CN116321533A - Communication method and terminal - Google Patents

Communication method and terminal Download PDF

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Publication number
CN116321533A
CN116321533A CN202111571507.9A CN202111571507A CN116321533A CN 116321533 A CN116321533 A CN 116321533A CN 202111571507 A CN202111571507 A CN 202111571507A CN 116321533 A CN116321533 A CN 116321533A
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CN
China
Prior art keywords
timer
drx
dtx
available resource
minimum
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CN202111571507.9A
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Chinese (zh)
Inventor
张惠英
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to CN202111571507.9A priority Critical patent/CN116321533A/en
Priority to PCT/CN2022/137433 priority patent/WO2023116445A1/en
Publication of CN116321533A publication Critical patent/CN116321533A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application provides a communication method and a terminal, and relates to the technical field of wireless communication. Determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication; if the SL available resource does not meet the minimum SL available resource requirement, prolonging the time length of the timer, so that the SL available resource in the time span from starting the timer to prolonging the time length meets the minimum SL available resource requirement; and starting a timer to enable the terminal to be in an activated state before the timer is overtime. By the communication method, when the terminal performs direct communication, the terminal can be ensured to perform data receiving and transmitting after entering the SLDRX and/or DTX active state each time.

Description

Communication method and terminal
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a communication method and a terminal.
Background
In a mobile communication system based on a shared channel, transmission of uplink and downlink data is controlled by a base station scheduler, and when the base station scheduler determines to schedule any user, a terminal can be notified to transmit or receive data through a control channel. And the terminal monitors the control channel, and when the scheduling information is monitored, the terminal completes the sending or receiving of the data according to the indication of the control channel.
In the active state, since the terminal does not determine when the base station schedules the base station, the terminal needs to monitor the control channel continuously, and analyze the subframe of each downlink scheduling control channel to determine whether to be scheduled. But power consumption increases when the terminal continuously listens to the control channel. To solve this problem, the cellular network communication system adopts a DRX (Discontinuous Reception ) operation mode, so that the terminal can periodically monitor the control channel.
However, in the direct communication, only the transmission and reception of the direct communication can be performed based on the logical slot resources in the resource pool, and when the terminal enters the active state based on the period of the SL (direct link) DRX, it may happen that during the whole operation period of the timer, no SL resources are available or there are not enough SL available resources, which may cause the terminal to fail to perform data transmission and reception even if entering the DRX active state.
Disclosure of Invention
The embodiment of the application provides a communication method and a terminal, which can ensure that the terminal can transmit and receive data after entering SL DRX and/or DTX active state each time during direct communication.
In a first aspect, an embodiment of the present application provides a communication method, including:
determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
if the SL available resource does not meet the minimum SL available resource requirement, prolonging the duration of the timer, so that the SL available resource in a time span from starting the timer to prolonging the duration meets the minimum SL available resource requirement;
and starting the timer to enable the terminal to be in an activated state before the timer is overtime.
In an alternative embodiment, the terminal being in an active state before the timer expires means: the terminal listens to the SL control channel on the SL available resource before the timer expires or the terminal transmits data on the SL available resource before the timer expires.
In an alternative embodiment, the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource.
In an alternative embodiment, the timer is used to identify that SL discontinuous reception DRX/discontinuous transmission DTX is active; the timer comprises at least one of the following:
SL DRX/DTX duration timer;
SL DRX/DTX inactivity timer;
SL DRX/DTX retransmission timer;
SL DRX/DTX minimum available resource timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with at least one of a SL DRX/DTX duration timer, a SL DRX/DTX inactivity timer, and a SL DRX/DTX retransmission timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with a SL DRX/DTX duration timer or a SL DRX/DTX inactivity timer or a SL DRX/DTX retransmission timer; the SL DRX/DTX minimum available resource timer duration may be based on the same or different minimum SL available resources.
In an alternative embodiment, the minimum SL available resource is configured by the base station for the terminal through dedicated signaling, broadcasting, or pre-configuration; alternatively, the minimum SL available resource is configured by a transmitting terminal, and the transmitting terminal transmits the configured minimum SL available resource to a receiving terminal through SL control plane signaling, SL medium access control unit MAC CE, or through link control information SCI.
In an alternative embodiment, the SL available resources include at least one of:
SL logical slot number;
SL subchannel number;
SL physical resource block number.
In a second aspect, an embodiment of the present application provides a terminal, including:
the determining unit is used for determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
an extension unit that extends the duration of the timer if the SL available resource does not meet the minimum SL available resource requirement, such that the SL available resource within a time span from starting the timer to extending the duration meets the minimum SL available resource requirement;
and the starting unit starts the timer to enable the terminal to be in an activated state before the timer is overtime.
In a third aspect, an embodiment of the present application provides a terminal, including: a memory, a transceiver, and a processor;
the memory is used for storing computer instructions;
the transceiver is used for receiving and transmitting data under the control of the processor;
the processor is configured to read the computer program in the memory and execute the following steps:
determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
If the SL available resource does not meet the minimum SL available resource requirement, prolonging the duration of the timer, so that the SL available resource in a time span from starting the timer to prolonging the duration meets the minimum SL available resource requirement;
and starting the timer to enable the terminal to be in an activated state before the timer is overtime.
