CN111405610B

CN111405610B - Method and equipment for receiving data by D2D

Info

Publication number: CN111405610B
Application number: CN201910005843.3A
Authority: CN
Inventors: 吕叶青; 张传欣
Original assignee: Hisense Co Ltd
Current assignee: Hisense Co Ltd
Priority date: 2019-01-03
Filing date: 2019-01-03
Publication date: 2022-04-05
Anticipated expiration: 2039-01-03
Also published as: CN111405610A; WO2020140815A1

Abstract

The embodiment of the invention provides a method and a device for receiving data by D2D, wherein the method comprises the following steps: the Relay equipment of the Relay UE receives data through a sidelink direct link between the Relay equipment of the Relay UE and Remote equipment of the Relay UE, the Relay equipment of the Relay UE is configured to be in a discontinuous receiving state, and the discontinuous receiving comprises long-period discontinuous receiving and short-period discontinuous receiving; the Relay equipment of Relay UE starts long-period discontinuous reception, and sets a counter which counts the times of received PSCCH physical direct link control channels; if the InactivetyTimer timer is overtime and the counter reaches a preset threshold value in the long-period discontinuous reception, the Relay UE Relay equipment is switched to the short-period discontinuous reception. The technical scheme provided by the embodiment of the invention achieves the balance of energy conservation and business data processing.

Description

Method and equipment for receiving data by D2D

Technical Field

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

Background

The variety and the quantity of smart machine increase rapidly, like smart bracelet, smart watch, smart mobile phone, wearable equipment etc. these equipment pass through D2D communication technology, will become the new way that alleviates eNB (base station) pressure, promotes the network performance, reduces transmission delay and improve resource utilization.

The Relay technology based on D2D communication is a further extension of D2D, and is one of the key directions for the current and subsequent standardization development, and can make full use of the advantages of D2D communication.

As shown in fig. 1, in a scenario of UE-to-Network Relay belonging to D2D communication, after a Sidelink is established between Relay UE (Relay device) and Remote UE (Remote terminal), the Relay UE and the Remote UE perform Relay communication, an UL (uplink) of the Remote UE is accessed to an eNB base station through the Relay UE, and a DL (downlink) of the Remote UE is directly connected through the eNB base station.

As shown in fig. 2, in a scenario of UE-to-Network Relay bidirectional Relay belonging to D2D communication, after a Sidelink (direct link) is established between Relay UE and Remote UE, the Relay UE and the Remote UE perform uplink and downlink Relay communication, and for UL, the Remote UE will send to the Relay UE, and for DL, the Remote UE will send to the Remote UE.

A direct link (Sidelink) is established between Relay UE and Remote UE, and in the process of Relay communication between the Relay UE and the Remote UE, for PC5UL, the Remote UE may send uplink data to the Relay UE, for PC5DL, the Relay UE may send downlink data to the Remote UE, and the Relay UE or the Remote UE always detects whether there is service data on the Sidelink, and a lot of electric power may be consumed.

Disclosure of Invention

The embodiment of the invention provides a method and a terminal for receiving data of D2D, which are used for better considering the energy saving of equipment and the balance problem of business data processing.

In a first aspect of the embodiments of the present invention, a method for receiving data by D2D is applied to Relay device of Relay UE, and the method includes:

the Relay UE equipment receives data through a sidelink direct link between the Relay UE equipment and Remote equipment of the Remote UE,

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

the Relay equipment of Relay UE starts long-period discontinuous reception, and sets a counter which counts the times of received PSCCH physical direct link control channels;

and if the timer is overtime and the counter reaches a preset threshold value in the long-period discontinuous reception, switching the Relay equipment of the Relay UE to the short-period discontinuous reception.

According to some embodiments, after the Relay UE switching to the short-period discontinuous reception step, the method further comprises:

relay equipment of Relay UE starts short-period discontinuous reception;

and according to the preset cycle times of the short-cycle discontinuous reception, if the cycle times of the short-cycle discontinuous reception are reached, switching the Relay equipment of the Relay UE to the long-cycle discontinuous reception.

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

and when the short-period discontinuous reception cycle timer is overtime, the Relay UE switching equipment is switched to long-period discontinuous reception.

relay equipment of Relay UE starts short-period discontinuous reception;

and if receiving a switching instruction sent by Remote equipment of Remote UE, switching Relay equipment of Relay UE to long-period discontinuous reception.

According to some embodiments, the first and second sensors may, in particular,

and receiving a Remote equipment of Remote UE (user equipment) of Remote equipment, and sending a switching instruction of a SL long DRX Indicator through a MAC PDU (media access control protocol) carrying LCID (logical control identity).

A second aspect of the present invention provides a method for receiving data by D2D, where the method is applied to Remote equipment of Remote UE, and the method includes:

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

the Remote equipment of the Remote UE is configured to be in a discontinuous reception state, and the discontinuous reception comprises long-period discontinuous reception and short-period discontinuous reception;

remote equipment of Remote UE starts long-period discontinuous reception, and a counter is arranged, wherein the counter counts the times of received PSCCH physical direct link control channels;

and if the timer is overtime and the counter reaches a preset threshold value in the long-period discontinuous reception, the Remote equipment of the Remote UE switches to short-period discontinuous reception.

