WO2013023483A1

WO2013023483A1 - Method and system for implementing drx

Info

Publication number: WO2013023483A1
Application number: PCT/CN2012/077164
Authority: WO
Inventors: 毛磊; 戴谦; 邓云; 艾建勋
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: CN102932883A; CN102932883B

Abstract

Disclosed are a method and a system for implementing DRX. A UE can receive downlink data and/or downlink signaling transmitted in a paging sub-frame by a network side, the downlink data and/or downlink signaling being sent when the Paging sub-frame, monitored by the UE, is located in a sleep period of DRX control. The technology for implementing the DRX according to the present invention allows the network side to transmit the downlink data and/or signaling to the UE through the paging sub-frame during the DRX sleep period of the UE, so that the buffered downlink data and/or signaling can be transferred to the UE in time by taking the opportunity that the UE monitors that the paging sub-frame is awake, and the data can be sent to the UE in time without waiting for a next On Duration period. Therefore, the UE is more power-saving, the user experience can be improved, and a data amount buffered at the network side can be reduced.

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, it is a primary object of the present invention to provide a method and system for implementing DRX to make the UE more power efficient.

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:

Receiving, by the UE, downlink data and/or downlink signaling that is transmitted by the network side in the paging subframe, where the downlink data and/or downlink signaling is in a sleep period of the DRX control when the paging Paging subframe monitored by the UE is located Was sent.

The method further includes: the UE reading downlink data and signaling for the UE in the Paging subframe:

When the DRX process is run according to the DRX configuration parameter, the UE reads the aging information in the Paging subframe to which it belongs according to the Paging period when waking up, and checks the data and signaling for itself in the Paging subframe.

The process of the UE reading the paging information includes:

In addition to searching for the physical downlink control channel PDCCH carrying the paging scheduling information of the P-RNTI mask, the UE needs to search for the PDCCH space to find out whether there is a PDCCH that identifies the cell temporary identifier C-RNTI mask. Obtain the resource location of the physical downlink shared channel PDSCH sent to itself, and also listen to other control channels to obtain dedicated downlink control information.

The method further includes:

Configuring a specific DRX configuration parameter according to the service feature, and receiving, by the UE, the foregoing DRX configuration parameter that is sent by using the DRX configuration signaling;

When configuring the DRX configuration parameters, determine the DRX week according to the length of the UE Paging period. Whether the period matches the Paging period.

When the DRX period does not match the Paging period, the UE receives the mismatch notification sent by the network side by using signaling; or

The determining operation of whether the DRX period matches the Paging period is performed autonomously by the UE.

The UE also receives a notification that the network side sends the signaling: the downlink data and signaling for the UE are transmitted in the Paging subframe.

A system for implementing a DRX, the system includes a sleep confirmation unit, and a transmission unit; wherein the sleep confirmation unit is configured to confirm that a paging subframe monitored by the UE is located in a sleep period controlled by the DRX;

The transmitting unit is configured to: when the dormant confirmation unit confirms that the paging subframe monitored by the UE is in a DRX controlled sleep period, transmit downlink data and/or downlink signaling in a paging subframe of the UE.

The UE is configured to read downlink data and signaling for the UE in the Paging subframe:

When the UE reads the paging information, it is used to:

In addition to searching for the PDCCH carrying the Paging scheduling information of the P-RNTI mask, the PDCCH space needs to be searched to find out whether there is a PDCCH that identifies the C-RNTI mask, so as to acquire the resource location of the PDSCH sent to itself, and also listen to other control channels. Obtain dedicated downlink control information.

The transmission unit is further configured to:

Configure specific DRX configuration parameters based on service characteristics, and pass the above DRX configuration parameters. The DRX configuration signaling is sent to the UE;

When the DRX configuration parameter is configured, it is determined whether the DRX period and the Paging period match according to the length of the UE Paging period.

The transmitting unit is further configured to notify the UE of the mismatched state by using the signaling when the DRX period does not match the Paging period; or

The determining operation of the UE for autonomously performing whether the DRX cycle matches the Paging cycle.

The transmitting unit is further configured to notify the UE by using signaling that downlink data and signaling for the UE are transmitted in the Paging subframe.