In an alternative embodiment, the terminal being in an active state before the timer expires means: the terminal listens to the SL control channel on the SL available resource before the timer expires or the terminal transmits data on the SL available resource before the timer expires.
In an alternative embodiment, the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource.
In an alternative embodiment, the timer is used to identify that SL discontinuous reception DRX/discontinuous transmission DTX is active; the timer comprises at least one of the following:
SL DRX/DTX duration timer;
SL DRX/DTX inactivity timer;
SL DRX/DTX retransmission timer;
SL DRX/DTX minimum available resource timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with at least one of a SL DRX/DTX duration timer, a SL DRX/DTX inactivity timer, and a SL DRX/DTX retransmission timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with a SL DRX/DTX duration timer or a SL DRX/DTX inactivity timer or a SL DRX/DTX retransmission timer; the SL DRX/DTX minimum available resource timer duration may be based on the same or different minimum SL available resources.
In an alternative embodiment, the minimum SL available resource is configured by the base station for the terminal through dedicated signaling, broadcasting, or pre-configuration; alternatively, the minimum SL available resource is configured by a transmitting terminal, and the transmitting terminal transmits the configured minimum SL available resource to a receiving terminal through SL control plane signaling, SL medium access control unit MAC CE, or through link control information SCI.
In an alternative embodiment, the SL available resources include at least one of:
SL logical slot number;
SL subchannel number;
SL physical resource block number.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the method of any one of the first aspects.
According to the communication method and the terminal provided by the embodiment of the application, whether the available resources of the direct link SL in the resource pool meet the minimum SL available resource requirement can be determined according to the initial time length of the timer related to direct communication; if the SL available resource does not meet the minimum SL available resource requirement, prolonging the time length of the timer, so that the SL available resource in the time span from starting the timer to prolonging the time length meets the minimum SL available resource requirement; and starting a timer after the prolonged time period to enable the terminal to be in an activated state before the timer is overtime. By the communication method, when the terminal performs direct communication, the terminal can be ensured to perform data transmission and reception after entering the SL DRX and/or DTX (Discontinuous Transmission ) active state each time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a communication network applicable to an embodiment of the present application;
fig. 2 is a schematic flow chart of a communication method according to an embodiment of the present application;
fig. 3 is a schematic diagram of extending a timer duration according to an embodiment of the present application;
FIG. 4 is a schematic diagram of another embodiment of a timer duration extension method;
FIG. 5 is a schematic diagram of another embodiment of a timer duration extension method;
FIG. 6 is a schematic diagram of another embodiment of a timer duration extension method;
fig. 7 is a block diagram of a structure of a terminal according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.
It should be noted that, in the embodiments of the present application, "first" and "second" are used to distinguish similar objects, and are not used to describe a specific order or precedence. In the embodiment of the application, "and/or" describing the association relationship of the association object, three relationships may exist, for example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.
Fig. 1 is a schematic structural diagram of a communication network applicable to the embodiment of the present application. The communication system includes a terminal 101, a terminal 102, and a network-side device 103. The terminals 101 and 102 may also be referred to as terminal devices or User Equipment (UE), and the terminals 101 and 102 may be terminal-side devices such as mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop computers), personal digital assistants (Personal Digital Assistant, PDA), mobile internet devices (Mobile Internet Device, MID), wearable devices (wireless devices), or in-vehicle devices.
The network side device 103 may be a base station or a core network, where the base station may be a 5G or later version base station (e.g., a gNB, a 5G NR NB, etc.), or a base station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), and the base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, a BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, where the base station is not limited to a specific technical vocabulary, but only takes a base station in the NR system as an example in the embodiment of the present invention, and does not limit the specific type of the base station. The base stations may communicate with the terminal 101 and the terminal 102 under the control of a base station controller, which may be part of the core network or some base stations.
The terminal 101 and the terminal 102 may perform data transmission with the network side device 103 through Uu interface.
Terminal 101 and terminal 102 may also communicate directly over a pass-through link. In the direct communication, the transmission and the reception of the direct communication can only be performed based on the logic time slot resources in the resource pool, and when the terminal starts the timer to enter the active state based on the period of the SL DRX, it may happen that during the running period of the whole timer, no available SL resources or insufficient SL available resources exist, which may cause the terminal to fail to perform data transmission and reception even if entering the DRX active state.
Based on this, the embodiment of the application provides a communication method and a terminal, which can determine whether the available resources of a direct link SL in a resource pool meet the minimum SL available resource requirement according to the initial duration of a timer related to direct communication; if the SL available resource does not meet the minimum SL available resource requirement, prolonging the time length of the timer, so that the SL available resource in the time span from starting the timer to prolonging the time length meets the minimum SL available resource requirement; and starting a timer after the prolonged time period to enable the terminal to be in an activated state before the timer is overtime. By the communication method, when the terminal performs direct communication, the terminal can be ensured to transmit and receive data after entering the SL DRX and/or DTX active state each time.