A third aspect of the present invention provides a Relay UE Relay device in D2D, where the Relay UE Relay device includes:

a memory for storing executable instructions of the processor;

a processor; when the processor executes the executable instructions, the processor is configured to receive data by the Relay UE Relay device over a sidelink direct link with a Remote UE device, wherein the Relay UE Relay device is configured in a discontinuous reception state, and the discontinuous reception comprises long-period discontinuous reception and short-period discontinuous reception;

A fourth aspect of the present invention provides a Remote device for Remote UE in D2D, including:

a memory for storing executable instructions of the processor;

a processor; when the processor executes the executable instructions, the processor is configured to receive data from the Remote device of the Remote UE via a sidelink direct link with a Relay UE Relay device, wherein the Remote device of the Remote UE is configured in a discontinuous reception state, and the discontinuous reception includes long-period discontinuous reception and short-period discontinuous reception;

In the embodiment of the invention, based on two scenes of one-way Relay and two-way Relay of UE-to-Network Relay, a method for receiving data of D2D is provided and applied to Relay equipment of Relay UE or Remote equipment of Remote UE. The method comprises the steps that Relay UE or Remote UE is configured to be in a discontinuous receiving state, discontinuous receiving comprises long-period discontinuous receiving and short-period discontinuous receiving, wherein in the long-period discontinuous receiving state, the power consumption is saved if the sleeping time of the short-period discontinuous receiving state is longer, after the Relay UE or the Remote UE is configured to be in the discontinuous receiving state, the Relay UE or the Remote UE can be configured to be in the long-period discontinuous receiving state in a default mode, the size of the traffic is judged according to whether a timer is overtime and the numerical value of a PSCCH counter in the long-period discontinuous receiving state, if the timer is overtime and the numerical value of the PSCCH counter reaches a preset threshold value, the traffic can be considered to be relatively large, the Relay UE or the Remote UE needs to be switched to the short-period discontinuous receiving, and the relatively large traffic can be processed in time. In the embodiment of the invention, the discontinuous reception of the sidelink direct link receiving data is dynamically controlled to be switched from the long-period discontinuous reception to the short-period discontinuous reception, so that the energy saving of equipment and the balance problem of service data processing are better considered.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a D2D one-way relay;

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

fig. 3 is a diagram illustrating discontinuous reception according to an embodiment of the present invention;

fig. 4 is a schematic diagram of receiving and monitoring a PSCCH discontinuously according to an embodiment of the present invention;

fig. 5 is a schematic diagram of discontinuously receiving and monitoring 5 PSCCHs according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a drx handover period according to an embodiment of the present invention.

Fig. 7 is a schematic diagram illustrating discontinuous reception of cycles switched due to commands according to an embodiment of the present invention.

Fig. 8 is a timing diagram of a Relay UE configured in discontinuous reception according to an embodiment of the present invention.

Fig. 9 is a timing diagram of a Remote UE configured in discontinuous reception according to an embodiment of the present invention.

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

Fig. 11 is a timing diagram illustrating that a Remote UE is configured to receive discontinuously and perform periodic switching according to an embodiment of the present invention.

FIG. 12 is a timing diagram of a Relay UE configured in discontinuous reception and performing periodic handover due to an instruction according to an embodiment of the present invention.

Fig. 13 is a timing diagram illustrating a Remote UE configured in discontinuous reception and performing periodic switching due to a received command according to an embodiment of the present invention.

Fig. 14 is a flowchart of discontinuous reception configured by a Relay UE according to an embodiment of the present invention.

Fig. 15 is a flowchart illustrating that a Relay UE is configured to receive discontinuously and perform periodic switching according to an embodiment of the present invention.

Fig. 16 is a specific flowchart of an apparatus 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 in discontinuous reception and performing periodic switching due to a received instruction according to an embodiment of the present invention.

Fig. 18 is a specific flowchart of an apparatus configured to receive discontinuous reception and perform cycle switching due to receiving an instruction according to an embodiment of the present invention.

Fig. 19 is a block diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Based on two scenes of one-way Relay and two-way Relay in the UE-to-Network Relay, since the transmission of Sidelink communication traffic is typically bursty, with data transmission only for a certain period of time, most of the time, the device UE is without data interaction, if the UE continuously monitors pscch (physical downlink Control channel) subframes at this time, obviously, the power consumption is relatively large, therefore, if the UE does not continuously monitor the PSCCH (physical Sidelink Control channel) subframe, the purpose of energy saving can be achieved, and the business processing can not be influenced, therefore, in the embodiment of the present invention, the Relay UE (Relay device) can be configured as Discontinuous Reception (DRX), the Remote UE (Remote terminal) can also be configured as Discontinuous Reception (DRX), in embodiments of the present invention, DRX is for D2D direct link (Sidelink) and is therefore referred to as Sidelink DRX (SL-DRX).

Discontinuous reception (SL-DRX) of Relay UE (Relay device) is a power saving mode, which can make the Relay UE not need to enter idle mode when there is no data reception, and ensure reception of data of the Relay UE while saving power consumption.

Discontinuous reception (SL-DRX) of a Remote UE (Relay equipment) is a power-saving working mode, the Remote UE does not need to enter an idle mode when no data is received, power consumption is saved, and meanwhile, data of the Remote UE can be received, so that the synchronous state of the Remote UE and an eNB base station is ensured.

