CN113517961A - Discontinuous reception feedback timing method and device - Google Patents
Discontinuous reception feedback timing method and device Download PDFInfo
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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Abstract
The application discloses a discontinuous reception feedback timing method and equipment, which are applied to side link communication, wherein when feedback information SFCI is NACK when a receiving terminal receives discontinuously, a first timer is started, when the first timer is overtime, a second timer is started, and the receiving terminal monitors a retransmission data packet during the starting period of the second timer; the duration of the first timer is selected from one of the following values: sending the duration of channel interception when a terminal triggers resource selection; a time interval between the retransmission resource and the PSFCH resource of the previous feedback HARQ; receiving a time interval between PSFCH resources fed back by a terminal HARQ and an activation state configured by discontinuous reception after the resources; and the transmitting terminal receives the PSFCH resource fed back by the HARQ and the time interval between the PSFCH resource and the activation state of the discontinuous reception configuration after the resource. The scheme of the application avoids the problem that the receiving terminal starts the drx retransmission timer too early to increase power cost or starts the drx retransmission timer too late to prolong the data packet transmission delay.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a discontinuous reception feedback timing method and device.
Background
The discontinuous reception technology is only used in a cellular system at present, and a drx-HARQ cycle time timer corresponding to uplink and downlink communication between a base station and a terminal is configured semi-statically through high-level RRC signaling and is a fixed value.
The length of the drx-HARQ cycle time timer is related to the delay of the terminal listening to the channel for acquiring the retransmission resource in the side link communication, and the method of configuring a semi-static fixed value for the timer in the conventional cellular communication may cause the terminal to prematurely start the drx retransmission timer and increase power overhead, or too late start the drx retransmission timer and prolong the data packet transmission delay.
While the semi-static configuration method is not suitable for edge link communication. There is currently no solution on how drx-HARQ cycle time timers on the edge links are configured.
The invention provides a method for configuring a drx-HARQ cycle time timer in edge link communication, which is used for solving the problems.
Disclosure of Invention
The method avoids the problem that a fixed value is configured for a drx-HARQ cycle time timer in a semi-static mode in the traditional cellular communication, so that a receiving terminal starts the drx retransmission timer too early to increase power cost or starts the drx retransmission timer too late to prolong data packet transmission delay, and is particularly suitable for side link communication.
In a first aspect, the present application provides a discontinuous reception feedback timing method, which is applied in side link communication, when a receiving terminal performs discontinuous reception and feedback information SFCI of the receiving terminal is NACK, a first timer is started, when the first timer is overtime, a second timer is started, and the receiving terminal listens to a retransmission data packet during the starting period of the second timer; the duration of the first timer is one of the following duration values:
a first time duration T1, which is a time duration for the sending terminal to perform channel sensing when triggering resource selection;
a second duration T2, which is a time interval between the retransmission resource and the PSFCH resource of the previous feedback HARQ;
a third duration T3, which is a time interval between the PSFCH resource fed back by the HARQ of the receiving terminal and an active state configured for discontinuous reception after the resource;
a fourth time duration T4, which is the time interval between the PSFCH resource for the transmitting terminal to receive HARQ feedback and the active state configured for discontinuous reception after the resource.
Preferably. The duration of the timer is selected according to one of the following rules:
min(T1,T2)；max(T1,T3)；max(T1,T4)；max(T1,T3,T4)；min(max(T1,T3),T2)；min(max(T1,T4),T2)；min(max(T1,T3,T4),T2)。
preferably, the receiving terminal obtains the indication information for determining the duration of the first timer; the acquisition mode of the indication information is at least one of the following modes: and sending a terminal notification, a base station notification and a system default configuration. Further preferably, the indication information is used to indicate at least one of a first duration, a second duration, a third duration, and a fourth duration; preferably, the indication information includes a channel sensing duration-related configuration parameter, for example, a parameter indicating a channel sensing mode of the side link communication transmitting terminal.
Further preferably, when the indication information includes a first duration, the receiving terminal compares the first duration with at least one of a second duration, a third duration, and a fourth duration, respectively, and determines that the duration of the first timer is at least one of the following: min (T1, T2); max (T1, T3); max (T1, T4); max (T1, T3, T4); min (max (T1, T3), T2); min (max (T1, T4), T2); min (max (T1, T3, T4), T2).