Fig. 2 shows a flow chart of a communication method provided in an embodiment of the present application, where the communication method may be performed by a transmitting terminal or a receiving terminal performing direct communication, for example, may be performed by the terminal 101 or the terminal 102 in fig. 1. As shown in fig. 2, the method comprises the steps of:
step S201, according to the initial time length of the timer related to the direct communication, determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement.
The initial duration is configured or preconfigured; the SL available resources may be at least one of a SL logical slot number, a SL subchannel number, and a SL physical resource block number (physical resource block, PRB); the minimum SL available resources may be configured by the base station to the terminal through dedicated signaling, broadcasting, or pre-configuration, or may be configured by the transmitting terminal. After configuring the minimum SL available resource, the transmitting terminal may transmit the configured minimum SL available resource to the receiving terminal through SL control plane signaling, SL MAC CE (Medium Access Control Control Element medium access control element) or SCI (Sidelink Control Information, through link control information).
The Timer may be used to control a state of the SL DRX/DTX, such as the Timer being in an active state during an instant, being in an inactive state after a timeout, and the Timer may be at least one of a SL DRX/DTX duration Timer (on Duration Timer), a SL DRX/DTX Inactivity Timer (Inactivity Timer), a SL DRX/DTX retransmission Timer (Retransmission Timer), and a SL DRX/DTX minimum available resource Timer; the SL DRX/DTX retransmission timer may also be referred to as an SL DRX/DTX HARQ (Hybrid Automatic Repeat reQuest ) retransmission timer.
Step S202, if the SL available resource does not meet the minimum SL available resource requirement, the duration of the timer is prolonged, so that the SL available resource in the time span from starting the timer to the prolonged duration meets the minimum SL available resource requirement.
Step S203, a timer is started, so that the terminal is in an activated state before the timer is overtime.
In an alternative embodiment, the terminal being in an active state before the timer expires means that: the terminal listens to the SL control channel on the SL available resources before the timer expires or the terminal transmits data on the SL available resources before the timer expires. For example, the DSL control channel may be continuously monitored on each SL available resource, or when there is data to be transmitted, one of the available resources may be selected on the SL available resource to transmit the data.
In an alternative embodiment, if the SL available resource meets the minimum SL available resource requirement, starting a timer according to an initial duration of the timer; if the SL available resource does not meet the minimum SL available resource requirement, the duration of the timer is prolonged, so that the SL available resource within the time span from starting the timer to the time after the prolonged duration meets the minimum SL available resource requirement. Wherein the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource; failure of the SL available resource to meet the minimum SL available resource requirement means that the SL available resource is less than the minimum SL available resource.
In an alternative embodiment, if the SL available resource in the resource pool is smaller than the configured minimum SL available resource within the initial duration of the timer, determining that the SL available resource in the resource pool is greater than or equal to the target duration required when the minimum SL available resource; and sets the target time length as the time length of the timer.
Specifically, the timer is SL DRX/DTX on Duration Timer, and the SL available resource is the number of SL logical slots.
Assume that UE1 and UE2 perform SL unicast communication, where UE1 is a transmitting terminal and UE2 is a receiving terminal; the base station can send configuration information to the UE1 through a special signaling, broadcasting or pre-configuration mode, wherein the configuration information comprises a DRX/DTX period of 200ms, SL DRX/DTX on Duration Timer of 4ms and SL minimum available resources of 4 logic time slots; wherein one logical slot takes 1ms.
Illustratively, in one embodiment, as shown in fig. 3, the time slot marked with X in fig. 3 indicates that the time slot is not available for SL communication, i.e., the fifth logical time slot and the seventh logical time slot are logical time slots that are not available for SL communication in the first SL DRX/DTX cycle, and the second logical time slot, the fourth logical time slot, and the sixth logical time slot are logical time slots that are not available for SL communication in the second SL DRX/DTX cycle.
In the first SL DRX/DTX cycle, there are 2 logical slots that cannot be used for SL communication in the initial duration of the SL DRX/DTX on Duration Timer, i.e. from the fifth logical slot to the eighth logical slot, and thus the requirement of the minimum available SL resources cannot be met, and thus it is necessary to redetermine, when the available SL resources are equal to the minimum available SL resources, the required target duration, as can be seen from fig. 3, when the target duration is 6ms and the available SL resources are equal to the minimum available SL resources, and thus the actual duration of the SL DRX/DTX on Duration Timer can be set to 6ms.
By the method, after the length of SL DRX/DTX on Duration Timer is prolonged, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the fifth logic time slot, namely UE1 and UE2 enter an active state, and the activation time of UE1 and UE2 is 6ms.
In the second SL DRX/DTX cycle, there are 2 logical slots that cannot be used for SL communication in the initial duration of the SL DRX/DTX on Duration Timer, i.e. from the first logical slot to the fourth logical slot, which cannot meet the requirement of the minimum SL available resource, and thus a re-determination is required, and when the SL available resource is equal to the minimum SL available resource, the required target duration, as can be seen from fig. 3, when the target duration is 7ms and the SL available resource is equal to the minimum SL available resource, the actual duration of the SL DRX/DTX on Duration Timer can be set to 7ms.