In fig. 14, step 101: the Relay equipment of the Relay UE receives data through a sidelink direct link between the Relay equipment and Remote equipment of the Relay UE, the Relay equipment of the Relay UE is configured to be in a discontinuous receiving state, and the discontinuous receiving comprises long-period discontinuous receiving and short-period discontinuous receiving.

In some embodiments of the present invention, DRX of a direct link (sildelink), namely, sildelink DRX (SL-DRX), Relay UE and Remote UE in D2D may both perform SL-DRX configuration separately or simultaneously, one SL-DRX Cycle is SLDRX-Cycle, one SL-DRX Cycle includes monitoring and sleep of UE devices, and one SL-DRX Cycle may 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: the Relay equipment of Relay UE starts long-period discontinuous reception, and sets a counter which counts the times of received PSCCH physical direct link control channels;

in some embodiments, the parameters for SL-DRX include SLDRX-onDuration timer, SLDRX-Inactivetytimer, SLDRX-Cycle, SLDRX-StartOffset, and PSCCH-Counter. The detailed definition of each parameter is as follows:

(1) SLDRX-onDurationTimer: counting from the beginning of one SL-DRX cycle, the number of subframes for continuously monitoring the PSCCH.

(2) SLDRX-inactivytytytimer: when the UE monitors the PSCCH transmitted by another UE, the timer is restarted every time the PSCCH is monitored, when the UE continues to be in the active state for the number of consecutive PSCCH subframes.

(3) SLDRX-Cycle: the number of the subframes contained in one SL-DRX Cycle comprises two Cycle parameters, namely SLSLSertDRX-Cycle and SLLongDRX-Cycle, wherein the SLSertDRX-Cycle is short and the SLLongDRX-Cycle is long, the sleep time of the SLLongDRX-Cycle is longer than that of the SLSertDRX-Cycle, so that the power consumption is more saved, and the SLLongDRX-Cycle is used in the default case.

(4) SLDRX-StartOffset: subframe position where each SL-DRX cycle starts.

If the UE currently uses the slsrhot drx-Cycle, a System Frame Number (SFN, System Frame Number) and a subframe Number (subframe Number) need to satisfy [ (SFN x 10) + subframe Number ] module (slsrhot drx-Cycle) ═ SLDRX-StartOffset (slsrhot drx-Cycle);

if the UE currently uses SLLongDRX-Cycle, the SFN and subframe number need to satisfy [ (SFN x 10) + subframe number ] module (SLLongDRX-Cycle) ═ SLDRX-StartOffset. Where the period of the SFN is 1024, each frame contains 10 subframes, the position of the starting subframe is calculated, so the SFN is multiplied by 10.

(5) PSCCH-Counter: and the PSCCH counter is used for recording the number of times of the PSCCH which is monitored. Because the SLDRX-InactivationTimer is overtime and can not reflect the size of the traffic, the embodiment of the invention can set a PSCCH counter for Relay UE or Remote UE configured with SL-DRX aiming at two scenes of unidirectional Relay and bidirectional Relay respectively, and the PSCCH counter is used for judging the size of the traffic. When the PSCCH arrives, the PSCCH counter is incremented by one to record the number of times the PSCCH arrives.

In fig. 14, step 103: if the InactivetyTimer timer is overtime and the counter reaches a preset threshold value in the long-period discontinuous reception, the Relay UE Relay equipment is switched to the short-period discontinuous reception.

When the SLDRX-inactivity timer times out, the number of times the PSCCH arrives recorded in the PSCCH-Counter is used for comparing with a preset threshold nth, and the size of the traffic volume is more accurately determined according to whether the number of times the PSCCH arrives is equal to or exceeds the threshold.

And if the SLDRX-InactivatyTimer is overtime and the PSCCH-Counter reaches a preset threshold value, the Relay UE switching equipment is switched to short-period discontinuous reception if the traffic volume is considered to be larger.

To describe various situations of the whole flow of SL-DRX in more detail, a specific embodiment 1 is listed below, in embodiment 1, values of various parameters are shown in table 1, values in table 1 are only one specific example in the embodiment, values of various parameters in the SL-DRX cycle may be configured to other values and are not limited to values in table 1, a value psf in table 1 refers to a PSCCH subframe (PSCCH subframe), a value psf1 refers to the number of subframes where a PSCCH is transmitted, and a PSCCH is transmitted as a subframe.

SL-DRX parameter	Value taking
		SLDRX-StartOffset	0
SLLongDRX-Cycle	psf 10
		SLShortDRX-Cycle	psf	5
SLDRX-onDurationTimer	psf				2
		SLDRX-InactivityTimer	psf	3

Table 1 configuration parameters for SL-DRX relate to two timers, SLDRX-onDurationTimer and SLDRX-inactivtytimer, respectively.

The SLDRX-onDurationTimer is started if the UE currently uses the SLShortDRX-Cycle and satisfies [ (SFN + 10) + subframe number ] module (SLShortDRX-Cycle) ═ SLDRX-StartOffset) module (SLShortDRX-Cycle) or the UE currently uses the SLLongDRX-Cycle and satisfies [ (SFN + 10) + subframe number ] module (SLLongDRX-Cycle) ═ SLDRX-start offset, and stopped if the timer times out;

the starting condition of the SLDRX-InactivatyTimer is to monitor the PSCCH, and the stopping condition is that the timer is overtime; when the SLDRX-InactivityTimer is overtime and the value of the PSCCH-Counter is greater than or equal to the threshold nth of the PSCCH-Counter, the traffic volume is judged to be larger, and the long period is switched to the short period.