The technology of the present invention implements DRX, and allows the network side to transmit downlink data and/or signaling for the UE during paging during the DRX slee of the UE, so that the UE may use the opportunity of the Paging subframe to wake up and cache the downlink data. And/or signaling is delivered to the UE in time, without waiting for the next On Duration to arrive, the data can be sent to the UE in time, the UE is more power-saving, and the user experience can be improved, and the amount of data buffered by the network side can also be reduced. . DRAWINGS

1 is a schematic diagram of implementing DRX according to an embodiment of the present invention;

2 is a schematic flowchart of implementing DRX according to an embodiment of the present invention;

FIG. 3 is a system diagram of implementing DRX according to an embodiment of the present invention. detailed description

In a practical application, if the Paging subframe monitored by the UE is located in the Sleep period of the DRX control, the network side may transmit downlink data or downlink signaling in the Paging subframe for the UE, regardless of whether the UE is in the Sleep cycle of the DRX. The UE may read downlink data and signaling for the UE in the Paging subframe.

Specifically, according to the characteristics of the service operated by the UE, the network side decides to configure the DRX for the UE. Configuration parameters. The service characteristics include a data transmission periodicity, a data packet size, a delay requirement, and the like; and the DRX configuration parameter includes a DRX cycle and the like.

Moreover, the network side can determine whether it is suitable to configure the DRX mechanism according to the service characteristics, and specific DRX configuration parameters, such as a long DRX cycle, a short DRX cycle, a short DRX cycle, an activation timer, a retransmission timer, The number of short DRX cycles, etc., and the above DRX configuration parameters are sent to the UE through DRX configuration signaling.

When the DRX cycle is configured, the network side can determine whether the DRX period (long DRX period and/or short DRX period) matches the Paging period according to the length of the UE Paging period, that is, whether the Paging subframe is in the On Duration of the DRX mechanism. , if yes, confirm the match; otherwise, confirm that there is no match. When there is no match, the network side can notify the UE of the mismatch status by signaling.

The UE receives the DRX configuration signaling sent by the network, and starts the DRX process in the UE according to the configured DRX configuration parameter, and according to the indication on the network side, the current DRX cycle does not match the Paging period.

Of course, it is also possible for the UE to determine whether the DRX period matches the Paging period, instead of being indicated by the network side.

When the DRX process is run according to the DRX configuration parameter, the UE may read the paging information in the Paging subframe to which the UE belongs according to the Paging period when waking up; and the UE also needs to check whether the Paging subframe has data for itself. Signaling.

Specifically, the UE needs to search for the PDCCH space in addition to the PDCCH carrying the Paging scheduling information of the P-RNTI (Paging Radio Network temporary identifier) mask, and finds whether there is a self-identification C- RNT Cell Radio network temporary identifier, PDCCH of the mask, in order to obtain the resource location of the physical downlink shared channel (PDSCH) sent to itself, and also listen to other control channels to obtain dedicated downlink control information. The invention will now be described in connection with the embodiments and the accompanying drawings.

The UE initiates a service. According to the characteristics of the service (such as data transmission periodicity, delay requirement, etc.), the network side determines to configure the DRX configuration parameter for the UE;

The DRX configuration parameters that are adapted to the characteristics of the service data are configured on the network side, and the DRX configuration parameters are sent to the UE through the DRX configuration signaling. In the configured DRX configuration parameters, the short DRX cycle is 10ms and the Long DRX Cycle is 521ms.

When the network side is configured with the DRX cycle, the Paging period of the UE is 320 ms. The DRX cycle and the Paging period are not matched. The network side adds an indication bit to the DRX configuration signaling to notify the UE of the mismatch status. Further indication: The network side transmits downlink data and/or signaling to the UE in the Paging subframe.

The UE receives the DRX configuration signaling sent by the network side, and starts the DRX process in the UE according to the DRX configuration parameter carried in the UE, and according to the indication of the network side, the current DRX cycle does not match the Paging period.

Certainly, the network side may not actively add an indication bit for indicating the DRX Cycle and the Paging period mismatch in the configuration signaling, but the UE compares with the previously acquired Paging period when receiving the DRX configuration parameter to confirm the DRX. Whether the period matches the Paging period. Once the mismatch is found, the UE confirms that the network side may transmit downlink data and/or signaling in the Paging subframe.

