WO2020140815A1

WO2020140815A1 - D2d data reception method and apparatus

Info

Publication number: WO2020140815A1
Application number: PCT/CN2019/128495
Authority: WO
Inventors: 吕叶青; 张传欣
Original assignee: 海信集团有限公司
Priority date: 2019-01-03
Filing date: 2019-12-26
Publication date: 2020-07-09
Also published as: CN111405610A; CN111405610B

Abstract

Provided in embodiments of the present invention are a D2D data reception method and device. A relay UE unit receives data by means of a sidelink between a remote UE unit and itself. The relay UE unit is configured to be in a discontinuous reception state. The discontinuous reception state comprises a long discontinuous reception state and a short discontinuous reception state. The relay UE unit activates the long discontinuous reception state, and if an inactivity timer expires in the long discontinuous reception state, the relay UE unit switches to the short discontinuous reception state.

Description

D2D data receiving method and equipment

This application requires the priority of the Chinese patent application filed on January 03, 2019, with the application number 201910005843.3 and the invention titled "A D2D data receiving method and equipment", the entire contents of which are incorporated herein by reference Applying.

Technical field

The invention relates to the technical field of D2D (Device to Device), in particular to a D2D data receiving method and device.

Background technique

The types and number of smart devices are growing rapidly, such as smart bracelets, smart watches, smart phones, wearable devices, etc. These devices will be used to reduce eNB (base station) pressure, improve network performance, reduce transmission delay, and reduce transmission delay through D2D communication technology. New ways to improve resource utilization.

Relay (relay) technology based on D2D communication is a further extension of D2D, and is also one of the key directions of current and subsequent standardization development, which can give full play to the advantages of D2D communication.

As shown in Figure 1, in the scenario of UE-to-Network Relay one-way relay for D2D communication, after a Sidelink (direct link) is established between Relay UE (Relay Device) and Remote UE (Remote Terminal), The two perform relay communication. The UL (uplink) of the Remote UE accesses the eNB base station through the Relay, and the DL (downlink) of the Remote UE directly connects through the eNB base station.

As shown in Figure 2, in the scenario of UE-to-Network Bidirectional Relay for D2D communication, after Sidelink is established between Relay UE and Remote UE, the two perform uplink and downlink relay communication. For UL, Remote UE will be sent to Relay UE, for DL, Relay UE will be sent to Remote UE.

A direct link (Sidelink) is established between Relay UE and Remote UE. During the relay communication between the two, for PC5 UL, Remote UE will send uplink data to Relay UE, for PC5 DL, Relay UE will send downlink data. For Remote UE, Relay UE or Remote UE, always check whether there is business data on Sidelink, it will consume a lot of power, and a major feature of smart devices is the limited battery capacity, the balance between energy saving and business data processing. Has become an urgent problem to be solved.

Summary of the invention

Embodiments of the present invention provide a D2D data receiving method and terminal, so as to better balance energy saving of equipment and balance of service data processing.

According to a first aspect of the embodiments of the present invention, a D2D data reception method is provided, which is applied to a Relay UE relay device. The method includes:

Relay UE relay equipment receives data through the sidelink direct link with Remote UE remote equipment,

The Relay UE is configured to be in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

Relay The UE relay device starts long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

If in the long-period discontinuous reception, the timer times out and the counter reaches a preset threshold, the Relay UE relay device switches to short-period discontinuous reception.

According to some embodiments, after the relay relay device switches to the short-period discontinuous reception step, the method further includes:

Relay UE relay equipment starts short-period discontinuous reception;

According to the preset number of short-period discontinuous reception cycles, if the number of short-period discontinuous reception cycles is reached, the Relay UE relay device switches to long-period discontinuous reception.

According to some embodiments, the Relay UE relay device starts short-period discontinuous reception, and sets the SLDRX-ShortCycleTimer short-period discontinuous cycle timer to 3;

When the short-period discontinuous reception cycle timer expires, the Relay UE relay device switches to long-period discontinuous reception.

Relay UE relay equipment starts short-period discontinuous reception;

If a handover command sent by Remote UE is received, Relay UE relay equipment switches to long-period discontinuous reception.

According to some embodiments, specifically,

Receive the Remote UE remote device through the LCID MAC PDU, send SL Long DRX Indicator switching command.

A second aspect of an embodiment of the present invention provides a D2D data reception method, which is applied to a remote UE remote device, and is characterized in that it includes:

Remote UE remote device receives data through the sidelink direct link with Relay UE relay device,

The Remote UE is configured in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

Remote UE initiates long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

If in the long-period discontinuous reception, the timer times out and the counter reaches a preset threshold, the Remote UE remote device switches to short-period discontinuous reception.