By the method, after the length of SL DRX/DTX on Duration Timer is prolonged, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logic time slot, namely UE1 and UE2 enter an active state, and the activation time of UE1 and UE2 is 7ms.
In another optional implementation manner, if the SL available resource in the resource pool is smaller than the minimum SL available resource in the initial period, the period of the timer is gradually prolonged according to a set step length until the SL available resource in the resource pool is greater than or equal to the minimum SL available resource, where the set step length may be 1ms or 2ms, which is not limited in this application.
Specifically, in one embodiment, as shown in fig. 3, in the first SL DRX/DTX cycle, in the initial duration of SL DRX/DTX on Duration Timer, that is, from the fifth logical time slot to the eighth logical time slot, there are 2 logical time slots that cannot be used for SL communication, and the requirement of the minimum available SL resources cannot be met, the duration of SL DRX/DTX on Duration Timer is gradually prolonged according to a step size of 1ms, and after the period is prolonged 2 times, the available SL resources can be made to be equal to the minimum available SL resources, so that the duration of SL DRX/DTX on Duration Timer can be prolonged by 2ms based on the initial duration of SL DRX/DTX on Duration Timer, that is, the actual duration of SL DRX/DTX on Duration Timer is 6ms in the first SL DRX/DTX cycle.
By the method, after the length of SL DRX/DTX on Duration Timer is prolonged, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the fifth logic time slot, namely UE1 and UE2 enter an active state, and the activation time of UE1 and UE2 is 6ms.
In the second SL DRX/DTX cycle, as shown in fig. 3, in the initial duration of SL DRX/DTX on Duration Timer, that is, from the first logical time slot to the fourth logical time slot, there are 2 logical time slots that cannot be used for SL communication, and the requirement of the minimum available SL resource cannot be met, the duration of SL DRX/DTX on Duration Timer is gradually prolonged by 1ms step, and after the extension is 3 times, the available SL resource can be made equal to the minimum available SL resource. Thus, the length of SL DRX/DTX on Duration Timer may be extended by 3ms based on the initial length of SL DRX/DTX on Duration Timer, i.e., the actual length of SL DRX/DTX on Duration Timer is 7ms in the second SL DRX/DTX period.
By the method, after the length of SL DRX/DTX on Duration Timer is prolonged, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logic time slot, namely UE1 and UE2 enter an active state, and the activation time of UE1 and UE2 is 7ms.
In another alternative embodiment, the activation time of UE1 and UE2 may be extended by a SL DRX/DTX minimum available resource timer. Specifically, when either of the timers UE1 and UE2 is started, the SL DRX/DTX minimum available resource timer may be started simultaneously, and when either of the timers is in the started state, both UE1 and UE2 are in the activated state.
Taking the timers as SL DRX/DTX on Duration Timer and SL DRX/DTX minimum available resource timers as examples, the SL available resource is the number of SL logic time slots, wherein the initial duration of the SL DRX/DTX minimum available resource timers is 0ms.
Assume that UE1 and UE2 perform SL unicast communication, where UE1 is a transmitting terminal and UE2 is a receiving terminal; the base station can send configuration information to the UE1 through a special signaling, broadcasting or pre-configuration mode, wherein the configuration information comprises a DRX/DTX period of 200ms, SL DRX/DTX on Duration Timer of 4ms, a minimum available resource timer of 0ms and 4 logic time slots of SL DRX/DTX; wherein one logical slot takes 1ms.
Illustratively, in one embodiment, as shown in fig. 4, the time slot marked with X in fig. 4 indicates that the time slot is not available for SL communication, i.e., the fifth logical time slot and the seventh logical time slot are logical time slots that are not available for SL communication in the first SL DRX/DTX cycle, and the second logical time slot, the fourth logical time slot, and the sixth logical time slot are logical time slots that are not available for SL communication in the second SL DRX/DTX cycle.
In the first SL DRX/DTX cycle, the duration of the SL DRX/DTX minimum available resource timer may be determined based on the SL minimum available resource, i.e. starting from the moment of the first logical slot, and determining the required duration when the SL available resource equals the minimum SL available resource, i.e. the duration of the SL DRX/DTX minimum available resource timer. As can be seen from fig. 4, the determined SL DRX/DTX minimum available resource timer has a duration of 6ms.
After determining the duration of the minimum available resource timer of the SL DRX/DTX by the method, the UE1 and the UE2 start SL DRX/DTX on Duration Timer at the beginning of the fifth logic time slot, and start the minimum available resource timer of the SL DRX/DTX, namely the UE1 and the UE2 enter an activated state, and the activation time of the UE1 and the UE2 is 6ms.
In the second SL DRX/DTX cycle, the duration of the SL DRX/DTX minimum available resource timer may be determined based on the SL minimum available resource, i.e. starting from the moment of the first logical slot, and determining the required duration when the SL available resource equals the minimum SL available resource, i.e. the duration of the SL DRX/DTX minimum available resource timer. As can be seen from fig. 4, the determined SL DRX/DTX minimum available resource timer has a duration of 7ms.
