WO2013023484A1

WO2013023484A1 - Method and system for implementing drx

Info

Publication number: WO2013023484A1
Application number: PCT/CN2012/077171
Authority: WO
Inventors: 毛磊; 戴谦; 邓云
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-12
Filing date: 2012-06-19
Publication date: 2013-02-21
Also published as: CN102932884B; CN102932884A

Abstract

Disclosed are a method and a system for implementing DRX, so that a UE can enter a special DRX state according to received DRX control signaling. By implementing the DRX technology of the present invention, it is ensured that a status of the UE can optimally match a sending characteristic of service data, thereby reaching optimal power-saving performance.

Description

Method and system for implementing DRX

The present invention relates to communication or, in particular, to a method and system for implementing DRX (Discontinuous Reception). Background technique

The role of the DRX mechanism is simply that the user equipment (UE) stops listening to the physical downlink control channel (PDCCH) for a period of time, which saves power.

There are two types of DRX: One of them DRX is idle (IDLE) DRX. At this point, there is no Radio Resource Control (RRC) connection and the user's proprietary resources. If the UE wants to listen to the user data channel, it must first enter the connection state from the IDLE state.

The other DRX is a non-idle (ACTIVE) DRX, that is, the DRX in which the UE is in an RRC-CONNECTED state. ACTIVE DRX optimizes system resource configuration and, more importantly, saves UE power.

In fact, the connected UE still requires paging (Paging) to learn the information modified by the system message, so for a connected UE, two DRX processes may be maintained. The general system coordinates the configuration of the Paging period and the DRX period, so that the UE listens to the paging channel during the On Duration period to prevent the UE from waking up from the sleep state to read the Paging.

With the wide application of intelligent UEs and the rich application of services, in the case of more complex service characteristics, it is necessary to introduce a longer DRX cycle to make the UE more power efficient. If the longDRXcycle (long DRX cycle) is set to be large relative to the Paging period (such as tens of seconds;), it is more difficult to coordinate the configuration of the longDRXcycle and Paging cycles, and thus the UE will have a sleep period under DRX control. Paging occurs, so the UE needs to wake up during sleep. In order to read the paging, the paging message does not include downlink signals or data other than paging signaling for the UE, which is disadvantageous for the UE to save power. Summary of the invention

In view of this, the main object of the present invention is to provide a method and system for implementing DRX to ensure that the state of the UE can best match the transmission characteristics of the service data to achieve optimal power saving performance.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for implementing discontinuous reception of DRX, the method comprising:

The user equipment UE enters a special DRX state according to the received DRX control signaling.

The new DRX control signaling includes a new media access control control element MAC

Control element, at least one of RRC signaling and physical layer control signaling; the special DRX state is: a DRX state determined by a specific parameter including a DRX cycle Cycle being an infinity infinity;

The manner of notifying the special DRX state includes: the UE is indicated by the index index to indicate one of a plurality of preset states; or, the UE is directly configured with a specific DRX configuration parameter as the notification.

Among them, whether special DRX control needs to be performed is determined by one of the following methods before the notification is made:

The network side decides to perform special DRX control according to the transmission characteristics of the downlink data; or, the UE actively initiates a DRX status update request according to the transmission characteristics of the uplink data; or, the network side comprehensively determines the transmission characteristics of the uplink and downlink data to perform special DRX control and specific control methods.

The method further includes: when the UE is in a special DRX controlled sleep sleep, if there is uplink data to be sent, the UE initiates a random access procedure, and automatically exits the special

DRX control process; Alternatively, if there is downlink data to be sent, the UE wakes up after receiving the paging on the network side, initiates a random access procedure, and automatically exits the special DRX control process.

The method further includes:

When the UE exits the special DRX control process, it reverts to the previous DRX control process, or is reconfigured by the network side to the DRX cycle.

A system for implementing a DRX, the system includes a new DRX control signaling processing unit, and a DRX state triggering unit;

The new DRX control signaling processing unit is configured to introduce new DRX control signaling, and the DRX state triggering unit is configured to notify the UE according to the new DRX control signaling introduced by the new DRX control signaling processing unit. Enter a special DRX state.