A third aspect of the embodiments of the present invention provides a Relay UE relay device in D2D, which is characterized in that it includes:

A memory for storing executable instructions of the processor;

A processor; when the processor runs the executable instruction, the relay UE relay device receives data through a sidelink direct link with a Remote UE remote device, wherein the Relay UE relay device It is configured to be in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

A fourth aspect of the embodiments of the present invention provides a remote UE remote device in D2D, which is characterized in that it includes:

A memory for storing executable instructions of the processor;

A processor; when the processor runs the executable instruction, the remote UE remote device receives data through a sidelink direct link with the Relay UE relay device, wherein the Remote UE remote device It is configured to be in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

In the embodiment of the present invention, based on two scenarios of one-way relay and two-way relay in UE-to-Network Relay, a D2D data reception method is proposed, which is applied to Relay UE relay equipment or Remote UE remote equipment in. This method configures Relay UE or Remote UE to be in a discontinuous reception state. Discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception. Among the long-period discontinuous reception, relatively short-period discontinuous reception The sleep time of the sex receiving state is longer to save power consumption. After the Relay or UE is configured for discontinuous reception, it can be configured as a long-period discontinuous reception state by default. According to the long-period discontinuous reception state, Whether the timer times out and the value of the PSCCH counter to determine the size of the traffic. If the timer times out and the value of the PSCCH counter reaches a preset threshold, it can be considered that the traffic is relatively large, and you need to switch Relay or UE or Remote The UE receives discontinuous reception in a short period, so as to handle relatively large traffic in time. In the embodiment of the present invention, the reception of data received by dynamically controlling the sidelink through link is switched from the long-period non-continuity reception to the short-period non-continuity reception, which better balances the energy saving of the device and the balance of service data processing. .

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can also be obtained based on these drawings.

Figure 1 is a schematic diagram of a D2D unidirectional relay;

2 is a schematic diagram of a D2D two-way relay;

3 is a schematic diagram of a discontinuous reception provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a discontinuous reception monitoring PSCCH provided by an embodiment of the present invention;

5 is a schematic diagram of a discontinuous reception monitoring 5 PSCCHs provided by an embodiment of the present invention;

6 is a schematic diagram of a discontinuous reception switching cycle provided by an embodiment of the present invention.

FIG. 7 is a schematic diagram of a discontinuous reception switching cycle due to an instruction provided by an embodiment of the present invention.

FIG. 8 is a sequence diagram of a Relay UE configured for discontinuous reception provided by an embodiment of the present invention.

9 is a sequence diagram of a Remote UE configured for discontinuous reception according to an embodiment of the present invention.

FIG. 10 is a timing diagram of a Relay UE configured to receive discontinuously and perform periodic switching according to an embodiment of the present invention.

FIG. 11 is a sequence diagram of a Remote UE configured to receive discontinuously and perform periodic switching according to an embodiment of the present invention.

FIG. 12 is a sequence diagram of a Relay UE configured to receive discontinuously and perform periodic switching due to an instruction according to an embodiment of the present invention.

FIG. 13 is a timing diagram of a Remote UE configured to receive discontinuously and perform periodic switching due to a received command according to an embodiment of the present invention.

FIG. 14 is a flowchart of a relay UE configured to receive discontinuously according to an embodiment of the present invention.

FIG. 15 is a flowchart of a relay UE configured to receive discontinuously and perform periodic switching according to an embodiment of the present invention.

16 is a specific flowchart of a device configured to receive discontinuously and perform periodic switching according to an embodiment of the present invention.

FIG. 17 is a flowchart of a Relay UE configured to receive discontinuously and perform periodic switching due to a received command according to an embodiment of the present invention.

FIG. 18 is a specific flowchart of a device configured to receive discontinuously and perform periodic switching due to a reception instruction according to an embodiment of the present invention.

19 is a frame diagram of an electronic device provided by an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Based on the two-way relay and two-way relay in the UE-to-Network Relay, because the transmission of Sidelink communication service is usually bursty, there is only data transmission within a certain period of time. Most of the time, the device UE does not have data interaction. If the UE continues to monitor the PSCCH (Physical) Sidelink Control (Channel) subframes at this time, obviously the power consumption is relatively large, so if the UE does not continuously monitor the PSCCH (Physical Sidelink) Control (Channel) subframe can achieve the purpose of energy saving, and will not affect the service processing, so in the embodiment of the present invention, Relay UE (relay device) can be configured as discontinuous reception (DRX), Remote UE (Remote (Remote terminal) can also be configured for discontinuous reception (DRX). In the embodiment of the present invention, DRX is directed to a D2D direct link (Sidelink), so it is called Sidelink DRX (SL-DRX).

Relay Discontinuous Reception (SL-DRX) of UE (relay equipment) is a power-saving working mode, which allows Relay UE not to enter idle mode when there is no data reception, which not only saves power but also saves power Make sure to receive the data from Remote UE.

Remote Discontinuous Reception (SL-DRX) of UE (relay equipment) is a power-saving working mode, which enables Remote UE to not enter idle mode when there is no data reception, which not only saves power but also saves power Ensure that the data of Relay UE is received, so as to ensure the synchronization status with the eNB base station. If the Remote UE is not configured with the DRX working mode, the Remote UE will always monitor the PSCCH (Physical Sidelink Control) Channel subframe to check whether there is information from the serving cell.

In FIG. 14, step 101: Relay UE relay device receives data through a sidelink direct link with Remote UE remote device, the Relay UE relay device is configured in a discontinuous reception state, and the discontinuous reception Including long-period discontinuous reception and short-period discontinuous reception.

In some embodiments of the present invention, the DRX of Sidelink (Sidelink) is Sidelink DRX (SL-DRX), both Relay and UE in D2D can be configured with SL-DRX separately or simultaneously, and one SL-DRX cycle Namely SLDRX-Cycle, one SL-DRX cycle includes the monitoring and sleep of the UE device, and one SL-DRX cycle can be divided into at least two types, including SLShortDRX-Cycle and SLLongDRX-Cycle, where

SLShortDRX-Cycle has a shorter sleep time than SLLongDRX-Cycle.