In the scenarios of unidirectional Relay and bidirectional Relay, a Relay UE configured with SL-DRX starts SLDRX-onduration timer during On Duration and starts to monitor a PSCCH from a Remote UE, where there are two cases, one is that the PSCCH from the Remote UE is not monitored during this period, and the other is that the PSCCH from the Remote UE is monitored, specifically as follows:

1. the PSCCH from the Remote UE is not monitored;

if the PSCCH from the Remote UE is not monitored during the On Duration, go to sleep waiting for the next cycle to start to wake up again,

as shown in fig. 3, the SLLongDRX-Cycle value is psf 10, which includes 10 subframes, and is represented by 10 small rectangles in the figure, each small rectangle represents one subframe in the Cycle, where the SLDRX-onDurationTimer value is psf2, and is represented by the first 2 small rectangles with left diagonal lines, and the last 8 blank small rectangles represent the sleep state.

In the SLLongDRX-Cycle period, the first 2 subframes are used for monitoring, the last 8 subframes are used for sleeping, if the Relay UE configured with SL-DRX does not monitor the PSCCH from the Remote UE in the first 2 subframes in the period, the last 8 subframes enter the sleeping, wait for the next Cycle to start to wake up again, and repeat the period.

The PSCCH counter is 0.

2. Monitoring a PSCCH from a Remote UE;

if a PSCCH from a Remote UE is monitored during the On Duration, an SLDRX-InactivatyTimer is started and decoded during the running period of the timer, and the PSCCH from the Remote UE is monitored continuously. If the decoding is successful and the PSCCH from the Remote UE is not monitored within the timer, the timer is waited to end to switch back to the original state.

As shown in fig. 4(a), the SLLongDRX-Cycle value is psf 10, which includes 10 subframes, which is represented by 10 small rectangles, wherein the SLDRX-onDurationTimer value is psf2, which is represented by the first 2 small rectangles with left slash, during which a PSCCH from a Remote UE is monitored, i.e., a PSCCH from a Remote UE is monitored in a subframe represented by the 2 nd small rectangle in the figure, an SLDRX-inactivytimeter is started and decoded during the timer operation, wherein the SLDRX-inactivytytytytytimeter value is psf 3, which is represented by the small rectangle with right slash in the 4(a) diagram, and since the timer is started from the 2 nd small rectangle, the SLDRX-inactivytytytytytytytytytytytypter is shown from the 2 nd small rectangle to the 4 th small rectangle, which collectively represents the small rectangles 3 in fig. 4 (a).

If the decoding is successful in the running period of the timer, namely the period from the 2 nd small rectangle to the 4 th small rectangle, and the PSCCH from the Remote UE is not monitored in the timer, waiting for the end of the timer, entering the sleep state represented by the 5 th small rectangle,

and if the timer is overtime and the PSCCH counter is 1, judging whether the PSCCH counter reaches a preset threshold value, and if the preset threshold value is 3, judging that the PSCCH counter does not reach the threshold value.

In this case, if the timer is overtime but the counter does not reach the preset threshold, it is determined that the traffic volume of the Relay UE is relatively small, and the Relay UE does not need to be switched to the short-period discontinuous reception state.

Waiting for the next Cycle to start, it is still the repetition back to the original SLLongDRX-Cycle, i.e. the SLLongDRX-Cycle shown in fig. 3.

3. Monitoring two PSCCHs from Remote UE;

if a PSCCH from a Remote UE is monitored during the On Duration, an SLDRX-InactivatyTimer is started and decoded during the running period of the timer, and the PSCCH from the Remote UE is monitored continuously. The SLDRX-inactivity timer is restarted if the PSCCH from the Remote UE is heard again.

As shown in fig. 4(b), the SLLongDRX-Cycle value is psf 10, which includes 10 subframes, which is represented by 10 small rectangles, wherein the SLDRX-onDurationTimer value is psf2, which is represented by the first 2 small rectangles with left slash, during which a PSCCH from a Remote UE is monitored, i.e., a PSCCH from a Remote UE is monitored during a subframe represented by the 2 nd small rectangle in the figure, an SLDRX-inactivity timer value is started and decoded and monitored continuously during the timer operation period, wherein the SLDRX-inactivity timer value is 3, which is represented by the small rectangle with right slash in fig. 4(b), and since the timer is started from the 2 nd small rectangle, the SLDRX-inactivity timer value is represented by the 2 nd to 4 th small rectangles, which are represented by the small rectangles altogether in fig. 4 (b).

If the PSCCH from the Remote UE is monitored again during the running period of the timer, i.e. from the 2 nd small rectangle to the 4 th small rectangle, i.e. the PSCCH from the Remote UE is monitored again during the 4 th small rectangle, the SLDRX-inactivytytimer is restarted, and the restarted SLDRX-inactivytytimer is represented by 3 small rectangles from the 4 th small rectangle to the 6 th small rectangle.

Waiting for the timer to end, entering the sleep state represented by the 7 th small rectangle,

the PSCCH counter is 2.

And if the timer is overtime and the PSCCH counter is 2, judging whether the PSCCH counter reaches a preset threshold value, and if the preset threshold value is 3, judging that the PSCCH counter does not reach the threshold value.