In a second aspect, the present application further provides a network device, configured to implement the method in any one of the embodiments of the first aspect of the present application, where the network device is configured to send indication information; the indication information is used for indicating at least one of the first duration, the second duration, the third duration and the fourth duration.
In a third aspect, the present application further provides a terminal device, configured to implement the method in any embodiment of the first aspect of the present application, where the terminal device is used as the receiving terminal and/or the sending terminal.
In the apparatus of the second aspect and the third aspect, the present application also proposes a communication device, including: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of the embodiments of the first aspect of the application.
In a fourth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the first aspect of the present application.
In a fifth aspect, the present application further provides a mobile communication system, including at least one network device according to any embodiment of the present application and/or at least one terminal device according to any embodiment of the present application.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the scheme of the application reduces the invalid working time of the timer and reduces the power overhead; meanwhile, the scheme of the application can furthest ensure that the retransmission data packet is received in time and avoid retransmission again.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a side-link communication receiving terminal timer;
fig. 2(a) is a schematic diagram of a transmitting terminal selecting a retransmission resource to transmit a retransmission data packet;
fig. 2(b) is a schematic diagram of a transmitting terminal transmitting a retransmitted data packet after channel sensing;
FIG. 3 is a flow chart of an embodiment of the method of the present invention;
FIG. 4 is a schematic diagram of an embodiment of starting a timer according to a first duration;
FIG. 5 is a schematic diagram of an embodiment of starting a timer according to a second duration;
FIG. 6 is a schematic diagram of an embodiment of starting a timer according to a third duration;
FIG. 7 is a schematic diagram of an embodiment of a start timer according to a fourth duration;
FIG. 8 is a schematic diagram of an embodiment of a network device;
FIG. 9 is a schematic diagram of an embodiment of a terminal device;
fig. 10 is a schematic structural diagram of a network device according to another embodiment of the present invention;
fig. 11 is a block diagram of a terminal device of another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
The invention provides a discontinuous reception feedback timing method and equipment, which are applied to side link communication. The method is mainly characterized in that a receiving terminal acquires a channel listening duration related configuration parameter of a sending terminal, and associates a drx-HARQ (hybrid automatic repeat request) cycle time timer which is received discontinuously with the channel listening duration of the sending terminal.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a prior art side link communication receiving terminal timer.
In the existing edge link communication, if a discontinuous reception technology similar to that between a terminal and a base station is applied, when the terminal does not successfully detect a data packet and needs to wait for Retransmission of the data packet, an HARQ process for receiving and detecting the data packet needs to start a drx-HARQ cycle time timer (drx-HARQ-RTT-timer), and after the timer expires, the drx-Retransmission timer is started, and when the drx Retransmission timer works, the terminal is in an active state to prepare for receiving and detecting the retransmitted data packet. For example, as shown in fig. 1, assuming that side link SL communication is taken as an example, the SL transmitting terminal UE _ TX transmits data to the receiving terminal UE _ RX, and UE _ RX is not successfully detected, and when the corresponding feedback information SFCI is NACK, first, a drx-HARQ cycle time timer is started, and after the timer expires, a drx retransmission timer is started to receive and detect retransmission data. The duration parameter of the drx-HARQ cycle time timer is related to the transmission delay between the receiving terminal and the transmitting terminal, and the delay from the receiving of the HARQ feedback information by the transmitting terminal to the transmission of the retransmitted data packet.