The new DRX control signaling includes at least one of a new MAC Control Element, RRC signaling, and physical layer control signaling;

The special DRX state is: a DRX state determined by a specific parameter including a DRX Cycle for infinity;

When notifying the special DRX state, the DRX state triggering unit is configured to: indicate one of a plurality of predetermined states by using an index; or directly configure a specific DRX configuration parameter as the notification.

The new DRX control signaling processing unit is further configured to determine that special DRX control is required:

The triggering network determines that special DRX control is required, including: triggering the base station to perform special DRX control according to the sending characteristics of the downlink data, and send the DRX control signaling to the UE;

Or, triggering the UE to perform special DRX control by using an active trigger, including: triggering the UE to perform special DRX control according to the sending characteristics of the uplink data, and actively initiate a DRX status update request, and the network side agrees to send the DRX control signaling. Give the UE;

Or, combining the transmission characteristics of the uplink and downlink data, triggering the network side to finally determine whether to perform special The special DRX control and the specific control mode, and send DRX control signaling to the UE.

Wherein, when the UE is in a special DRX controlled sleep sleep,

If there is uplink data to be sent, the UE is further configured to: initiate a random access procedure, and automatically exit the special DRX control process;

If there is downlink data to be sent, the UE is further configured to: wake up by the network side by paging paging, initiate a random access procedure, and automatically exit the special DRX control process.

The UE is further configured to: when exiting the special DRX control process, roll back to the previous

The DRX control process, or the DRX cycle is reconfigured by the network side.

The DRX technology of the present invention can ensure that the state of the UE can best match the transmission characteristics of the service data and achieve the best power saving performance. DRAWINGS

FIG. 1 is a schematic flowchart of implementing DRX according to an embodiment of the present invention;

FIG. 2 is a system diagram of implementing DRX according to an embodiment of the present invention. detailed description

In actual application, new DRX control signaling can be introduced, and the UE can be quickly notified to enter a special DRX state through the DRX control signaling. Based on this, the UE can determine the optimal DRX cycle parameters based on the real-time data transmission characteristics, and can complete the configuration process through the new DRX control signaling in time, for example, updating the timer set by the UE according to the newly configured parameters. Value, to reduce the probability that the UE wakes up unnecessarily, to achieve better power saving effect.

Specifically, the new DRX control signaling includes at least one of a new MAC Control Element, RRC signaling, physical layer control signaling, and the like; the special DRX state is Refers to the DRX state determined by a specific parameter, such as the DRX cycle (infinity); the way to indicate the special DRX state is: by index (index) to indicate one of several predetermined states One. Of course, you can Configure specific DRX configuration parameters directly.

Further, the network side may determine that special DRX control needs to be performed. For example, the evolved base station (eNB) decides to perform special DRX control according to the transmission characteristics of the downlink data, and sends DRX control signaling to the UE.

Certainly, the UE may also perform special DRX control by using an active trigger. For example, the UE requires the network side to perform special DRX control according to the transmission characteristics of the uplink data, and actively initiates a DRX status update request, and the network side agrees to send the DRX control signaling. Give the UE.

In practical applications, the transmission characteristics of the uplink and downlink data may be integrated, and the network side finally determines whether to perform special DRX control and a specific control mode, and sends DRX control signaling to the UE.

When the UE is in the sleep period of the special DRX control, if there is uplink data to be sent, the UE may initiate a random access procedure, and automatically exit the special DRX control process, roll back to the previous DRX control process, or be reconfigured by the network side. DRX cycle; If there is downlink data to be sent, the network side wakes up the UE through paging, the UE initiates a random access procedure, and automatically exits the special DRX control process, and rolls back to the previous DRX control process, or reconfigures the DRX cycle by the network side. .

The invention will now be described in connection with the embodiments and the accompanying drawings.

Embodiment 1: The following line data characteristics are judged based on whether to judge whether to perform special DRX control; the DRX command is triggered by the network side.