4. Monitoring more PSCCH from Remote UE to cause the timer to time out;

if a PSCCH from a Remote UE is monitored during the On Duration, an SLDRX-InactivatyTimer is started and decoded during the running period of the timer, and the PSCCH from the Remote UE is monitored continuously. If the PSCCH from the Remote UE is monitored again, the SLDRX-InactivationTimer is started for the second time and decoded during the running period of the timer started for the second time, and the PSCCH from the Remote UE is continuously monitored and circulated.

As shown in fig. 5, the SLLongDRX-Cycle value is psf 10, which includes 10 subframes, which are indicated by 10 small rectangles in the figure, wherein the SLDRX-onDurationTimer value is psf2, which is indicated by the first 2 small rectangles with left-diagonal lines in the figure, during which a PSCCH from a Remote UE is monitored, i.e., a PSCCH from a Remote UE is monitored in a subframe indicated by the 2 nd small rectangle in the figure, an SLDRX-inactivity timer is started and decoded and continues to monitor the PSCCH during the timer operation period, wherein the SLDRX-inactivity timer value is psf 3, which is indicated by the small rectangles with right-diagonal lines in fig. 5, and since the timer is started from the 2 nd small rectangle, the SLDRX-inactivity timer value is indicated by the small rectangles from the 2 nd to 4 th small rectangles in fig. 5.

If the PSCCH from the Remote UE is monitored again during the running period of the timer, i.e. from the 2 nd small rectangle to the 4 th small rectangle, i.e. the PSCCH from the Remote UE is monitored again during the 4 th small rectangle, the SLDRX-inactivity timer is started for the second time, and the SLDRX-inactivity timer started for the second time is represented by 3 small rectangles from the 4 th small rectangle to the 6 th small rectangle.

If the PSCCH from the Remote UE is monitored for the third time during the running period of the timer started for the second time, i.e. from the 4 th small rectangle to the 6 th small rectangle, i.e. the PSCCH from the Remote UE is monitored for the second time during the 6 th small rectangle, the SLDRX-inactivity timer is started for the third time, and the SLDRX-inactivity timer started for the third time is represented by 3 small rectangles from the 6 th small rectangle to the 8 th small rectangle.

If the PSCCH from the Remote UE is monitored for the fourth time during the running period of the timer started for the third time, i.e. from the 6 th small rectangle to the 8 th small rectangle, i.e. the PSCCH from the Remote UE is monitored for the 8 th small rectangle, the SLDRX-inactivytimer is started for the fourth time, and the SLDRX-inactivytimer started for the fourth time is represented by 3 small rectangles from the 8 th small rectangle to the 10 th small rectangle.

If the PSCCH from the Remote UE is monitored for the fifth time during the timer running period of the fourth start, i.e. from the 8 th small rectangle to the 10 th small rectangle, i.e. the PSCCH from the Remote UE is monitored for the 10 th small rectangle, the SLDRX-inactivytytimer is caused to be started for the fifth time according to the triggering rule,

according to the SLDRX-InactivationTimer started for the fifth time caused by the trigger rule, if the timer is to run out, the current cycle of the SL-DRX is exceeded, and the SLDRX-InactivationTimer is overtime.

And if the timer is overtime and the PSCCH counter is 5, judging whether the PSCCH counter reaches a preset threshold value, and if the preset threshold value is 3, judging that the PSCCH counter reaches the threshold value.

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

5. Decoding failure, resulting in timer timeout

When the SLDRX-inactivity timer is started, decoding is required during the running period of the timer, and if the decoding fails, the SLDRX-inactivity timer times out.

If a PSCCH is monitored during the On Duration and decoding fails, the timer is overtime, the PSCCH counter is 1, whether the PSCCH counter reaches a preset threshold value is judged, and if the preset threshold value is 3, the PSCCH counter does not reach the threshold value.

If a PSCCH is monitored during the On Duration, this PSCCH decoding is successful, but the second PSCCH decoding fails, the SLDRX-inactivytimer timer times out.

Under the condition, the timer is overtime, the PSCCH counter is 2, whether the PSCCH counter reaches a preset threshold value or not is judged, and if the preset threshold value is 3, the PSCCH counter does not reach the threshold value.

As shown in FIG. 8, the eNB configures SL-DRX for the Relay UE, which is a timing diagram for long-period discontinuous reception.

FIG. 8, step 1: the eNB configures SL-DRX for the Relay UE, and specifically, the eNB base station sends RRC MAC-MainConfig to the Relay UE.

FIG. 8, step 2: starting the SL-DRX period from the position conforming to the initial subframe by the Relay UE, firstly entering On Duration, and starting monitoring the PSCCH by the Relay UE;

FIG. 8, step 3: receiving PSCCH of Remote UE, and adding 1 to a PSCCH-Counter;

FIG. 8, step 4: starting the SLDRX-InactivatyTimer, decoding and continuing monitoring until the SLDRX-InactivatyTimer is overtime;

FIG. 8, step 5: obtaining the arrival times n counted by the current PSCCH-Counter, judging whether n is greater than or equal to nth, and if not, judging that the traffic is small;

FIG. 8, step 6: the Relay UE continues to use long-period discontinuous reception.

As shown in fig. 9, eNB configures SL-DRX for Remote UE, which is a timing diagram for long-cycle discontinuous reception.