Fig. 2(a) is a schematic diagram of a transmitting terminal selecting a retransmission resource to transmit a retransmission data packet according to the prior art, and fig. 2(b) is a schematic diagram of a transmitting terminal transmitting a retransmission data packet after channel sensing according to the prior art. In the side link communication, when a transmitting terminal operates in a mode of autonomously selecting resources and retransmission resources are not reserved after HARQ feedback, the retransmission resources need to be reacquired through channel sensing. The time for acquiring retransmission resources in different channel sensing modes is different. When the listening mode in (a) is adopted, the sending terminal triggers retransmission resource selection after receiving the NACK feedback, and directly selects retransmission resources in a subsequent resource selection window, and at this time, the channel listening duration for the sending terminal to acquire the retransmission resources may not be considered in the configuration parameters of the drx-HARQ cycle time timer. And when the interception mode in (b) is adopted, the sending terminal triggers retransmission resource selection after receiving NACK feedback, selects retransmission resources in a resource selection window after experiencing channel interception time length (TS), and at the moment, the channel interception time length TS for acquiring the retransmission resources by the sending terminal needs to be considered in configuration parameters of a drx-HARQ cycle time timer. No specific solution for designing drx-HARQ cycle time timer in side link communication exists in the prior art
FIG. 3 is a flow chart of an embodiment of the method of the present invention.
The application provides a discontinuous reception feedback timing method, which is applied to side link communication, when a receiving terminal receives discontinuously and feedback information SFCI of the receiving terminal is NACK, a first timer (for example, a drx-HARQ cycle time timer) is started, when the first timer is overtime, a second timer (for example, a drx retransmission timer) is started, and the receiving terminal listens to a retransmission data packet during the starting period of the second timer. In the method, the duration of a first timer is associated with the channel listening duration of a sending terminal, and the method specifically comprises the following steps:
Specifically, in this step, the channel sensing duration related configuration parameters at least include the following parameters: and sending the channel sensing mode and/or the first time length of the terminal.
The channel sensing mode of the sending terminal comprises full sensing (full sensing), random selection (random selection), partial sensing (partial sensing), continuous partial sensing (continuous partial sensing) and the like. The full sensing is that the transmitting terminal is in a state of continuous channel sensing at other time except for the time that the transmitting terminal needs to transmit data. The random selection, i.e. the sending terminal, does not directly select the data transmission resources by listening. The partial interception selects resources associated with the candidate resources for the transmitting terminal to perform channel interception. The persistent part listens for the terminal to trigger the selection of resources and then listens for the first duration and then selects transmission data transmission resources.
The first time length is the continuous partial listening time length. Further, random selection and persistent partial sensing may be used as a channel sensing method, that is, random selection may be regarded as a specific persistent partial sensing with a first duration of 0.
The full interception and the partial interception can also be applied in combination with the continuous partial interception, that is, the terminal adopts a full interception or partial interception mode before triggering resource selection, and continuously intercepts for a first time after triggering resource selection and then selects transmission data transmission resources.
The method for the receiving terminal to obtain the relevant configuration parameters of the channel listening duration of the sending terminal comprises at least one of the following methods or a combination of the following methods: and sending a terminal notification, a base station notification and a system default configuration. In the sending terminal notification mode, the sending terminal may specifically send the sending terminal to the receiving terminal by carrying the relevant configuration parameters of the channel sensing duration of the sending terminal through the PSCCH or the PSCCH. In the base station notification mode, the base station may specifically send the configuration parameters related to the channel sensing duration of the terminal to the receiving terminal through the PDCCH or PDSCH bearer. In the default configuration mode of the system, the configuration parameters related to the listening duration of the channel of the sending terminal can be specifically configured in a mode of writing through equipment according to protocol convention. When the default configuration of the system and the terminal notification are simultaneously supported, the terminal notification is sent as the basis.
Further, the channel listening mode of the sending terminal and the corresponding listening duration related configuration parameter may be bound to the transmission priority and/or the transmission resource pool parameter, and when the receiving terminal learns the current service transmission priority or the resource pool used for transmission, the channel listening mode of the sending terminal and the corresponding listening duration related configuration parameter may be learned.
102, the receiving terminal starts a corresponding timer according to the channel interception mode of the sending terminal under the discontinuous reception.
Specifically, in this step, when the receiving terminal starts the first timer under discontinuous reception, the value of the first timer is related to the channel listening duration of the transmitting end in step 101. The first timer is a drx-HARQ cycle time timer, and is used for starting a second timer when the timer is overtime, and the receiving terminal listens for the retransmitted data packet during the starting period of the second timer.
