CN113170292B - Method and device for configuring sidelink, communication equipment and storage medium - Google Patents

Method and device for configuring sidelink, communication equipment and storage medium Download PDF

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Publication number
CN113170292B
CN113170292B CN202180000839.3A CN202180000839A CN113170292B CN 113170292 B CN113170292 B CN 113170292B CN 202180000839 A CN202180000839 A CN 202180000839A CN 113170292 B CN113170292 B CN 113170292B
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terminal
duration
guard interval
network
switching time
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CN113170292A (en
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郭胜祥
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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 embodiment of the disclosure provides a configuration method and device of a sidelink, a communication device and a storage medium. The method is executed by a terminal and comprises the following steps: reporting network switching time supported by the terminal, wherein the network switching time is the time for the terminal to switch the network between the SL and the new air interface NR; receiving a guard interval of the SL configured based on the network switching time.

Description

Configuration method and device of sidelink, communication equipment and storage medium
Technical Field
The embodiments of the present disclosure relate to the field of wireless communications, but not limited to the field of wireless communications, and in particular, to a method and an apparatus for configuring a sidelink, a communication device, and a storage medium.
Background
Vehicle to electrical (V2X) is a new generation of information communication technology that connects a Vehicle to Everything. V2X may provide two communication interfaces, respectively referred to as Uu interface (cellular communication interface) and PC5 interface (direct communication interface).
Based on the situation that the spectrum demand of an operator is increasing day by day, but the actual spectrum that can be allocated for use is decreasing gradually, it is a great demand of the operator at present to transmit the NR licensed spectrum service and the NR V2X service simultaneously on the licensed spectrum for the existing licensed band of the operator. For the terminal, direct communication is realized through a Sidelink (SL). However, there is no mature method for how to implement the handover between the two services and ensure less interference in the device on the basis that the terminal can use the two services simultaneously.
Disclosure of Invention
The present disclosure provides a configuration method and apparatus of SL (SideLink), a communication device, and a storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided a configuration method of a SL, where the method is performed by a terminal, and includes:
reporting network switching time supported by the terminal, wherein the network switching time is the time for the terminal to switch the network between the SL and the NR (New Radio, new air interface);
receiving a guard interval of the SL configured based on the network switching time.
In some embodiments, the guard interval is used for network switching between the SL and the NR by the terminal within a period of the SL guard interval.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL timeslot.
In some embodiments, the guard interval has a duration that is an integer multiple of a single symbol duration.
In some embodiments, the method further comprises:
receiving indication information for indicating the terminal to report the network switching time;
the reporting of the network switching time supported by the terminal includes:
and reporting the network switching time according to the indication information.
According to a second aspect of the embodiments of the present disclosure, there is provided a configuration method of a SL, the method being performed by a network device, including:
receiving network switching time supported by a terminal, wherein the network switching time is the time for the terminal to switch a network between the SL and the NR;
transmitting a guard interval of the SL configured based on the network switching time.
In some embodiments, the guard interval is provided for the terminal to perform network switching between the SL and the NR within a period of the SL's guard interval.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL slot.
In some embodiments, the method further comprises:
configuring a guard interval of the SL according to the network switching time, a timing advance value of the terminal, and an SCS (Subcarrier Spacing) value of the SL carrier.
In some embodiments, the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value, and the duration required for the terminal power to change.
In some embodiments, the time duration required for the terminal power change includes:
the sum of the time length of the terminal for switching the power of SL from the on state to the off state and the time length of the terminal for switching the power of NR from the off state to the on state; or
The sum of the duration of the terminal for switching the power of NR from the on state to the off state and the duration of the terminal for switching the power of SL from the off state to the on state.
In some embodiments, the method further comprises:
determining the time length of a single symbol according to the SCS value; wherein the duration of the guard interval is an integer multiple of the duration of a single symbol.