FIG. 9, step 1: the eNB configures SL-DRX for the Remote UE, and specifically, the eNB base station sends RRC MAC-MainConfig to the Remote UE.

FIG. 9, step 2: the Remote UE starts the SL-DRX period from the position conforming to the initial subframe, firstly enters the On Duration, and starts monitoring the PSCCH;

FIG. 9, step 3: receiving PSCCH of Relay UE, and adding 1 to PSCCH-Counter of Remote UE;

FIG. 9, step 4: starting the SLDRX-InactivatyTimer, decoding and continuing monitoring until the SLDRX-InactivatyTimer is overtime;

FIG. 9, step 5: obtaining the arrival times n counted by the current PSCCH-Counter, judging whether n is greater than or equal to nth, and if not, judging that the traffic is small;

FIG. 9, step 6: the Remote UE continues to use long-period discontinuous reception.

In embodiment 1, after the device is configured to receive discontinuously, the device may be configured to a long-cycle discontinuous reception state by default, and the size of the traffic is determined according to whether the SLDRX-inactivity timer is expired and the value of the PSCCH counter in the long-cycle discontinuous reception state, and if the SLDRX-inactivity timer is expired and the value of the PSCCH counter reaches a preset threshold, it may be determined that the traffic is relatively large and the device needs to be switched to short-cycle discontinuous reception, so that the relatively large traffic is processed in time. In embodiment 1 of the present invention, the discontinuous reception of the sidelink direct link is dynamically controlled to switch from the long-period discontinuous reception to the short-period discontinuous reception, so that the energy saving of the device and the balance of the service data processing are achieved.

In embodiment 2, the device may revert from the short-period discontinuous reception to the long-period discontinuous reception again in such a manner that the number of times of the short-period discontinuous reception is reached, and automatically switch to the long-period discontinuous reception.

Step 104 in FIG. 15: relay equipment of Relay UE starts short-period discontinuous reception; and according to the preset cycle times of the short-cycle discontinuous reception, if the cycle times of the short-cycle discontinuous reception are reached, switching the Relay equipment of the Relay UE to the long-cycle discontinuous reception.

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

SLDRX-ShortCycleTimer: this value is a multiple of the SLShortDRX-Cycle and represents the total frame length over which the SLShortDRX-Cycle can operate.

SL-DRX parameter	Value taking
		SLDRX-StartOffset	0
SLLongDRX-Cycle	psf 10
		SLShortDRX-Cycle	psf	5
SLDRX-onDurationTimer	psf				2
		SLDRX-InactivityTimer	psf	3
SLDRX-ShortCycleTimer	3

TABLE 2

The Relay UE Relay equipment starts short-period discontinuous reception, starts to use SLSHhot DRX-Cycle and starts SLDRX-ShortCyclertimer, and the configuration of the SLDRX-ShortCyclertimer is 3, so when the short-period discontinuous reception Cycle is 3 times, the timer is overtime, and the SLDRX-ShortCyclertimer stops. The Relay UE Relay device switches back to long period discontinuous reception.

As shown in fig. 6, the device starts short-Cycle discontinuous reception, i.e. slsrortdrx-Cycle, in fig. 6, one slsrortdrx-Cycle has 5 subframes, and the first 2 subframes monitor, i.e. the first 2 subframes are On Duration, which is the same as the monitoring of long-Cycle discontinuous reception, and the last 3 subframes of short-Cycle discontinuous reception sleep, when the device starts to use slsrortdrx-Cycle, it needs to start SLDRX-shorttimetimetimer, and the SLDRX-shorttimetimer configuration is 3, then when the short-Cycle discontinuous reception Cycle is 3 times, in fig. 6, the 5 subframes represented by slsrortdrx-Cycle circulate have been cycled for 3 times, and then the timer times out, and the SLDRX-shortcycle stops. The Relay UE Relay device returns to long period discontinuous reception, i.e. 10 subframes represented by SLLongDRX-Cycle in fig. 6.

As shown in FIG. 10, the eNB configures SL-DRX for a Relay UE that receives on long-cycle discontinuous and switches to a timing diagram for short-cycle discontinuous reception.

FIG. 10, step 1: the eNB configures SL-DRX for the Relay UE, and specifically, the eNB base station sends RRC MAC-MainConfig to the Relay UE.

FIG. 10, step 2: starting the SL-DRX period from the position conforming to the initial subframe by the Relay UE, firstly entering On Duration, and starting monitoring the PSCCH by the Relay UE;

FIG. 10, step 3: receiving PSCCH of Remote UE, and adding 1 to a PSCCH-Counter;

FIG. 10, step 4: starting the SLDRX-InactivatyTimer, decoding and continuing monitoring until the SLDRX-InactivatyTimer is overtime;

FIG. 10, step 5: acquiring the arrival times n counted by a current PSCCH-Counter, judging whether n is greater than or equal to nth or not, and if yes, judging that the traffic is large;

FIG. 10, step 6: the Relay UE switches to the short periodic discontinuous reception, SLSLSerrtDRX-Cycle, and starts SLDRX-ShortCyclerTimer.

FIG. 10, step 7: when 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 a Remote UE that receives on long-cycle discontinuous reception and switches to short-cycle discontinuous reception.

FIG. 11, step 1: the eNB configures SL-DRX for the Remote UE, and specifically, the eNB base station sends RRC MAC-MainConfig to the Remote UE.