The UE1 in the RRC connected state is performing service transmission, and the eNB or the base station (Node B), the radio network side controller (RNC), and other forms of network side controllers, etc., configure the DRX configuration parameter for the UE1 according to the current service characteristics. :

onDurationTimer (active period timer); sf8 (8 subframes containing PDCCH); drx-InactivityTimer (DRX deactivation timer); sf4 (4 subframes containing PDCCH); drx-RetransmissionTimer (DRX retransmission timer); sf8 (8 subframes containing PDCCH);

longDRX-CycleStartOffset (long DRX cycle start offset); sf640 (640 sub-frames), INTEGER (integer) (0..639);

shortDRX-Cycle (short DRX cycle); sf32 (32 subframes);

drxShortCycleTimer (short DRX cycle count;), INTEGER (4).

During the DRX configuration parameter control process, the eNB finds that the data transmission characteristics change. For example, no downlink data is to be sent within the next 2 minutes. The eNB determines to perform special DRX control on the UE1, and requires the UE to immediately enter a long-term sleep state. You do not need to wake up according to the configured DRX configuration parameters to achieve further power saving.

The eNB configures and sends the DRX control signaling to the UE1. The eNB can configure the DRX configuration parameters. For example, the longDRX-CycleStartOffset can be configured to a particularly large value, such as sf2560, or even infinity.

In addition, several sets of special DRX configurations can be predefined. Each DRX configuration is also composed of the above parameters, and the values are suitable for different service features. The eNB directly informs the UE1 to use the first set of special DRX configurations through the configured DRX control signaling, and after receiving the UE1, the UE1 learns the parameters to be used according to the predefined parameter configuration.

The eNB may transmit DRX control signaling by using a new MAC Control Element, RRC signaling or physical layer control signaling;

After receiving the DRX control signaling sent by the eNB, the UE1 configures a DRX configuration parameter such as a new DRX periodic parameter according to the indication, and performs a DRX process according to the new DRX configuration parameter.

When UE1 is in sleep of special DRX control, if there is uplink data to be sent, UE1 may initiate a random access procedure and automatically exit the special DRX control procedure, fall back to the previous DRX control procedure, or reconfigure DRX by the eNB. If there is downlink data to be sent, the eNB wakes up UE1 through paging, UE1 initiates a random access procedure, and automatically exits the special The special DRX control process, back to the previous DRX control process, or the eNB reconfigures the DRX cycle.

Embodiment 2: The data of the above line is judged according to the judgment, the UE determines whether to update the DRX configuration parameter; and informs the current data transmission characteristics of the network; finally, the network side makes a decision to confirm whether the DRX command is triggered and the specific DRX configuration parameter is determined.

The UE2 in the RRC connected state is performing service transmission, and the eNB or the Node B, the RNC, and other forms of the network side controllers, and the DRX configuration parameters configured for the UE1 according to the current service characteristics are:

onDurationTimer; psf8 (8 subframes containing PDCCH;);

drx-InactivityTimer; psf4 (4 subframes containing PDCCH);

drx-RetransmissionTimer; psf8 (8 subframes containing PDCCH);

longDRX-CycleStartOffset; sf640 (640 sub-frames), INTEGER (0..639); shortDRX-Cycle; sf32 (32 sub-frames);

drxShortCycleTimer, INTEGER (4).

During the DRX configuration parameter control process, UE2 finds that the uplink data transmission characteristics change, for example, no uplink data is to be sent within the next 2 minutes;

The UE's UE2 actively initiates a DRX status update request to the eNB, which indicates the transmission interval of the uplink data. The DRX status update request may be transmitted through a MAC Control Element, RRC signaling, or physical layer control signaling.

After receiving the DRX status update request sent by the UE2, the eNB decides whether to perform special DRX control on the UE2 according to the configured uplink data transmission interval and in combination with the current downlink data transmission feature.

The specific decision process may be: if the UE2 is running the pure uplink service, the eNB may determine the DRX configuration parameter used for performing the special DRX control according to the uplink data sending interval configured in the DRX state update request sent by the UE2; If UE2 is currently running bidirectional services, the eNB needs to determine the transmission characteristics of the downlink data of UE2, comprehensively consider the characteristics of uplink and downlink data transmission, and finally determine the DRX configuration parameters used for special DRX control. For example, the DRX configuration parameters are configured based on the data in the direction in which the data transmission interval is small.