In FIG. 14, step 102: Relay UE relay equipment starts long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

In some embodiments, the parameters of SL-DRX include SLDRX-onDurationTimer,

SLDRX-InactivityTimer, SLDRX-Cycle, SLDRX-StartOffset, and PSCCH-Counter. The detailed definition of each parameter is as follows:

(1) SLDRX-onDurationTimer: Calculated from the beginning of a SL-DRX cycle and continuously monitor the number of subframes of PSCCH.

(2) SLDRX-InactivityTimer: After the UE monitors the PSCCH sent by another UE, the number of continuous PSCCH subframes that are continuously activated, and the timer will restart every time the PSCCH is monitored.

(3) SLDRX-Cycle: The number of subframes included in an SL-DRX cycle, including two cycle parameters, SLShortDRX-Cycle and SLLongDRX-Cycle,

SLShortDRX-Cycle is a short SL-DRX cycle, while SLLongDRX-Cycle is a long SL-DRX cycle. The sleep time of SLLongDRX-Cycle is longer than SLShortDRX-Cycle, so it saves more power. By default, SLLongDRX-Cycle will be used. .

(4) SLDRX-StartOffset: The subframe position at which each SL-DRX cycle starts.

If the UE currently uses SLShortDRX-Cycle, the system frame number (SFN, System Frame Number) and subframe number (subframeNumber) need to satisfy [(SFN*10)+subframeNumber]modulo(SLShortDRX-Cycle)=(SLDRX-StartOffset)modulo(SLShortDRX -Cycle);

If the UE currently uses SLLongDRX-Cycle, SFN and subframeNumber need to satisfy [(SFN*10)+subframeNumber]modulo(SLLongDRX-Cycle)=

SLDRX-StartOffset. The period of SFN is 1024, and each frame contains 10 subframes. To calculate the position of the starting subframe, multiply SFN by 10.

(5) PSCCH-Counter: PSCCH counter, used to record the number of PSCCH monitored. Since the timeout of SLDRX-InactivityTimer does not reflect the size of the traffic, in this embodiment of the present invention, a PSCCH counter can be set for the one-way relay and two-way relay scenarios for SL-DRX configured Relay UE or Remote UE, Used to judge the size of business volume. When the PSCCH arrives, the PSCCH counter is incremented by one to record the number of PSCCH arrivals.

In FIG. 14, step 103: If in the long-period discontinuous reception, the InactivityTimer timer times out and the counter reaches a preset threshold, the Relay UE relay device switches to short-period discontinuous reception.

When the SLDRX-InactivityTimer times out, the number of PSCCH arrivals recorded in the PSCCH-Counter will be used to compare with a preset threshold nth, according to whether the number of PSCCH arrivals is equal to or exceeds this threshold, so as to more accurately determine the amount of traffic size.

SLDRX-InactivityTimer times out, and PSCCH-Counter reaches a preset threshold, it can be determined that the traffic is large, then Relay UE relay equipment switches to short-period discontinuous reception.

In order to explain the various situations of the entire process of SL-DRX in more detail, a specific embodiment 1 is listed below. In embodiment 1, the values of various parameters are shown in Table 1, and the values in Table 1 The value is only a specific example in the embodiment. The values of various parameters in the SL-DRX cycle can be configured as other values, and are not limited to the values in Table 1. The value psf in Table 1 refers to PSCCH subframe (PSCCH subframe), psf1 refers to the number of subframes sending one PSCCH, and sending one PSCCH is one subframe.

Table 1

SL-DRX configuration parameters involve two timers, namely SLDRX-onDurationTimer and SLDRX-InactivityTimer.

The condition for the start of SLDRX-onDurationTimer is if the UE currently uses SLShortDRX-Cycle and satisfies [(SFN*10)+subframeNumber]modulo(SLShortDRX-Cycle)=(SLDRX-StartOffset)modulo(SLShortDRX-Cycle) or the UE currently uses SLLongDRX -Cycle and satisfy [(SFN*10)+subframeNumber]modulo(SLLongDRX-Cycle)=SLDRX-StartOffset, the condition for stopping is that the timer expires;

The start condition of SLDRX-InactivityTimer is to monitor the PSCCH, and the stop condition is that the timer times out; when the SLDRX-InactivityTimer times out and the value of the PSCCH-Counter counter is greater than or equal to the threshold of the PSCCH-Counter nth, it is judged that the traffic is heavy , Switch from long cycle to short cycle.

In the scenario of one-way relay and two-way relay, the SL-DRX configured Relay starts the SLDRX-onDurationTimer during OnDuration and starts to monitor the PSCCH from the Remote UE. There will be two cases here, one is in this During this period, the PSCCH from Remote UE was not monitored. In another case, the PSCCH from Remote UE was monitored, as follows:

1. No PSCCH from Remote UE is monitored;

If the PSCCH from Remote UE is not heard during OnDuration, it will go to sleep and wait for the next cycle to start and then wake up.