Specifically, the specific method for the first timer value to be related to the channel listening duration of the sending terminal may be different under the limiting condition that the sending terminal sends the retransmission data packet and the receiving terminal receives the retransmission data packet.
The duration of the first timer is one of the following duration values:
a first time duration T1, which is a time duration for the sending terminal to perform channel sensing when triggering resource selection;
a second duration T2, which is a time interval between the retransmission resource and the PSFCH resource of the previous feedback HARQ;
a third duration T3, which is a time interval between the PSFCH resource fed back by the HARQ of the receiving terminal and an active state configured for discontinuous reception after the resource;
a fourth time duration T4, which is the time interval between the PSFCH resource for the transmitting terminal to receive HARQ feedback and the active state configured for discontinuous reception after the resource.
That is, one of the following duration values is selected as the duration of the first timer:
T1，T2，T3，T4。
preferably, the duration of the timer is selected according to one of the following rules:
min(T1,T2)；max(T1,T3)；max(T1,T4)；max(T1,T3,T4)；min(max(T1,T3),T2)；min(max(T1,T4),T2)；min(max(T1,T3,T4),T2)。
optionally, the embodiment of the present application may further include the following steps:
and step 103, configuring a new interception time length.
And adjusting the value of the first duration, specifically, comparing the first duration with the third duration and the fourth duration respectively, and adjusting the value of the first duration according to the comparison result so that the first duration is not less than at least one of the third duration and the fourth duration.
For example,
the first duration is configured to be max (T1, T3), i.e. when the third duration is longer than the original first duration, the first duration may be adjusted to the third duration. Or,
the first duration is configured to be max (T1, T4), i.e. when the fourth duration is longer than the original first duration, the first duration may be adjusted to the fourth duration. Or,
the first time length is configured to be max (T1, T3, T4), that is, when the fourth time length or the third time length is greater than the original first time length, the first time length can be adjusted to be the maximum value between the third time length and the fourth time length, that is, max (T3, T4).
It should be noted that step 102 and step 103 of this embodiment have no order relationship. The steps 101 to 103 can be alternatively executed circularly.
It should be further noted that, when the values of the third duration and the fourth duration are used to adjust the first duration, the method for determining the first timer duration in step 102 in this application is equivalent to:
the duration of the first timer is one of the following duration values:
a first time duration T1, which is a time duration for the sending terminal to perform channel sensing when triggering resource selection;
the second duration T2 is the time interval between the retransmission resource and the PSFCH resource of the previous feedback HARQ.
Wherein the value of the first duration is not less than at least one of the third duration and the fourth duration.
Preferably, the duration of the timer may be selected according to the following rule: min (T1, T2).
Fig. 4 is a schematic diagram of an embodiment of starting a timer according to a first duration.
Example 1: when a transmitting terminal receives NACK feedback to retransmit data, the transmitting terminal directly monitors a channel to select retransmission resources to transmit the retransmitted data; and it is not limited that the receiving terminal can still start the second timer to listen to the retransmitted data packet in the non-activated state of the discontinuous reception configuration when the receiving terminal receives the retransmitted data packet in the activated state of the discontinuous reception configuration. At this time, the first timer configuration duration is the first duration.
Fig. 5 is a schematic diagram of an embodiment of starting a timer according to a second duration.
Further, if the transmitting terminal already reserves the retransmission resource for the retransmission data fed back by the NACK, it is assumed that the second duration is an interval between the retransmission resource and the PSFCH resource fed back by the previous HARQ. The first timer configuration duration is the second duration, or the minimum value of the second duration and the first duration, i.e., min (the first duration, the second duration). In this example, the first timer is configured to have a second duration.
Fig. 6 is a schematic diagram of an embodiment of starting a timer according to a third duration.
Example 2: when a transmitting terminal receives NACK feedback to retransmit data, the transmitting terminal directly monitors a channel to select retransmission resources to transmit the retransmitted data; and the receiving terminal is limited to receive the retransmission data packet in the activated state of the discontinuous reception configuration, namely the receiving terminal can start the second timer to listen to the retransmission data packet in the activated state of the discontinuous reception configuration.
