARQ RTT Timer). During the running of the RTT (Round-Trip Time) timer at the receiving end, the UE is in a sleep state. When the UE successfully receives the downlink data, the UE will stop the RTT timer at the receiving end and send an acknowledgment message ACK to the base station; when the UE fails to receive the downlink data, the RTT timer at the receiving end will continue to count until it times out; the UE starts the receiving end Retransmission timer (DRX Retransmission Timer). During the running period of the retransmission timer at the receiving end, the UE is in an active state, and searches for and receives the PDCCH message used to indicate the retransmission of the above-mentioned downlink data. After receiving the PDCCH message indicating the arrival of downlink retransmission data, the UE stops the retransmission timer at the receiving end and starts the RTT timer at the receiving end.

After the base station sends the PDCCH message for instructing to send downlink data, it will start the RTT timer at the sending end. If the base station does not receive an acknowledgment message from the UE during the running of the RTT timer at the sending end, the base station starts the retransmission timer at the sending end after the RTT timer at the sending end expires, and Sending the retransmission data and the PDCCH message used to indicate the arrival of the downlink retransmission data to the UE. After sending the PDCCH message for indicating the arrival of downlink retransmission data, the base station starts the RTT timer of the sending end. the

In the process of implementing the present invention, the inventor found the following problem in the prior art: after the base station sends a PDCCH message indicating the arrival of downlink retransmission data, it will consider that the terminal enters a sleep state after receiving the PDCCH message. If the PDCCH message is lost, the retransmission timer of the UE at the receiving end is still running, but the RTT timer at the receiving end is not started, that is, the UE is in an active state and does not enter a sleep state. In this way, the DRX states on both sides of the base station and the terminal are out of synchronization. The base station may send a PDCCH message to a UE in a sleep state, causing the UE to miss the PDCCH message sent by the base station, thereby missing downlink reception or uplink transmission, resulting in reduced transmission performance. the

Contents 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 degraded due to the loss of the PDCCH message used to indicate the arrival of downlink retransmission data. the

An embodiment of the present invention provides a data processing method. The method includes: when the user equipment UE receives a message indicating the arrival of new downlink data, start the RTT timer at the receiving end; when the base station sends the new downlink data, start sending end RTT timer; the UE starts the receiving end retransmission timer after the receiving end RTT timer expires; the base station starts the sending end retransmission timer after the sending end RTT timer expires; the UE starts the receiving end retransmission timer After the retransmission timer expires, if the decoding of the downlink data fails, the RTT timer at the receiving end is started; the base station starts the RTT timer at the sending end after the retransmission timer at the sending end expires. the

The embodiment of the present invention also provides a data processing method, the method includes: when the user equipment UE receives a message indicating the arrival of new downlink data, start the RTT timer at the receiving end, and after the RTT timer at the receiving end expires, , start the retransmission timer at the receiving end; when the base station sends the new downlink data, start the RTT timer at the sending end, and start the retransmission timer at the sending end after the RTT timer at the sending end expires; the UE retransmits at the receiving end After the transmission timer expires, start the monitoring timer, and stop the monitoring timer after successfully decoding the downlink data; 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; After sending the retransmission data of the downlink data, the base station stops the retransmission timer of the sending end and starts the RTT timer of the sending end. the

The embodiment of the present invention also provides a data processing system, the system includes: user equipment UE, configured to start the RTT timer at the receiving end when receiving a message indicating the arrival of new downlink data; after the RTT timer at the receiving end expires , start the retransmission timer at the receiving end; and after the retransmission timer at the receiving end expires, if the downlink data decoding fails, start the RTT timer at the receiving end; and, the base station is used to start when sending the new downlink data The RTT timer at the sending end; start the retransmission timer at the sending end after the RTT timer at the sending end expires; and start the RTT timer at the sending end after the retransmission timer at the sending end expires. the

The embodiment of the present invention also provides a data processing system, the system includes: user equipment UE, configured to start the RTT timer at the receiving end when receiving a message indicating the arrival of new downlink data, and set the RTT timer at the receiving end After the receiver times out, start the retransmission timer at the receiving end; and after the retransmission timer at the receiving end times out, start the monitoring timer, and stop the monitoring timer after successfully decoding the downlink data; the base station is used to send the new When receiving downlink data, start the sender RTT timer, start the sender retransmission timer after the sender RTT timer expires; and after sending the retransmission data of the downlink data, stop the sender retransmission timer, and start sending Terminal RTT timer. the