As shown in Figure 3, the value of SLLongDRX-Cycle is psf10, which includes 10 subframes, which are represented by 10 small rectangles in the figure, each small rectangle represents a subframe within the period, where SLDRX-onDurationTimer takes The value is psf2. In the figure, it is represented by the first two small rectangles with left diagonal lines, and the eight blank small rectangles at the back indicate that they are in the sleep state.

In this SLLongDRX-Cycle cycle, the first 2 subframes are used for monitoring, and the last 8 subframes are used for sleep. If SL-DRX configured Relay in this cycle is not monitored in the first 2 subframes, the remote UE PSCCH, the next 8 subframes go to sleep, wait for the next cycle to start and then wake up, and repeat the cycle.

The PSCCH counter is 0.

2. Monitor a PSCCH from Remote UE;

If a PSCCH from Remote UE is monitored during OnDuration, an SLDRX-InactivityTimer is started and decoded while the timer is running, while continuing to monitor the PSCCH from Remote UE. If the decoding is successful, and there is no PSCCH from Remote UE in the timer, wait for the timer to end and switch back to the original state.

As shown in Figure 4(a), the value of SLLongDRX-Cycle is psf10, including 10 subframes, which are represented by 10 small rectangles in the figure, where the value of SLDRX-onDurationTimer is psf2, which is used in the figure The first two small rectangles with left slashes indicate that during this period, a PSCCH from Remote UE was heard, that is, in the subframe represented by the second small rectangle in the figure, a PSCCH from Remote UE was heard. PSCCH, then start a SLDRX-InactivityTimer and decode during the running of the timer, where

The value of SLDRX-InactivityTimer is psf3, which is represented by a small rectangle with a right slash in Figure 4(a). Since the timer starts from the second small rectangle, it is shown in Figure 4(a) , SLDRX-InactivityTimer is from the second small rectangle to the fourth small rectangle, a total of 3 small rectangles to represent.

If the decoding is successful within the period of running the timer, that is, the period from the second small rectangle to the fourth small rectangle, and there is no PSCCH from the Remote UE detected in the timer, wait for the timer to end, Enter the sleep state represented by the fifth small rectangle,

When the timer expires, the PSCCH counter is 1, and it is determined whether the PSCCH counter has reached a preset threshold. If the preset threshold is 3, the PSCCH counter has not reached this threshold.

In this case, the timer times out, but the counter does not reach the preset threshold, it is considered that the Relay UE traffic is relatively small, and there is no need to switch the Relay UE to the short-period discontinuous reception state.

Waiting for the next cycle to start, it still returns to the original SLLongDRX-Cycle cycle, which is the repetition of the SLLongDRX-Cycle cycle shown in Figure 3.

3. Two PSCCHs from Remote UE are monitored;

If a PSCCH from Remote UE is monitored during OnDuration, an SLDRX-InactivityTimer is started and decoded while the timer is running, while continuing to monitor the PSCCH from Remote UE. If the PSCCH from Remote UE is heard again, restart SLDRX-InactivityTimer.

As shown in Figure 4(b), the value of SLLongDRX-Cycle is psf10, including 10 subframes, which are represented by 10 small rectangles in the figure, where the value of SLDRX-onDurationTimer is psf2, which is used in the figure The first two small rectangles with left slashes indicate that during this period, a PSCCH from Remote UE was heard, that is, in the subframe represented by the second small rectangle in the figure, a PSCCH from Remote UE was heard. PSCCH, start an SLDRX-InactivityTimer and decode and continue to monitor the PSCCH while the timer is running. The value of SLDRX-InactivityTimer is psf3. In Figure 4(b), a small rectangle with a right slash is used. It shows that since the timer starts from the second small rectangle, in FIG. 4(b), the SLDRX-InactivityTimer is represented by three small rectangles from the second small rectangle to the fourth small rectangle.

If the PSCCH from Remote UE is heard again within the period from the second small rectangle to the fourth small rectangle during the running period of the timer, that is, from the Remote For the PSCCH of the UE, the SLDRX-InactivityTimer is restarted. The restarted SLDRX-InactivityTimer is represented by a total of three small rectangles from the fourth small rectangle to the sixth small rectangle.

Wait for the timer to end, enter the sleep state represented by the seventh small rectangle,

The PSCCH counter is 2.

When the timer expires, the PSCCH counter is 2, and it is determined whether the PSCCH counter has reached a preset threshold. If the preset threshold is 3, the PSCCH counter has not reached this threshold.

4. Listening to more PSCCH from Remote UE, causing the timer to time out;

If a PSCCH from Remote UE is monitored during OnDuration, an SLDRX-InactivityTimer is started and decoded while the timer is running, while continuing to monitor the PSCCH from Remote UE. If the PSCCH from the Remote UE is heard again, the SLDRX-InactivityTimer is started for the second time, and it is decoded during the running period of the timer started the second time, while continuing to listen to the PSCCH from the Remote UE and continuously looping.

As shown in Figure 5, the value of SLLongDRX-Cycle is psf10, including 10 subframes, which are represented by 10 small rectangles in the figure, where the value of SLDRX-onDurationTimer is psf2, and the first two are used in the figure. It is indicated by a small rectangle with a left slash. During this period, a PSCCH from Remote UE is heard. That is, in the subframe represented by the second small rectangle in the figure, a PSCCH from Remote UE is heard. An SLDRX-InactivityTimer decodes and continues to monitor the PSCCH while the timer is running, where the value of SLDRX-InactivityTimer is psf3, which is represented by a small rectangle with a right slash in Figure 5, since the second The small rectangle starts to start the timer, so in FIG. 5, SLDRX-InactivityTimer is represented by a total of three small rectangles from the second small rectangle to the fourth small rectangle.