In some embodiments, the method further comprises:
sending indication information for indicating the terminal to report the network switching time;
the network switching time supported by the receiving terminal comprises:
and receiving the network switching time reported by the terminal based on the indication information.
According to a third aspect of the embodiments of the present disclosure, there is provided a configuration apparatus of a SL, the apparatus being applied to a terminal, including:
a reporting module configured to report network switching time supported by the terminal, wherein the network switching time is a time for the terminal to switch a network between the SL and the NR;
a first receiving module configured to receive a guard interval of the SL configured based on the network switching time.
In some embodiments, the guard interval is used for network switching between the SL and the NR by the terminal within a period of the SL guard interval.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL slot.
In some embodiments, the guard interval has a duration that is an integer multiple of a single symbol duration.
In some embodiments, the apparatus further comprises:
the second receiving module is configured to receive indication information indicating that the terminal reports the network switching time;
the reporting module includes:
and the reporting submodule is configured to report the network switching time according to the indication information.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a configuration apparatus of a SL, the apparatus being applied to a network device, including:
a third receiving module, configured to receive a network switching time supported by a terminal, where the network switching time is a time when the terminal switches a network between the SL and the NR;
a first transmitting module configured to transmit a guard interval of the SL configured based on the network switching time.
In some embodiments, the guard interval is used for the terminal to perform network switching between the SL and the NR within a period of the SL guard interval.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL slot.
In some embodiments, the apparatus further comprises:
a processing module configured to configure a guard interval of the SL according to the network switching time, the timing advance value of the terminal, and the SCS value of the SL carrier.
In some embodiments, the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value, and the duration required for the terminal power change.
In some embodiments, the time duration required for the terminal power change includes:
the sum of the duration of switching the power of the terminal from the open state to the closed state at SL and the duration of switching the power of the terminal from the closed state to the open state at NR; or
The sum of the time length of the terminal for switching the power of NR from the on state to the off state and the time length of the terminal for switching the power of SL from the off state to the on state.
In some embodiments, the apparatus further comprises:
a determining module configured to determine a duration of a single symbol according to the SCS value; wherein the duration of the guard interval is an integer multiple of the duration of a single symbol.
In some embodiments, the apparatus further comprises:
the second sending module is configured to send indication information for indicating the terminal to report the network switching time;
the third receiving module includes:
and the receiving submodule is configured to receive the network switching time reported by the terminal based on the indication information.
According to a fifth aspect of embodiments of the present disclosure, there is provided a communication apparatus including at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is configured to execute the executable instructions, and the executable instructions perform the steps in any SL configuration method described above.
According to a sixth aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, implement the steps in the configuration method of any SL described above.
The embodiment of the disclosure provides a configuration method and a configuration device of a Subscriber Line (SL), communication equipment and a storage medium. According to the technical scheme of the embodiment of the disclosure, the terminal reports the network switching time according to the capability of the terminal and receives the SL protection interval configured based on the network switching time. Therefore, when the terminal performs network switching between the SL and the NR, the terminal can perform switching by using the time interval of the protection interval of the SL, thereby improving the switching efficiency, saving the time occupied by the switching time and the NR time slot and improving the spectrum utilization efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the embodiments.
Fig. 1 is a block diagram illustrating a wireless communication system in accordance with an exemplary embodiment;
FIG. 2 is a flow chart one illustrating a method of configuration of a SL in accordance with an exemplary embodiment;
fig. 3 is a schematic diagram illustrating the structure of a SL communication system according to an exemplary embodiment;
FIG. 4 is a flowchart II illustrating a configuration method of a SL according to an exemplary embodiment;
FIG. 5 is a flowchart three illustrating a configuration method of a SL according to an exemplary embodiment;
fig. 6 is a time axis diagram illustrating SL traffic and NR traffic according to an exemplary embodiment;
FIG. 7 is a flow chart diagram four illustrating a configuration method of a SL in accordance with an exemplary embodiment;
FIG. 8 is a schematic diagram illustrating SL to NR switching principles according to an exemplary embodiment;
fig. 9 is a block diagram illustrating a configuration apparatus of a SL according to an exemplary embodiment;
fig. 10 is a block diagram of a configuration device of a SL according to an exemplary embodiment;
FIG. 11 is a first block diagram illustrating a communications device in accordance with an exemplary embodiment;
fig. 12 is a schematic structural diagram two of a communication device shown in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with embodiments of the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosed embodiments, as detailed in the appended claims.
The terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information in the embodiments of the present disclosure, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The words "if" and "if" as used herein may be interpreted as "at ...whenor" when ..., when or "in response to a determination", depending on the context.
In order to better describe any embodiment of the present disclosure, an embodiment of the present disclosure is exemplarily illustrated by taking an application scenario of access control as an example.
Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: several terminals 11 and several base stations 12.
Terminal 11 may refer to, among other things, a device that provides voice and/or data connectivity to a user. The terminal 11 may communicate with one or more core networks via a Radio Access Network (RAN), and the terminal 11 may be an internet of things terminal, such as a sensor device, a mobile phone (or called "cellular" phone), and a computer having the internet of things terminal, and may be a fixed, portable, pocket, handheld, computer-embedded, or vehicle-mounted device, for example. For example, a Station (STA), a subscriber unit (subscriber unit), a subscriber Station (subscriber Station), a mobile Station (mobile), a remote Station (remote Station), an access point (ap), a remote terminal (remote terminal), an access terminal (access terminal), a user equipment (user terminal), a user agent (user agent), a user equipment (user device), or a user terminal (user equipment, terminal). Alternatively, the terminal 11 may be a device of an unmanned aerial vehicle. Alternatively, the terminal 11 may also be a vehicle-mounted device, for example, a vehicle computer with a wireless communication function, or a wireless terminal externally connected to the vehicle computer. Alternatively, the terminal 11 may be a roadside device, for example, a street lamp, a signal lamp or other roadside device having a wireless communication function.
The base station 12 may be a network side device in a wireless communication system. The wireless communication system may be the fourth generation mobile communication (4 g) system, which is also called Long Term Evolution (LTE) system; alternatively, the wireless communication system may also be a 5G system, which is also called a New Radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may be a next generation system of a 5G system. Among them, the Access Network in the 5G system may be referred to as NG-RAN (New Generation-Radio Access Network, new Generation Radio Access Network).
The base station 12 may be an evolved node b (eNB) used in a 4G system. Alternatively, the base station 12 may be a base station (gNB) adopting a centralized distributed architecture in the 5G system. When the base station 12 adopts a centralized distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DU). A Packet Data Convergence Protocol (PDCP) layer, a Radio Link layer Control Protocol (RLC) layer, and a Media Access Control (MAC) layer are provided in the central unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.
The base station 12 and the terminal 11 may establish a wireless connection over a wireless air interface. In various embodiments, the wireless air interface is based on a fourth generation mobile communication network technology (4G) standard; or the wireless air interface is based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G next generation mobile communication network technology standard.
In some embodiments, an E2E (End to End) connection may also be established between the terminals 11. Such as a vehicle to vehicle (V2V) communication, a vehicle to Infrastructure (V2I) communication, and a vehicle to peer (V2P) communication in a vehicle to internet communication (V2X).
In some embodiments, the wireless communication system may further include a network management device 13.
Several base stations 12 are connected to a network management device 13, respectively. The network Management device 13 may be a Core network device in a wireless communication system, for example, the network Management device 13 may be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC). Alternatively, the Network management device may also be other core Network devices, such as a Serving GateWay (SGW), a Public Data Network GateWay (PGW), a Policy and Charging Rules Function (PCRF), a Home Subscriber Server (HSS), or the like. As to the implementation form of the network management device 13, the embodiment of the present disclosure is not limited.