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. the

Description of drawings

Fig. 1 is a flow chart of a data processing method provided by Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a data processing method provided by Embodiment 2 of the present invention. the

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. the

As shown in Figure 1, a schematic flow diagram of a data processing method is provided for Embodiment 1 of the present invention, the method includes the following steps:

S101. When the UE receives the PDCCH message indicating the arrival of new downlink data, it starts the receiving end RTT timer;

Correspondingly, the above-mentioned base station starts the RTT timer at the sending end when sending new downlink data; it should be noted that if the retransmission timer at the sending end of the base station is running at this time, the base station stops the retransmission timer at the sending end;

Wherein, the duration of the RTT timer at the receiving end is equal to the duration of the RTT timer at the transmitting end of the base station. the

S102. After the RTT timer at the receiving end expires, the UE starts the retransmission timer at the receiving end;

Correspondingly, the above-mentioned base station starts the retransmission timer of the sending end after the RTT timer of the sending end expires;

Among them, the duration of the retransmission timer at the receiving end is equal to the duration of the retransmission timer at the transmitting end of the base station;

It should be pointed out that in this step, the UE starts the receiving end retransmission timer after the receiving end RTT timer expires, which means that the UE takes the receiving end RTT timer timeout as the trigger condition for starting the receiving end retransmission timer; The downlink data sent by the base station along with the PDCCH message or the failure to decode the downlink data will cause the RTT timer at the receiving end of the UE to time out. the

S103. After the retransmission timer at the receiving end expires, if the UE fails to decode the downlink data, start the RTT timer at the receiving end;

Correspondingly, the above-mentioned base station starts the RTT timer of the sending end after the retransmission timer of the sending end expires. the

In this embodiment, the UE will execute S102 and S103 cyclically until the UE decodes the downlink data successfully. If the UE receives the next PDCCH message indicating the arrival of new downlink data before the downlink data is successfully decoded, the UE jumps to S101. the

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. the

As shown in Figure 2, a schematic flow diagram of a data processing method is provided for Embodiment 2 of the present invention, the method includes the following steps:

S201. When the UE receives a PDCCH message indicating the arrival of new downlink data, start the receiving end RTT timer; after the receiving end RTT timer expires, start the receiving end retransmission timer;

Correspondingly, the base station starts the RTT timer at the sending end when sending the downlink data, and starts the retransmission timer at the sending end after the RTT timer at the sending end expires. the

Wherein, the duration of the RTT timer at the receiving end is equal to the duration of the RTT timer at the transmitting end of the base station.

S202. After the retransmission timer at the receiving end expires, the UE starts the monitoring timer; the duration of the monitoring timer is the sum of the retransmission timer at the receiving end and the RTT timer at the receiving end;

Correspondingly, after the above-mentioned base station sends the retransmission data of the downlink data, the retransmission timer of the sending end is stopped, and the RTT timer of the sending end is started. the

S203. After the UE successfully decodes the downlink data, stop the monitoring timer. the

In this embodiment, by increasing the monitoring timer on the UE side, 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 transmission performance. the

In Embodiment 3 of the present invention, there is downlink data waiting to be sent to the UE on the network side. The data processing process of the present embodiment comprises the following steps:

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

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

Specifically, it is assumed that the base station sends a PDCCH message and downlink data to the active UE at time T31, and the UE receives the PDCCH message and downlink data at time T31, so that the RTT timers of the base station and the UE start at the same time. the

S302. The UE fails to decode the received downlink data, and sends a non-acknowledgment message NACK to the base station; the base station receives the NACK, and starts a retransmission timer at the sending end after the RTT timer at the sending end expires. the

Specifically, the UE sends a NACK at a certain time, assuming time T32; the base station receives the NACK at time T32, and waits for the RTT timer at the sending end to expire. Assuming that the RTT timer at the sending end expires at time T33, the base station starts the retransmission timer at the sending end at time T33.