If the PSCCH from Remote UE is heard again within the period from the second small rectangle to the fourth small rectangle during the running period of the timer, that is, from the Remote For the PSCCH of the UE, the SLDRX-InactivityTimer is started for the second time, and the SLDRX-InactivityTimer started for the second time is represented by a total of three small rectangles from the fourth small rectangle to the sixth small rectangle.

If the PSCCH from the Remote UE is monitored for the third time within the period from the second small rectangle to the sixth small rectangle during the timer running period, that is, during the sixth small rectangle After listening to the PSCCH from Remote UE, the SLDRX-InactivityTimer is started for the third time. The SLDRX-InactivityTimer started for the third time is represented by a total of three small rectangles from the sixth small rectangle to the eighth small rectangle.

If the PSCCH from the Remote UE is monitored for the fourth time within the period from the third small rectangle to the eighth small rectangle during the running period of the timer, that is, during the eighth small rectangle When the PSCCH from Remote UE is heard, the SLDRX-InactivityTimer is started for the fourth time. The SLDRX-InactivityTimer started for the fourth time is represented by 3 small rectangles from the 8th small rectangle to the 10th small rectangle.

If the PSCCH from Remote UE is monitored for the fifth time within the period from the 8th small rectangle to the 10th small rectangle during the running period of the timer started at the fourth time, that is, during the 10th small rectangle I also heard the PSCCH from Remote UE, and according to the trigger rule, it will cause the SLDRX-InactivityTimer to be started for the fifth time.

The SLDRX-InactivityTimer started for the fifth time according to the trigger rule. If this timer is to be completed, the current SL-DRX cycle will be exceeded, causing the SLDRX-InactivityTimer to time out.

When the timer expires, the PSCCH counter is 5, and it is determined whether the PSCCH counter has reached a preset threshold. If the preset threshold is 3, the PSCCH counter has reached this threshold.

In this case, if the timer times out and the counter reaches a preset threshold, it is considered that the Relay UE traffic is relatively large, and the Relay UE needs to be switched to a short-period discontinuous reception state.

5. Decoding fails, causing the timer to time out

When the SLDRX-InactivityTimer is started, it needs to be decoded within the running period of the timer. If the decoding fails, the SLDRX-InactivityTimer times out.

If a PSCCH is detected during the OnDuration and the decoding fails, the timer expires, and the PSCCH counter is 1, to determine whether the PSCCH counter has reached a preset threshold. If the preset threshold is 3, the PSCCH counter has not reached this threshold. .

If a PSCCH is heard during OnDuration, the PSCCH decoding is successful, but the second PSCCH decoding fails, the SLDRX-InactivityTimer timer expires.

In this situation, the timer expires and the PSCCH counter is 2, to determine whether the PSCCH counter has reached a preset threshold. If the preset threshold is 3, the PSCCH counter has not reached this threshold.

As shown in FIG. 8, the eNB configures SL-DRX for Relay UE, and the timing diagram of Relay UE receiving discontinuously in a long period.

Step 8 in FIG. 8: The eNB configures SL-DRX for the Relay UE, specifically, the eNB base station sends RRC MAC-MainConfig to the Relay UE.

Step 8 in Figure 8: Relay UE starts the SL-DRX cycle from the position corresponding to the initial subframe, first enters OnDuration, Relay UE starts to monitor PSCCH;

Step 8 of Figure 8: PSCCH of the Remote UE is received, and the PSCCH-Counter counter is incremented;

Figure 8 Step 4: Start SLDRX-InactivityTimer, decode and continue listening until SLDRX-InactivityTimer times out;

Step 5 in Figure 8: and obtain the current number of arrivals n counted by the PSCCH-Counter counter, by judging whether n is greater than or equal to nth, if not, it is judged that the traffic is small;

Figure 8 Step 6: Relay UE continues to use long-period discontinuous reception.

As shown in FIG. 9, the eNB configures SL-DRX for Remote UE, and the timing diagram of Remote UE discontinuous reception in a long period.

Step 9 in Figure 9: eNB configures SL-DRX for Remote UE, specifically, eNB base station sends RRC MAC-MainConfig to Remote UE.

Step 9 in Figure 9: Remote UE starts the SL-DRX cycle from the position corresponding to the initial subframe, first enters OnDuration, and Remote UE starts to monitor PSCCH;

Step 9 of Figure 9: PSCCH of the Relay UE is received, and the PSCCH-Counter counter of the Remote UE is incremented;

Figure 9 Step 4: Start SLDRX-InactivityTimer, decode and continue listening until SLDRX-InactivityTimer times out;

Step 5 of Figure 9: and obtain the current number of arrivals n counted by the PSCCH-Counter counter, by judging whether n is greater than or equal to nth, if not, it is judged that the business volume is small;

Figure 9 Step 6: Remote UE continues to use long-period discontinuous reception.