The third duration is assumed to be a time interval between the PSFCH resource fed back by the HARQ of the receiving terminal and an active state of the discontinuous reception configuration after the resource.
At this time, the first timer configuration period is a maximum value between the first period and the third period, i.e., max (T1, T3). Further, if the retransmission data fed back by the NACK by the sending terminal has reserved retransmission resources, the first timing configuration duration is the second duration, or min (max (T1, T3), T2). Further alternatively, the first duration may be configured to be max (T1, T3), i.e. when the third duration is greater than the original first duration, the first duration may be adjusted to the third duration.
Fig. 7 is a schematic diagram of an embodiment of starting a timer according to a fourth duration.
Example 3: when a sending terminal receives NACK feedback and needs to retransmit data, a sending terminal is configured to work in a DRX state, and the sending terminal needs to send the retransmitted data in a DRX activation state; the receiving terminal is not limited to receive the retransmitted data packet in the activated state of the discontinuous reception configuration, that is, the receiving terminal can still start the second timer to listen to the retransmitted data packet in the inactivated state of the discontinuous reception configuration.
The fourth duration is assumed to be a time interval between the PSFCH resource for the transmitting terminal to receive the HARQ feedback and an active state of the discontinuous reception configuration after the resource.
At this time, the first timer configuration period is a maximum value between the first period and the fourth period, i.e., max (T1, T4). Further, if the retransmission data fed back by the NACK by the sending terminal has reserved retransmission resources, the first timing configuration duration is the second duration, or min (max (T1, T4), T2). Further alternatively, the first duration may be configured to be max (T1, T4), i.e. when the fourth duration is longer than the original first duration, the first duration may be adjusted to the fourth duration.
Example 4: when a sending terminal receives NACK feedback and needs to retransmit data, a sending terminal is configured to work in a DRX state, and the sending terminal needs to send the retransmitted data in a DRX activation state; and the receiving terminal is limited to receive the retransmission data packet in the activated state of the discontinuous reception configuration, namely the receiving terminal can start the second timer to listen to the retransmission data packet in the activated state of the discontinuous reception configuration.
At this time, the first timer configuration time period is the maximum value, i.e., max, among the first time period, the third time period, and the fourth time period (T1, T3, T4). Further, if the retransmission data fed back by the NACK by the sending terminal has reserved retransmission resources, the first timing configuration duration is the second duration, or min (max (T1, T3, T4), T2). Further alternatively, the first time period may be configured to be max (T1, T3, T4), that is, when the fourth time period or the third time period is longer than the original first time period, the first time period may be adjusted to be a maximum value between the third time period and the fourth time period, that is, max (T3, T4).
Further optionally, if the retransmission has reached the maximum retransmission number configured by the system, or the retransmission data exceeds the delay limit, the receiving terminal may choose not to start the first timer and the second timer, i.e. not to prepare to receive the retransmission data
Fig. 8 is a schematic diagram of an embodiment of a network device.
The embodiment of the present application further provides a network device, configured to implement the method in the embodiment of the present application, where the network device is configured to send indication information; the indication information is used for indicating at least one of a first duration, a second duration, a third duration and a fourth duration; preferably, the indication information includes a channel sensing duration-related configuration parameter, for example, a parameter indicating a channel sensing mode of the side link communication transmitting terminal.
In order to implement the foregoing technical solution, the network device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403.
The network sending module is used for sending a high-level signaling and/or a downlink control signaling, and the network sending module comprises configuration information.
The network determining module is configured to determine the first duration, the second duration, the third duration, and the fourth duration.
And the network receiving module is used for receiving the uplink control information.
The specific method for implementing the functions of the network sending module, the network determining module, and the network receiving module is described in the embodiments of the methods of the present application, and is not described herein again.
Fig. 9 is a schematic diagram of an embodiment of a terminal device.
The present application further provides a terminal device, configured to implement the method in the embodiment of the present application, where the terminal device is used as the receiving terminal and/or the sending terminal.