By the method, after the duration of the minimum available resource timer of SL DRX/DTX is determined, the UE1 and the UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logic time slot, and simultaneously start the minimum available resource timer of SL DRX/DTX, namely the UE1 and the UE2 enter an activated state, and the activation time of the UE1 and the UE2 is 7ms.
In another alternative embodiment, the timer may be two of SL DRX/DTX on Duration Timer, SL DRX/DTX Inactivity Timer and SL DRX/DTX Retransmission Timer.
Specifically, the examples of the timers SL DRX/DTX on Duration Timer and SL DRX/DTX Inactivity Timer are given by way of example, and the SL available resource is the number of SL logical slots.
Assume that UE1 and UE2 perform SL unicast communication, where UE1 is a transmitting terminal and UE2 is a receiving terminal; the base station can send configuration information to the UE1 through a special signaling, broadcasting or pre-configuration mode, wherein the configuration information comprises a DRX/DTX period of 200ms, a SL DRX/DTX on Duration Timer of 4ms, a SL DRX/DTX Inactivity Timer of 6ms and 4 logic time slots of the minimum available SL resources; wherein one logical slot takes 1ms.
Illustratively, in one embodiment, as shown in fig. 5, the time slot marked with X in fig. 5 indicates that the time slot is not available for SL communication, i.e., the fifth logical time slot and the seventh logical time slot are logical time slots that are not available for SL communication in the first SL DRX/DTX cycle, and the sixth logical time slot, the eighth logical time slot, and the ninth logical time slot are logical time slots that are not available for SL communication in the second SL DRX/DTX cycle.
In the first SL DRX/DTX period, in the initial duration of SL DRX/DTX on Duration Timer, namely from the fifth logic time slot to the eighth logic time slot, no logic time slot which cannot be used for SL communication exists, so that the requirement of minimum available resources of SL can be met; in the initial duration of SL DRX/DTX Inactivity Timer, namely from the third logic time slot to the eighth logic time slot, 2 logic time slots which cannot be used for SL communication exist, namely the SL available resource is 4 logic time slots, so as to meet the requirement of the minimum available resource of SL; thus, there is no need to extend the duration of SL DRX/DTX on Duration Timer and SL DRX/DTX Inactivity Timer during the first SL DRX/DTX period.
UE1 and UE2 start SL DRX/DTX on Duration Timer at the first logical slot start, i.e. UE1 and UE2 enter active state, and at time T1, i.e. at the third logical slot start, UE1 sends a data packet to UE2, UE1 and UE2 start SL DRX/DTX Inactivity Timer, and the activation time of UE1 and UE2 is 8ms.
In the second SL DRX/DTX period, in the initial duration of SL DRX/DTX on Duration Timer, namely from the first logic time slot to the fourth logic time slot, no logic time slot which cannot be used for SL communication exists, so that the requirement of minimum available resources of SL can be met; in the initial duration of SL DRX/DTX Inactivity Timer, namely from the fourth logic time slot to the ninth logic time slot, 3 logic time slots which cannot be used for SL communication exist, namely the SL available resource is 3 logic time slots, and the requirement of the minimum available resource of SL is not met; therefore, the length of the SL DRX/DTX Inactivity Timer needs to be gradually prolonged by 1ms step length, and after the length is prolonged by 1 time, the SL available resource can be equal to the minimum SL available resource, so that the length of the SL DRX/DTX Inactivity Timer can be prolonged by 1ms on the basis of the initial length of the SL DRX/DTX Inactivity Timer, that is, the actual length of the SL DRX/DTX Inactivity Timer is 7ms in the second SL DRX/DTX cycle.
UE1 and UE2 start SL DRX/DTX on Duration Timer at the first logical slot start, i.e. UE1 and UE2 enter active state, and at time T2, i.e. at the fourth logical slot start, UE1 sends a data packet to UE2, UE1 and UE2 start SL DRX/DTX Inactivity Timer, and the activation time of UE1 and UE2 is 10ms.
In another alternative embodiment, different minimum SL available resources may be configured for different timers in addition to the same minimum SL available resources configured for different timers described above.
Specifically, the examples of the timers are SL DRX/DTX on Duration Timer, SL DRX/DTX Inactivity Timer and SL DRX/DTX Retransmission Timer, and the SL available resource is the SL logical time slot number.
Assume that UE1 and UE2 perform SL unicast communication, where UE1 is a transmitting terminal and UE2 is a receiving terminal; the base station can send configuration information to the UE1 through a special signaling, broadcasting or pre-configuration mode, wherein the configuration information comprises a DRX/DTX period of 200ms, SL DRX/DTX on Duration Timer of 4ms and 4 logic time slots of the minimum available resource of SL DRX/DTX on Duration; SL DRX/DTX Inactivity Timer is 4ms, SL DRX/DTX Inactivity minimum available resource is 3 logical Time slots, SL DRX/DTX HARQ RTT (Round Trip Time) Timer is 0ms, SL DRX/DTX Retransmission Timer is 4ms, SL DRX/DTX Retransmission minimum available resource is 4 logical Time slots; wherein one logical slot takes 1ms.