In Embodiment 1, after the device is configured for discontinuous reception, it can be configured as a long-period discontinuous reception state by default. According to whether the SLDRX-InactivityTimer timer times out and the value of the PSCCH counter in the long-period discontinuous reception state Size, so as to determine the size of the traffic, if the SLDRX-InactivityTimer timer expires and the value of the PSCCH counter reaches a preset threshold, it can be considered that the traffic is relatively large, and the device needs to be switched to short-period discontinuous reception, thus Handle relatively large business volumes in a timely manner. In Embodiment 1 of the present invention, the reception of data received by dynamically controlling the sidelink through link is switched from a long-period non-continuity reception to a short-period non-continuity reception, which achieves a balance between energy saving of the device and service data processing.

In the second embodiment, the device can return from the short-period discontinuous reception to the long-period discontinuous reception. The method is to switch to the long-period discontinuous reception automatically after reaching the number of cycles of the short-period discontinuous reception.

As shown in step 104 in FIG. 15: Relay UE relay equipment starts short-period discontinuous reception; according to the preset number of short-period discontinuous reception cycles, if the number of short-period discontinuous reception cycles is reached, Then Relay UE relay equipment switches to long-period discontinuous reception.

The parameter SLDRX-ShortCycleTimer can be included in the parameter configuration.

SLDRX-ShortCycleTimer: This value is a multiple of SLShortDRX-Cycle, indicating the total frame length that SLShortDRX-Cycle can run.

Table 2

Relay The UE relay device starts short-period discontinuous reception, starts to use SLShortDRX-Cycle and starts SLDRX-ShortCycleTimer, SLDRX-ShortCycleTimer is configured to 3, then when the short-period discontinuous reception cycle is 3 times, this timer times out, SLDRX -ShortCycleTimer stops. Then Relay UE relay equipment switches back to long-period discontinuous reception.

As shown in Figure 6, the device initiates short-period discontinuous reception, that is, SLShortDRX-Cycle. In Figure 6, a SLShortDRX-Cycle has 5 subframes, and the first 2 subframes are monitored, that is, the first 2 subframes are OnDuration, This is the same as the monitoring of long-period discontinuous reception. The last three subframes of short-period discontinuous reception go to sleep. When the device starts to use SLShortDRX-Cycle, it is necessary to start SLDRX-ShortCycleTimer. The configuration of SLDRX-ShortCycleTimer is 3. Then, when the short-cycle discontinuous reception cycle is 3 times, in FIG. 6, the 5 subframes represented by SLShortDRX-Cycle are cycled 3 times. At this time, the timer expires and the SLDRX-ShortCycleTimer stops. Then, the relay equipment of the relay returns to long-period discontinuous reception, that is, 10 subframes represented by SLLongDRX-Cycle in FIG. 6.

As shown in FIG. 10, the eNB configures SL-DRX for the Relay UE, and the relay UE is in a long-period discontinuous reception and switches to a short-period discontinuous reception timing diagram.

Step 10 in FIG. 10: The eNB configures SL-DRX for the Relay UE, specifically, the eNB base station sends RRC MAC-MainConfig to the Relay UE.

Figure 10 Step 2: The UE starts the SL-DRX cycle from the position corresponding to the initial subframe, first enters OnDuration, and the Relay starts monitoring the PSCCH;

Step 10 of Figure 10: PSCCH of the Remote UE is received, and the PSCCH-Counter counter is incremented;

Figure 10 Step 4: Start SLDRX-InactivityTimer, decode and continue listening until SLDRX-InactivityTimer times out;

Step 10 in Figure 10: Obtain the current number of arrivals n counted by the PSCCH-Counter counter, by judging whether n is greater than or equal to nth, if it is, it is judged that the traffic is large;

Figure 10 Step 6: Relay UE switches to short-cycle discontinuous reception, namely SLShortDRX-Cycle, and starts SLDRX-ShortCycleTimer.

Figure 10 Step 7: When the SLDRX-ShortCycleTimer times out, the Relay UE switches back to long-period discontinuous reception.

As shown in Fig. 11, the eNB configures SL-DRX for Remote UE. The sequence diagram of Remote UE during long-period discontinuous reception and switching to short-period discontinuous reception.

Figure 11 Step 1: eNB configures SL-DRX for Remote UE, specifically, eNB base station sends RRC MAC-MainConfig to Remote UE.

Figure 11 Step 2: Remote UE starts the SL-DRX cycle from the position that matches the initial subframe, first enters OnDuration, Remote UE starts to monitor PSCCH;

Step 11 in Figure 11: PSCCH of the Relay UE is received, and the PSCCH-Counter counter of the Remote UE is incremented;

Figure 11 Step 4: Remote UE starts SLDRX-InactivityTimer, decodes and continues to listen until SLDRX-InactivityTimer times out;

Step 5 in Figure 11: Obtain the current number of arrivals n counted by the PSCCH-Counter counter, by judging whether n is greater than or equal to nth, if it is, it is judged that the traffic is large;

Figure 11 Step 6: Remote UE switches to short-cycle discontinuous reception, namely SLShortDRX-Cycle, and starts SLDRX-ShortCycleTimer.

Figure 11 Step 7: When the SLDRX-ShortCycleTimer times out, Remote UE switches back to long-period discontinuous reception.

As shown in FIG. 16, it is a specific flowchart of a device configured to receive discontinuously and perform periodic switching.