When the terminal equipment is a receiving terminal, the working process is as follows:
the method comprises the following steps that a receiving terminal obtains relevant configuration parameters of the channel interception duration of a sending terminal, wherein the relevant configuration parameters comprise the following parameters: sending a terminal channel interception mode and/or a first duration; the terminal equipment determines at least one of a first time length, a second time length, a third time length and a fourth time length according to the indication information, and the determined time length is used as the duration time length of the working of the first timer; preferably, when the indication information includes a channel sensing duration related configuration parameter (for example, a parameter indicating a channel sensing manner of the sidelink communication transmission terminal), at least one of the first duration, the second duration, the third duration, and the fourth duration may be determined according to the parameter.
And the receiving terminal starts a corresponding feedback timer according to a sending terminal channel interception mode under discontinuous reception, when the feedback timer is a first timer, the value of the first timer is related to the first time length, and the specific related method is as in the step 101-103. When the first timer is overtime and the second timer is started, the receiving terminal listens for the retransmission data packet during the period when the second timer is started.
When the terminal equipment is a sending terminal, the working process is as follows:
the sending terminal determines the relevant configuration parameters of the channel interception duration, and sends configuration information, wherein the configuration information at least comprises one of the following parameters: a channel monitoring mode and a first time length;
and when receiving the fed-back NACK information, the sending terminal works according to the configuration parameters, determines retransmission resources and sends retransmission data.
In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503.
The terminal receiving module is configured to receive a side link control Signaling (SCI), a downlink control signaling or a high-level signaling when the terminal device is a receiving terminal, and obtain indication information, where the indication information is used to determine a duration of a first timer; the acquisition mode of the indication information is at least one of the following modes: and sending a terminal notification, a base station notification and a system default configuration. Further preferably, the indication information is used to indicate at least one of a first duration, a second duration, a third duration, and a fourth duration; the terminal receiving module is further configured to receive side link data (PSSCH) and retransmitted side link data.
And when the terminal equipment is a sending terminal, the terminal receiving module is used for receiving side link feedback control information (SFCI) from a receiving terminal and obtaining HARQ-ACK.
And the terminal determining module is used for determining the duration of the first timer.
When the indication information comprises a first time length, the receiving terminal compares the first time length with at least one of a second time length, a third time length and a fourth time length respectively, and determines that the duration of the first timer is at least one of the following: min (T1, T2); max (T1, T3); max (T1, T4); max (T1, T3, T4); min (max (T1, T3), T2); min (max (T1, T4), T2); min (max (T1, T3, T4), T2)
According to embodiment 1, the first timer is configured to be a first time period T1, or a second time period T2, or min (T1, T2)
According to embodiment 2, the first timer is configured to max (T1, T3), or the second duration T2, or min (max (T1, T3), T2);
according to embodiment 3, the first timer is configured to max (T1, T4), or the second duration T2, or min (max (T1, T4), T2);
according to embodiment 4, the first timer is configured to be max (T1, T3, T4), or the second period of time T2, or min (max (T1, T3, T4), T2).
Further, in the sending terminal, the first duration is updated according to the value of the third duration and/or the fourth duration, and the value of the first duration is configured to be not less than at least one value of the third duration and the fourth duration.
The terminal sending module is used for sending SFCI (small form-factor compact) containing HARQ-ACK (hybrid automatic repeat request-acknowledgement) information when the terminal equipment is a receiving terminal; when the terminal device is a transmitting terminal, the terminal transmitting module is configured to transmit a side link control channel (PSCCH) including a side link control signaling, and is further configured to transmit side link data (PSCCH) for initial transmission and retransmission.
The specific method for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module is as described in the method embodiments of the present application, and is not described herein again.
The terminal equipment can be mobile terminal equipment.
Fig. 10 is a schematic structural diagram of a network device according to another embodiment of the present invention. As shown, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein the wireless interface may be a plurality of components, i.e. including a transmitter and a receiver, providing means for communicating with various other apparatus over a transmission medium. The wireless interface implements a communication function with the terminal device, and processes wireless signals through the receiving and transmitting devices, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program that executes any of the embodiments of the present application, running or changed on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described herein.
Fig. 11 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 700 comprises at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in the terminal device 700 are coupled together by a bus system. A bus system is used to enable connection communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 703 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen, among others.