FIG. 11, step 2: the Remote UE starts the SL-DRX period from the position conforming to the initial subframe, firstly enters the On Duration, and starts monitoring the PSCCH;

FIG. 11, step 3: receiving PSCCH of Relay UE, and adding 1 to PSCCH-Counter of Remote UE;

FIG. 11, step 4: the Remote UE starts an SLDRX-InactivatyTimer, decodes and continues monitoring until the SLDRX-InactivatyTimer is overtime;

FIG. 11, step 5: acquiring the arrival times n counted by a current PSCCH-Counter, judging whether n is greater than or equal to nth or not, and if yes, judging that the traffic is large;

FIG. 11, step 6: the Remote UE switches to the short-period discontinuous reception, SLSHHortDRX-Cycle, and starts SLDRX-ShortCyclerTimer.

FIG. 11, step 7: when SLDRX-ShortCycleTimer times out, the Remote UE switches back to long period discontinuous reception.

As shown in fig. 16, a specific flowchart of the device configured for discontinuous reception and performing periodic switching is shown.

By adopting the embodiment 2, the SLSerrtDRX-Cycle execution times depend on the SLDRX-ShortCyclerTimer, and after the parameter SLDRX-ShortCyclerTimer is set, the SLLongDRX-Cycle can be automatically switched back, the system overhead is low, and the equipment can return to the long-period discontinuous reception with lower power consumption as soon as possible.

In embodiment 3, the device may revert to the long-period discontinuous reception from the short-period discontinuous reception again, and the method is to receive a handover instruction sent by Remote equipment of the Remote UE, and switch to the long-period discontinuous reception.

As shown in fig. 17, step 105: relay equipment of Relay UE starts short-period discontinuous reception; and if receiving a switching instruction sent by Remote equipment of Remote UE, switching Relay equipment of Relay UE to long-period discontinuous reception.

In some embodiments, the control signaling parameter for dynamically indicating the SL-DRX cycle configuration switching is an SL long DRX Indicator, and the control signaling for SL-DRX cycle switching is dynamically issued by the Remote UE to indicate the Relay UE to perform long cycle switching.

The control signaling SL long DRX Indicator can be represented by a MAC PDU subheader carrying LCID. Its corresponding LCID is characterized to the SL-SCH, as shown in table 3 below, assigned to the LCID of the existing SL-SCH,

TABLE 3 Values of LCID for SL-SCH (now configurable)

In some embodiments, the SL long DRX Indicator is placed at LCID for SL-SCH at a position of 11011, which is the assignment of the SL long DRX Indicator to LCID for SL-SCH as shown in Table 4.

Index	LCID values
		11011	SL long DRX Indicator

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

The Relay UE starts short-period discontinuous reception and works in an SLSLSLRhot DRX-Cycle, when the traffic of the Relay UE is less, the SL-DRX Command MAC control element sends an SL long DRX Indicator to the Relay UE, the instruction represents that the downlink traffic of the Relay UE is less at the moment, and the Relay UE switches to the SLLong DRX-Cycle when the next subframe meeting the initial condition after receiving the SL long DRX Indicator.

As shown in fig. 7, the device starts short-Cycle discontinuous reception, i.e., SLShortDRX-Cycle, in fig. 7, one SLShortDRX-Cycle has 5 subframes, and monitors the first 2 subframes, i.e., the first 2 subframes are On Duration, which is the same as the monitoring of long-Cycle discontinuous reception, and sleeps the last 3 subframes of short-Cycle discontinuous reception, and when the device uses SLShortDRX-Cycle, it determines whether to receive a SL long DRX Indicator, and when receiving the SL long DRX Indicator, it switches to the sllong DRX-Cycle when the next subframe meets the initial condition. In fig. 7, SLShortDRX-Cycle 2 nd Cycle, the SL long DRX Indicator is monitored during On Duration. The device returns to long-period discontinuous reception after the end of this 2 nd Cycle, i.e. 10 subframes represented by SLLongDRX-Cycle in fig. 7.

As shown in FIG. 12, the eNB configures SL-DRX for a Relay UE that receives on long-cycle discontinuous and switches to timing diagram for short-cycle discontinuous reception due to receiving an instruction.

FIG. 12 step 1: the eNB configures SL-DRX for the Relay UE, and specifically, the eNB base station sends RRC MAC-MainConfig to the Relay UE.

FIG. 12, step 2: starting the SL-DRX period from the position conforming to the initial subframe by the Relay UE, firstly entering On Duration, and starting monitoring the PSCCH by the Relay UE;

fig. 12, step 3: receiving PSCCH of Remote UE, and adding 1 to a PSCCH-Counter;

FIG. 12, step 4: starting SLDRX-InactivityTimer, decoding and continuing monitoring until

SLDRX-inactivytytytimer times out;

FIG. 12, step 5: acquiring the arrival times n counted by a current PSCCH-Counter, judging whether n is greater than or equal to nth or not, and if yes, judging that the traffic is large;

FIG. 12, step 6: the Relay UE switches to the short periodic discontinuous reception, SLSLShortDRX-Cycle.

FIG. 12, step 7: when receiving a SL Long DRX Indicator sent by Remote UE, the Relay UE switches back to Long-period discontinuous reception.