In this embodiment, the RTT timer at the receiving end and the RTT timer at the transmitting end can be preset to the same duration, and the RTT timer at the receiving end also times out at time T33. At this time, the UE starts the retransmission timer at the receiving end, so that The retransmission timers of the base station and the UE start at the same time. the

S303. The base station sends a PDCCH message indicating the arrival of the retransmission data and the retransmission data of the downlink data to the UE. the

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

Specifically, at a certain moment during the running of the retransmission timer at the sending end, such as time T33, the base station sends a PDCCH message for indicating the arrival of the downlink retransmission data and the retransmission data of the downlink data to the UE. the

In this embodiment, if the PDCCH message is lost, the UE will not receive the PDCCH message, and will not know that data will arrive, and therefore will not receive retransmitted data. the

S304. After the retransmission timer of the base station at the sending end expires, the base station starts the RTT timer at the sending end. the

Wherein, it is assumed that the retransmission timer of the receiving end expires at time T34. the

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

In this embodiment, the retransmission timer at the receiving end and the retransmission timer at the sending end can be preset to the same duration, and the retransmission timer at the receiving end also times out at time T34. At this time, the UE starts the RTT timer at the receiving end, Therefore, the RTT timers of the base station and the UE are started at the same time. the

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

Specifically, the base station starts the retransmission timer of the sending end after the RTT timer of the sending end expires, and sends the PDCCH message indicating the downlink retransmission data and the retransmission data of the downlink data to the UE during the running period of the retransmission timer of the sending end . the

S306. The UE receives the PDCCH message and the retransmitted data, and after successful decoding, sends an acknowledgment message ACK to the base station. the

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

In Embodiment 4 of the present invention, the UE sets a monitoring timer PDCCH Lost Timer. The process of this embodiment is as follows:

S401-402 are similar to S301-302 and will not be repeated here. the

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

Wherein, the PDCCH message is used to indicate the arrival of downlink retransmission data;

Specifically, in this step, the base station does not need to wait for the retransmission timer of the sending end to expire, but stops the retransmission timer of the sending end after sending the PDCCH message and the retransmission data of the downlink data; and the UE does not receive the PDCCH message and If the data is retransmitted, the UE starts the monitoring timer after the retransmission timer at the receiving end expires. the

In this step, the duration of the monitoring timer is set to 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

S404. After the RTT timer of the base station at the sending end expires, the base station starts the retransmission timer at the sending end; after sending the PDCCH message and downlink retransmission data to the UE, stops the retransmission timer at the sending end and starts the RTT timer at the sending end. the

Among them, if the base station does not receive the feedback from the UE within the preset period of time, the base station will start the retransmission timer of the sending end after the RTT timer of the sending end expires; the base station will send the retransmission timer for the The PDCCH message indicating the arrival of the downlink retransmission data and the retransmission data of the downlink data. the

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

In this embodiment, when the UE does not receive the PDCCH message indicating retransmission, the UE starts the monitoring timer, so that the UE is in the active state when the base station sends the next PDCCH message, and avoids the UE being in sleep when the base station sends the PDCCH message. state and miss the PDCCH message and retransmit data, thereby solving the problem of data transmission failure caused by PDCCH message loss and improving transmission performance. the

It should be noted that the data processing methods provided by the embodiments of the present invention are not only applicable to the LTE system, but also applicable to other communication systems with discontinuous reception modes. the

A system provided in Embodiment 5 of the present invention, the system includes user equipment UE and a base station, wherein:

The above-mentioned UE is configured to start the receiving end RTT timer when receiving a message indicating the arrival of new downlink data; after the receiving end RTT timer expires, start the receiving end retransmission timer; and the receiving end retransmission timer After a timeout, if the downlink data decoding fails, start the RTT timer at the receiving end; and,

The above-mentioned base station is used to start the RTT timer of the sending end when sending the new downlink data; start the retransmission timer of the sending end after the RTT timer of the sending end expires; and start the retransmission timer of the sending end after the retransmission timer of the sending end expires RTT timer. the

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

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

A system provided in Embodiment 6 of the present invention, the system includes user equipment UE and a base station, wherein:

The above-mentioned UE is configured to start the RTT timer at the receiving end when receiving the message indicating the arrival of new downlink data, and start the retransmission timer at the receiving end after the RTT timer at the receiving end expires; and retransmit the timer at the receiving end After the transmission timer expires, start the monitoring timer, and stop the monitoring timer after successfully decoding the downlink data; where, 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 above-mentioned base station is used to start the RTT timer at the sending end when sending the new downlink data, and start the retransmission timer at the sending end after the RTT timer at the sending end expires; and after sending the retransmission data of the downlink data, stop The sender retransmits the timer and starts the sender RTT timer. the

In this embodiment, the duration of the RTT timer at the receiving end is equal to the duration of the RTT timer at the transmitting end of the base station, and the duration of the retransmission timer at the receiving end is equal to the duration of the retransmission timer at the transmitting end of the base station. the

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

The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as protection scope of the present invention.