Illustratively, in one embodiment, as shown in fig. 6, the time slot marked with X in fig. 6 indicates that the time slot is not available for SL communication, i.e., the fifth logical time slot and the seventh logical time slot are logical time slots that are not available for SL communication in the first SL DRX/DTX cycle, and the sixth logical time slot, the eighth logical time slot, and the ninth logical time slot are logical time slots that are not available for SL communication in the second SL DRX/DTX cycle.
In the first SL DRX/DTX period, in the initial Duration of SL DRX/DTX on Duration Timer, namely from the first logic time slot to the fourth logic time slot, no logic time slot which cannot be used for SL communication exists, so that the requirement of the minimum available resource of SL DRX/DTX on Duration can be met; in the initial duration of SL DRX/DTX Inactivity Timer, namely from the third logical time slot to the sixth logical time slot, 1 logical time slot which cannot be used for SL communication exists, namely the SL available resource is 3 logical time slots, so that the requirement of minimum available resource of SL DRX/DTX activity can be met; in the initial duration of SL DRX/DTX Retransmission Timer, namely from the third logic time slot to the sixth logic time slot, 1 logic time slot which cannot be used for SL communication exists, namely the SL available resource is 3 logic time slots, the requirement of the minimum available resource of SL DRX/DTX Retransmission is not met, so that the duration of SL DRX/DTX Retransmission Timer needs to be gradually prolonged by 1ms step length, after the extension is carried out 2 times, the SL available resource can be equal to the minimum SL available resource, and therefore, the duration of SL DRX/DTX Retransmission Timer can be prolonged by 2ms on the basis of the initial duration of SL DRX/DTX Retransmission Timer, namely the actual duration of SL DRX/DTX Retransmission Timer is 6ms in the first SL DRX/DTX period.
By the method, after the duration of SL DRX/DTX Retransmission Timer is prolonged, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logic time slot, namely UE1 and UE2 enter an active state, at the moment T1, namely at the beginning of the third logic time slot, UE1 sends a data packet to UE2, and UE1 and UE2 start SL DRX/DTX Inactivity Timer and start SL DRX/DTX Retransmission Timer at the same time. The activation time of UE1 and UE2 is 8ms.
In the second SL DRX/DTX period, in the initial Duration of SL DRX/DTX on Duration Timer, namely from the first logic time slot to the fourth logic time slot, no logic time slot which cannot be used for SL communication exists, so that the requirement of minimum available resources of SL DRX/DTX on Duration can be met; in the initial duration of SL DRX/DTX Inactivity Timer, namely from the fourth logic time slot to the seventh logic time slot, 1 logic time slot which cannot be used for SL communication exists, namely the SL available resource is 3 logic time slots, so that the requirement of minimum available resource of SL DRX/DTX activity can be met; in the initial duration of SL DRX/DTX Retransmission Timer, namely from the fourth logic time slot to the seventh logic time slot, 1 logic time slot which cannot be used for SL communication exists, namely the SL available resource is 3 logic time slots, the requirement of the minimum available resource of SL DRX/DTX Retransmission is not met, so that the duration of SL DRX/DTX Retransmission Timer needs to be gradually prolonged by 1ms step length, after the extension is carried out 3 times, the SL available resource can be equal to the minimum SL available resource, and therefore, the duration of SL DRX/DTX Retransmission Timer can be prolonged by 3ms on the basis of the initial duration of SL DRX/DTX Retransmission Timer, namely the actual duration of SL DRX/DTX Retransmission Timer is 7ms in the second SL DRX/DTX period.
By the method, after the duration of SL DRX/DTX Retransmission Timer is prolonged, UE1 and UE2 start SL DRX/DTX on Duration Timer at the beginning of the first logic time slot, namely UE1 and UE2 enter an active state, at the moment T2, namely at the beginning of the fourth logic time slot, UE1 sends a data packet to UE2, and UE1 and UE2 start SL DRX/DTX Inactivity Timer and start SL DRX/DTX Retransmission Timer at the same time. The activation time of UE1 and UE2 is 10ms.
In an alternative embodiment, when a timer corresponding to direct communication is started, UE1 and UE2 enter an active state of monitoring a through link SL control channel, if SL available resources in a resource pool are smaller than configured minimum SL available resources in an initial duration of the timer, after the timer times out, UE1 and UE2 do not enter an inactive state until SL available resources in the resource pool are equal to configured minimum SL available resources, and then UE1 and UE2 enter an inactive state.
In the embodiment of the present application, the method and the device are applicable not only to the case of performing SL unicast communication by the UE1 and the UE2, but also to the case of performing SL multicast and SL broadcast by the UE1 and the UE 2.