As shown in fig. 13, the eNB configures SL-DRX for a Remote UE that receives on long-cycle discontinuous reception and switches to a timing diagram for short-cycle discontinuous reception due to receiving an instruction.

FIG. 13, step 1: the eNB configures SL-DRX for the Remote UE, and specifically, the eNB base station sends RRC MAC-MainConfig to the Remote UE.

FIG. 13, step 2: the Remote UE starts the SL-DRX period from the position conforming to the initial subframe, firstly enters the On Duration, and starts monitoring the PSCCH;

FIG. 13, step 3: receiving PSCCH of Relay UE, and adding 1 to PSCCH-Counter of Remote UE;

FIG. 13, step 4: the Remote UE starts an SLDRX-InactivatyTimer, decodes and continues monitoring until the SLDRX-InactivatyTimer is overtime;

FIG. 13, step 5: acquiring the arrival times n counted by a current PSCCH-Counter, judging whether n is greater than or equal to nth or not, and if yes, judging that the traffic is large;

FIG. 13, step 6: the Remote UE switches to the short periodic discontinuous reception, SLSLShortDRX-Cycle.

FIG. 13, step 7: when receiving a SL Long DRX Indicator sent by Relay UE, the Relay UE switches back to Long-period discontinuous reception.

As shown in fig. 18, a specific flowchart of the device configured for discontinuous reception and performing periodic switching is shown.

By adopting the embodiment 3, the Relay UE can dynamically know the size of the traffic from the Remote UE, and can switch back to the SLLongDRX-Cycle from the SLShortDRX-Cycle after receiving the instruction, and can meet the requirement of the traffic.

Based on the same inventive concept, the embodiment of the present invention further provides an electronic device, and as the method corresponding to the device is the discontinuous reception method in the embodiment of the present invention, and the principle of the device to solve the problem is similar to the method, the implementation of the device may refer to the implementation of the above method, and repeated details are not repeated.

As shown in fig. 19, an embodiment of the present invention provides an electronic device, which includes a transceiver 401, a central processing unit 402, a memory 403, an antenna 404 connected to the transceiver 401, a peripheral interface 405 connected to the central processing unit, and a power supply system 406 for supplying power to the electronic device.

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

a memory for storing executable instructions of the processor;

In some embodiments, there is provided a Remote device for Remote UE in D2D, including:

a memory for storing executable instructions of the processor;

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for receiving data by D2D, applied to Relay equipment of Relay UE, comprising:

the Relay equipment of the Relay UE receives data through a sidelink direct link between the Relay equipment of the Relay UE and Remote equipment of the Relay UE, the Relay equipment of the Relay UE is configured to be in a discontinuous receiving state, and the discontinuous receiving comprises long-period discontinuous receiving and short-period discontinuous receiving;

the Relay equipment of Relay UE starts long-period discontinuous reception, and sets a PSCCH counter, wherein the PSCCH counter counts the times of receiving a PSCCH physical direct link control channel sent by Remote UE, and is used for judging the traffic volume sent by the Remote UE to Relay UE;

and if the InactivtyTimer timer is overtime and the PSCCH counter reaches a preset threshold value in the long-period discontinuous reception, switching the Relay UE to short-period discontinuous reception.

2. The method of claim 1, wherein after the Relay UE relaying device switching to the short-period discontinuous reception step, further comprising:

relay equipment of Relay UE starts short-period discontinuous reception;

3. The method according to claim 2, characterized in that it comprises in particular:

the Relay equipment of the Relay UE starts the short-period discontinuous reception, and sets an SLDRX-ShortCycleTimer short-period discontinuous cycle timer to be 3;

4. The method of claim 1, wherein after the Relay UE relaying device switching to the short-period discontinuous reception step, further comprising:

relay equipment of Relay UE starts short-period discontinuous reception;

5. The method according to claim 4, wherein the receiving of the handover command sent by the Remote equipment of the Remote UE, specifically,

6. A method for receiving data by D2D, applied to Remote equipment of a Remote UE, comprising:

remote equipment of Remote UE starts long-period discontinuous reception, and sets a PSCCH counter, wherein the PSCCH counter counts the times of receiving a PSCCH physical direct link control channel sent by the Relay UE and is used for judging the traffic volume sent to the Relay UE by the Relay UE;

and if the InactivtyTimer timer is overtime and the PSCCH counter reaches a preset threshold value in the long-period discontinuous reception, the Remote equipment of the Remote UE is switched to short-period discontinuous reception.

7. The method of claim 6, wherein after the Remote device of the Remote UE switches to the short-period discontinuous reception step, further comprising:

remote equipment of Remote UE starts short-period discontinuous reception;

and according to the preset cycle times of the short-cycle discontinuous reception, if the cycle times of the short-cycle discontinuous reception are reached, the Remote equipment of the Remote UE is switched to the long-cycle discontinuous reception.

8. The method of claim 6, wherein after the Remote device of the Remote UE switches to the short-period discontinuous reception step, further comprising:

remote equipment of Remote UE starts short-period discontinuous reception;

and if receiving a switching instruction sent by Relay equipment of Relay UE, switching Remote equipment of the Relay UE to long-period discontinuous reception.

9. A Relay UE Relay device in D2D, comprising:

a memory for storing executable instructions of the processor;

10. A Remote UE device for Remote UE in D2D, comprising:

a memory for storing executable instructions of the processor;