Vehicle to electrical (V2X) is a new generation of information communication technology that connects a Vehicle to Everything. V2X may provide two types of communication interfaces, referred to as a Uu interface (cellular communication interface) and a PC5 interface (direct communication interface), respectively.
Based on the situation that the spectrum demand of an operator is increasing day by day, but the actual spectrum that can be allocated for use is decreasing gradually, it is a great demand of the operator at present to transmit the NR licensed spectrum service and the NR V2X service simultaneously on the licensed spectrum for the existing licensed band of the operator. For a terminal, it will be a very common scenario to perform handover between NR licensed spectrum service and NR Sidelink service on the same frequency band. At present, no mature method exists how to effectively realize the switching of two services in a terminal and ensure small interference in equipment.
Therefore, based on the above service switching scenario, as shown in fig. 2, an embodiment of the present disclosure provides a configuration method of an SL, where the method is executed by a terminal, and includes:
step S101, reporting network switching time supported by the terminal, wherein the network switching time is the time for switching the network between the SL and the NR by the terminal;
step S102, receiving the protection interval of the SL configured based on the network switching time.
In the embodiment of the present disclosure, in order to support direct communication between UEs, a sidelink or direct link (SL) communication method is introduced. As shown in fig. 3, a plurality of terminals 11 are directly connected to each other through SL. According to the corresponding relation between the sending and receiving UE, three transmission modes, unicast, multicast and broadcast, are supported on SL. Direct communication between different UEs can be performed through SL without going through the base station.
In the embodiment of the present disclosure, the terminal may be a UE supporting the above direct communication, and meanwhile, the terminal also supports network communication in an NR service, that is, the terminal performs communication through a network device such as a 5G base station.
The terminal may use the same or different authorized spectrum during the communication between the SL and the NR, and if the terminal wants to perform network handover, it needs a certain handover time to handover the communication link.
For direct communication, each SL timeslot has a Guard Period (GP), and a network device such as a base station may configure a terminal with a SL Guard Period. Based on the SL frame structure, the last symbol of the SL slot is left empty as the guard interval.
In the embodiment of the present disclosure, the network switching may be performed by using the guard interval of the SL timeslot. That is to say, in the period of the protection interval of the SL timeslot, the switching between the SL and the NR is performed, so that the time-frequency resource is fully utilized, the spectrum utilization rate is improved, and the switching rate is improved.
Based on the capability of the terminal, the time length required for network handover may be different, and therefore, in the embodiment of the present disclosure, the terminal may report the network handover time required for network handover to the network device. After receiving the network switching time reported by the terminal, the network device may configure a protection interval of the SL based on the network switching time. For example, the duration of the guard interval may cover the duration of the network handover performed by the terminal, and thus the guard interval greater than or equal to the network handover time may be configured.
It should be noted that, when the terminal performs network handover, the required time duration may not only include the network handover time, but also may be affected by time such as power change of a network signal and timing advance between uplink and downlink, and therefore, the time duration of the guard interval may be greater than the network handover time, so that the whole network handover process is performed in the guard interval as much as possible, and thus, the time occupation on the NR timeslot is reduced.
And the terminal reports the network switching time according to the self capacity and receives the SL protection interval configured based on the network switching time. Therefore, when the terminal performs network switching between the SL and the NR, the terminal can perform switching by using the time interval of the protection interval of the SL, thereby improving the switching efficiency, saving the time occupied by the switching time and the NR time slot and improving the spectrum utilization efficiency.
In some embodiments, the guard interval is used for network switching between the SL and the NR by the terminal within a period of the SL guard interval.
In the embodiment of the present disclosure, the symbol corresponding to the guard interval is left blank, so that no data transmission is performed in the guard interval in the SL timeslot. Therefore, the terminal can perform the above network switching within the period of the guard interval. Therefore, network switching can not occupy time corresponding to the NR time slot, and further switching efficiency and frequency spectrum utilization rate can be improved.
In some embodiments, the guard interval is the number of symbols that are blank at the end of the SL slot.