Based on the same inventive concept, the embodiment of the present application provides a terminal, as shown in fig. 7, including a determining unit 701, an extending unit 702, and an opening unit 703; wherein:
A determining unit 701, configured to determine, according to an initial duration of a timer associated with direct communication, whether an available resource of a direct link SL in a resource pool meets a minimum SL available resource requirement;
an extension unit 702, configured to extend the duration of the timer if the SL available resource does not meet the minimum SL available resource requirement, so that the SL available resource within a time span from starting the timer to extending the duration meets the minimum SL available resource requirement;
and a starting unit 703 for starting the timer to enable the terminal to be in an activated state before the timer is overtime.
In an alternative embodiment, the terminal being in an active state before the timer expires means: the terminal listens to the SL control channel on the SL available resource before the timer expires or the terminal transmits data on the SL available resource before the timer expires.
In an alternative embodiment, the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource.
In an alternative embodiment, the timer is used to identify that SL discontinuous reception DRX/discontinuous transmission DTX is active; the timer comprises at least one of the following:
SL DRX/DTX duration timer;
SL DRX/DTX inactivity timer;
SL DRX/DTX retransmission timer;
SL DRX/DTX minimum available resource timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with at least one of a SL DRX/DTX duration timer, a SL DRX/DTX inactivity timer, and a SL DRX/DTX retransmission timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with a SL DRX/DTX duration timer or a SL DRX/DTX inactivity timer or a SL DRX/DTX retransmission timer; the SL DRX/DTX minimum available resource timer duration may be based on the same or different minimum SL available resources.
In an alternative embodiment, the minimum SL available resource is configured by the base station for the terminal through dedicated signaling, broadcasting, or pre-configuration; alternatively, the minimum SL available resource is configured by a transmitting terminal, and the transmitting terminal transmits the configured minimum SL available resource to a receiving terminal through SL control plane signaling, SL medium access control unit MAC CE, or through link control information SCI.
In an alternative embodiment, the SL available resources include at least one of:
SL logical slot number;
SL subchannel number;
SL physical resource block number.
Based on the same technical conception, the embodiment of the application also provides a terminal. The terminal is capable of performing any one of the communication methods implemented in the above embodiments.
Fig. 8 shows a schematic structural diagram of the terminal provided in the embodiment of the present application, that is, another schematic structural diagram of the terminal is shown. As shown in fig. 8, the terminal includes a processor 801, a memory 802, and a transceiver 803.
The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations. The transceiver 803 is configured to receive and transmit data under the control of the processor 801.
A bus architecture may be comprised of any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 801 and various circuits of memory, represented by the memory 802. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations.
The flow disclosed in the embodiments of the present application may be applied to the processor 801 or implemented by the processor 801. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware in the processor 801 or instructions in software. The processor 801 may be a general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 802, and the processor 801 reads information in the memory 802 and completes steps of the signal processing flow in combination with its hardware.
Specifically, the processor 801 is configured to read a computer program in the memory 802, and when the processor 801 executes the computer program, the processor 801 realizes:
determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
if the SL available resource does not meet the minimum SL available resource requirement, prolonging the duration of the timer, so that the SL available resource in a time span from starting the timer to prolonging the duration meets the minimum SL available resource requirement;
and starting the timer to enable the terminal to be in an activated state before the timer is overtime.
In an alternative embodiment, the terminal being in an active state before the timer expires means: the terminal listens to the SL control channel on the SL available resource before the timer expires or the terminal transmits data on the SL available resource before the timer expires.
In an alternative embodiment, the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource.
In an alternative embodiment, the timer is used to identify that SL discontinuous reception DRX/discontinuous transmission DTX is active; the timer comprises at least one of the following:
SL DRX/DTX duration timer;
SL DRX/DTX inactivity timer;
SL DRX/DTX retransmission timer;
SL DRX/DTX minimum available resource timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with at least one of a SL DRX/DTX duration timer, a SL DRX/DTX inactivity timer, and a SL DRX/DTX retransmission timer.
In an alternative embodiment, the SL DRX/DTX minimum available resource timer is started simultaneously with a SL DRX/DTX duration timer or a SL DRX/DTX inactivity timer or a SL DRX/DTX retransmission timer; the SL DRX/DTX minimum available resource timer duration may be based on the same or different minimum SL available resources.
In an alternative embodiment, the minimum SL available resource is configured by the base station for the terminal through dedicated signaling, broadcasting, or pre-configuration; alternatively, the minimum SL available resource is configured by a transmitting terminal, and the transmitting terminal transmits the configured minimum SL available resource to a receiving terminal through SL control plane signaling, SL medium access control unit MAC CE, or through link control information SCI.
In an alternative embodiment, the SL available resources include at least one of:
SL logical slot number;
SL subchannel number;
SL physical resource block number.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application 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 is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor 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 processor 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 modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (18)

1. A method of communication, the method comprising:
determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
if the SL available resource does not meet the minimum SL available resource requirement, prolonging the duration of the timer, so that the SL available resource in a time span from starting the timer to prolonging the duration meets the minimum SL available resource requirement;
and starting the timer to enable the terminal to be in an activated state before the timer is overtime.