The eNB configures and sends the DRX control signaling to the UE2. The eNB can configure the DRX configuration parameters. For example, the longDRX-CycleStartOffset can be configured to a particularly large value, such as sf2560, or even infinity.

The eNB may transmit DRX control signaling by using a new MAC Control Element, RRC signaling or a physical layer control signal;

After receiving the DRX control signaling sent by the eNB, the UE2 configures a DRX configuration parameter such as a new DRX periodic parameter according to the indication, and executes the DRX process according to the new DRX configuration parameter.

When UE2 is in sleep of special DRX control, if there is uplink data to be sent, UE2 may initiate a random access procedure and automatically exit the special DRX control procedure, fall back to the previous DRX control procedure, or reconfigure DRX by the eNB. If there is downlink data to be sent, the eNB wakes up UE2 by paging, UE2 initiates a random access procedure, and automatically exits the special DRX control process, and rolls back to the previous DRX control process, or the eNB reconfigures the DRX cycle.

As shown in the above embodiments, the DRX operation of the present invention may represent the process shown in FIG. 1, and the process includes the following steps:

Step 110: Introduce new DRX control signaling.

Step 120: Inform the UE to enter a special DRX according to the introduced new DRX control signaling. status.

In order to ensure that the above technical description and operation ideas can be smoothly implemented, the settings shown in Figure 2 can be performed. Referring to FIG. 2, FIG. 2 is a system diagram of implementing DRX according to an embodiment of the present invention, where the system includes a new DRX control signaling processing unit and a DRX state triggering unit.

In practical applications, the new DRX control signaling processing unit can introduce new DRX control signals. The DRX state triggering unit is configured to notify the UE to enter a special DRX state according to the new DRX control signaling introduced by the new DRX control signaling processing unit.

In summary, the DRX technology can ensure that the state of the UE can best match the transmission characteristics of the service data and achieve the best power saving performance, regardless of the method or the system.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

2. The method according to claim 1, wherein

The new DRX control signaling includes at least one of a new media access control control element MAC Control Element, radio resource control RRC signaling, and physical layer control signaling;

The special DRX state is: a DRX state determined by a specific parameter including a DRX cycle Cycle being an infinity infinity;

3. The method according to claim 1, wherein whether special DRX control is required is determined by one of the following methods before the notification is performed:

The method according to any one of claims 1 to 3, wherein the method further comprises: when the UE is in a special DRX controlled sleep sleep period,

If there is uplink data to be sent, the UE initiates a random access procedure and automatically exits the special DRX control process;

Alternatively, if there is downlink data to be sent, the UE wakes up after receiving the paging on the network side, initiates a random access procedure, and automatically exits the special DRX control process.

5. The method according to claim 4, wherein the method further comprises:

When the UE exits the special DRX control process, it reverts to the previous DRX control process, or The DRX cycle is reconfigured by the network side.

6. A system for implementing DRX, the system comprising a new DRX control signaling processing unit and a DRX state triggering unit; wherein

7. The system according to claim 6, wherein

8. The system according to claim 6, wherein the new DRX control signaling processing unit is further configured to determine that special DRX control is required:

The triggering network determines that special DRX control is required, including: triggering the base station to perform special DRX control according to the transmission characteristics of the downlink data, and sending the DRX control signaling to the UE; or triggering the UE to perform special DRX through active triggering. The control includes: triggering the UE to perform special DRX control according to the sending characteristics of the uplink data, and requesting the DRX status update request to be initiated, and the network side agrees to send the DRX control signaling to the UE;

Or, in combination with the transmission characteristics of the uplink and downlink data, the triggering network side finally determines whether to perform special DRX control and a specific control mode, and sends DRX control signaling to the UE.

9. The system according to any one of claims 6 to 8, wherein, when the UE is in a special DRX controlled sleep sleep, If there is uplink data to be sent, the UE is further configured to: initiate a random access procedure, and automatically exit the special DRX control process;

The system according to claim 9, wherein the UE is further configured to: when exiting the special DRX control process, roll back to the previous DRX control process, or reconfigure the DRX cycle by the network side.