With Embodiment 2, the number of SLShortDRX-Cycle executions depends on SLDRX-ShortCycleTimer. After setting the parameter SLDRX-ShortCycleTimer, you can automatically switch back to SLLongDRX-Cycle, the system overhead is small, and the device can return to a more power-saving long cycle non-stop Continuous reception.

In Embodiment 3, the device can return from the short-period discontinuous reception to the long-period discontinuous reception by using a switching instruction sent by the Remote UE to switch to the long-period discontinuous reception.

As shown in FIG. 17, step 105: Relay UE relay equipment starts short-period discontinuous reception; if a handover command sent by Remote UE is received, Relay UE relay equipment switches to long-period discontinuous reception.

In some embodiments, the control signaling parameter for dynamically instructing the SL-DRX cycle configuration switching is SL long DRX Indicator, and the control signaling for SL-DRX cycle switching is dynamically delivered by the Remote UE to instruct the Relay to perform long-term Cycle switching.

The control signaling SL Long DRX Indicator can be expressed by the MAC PDU subheader carrying the LCID. The corresponding LCID is characterized on the SL-SCH, as shown in Table 3 below, to assign values to the LCID of the existing SL-SCH,

Table 3 Values of LCID for SL-SCH (Now configured)

In some embodiments, the SL Long DRX Indicator is placed in the LCID for SL-SCH, the position is 11011, as shown in Table 4, it is the assignment of the SL Long DRX Indicator in the LCID for SL-SCH.

IndexIndex	LCID valuesLCID values
1101111011	SL long DRX IndicatorSL Long DRX Indicator

Table 4 Values of LCID for SL-SCH(New)

Relay UE starts short-period discontinuous reception and works in SLShortDRX-Cycle. When Remote UE traffic is low, SL will send SL to DRX Relay to the UE through SL-DRX Command MAC control element. This command represents Remote UE at this time. There is less traffic on the line. After receiving the SL Long DRX Indicator, Relay UE will switch to SLLongDRX-Cycle in the next subframe that meets the initial conditions.

As shown in Figure 7, the device initiates short-period discontinuous reception, that is, SLShortDRX-Cycle. In Figure 7, a SLShortDRX-Cycle has 5 subframes, and the first 2 subframes are monitored, that is, the first 2 subframes are OnDuration, This is the same as the monitoring of long-period discontinuous reception. The last three subframes of short-period discontinuous reception go to sleep. When the device uses SLShortDRX-Cycle, it judges whether it has received SLlong DRX Indicator, when it receives SLlong DRX After Indicator, it will switch to SLLongDRX-Cycle in the next subframe that meets the initial conditions. In Figure 7, the second cycle of SLShortDRX-Cycle, during the OnDuration, listened to SL Long DRX Indicator. Then, after the second cycle ends, the device returns to long-period discontinuous reception, that is, 10 subframes represented by SLLongDRX-Cycle in FIG. 7.

As shown in FIG. 12, the eNB configures SL-DRX for the Relay UE, and the relay UE receives the long-period discontinuous reception and switches to the short-period discontinuous reception timing chart due to receiving the instruction.

Step 12 in FIG. 12: The eNB configures SL-DRX for the Relay UE, specifically, the eNB base station sends RRC MAC-MainConfig to the Relay UE.

Step 12 in Figure 12: Relay UE starts the SL-DRX cycle from the position corresponding to the initial subframe, first enters OnDuration, Relay UE starts to monitor PSCCH;

Figure 12 Step 3: After receiving the PSCCH of the Remote UE, the PSCCH-Counter counter increments by one;

Figure 4 Step 4: Start SLDRX-InactivityTimer, decode and continue to listen until SLDRX-InactivityTimer times out;

Figure 5 Step 5: Obtain the current number of arrivals n counted by the PSCCH-Counter counter, by judging whether n is greater than or equal to nth, if it is, it is judged that the traffic is large

Figure 12 Step 6: Relay UE switches to short-period discontinuous reception, namely SLShortDRX-Cycle.

Figure 12 Step 7: When receiving the SL Long Long DRX Indicator sent by Remote UE, Relay UE switches back to long-period discontinuous reception.

As shown in FIG. 13, the eNB configures SL-DRX for the Remote UE. The Remote UE receives the long-period discontinuous reception and switches to the short-period discontinuous reception timing chart due to receiving the command.

Step 13 in FIG. 13: The eNB configures SL-DRX for Remote UE, specifically, the eNB base station sends RRC MAC-MainConfig to Remote UE.

Figure 13 Step 2: Remote UE starts the SL-DRX cycle from the position corresponding to the initial subframe, first enters OnDuration, Remote UE starts to monitor PSCCH;

Step 13 of Figure 13: The PSCCH of the Relay UE is received, and the PSCCH-Counter counter of the Remote UE is incremented;

Figure 13 Step 4: Remote UE starts SLDRX-InactivityTimer, decodes and continues to listen until SLDRX-InactivityTimer times out;

Step 5 in Fig. 13: Obtain the current number of arrivals n counted by the PSCCH-Counter counter, by judging whether n is greater than or equal to nth, if it is, it is judged that the traffic is large;

Figure 13 Step 6: Remote UE switches to short-period discontinuous reception, namely SLShortDRX-Cycle.

Step 13 in Fig. 13: When receiving the SL Long Long DRX Indicator sent by the Relay UE, the Remote UE switches back to long-period discontinuous reception.