The memory 702 stores executable modules or data structures. The memory may have stored therein an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, and the like for implementing various application services.
In the embodiment of the present invention, the memory 702 contains a computer program for executing any of the embodiments of the present application, and the computer program runs or changes on the processor 701.
The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and combines the hardware to complete the steps of the above-described method. In particular, the computer-readable storage medium has stored thereon a computer program which, when being executed by the processor 701, carries out the steps of the method embodiments as described above with reference to any of the embodiments.
The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of the present application may be implemented by hardware integrated logic circuits in the processor 701 or by instructions in the form of software. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding 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. In a typical configuration, the device of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and a memory.
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, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application therefore also proposes a computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application. For example, the memory 603, 702 of the present invention may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM).
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
Based on the embodiments of fig. 8 to 11, the present application further provides a mobile communication system including at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A discontinuous reception feedback timing method applied in side link communication is characterized in that,
when the receiving terminal receives discontinuously and the feedback information SFCI of the receiving terminal is NACK, starting a first timer, when the first timer is overtime, starting a second timer, and monitoring a retransmission data packet by the receiving terminal during the starting period of the second timer;
the duration of the first timer is one of the following duration values:
a first time duration T1, which is a time duration for the sending terminal to perform channel sensing when triggering resource selection;
a second duration T2, which is a time interval between the retransmission resource and the PSFCH resource of the previous feedback HARQ;
a third duration T3, which is a time interval between the PSFCH resource fed back by the HARQ of the receiving terminal and an active state configured for discontinuous reception after the resource;
a fourth time duration T4, which is the time interval between the PSFCH resource for the transmitting terminal to receive HARQ feedback and the active state configured for discontinuous reception after the resource.
2. The method of claim 1,
the duration of the timer is selected according to one of the following rules:
min(T1,T2)；max(T1,T3)；max(T1,T4)；max(T1,T3,T4)；min(max(T1,T3),T2)；min(max(T1,T4),T2)；min(max(T1,T3,T4),T2)。
3. the method of claim 1, wherein the receiving terminal obtains indication information for determining a duration of the first timer;
the acquisition mode of the indication information is at least one of the following modes:
and sending a terminal notification, a base station notification and a system default configuration.
4. The method of claim 3,
the indication information is used for indicating at least one of the first duration, the second duration, the third duration and the fourth duration.
5. The method of claim 3,
when the indication information comprises a first time length, comparing the first time length with at least one of a second time length, a third time length and a fourth time length respectively, and determining that the duration of the first timer is at least one of the following:
min(T1,T2)；max(T1,T3)；max(T1,T4)；max(T1,T3,T4)；min(max(T1,T3),T2)；min(max(T1,T4),T2)；min(max(T1,T3,T4),T2)。
6. a network device for implementing the method of any one of claims 1 to 5,
the network equipment is used for sending indication information;
the indication information is used for indicating at least one of the first duration, the second duration, the third duration and the fourth duration.
7. A terminal device implementing the method of any one of claims 1 to 5,
the terminal device is used as the receiving terminal and/or the sending terminal.
8. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 5.
9. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
10. A mobile communication system comprising at least one network device according to claim 6 and/or at least one terminal device according to claim 7.
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| CN110351898A (en) * | 2018-04-04 | 2019-10-18 | 华为技术有限公司 | Communication means, device, communication equipment and the communication system of discontinuous reception |
| CN111418223A (en) * | 2017-12-27 | 2020-07-14 | Oppo广东移动通信有限公司 | Method for managing timer and terminal equipment |
| CN112399644A (en) * | 2019-08-16 | 2021-02-23 | 华为技术有限公司 | Discontinuous receiving method, related device and system |
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| US20190052413A1 (en) * | 2017-08-10 | 2019-02-14 | Alireza Babaei | Harq retransmission and control channel monitoring |
| CN111418223A (en) * | 2017-12-27 | 2020-07-14 | Oppo广东移动通信有限公司 | Method for managing timer and terminal equipment |
| CN110351898A (en) * | 2018-04-04 | 2019-10-18 | 华为技术有限公司 | Communication means, device, communication equipment and the communication system of discontinuous reception |
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