Claims (8)

1. a data processing method is characterized in that, this method comprises:

User equipment (UE) starts receiving terminal RTT two-way time timer when receiving the message of the new downlink data arrival of indication;

The base station starts transmitting terminal RTT timer when sending said new downlink data;

Said UE starts the receiving terminal retransmission timer behind receiving terminal RTT timer expiry;

Said base station starts the transmitting terminal retransmission timer behind transmitting terminal RTT timer expiry;

Said UE is after the receiving terminal retransmission timer is overtime, if downlink data decoding failure then starts receiving terminal RTT timer;

Said base station starts transmitting terminal RTT timer in the overtime back of transmitting terminal retransmission timer.

2. method according to claim 1 is characterized in that, this method also comprises:

Receiving terminal RTT length of timer equates with transmitter end of base station RTT length of timer; And

The duration of receiving terminal retransmission timer equates with the duration of transmitter end of base station retransmission timer.

3. according to claim 1 or 3 described methods, it is characterized in that this method also comprises:

Before said UE decoded successfully to said downlink data, when receiving the message of the new downlink data of next indication, said UE started receiving terminal RTT timer.

4. a data processing method is characterized in that, this method comprises:

User equipment (UE) starts receiving terminal RTT timer, and behind receiving terminal RTT timer expiry, starts the receiving terminal retransmission timer receiving when being used to indicate the message that new downlink data arrives;

The base station starts transmitting terminal RTT timer when sending said new downlink data, behind transmitting terminal RTT timer expiry, start the transmitting terminal retransmission timer;

Said UE starts supervision timer after the receiving terminal retransmission timer is overtime, and after the success of decoding downlink data, stops supervision timer;

The duration of supervision timer is the duration and the receiving terminal RTT length of timer sum of receiving terminal retransmission timer;

Said base station stops the transmitting terminal retransmission timer behind the data retransmission that sends downlink data, and starts transmitting terminal RTT timer.

5. method according to claim 4 is characterized in that, this method also comprises:

Receiving terminal RTT length of timer equates with transmitter end of base station RTT length of timer; And

The duration of receiving terminal retransmission timer equates with the duration of transmitter end of base station retransmission timer.

6. a data handling system is characterized in that, this system comprises:

User equipment (UE) is used for when receiving the message of the new downlink data arrival of indication, starting receiving terminal RTT timer; Behind receiving terminal RTT timer expiry, start the receiving terminal retransmission timer; And after the receiving terminal retransmission timer is overtime, if downlink data decoding failure then starts receiving terminal RTT timer; And,

The base station is used for when sending said new downlink data, starting transmitting terminal RTT timer; Behind transmitting terminal RTT timer expiry, start the transmitting terminal retransmission timer; And at the overtime back startup of transmitting terminal retransmission timer transmitting terminal RTT timer.

7. a data handling system is characterized in that, this system comprises:

User equipment (UE) is used for starting receiving terminal RTT timer, and behind receiving terminal RTT timer expiry, starting the receiving terminal retransmission timer receiving when being used to indicate the message that new downlink data arrives; And after the receiving terminal retransmission timer is overtime, start supervision timer, and after the success of decoding downlink data, stop supervision timer;

The base station is used for when sending said new downlink data, starting transmitting terminal RTT timer, behind transmitting terminal RTT timer expiry, starts the transmitting terminal retransmission timer; And behind the data retransmission that sends downlink data, stop the transmitting terminal retransmission timer, and start transmitting terminal RTT timer.

8. system according to claim 7 is characterized in that, the duration of said supervision timer is the duration and the receiving terminal RTT length of timer sum of receiving terminal retransmission timer.

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