As shown in FIG. 18, it is a specific flowchart of a device configured to receive discontinuously and perform periodic switching.

With Embodiment 3, since the Relay can dynamically learn the size of the traffic from the Remote UE, it can switch from SLShortDRX-Cycle back to SLLongDRX-Cycle after receiving the command, which can meet the requirements of the traffic.

Based on the same inventive concept, an electronic device is also provided in the embodiments of the present invention. Since the method corresponding to the device is the discontinuous reception method in the embodiments of the present invention, and the principle of the device to solve the problem is similar to this method, Therefore, the implementation of the device can be referred to the implementation of the above method, and the repetition is not repeated here.

As shown in FIG. 19, an embodiment of the present invention provides an electronic device, including a transceiver 401, a central processor 402, a memory 403, an antenna 404 connected to the transceiver 401, and a peripheral device interface 405 connected to the central processor, and A power supply system 406 that provides power for electronic devices.

In some embodiments, a relay UE relay device in D2D is provided, including:

A memory for storing executable instructions of the processor;

In some embodiments, a remote UE device in D2D is provided, including:

A memory for storing executable instructions of the processor;

A processor; when the processor runs the executable instruction, the remote UE device receives data through a sidelink direct link with a Relay UE relay device, wherein the Remote UE remote device It is configured to be in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer usable program code.

The present invention is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and/or block in the flowchart and/or block diagram and a combination of the flow and/or block in the flowchart and/or block diagram may be implemented by computer program instructions. These computer program instructions can be provided to the processing unit of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processing unit of the computer or other programmable data processing device A device for realizing the functions specified in one block or multiple blocks of one flow or multiple blocks of a flowchart.

These computer program instructions may also be stored in a computer readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention is also intended to include these modifications and variations.

Claims

A D2D method for receiving data, which is applied to Relay UE relay equipment, and is characterized in that it includes:

Relay The UE relay device receives data through a sidelink direct link with the Remote UE. The Relay UE is configured to be in a discontinuous reception state. The discontinuous reception includes long-period discontinuous reception And short-period discontinuous reception;

Relay The UE relay device starts long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

If in the long-period discontinuous reception, the InactivityTimer timer times out and the counter reaches a preset threshold, the Relay UE relay device switches to short-period discontinuous reception.
The method according to claim 1, wherein after the relay UE relay device switches to the short-period discontinuous reception step, further comprising:

Relay UE relay equipment starts short-period discontinuous reception;

According to the preset number of short-period discontinuous reception cycles, if the short-period discontinuous reception cycle times are reached, the Relay UE relay device switches to long-period discontinuous reception.
The method according to claim 2, characterized in that:

Relay The UE relay equipment starts short-period discontinuous reception and sets the SLDRX-ShortCycleTimer short-period discontinuous cycle timer to 3;

When the short-period discontinuous reception cycle timer expires, the Relay UE relay device switches to long-period discontinuous reception.
The method according to claim 1, wherein after the relay UE switching device switches to the short-period discontinuous reception step, further comprising:

Relay UE relay equipment starts short-period discontinuous reception;

If a handover command sent by Remote UE is received, Relay UE relay equipment switches to long-period discontinuous reception.
The method according to claim 4, wherein the received handover command sent by the remote UE is specifically,

Receive the Remote UE remote device through the LCID MAC PDU, send SL Long DRX Indicator switching command.
A D2D data receiving method, applied to Remote UE remote equipment, which is characterized by:

Remote UE remote device receives data through the sidelink direct link with Relay UE relay device,

The Remote UE is configured in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

Remote UE initiates long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

If in the long-period discontinuous reception, the InactivityTimer timer times out and the counter reaches a preset threshold, the Remote UE remote device switches to short-period discontinuous reception.
The method according to claim 6, characterized in that after the step of the remote UE switching to the short-period discontinuous reception step, the method further comprises:

Remote UE starts short-period discontinuous reception;

According to the preset number of short-period discontinuous reception cycles, if the number of short-period discontinuous reception cycles is reached, the Remote UE switches to long-period discontinuous reception.
The method according to claim 5, characterized in that after the step of the remote UE switching to the short-period discontinuous reception step, the method further comprises:

Remote UE starts short-period discontinuous reception;

If a handover command sent by Relay UE relay equipment is received, the remote UE remote equipment switches to long-period discontinuous reception.
A relay UE relay device in D2D, which is characterized in that it includes:

A memory for storing executable instructions of the processor;

A processor; when the processor runs the executable instruction, the relay UE relay device receives data through a sidelink direct link with a Remote UE remote device, wherein the Relay UE relay device It is configured to be in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

Relay The UE relay device starts long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

If in the long-period discontinuous reception, the InactivityTimer timer times out and the counter reaches a preset threshold, the Relay UE relay device switches to short-period discontinuous reception.
A remote UE remote device in D2D, which is characterized in that it includes:

A memory for storing executable instructions of the processor;

A processor; when the processor runs the executable instruction, the remote UE remote device receives data through a sidelink direct link with the Relay UE relay device, wherein the Remote UE remote device It is configured to be in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

Remote UE initiates long-period discontinuous reception and sets a counter that counts the number of received PSCCH physical direct link control channels;

If in the long-period discontinuous reception, the InactivityTimer timer times out and the counter reaches a preset threshold, the Remote UE remote device switches to short-period discontinuous reception.