When the DRX process is run according to the DRX configuration parameter, the UE may read the paging information in the Paging subframe to which the UE belongs according to the Paging period when waking up, and the UE also needs to check whether there is data and information for the subframe in the subframe. make. Specifically, in addition to searching for the PDCCH carrying the Paging scheduling information of the P-RNTI mask, the UE needs to search for the PDCCH space, and finds whether there is a PDCCH that identifies the C-RNTI mask, so as to obtain the resource location of the PDSCH sent to itself. Listen to other control channels to obtain dedicated downlink control information.

As shown in Figure 1, the Paging subframes of the UE are not necessarily in the activation period of the DRX. The Paging subframe is in the active period of DRX and is processed in the current normal manner. For example, when there is downlink data and signaling, the network side immediately sends the downlink data and signaling to the UE.

Specifically, if the Paging subframe is not in the activation period of the DRX, it means that the UE should be in the dormant period according to the DRX mechanism, and in order to receive the Paging, the UE must wake up, and the network side also knows that the UE will wake up at this moment, so If there is buffered downlink data and/or signaling, the network side may send the buffered downlink data and/or signaling to the UE in the Paging subframe.

According to the description of the foregoing technical description, the operation of the DRX of the present invention can represent the process shown in FIG. 2, and the process includes the following steps:

Step 210: Confirm that the paging subframe monitored by the UE is in a sleep period controlled by the DRX. Step 220: Transmit downlink data and/or downlink signaling in a paging subframe for the UE. In order to ensure that the above technical description and operation ideas can be smoothly implemented, the settings shown in Figure 3 can be performed. Referring to FIG. 3, FIG. 3 is a system diagram of implementing DRX according to an embodiment of the present invention, where the system includes a connected sleep confirmation unit and a transmission unit.

In practical applications, the sleep confirmation unit can confirm that the paging subframe monitored by the UE is in the sleep period controlled by the DRX. The transmission unit is capable of transmitting downlink data and/or downlink signaling for the paging subframe of the UE when the sleep confirmation unit confirms that the paging subframe monitored by the UE is in a sleep period controlled by the DRX.

In summary, the present invention implements the DRX technology, allowing the network side to transmit downlink data and/or signaling for the UE during paging during the DRX slee of the UE during the DRX slee of the UE, so that the UE may utilize the Paging When the subframe wakes up, the buffered downlink data and/or signaling is delivered to the UE in time, without waiting for the next On Duration to arrive, the data can be sent to the UE in time, so that the UE can save power and improve the user. The experience can also reduce the amount of data cached on the network side.

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 of claim 1, wherein the method further comprises the UE reading downlink data and signaling for the UE in the Paging subframe:

3. The method according to claim 2, wherein the process of the UE reading the paging information comprises:

The method according to any one of claims 1 to 3, wherein the method further comprises: configuring a specific DRX configuration parameter according to the service characteristic, and receiving, by the UE, the DRX configuration parameter sent by using the DRX configuration signaling;

5. The method according to claim 4, wherein

When the DRX period does not match the Paging period, the UE receives the mismatch notification sent by the network side by using signaling; or The determining operation of whether the DRX cycle matches the Paging cycle is performed autonomously by the UE.

6. The method according to claim 5, wherein the UE further receives a notification sent by the network side by signaling: downlink data and signaling for the UE are transmitted in the Paging subframe.

7. A system for implementing DRX, the system comprising a sleep confirmation unit and a transmission unit; wherein

The dormancy confirmation unit is configured to confirm that the paging subframe monitored by the UE is in a sleep period controlled by the DRX;

8. The system according to claim 7, wherein the UE is configured to read downlink data and signaling for the UE in the Paging subframe:

When the DRX process is run according to the DRX configuration parameter, the UE reads the paging information in the Paging subframe to which it belongs according to the Paging period when waking up, and checks the data and signaling for itself in the Paging subframe.

The system according to claim 8, wherein when the UE reads the paging information, it is used to:

The system according to any one of claims 7 to 9, wherein the transmission unit is further configured to:

11. The system of claim 10, wherein

When the DRX period does not match the Paging period, the transmitting unit is further configured to notify the UE of the mismatch status by using a signaling; or

The method according to claim 11, wherein the transmitting unit is further configured to notify the UE by signaling that downlink data and signaling for the UE are to be transmitted in the Paging subframe.