2. The method of claim 1, wherein the terminal being in an active state before a timer expires means: the terminal listens to the SL control channel on the SL available resource before the timer expires or the terminal transmits data on the SL available resource before the timer expires.
3. The method of claim 1, wherein the SL available resources meeting the minimum SL available resource requirement means that the SL available resources are greater than or equal to the minimum SL available resources.
4. The method of claim 1, wherein the timer is used to identify that SL discontinuous reception, DRX, discontinuous transmission, DTX, is active; the timer comprises at least one of the following:
SL DRX/DTX duration timer;
SL DRX/DTX inactivity timer;
SL DRX/DTX retransmission timer;
SL DRX/DTX minimum available resource timer.
5. The method of claim 4, wherein the SL DRX/DTX minimum available resource timer is started simultaneously with at least one of a SL DRX/DTX duration timer, a SL DRX/DTX inactivity timer, and a SL DRX/DTX retransmission timer.
6. The method of claim 5, wherein the SL DRX/DTX minimum available resource timer is started simultaneously with a SL DRX/DTX duration timer or a SL DRX/DTX inactivity timer or a SL DRX/DTX retransmission timer; the SL DRX/DTX minimum available resource timer duration may be based on the same or different minimum SL available resources.
7. The method according to any of claims 1-6, characterized in that the minimum SL available resource is configured for the terminal by the base station through dedicated signaling, broadcasting or pre-configuration; alternatively, the minimum SL available resource is configured by a transmitting terminal, and the transmitting terminal transmits the configured minimum SL available resource to a receiving terminal through SL control plane signaling, SL medium access control unit MAC CE, or through link control information SCI.
8. The method according to any of claims 1-6, wherein the SL available resources comprise at least one of:
SL logical slot number;
SL subchannel number;
SL physical resource block number.
9. A terminal, the terminal comprising:
the determining unit is used for determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
an extension unit that extends the duration of the timer if the SL available resource does not meet the minimum SL available resource requirement, such that the SL available resource within a time span from starting the timer to extending the duration meets the minimum SL available resource requirement;
and the starting unit starts the timer to enable the terminal to be in an activated state before the timer is overtime.
10. A terminal, the terminal comprising: a memory, a transceiver, and a processor;
the memory is used for storing computer instructions;
the transceiver is used for receiving and transmitting data under the control of the processor;
the processor is configured to read the computer program in the memory and execute the following steps:
Determining whether the available resources of the through link SL in the resource pool meet the minimum SL available resource requirement according to the initial time length of the timer related to the direct communication;
if the SL available resource does not meet the minimum SL available resource requirement, prolonging the duration of the timer, so that the SL available resource in a time span from starting the timer to prolonging the duration meets the minimum SL available resource requirement;
and starting the timer to enable the terminal to be in an activated state before the timer is overtime.
11. The terminal according to claim 10, wherein the terminal being in an active state before a timer expires means: the terminal listens to the SL control channel on the SL available resource before the timer expires or the terminal transmits data on the SL available resource before the timer expires.
12. The terminal of claim 10, wherein the SL available resource meeting the minimum SL available resource requirement means that the SL available resource is greater than or equal to the minimum SL available resource.
13. The terminal according to claim 10, wherein the timer is configured to identify that SL discontinuous reception, DRX, DTX, is active; the timer comprises at least one of the following:
SL DRX/DTX duration timer;
SL DRX/DTX inactivity timer;
SL DRX/DTX retransmission timer;
SL DRX/DTX minimum available resource timer.
14. The terminal of claim 13, wherein the SL DRX/DTX minimum available resource timer is started simultaneously with at least one of a SL DRX/DTX duration timer, a SL DRX/DTX inactivity timer, and a SL DRX/DTX retransmission timer.
15. The terminal of claim 14, wherein the SL DRX/DTX minimum available resource timer is started simultaneously with a SL DRX/DTX duration timer or a SL DRX/DTX inactivity timer or a SL DRX/DTX retransmission timer; the SL DRX/DTX minimum available resource timer duration may be based on the same or different minimum SL available resources.
16. A terminal according to any of claims 10-15, characterized in that the minimum SL available resource is configured for the terminal by a base station through dedicated signaling, broadcasting or pre-configuration; alternatively, the minimum SL available resource is configured by a transmitting terminal, and the transmitting terminal transmits the configured minimum SL available resource to a receiving terminal through SL control plane signaling, SL medium access control unit MAC CE, or through link control information SCI.
17. A terminal according to any of claims 10-15, characterized in that the SL-available resources comprise at least one of:
SL logical slot number;
SL subchannel number;
SL physical resource block number.
18. A computer readable storage medium, characterized in that the storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1 to 8.
CN202111571507.9A 2021-12-21 2021-12-21 Communication method and terminal Pending CN116321533A (en)

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US11252669B2 (en) * 2018-07-25 2022-02-15 Qualcomm Incorporated Selective extension of an active period of a DRX cycle for reselection
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US11750330B2 (en) * 2019-08-29 2023-09-05 Qualcomm Incorporated Radio link monitoring for sidelink communications
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