In the embodiment of the present disclosure, the guard interval of the SL may be configured to 1 or more symbols in units of symbols corresponding to SL slots according to the network switching time of the terminal. The time length corresponding to the one or more symbol numbers can cover the network switching time, thereby facilitating the network switching of the terminal in the time interval of the guard interval.
In some embodiments, the guard interval has a duration that is an integer multiple of a single symbol duration.
It should be noted that the duration of a single symbol in the SL timeslot may be determined by the SCS value of the SL carrier of the terminal. Accordingly, the duration of the guard interval may be greater than or equal to the network switching time, and may be an integer multiple of a single symbol duration determined based on the SCS value. That is, for the SL carrier of the terminal, the duration of each single symbol is a fixed value, and the network device may configure several symbols as the guard interval based on the network switching time of the terminal. Thus, the duration of the guard interval is an integer multiple of the duration of a single symbol.
As shown in fig. 4, a configuration method of an SL provided in the embodiment of the present disclosure includes:
step S201, receiving indication information for indicating the terminal to report the network switching time;
and step S202, reporting the network switching time according to the indication information.
In the embodiment of the present disclosure, the terminal may report the network switching time of the terminal based on the indication of the network device. Therefore, when the terminal receives the indication information indicating the network switching time reported thereon, the terminal can report the network switching time based on the indication information, thereby facilitating the network device to configure the corresponding protection interval of the SL.
As shown in fig. 5, an embodiment of the present disclosure provides a configuration method of a SL, where the method is performed by a network device, and includes:
step S301, receiving network switching time supported by a terminal, wherein the network switching time is the time for the terminal to switch a network between the SL and the NR;
step S302, sending the protection interval of the SL configured based on the network switching time.
In the embodiments of the present disclosure, the network device may be a base station or other device capable of providing network services for the terminal. The terminal may be a UE supporting the direct communication, and meanwhile, the terminal also supports network communication in an NR service, that is, the terminal performs communication through a network device such as a 5G base station.
The network device is used for configuring parameters related to the SL for the terminal, including time-frequency information occupied by the SL, frame structure of the SL and other information.
In the embodiment of the present disclosure, in order to make the terminal utilize the guard interval in the SL timeslot as much as possible when performing network handover, the network device may configure the corresponding guard interval according to the network handover time reported by the terminal.
Therefore, when the terminal performs network switching between the SL and the NR, the terminal can perform switching by using the time interval of the guard interval of the SL, thereby improving the switching efficiency, saving the time occupied by the switching time on the NR time slot and improving the spectrum utilization efficiency.
In some embodiments, the guard interval is provided for the terminal to perform network switching between the SL and the NR within a period of the SL's guard interval.
In the embodiment of the present disclosure, a symbol corresponding to a guard interval configured by a network device is left blank, so that no data transmission is performed in the guard interval in the SL timeslot. Therefore, the terminal can perform the above network switching within the period of the guard interval. Therefore, network switching can not occupy time corresponding to the NR time slot, and further switching efficiency and frequency spectrum utilization rate can be improved.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL slot.
In the embodiment of the present disclosure, the guard interval of the SL may be configured to 1 or more symbol numbers in units of symbols corresponding to SL slots according to the network switching time of the terminal. The time length corresponding to the one or more symbol numbers can cover the network switching time, so that the terminal can conveniently perform network switching in the time interval of the guard interval.
In some embodiments, the method further comprises:
configuring the protection interval of the SL according to the network switching time, the timing advance value of the terminal and the SCS value of the SL carrier.
When considering the switching between the time slot of the NR grant spectrum service and the SL service, the synchronization between the time slots of the two services needs to be considered. When the base station is used as a synchronization source in the coverage area of the base station, a timing advance (T) corresponding to an NR uplink slot exists between two slots TA ) The time difference of (a). Specifically, for the service of the terminal authorized spectrum, due to the Time Advance (TA) mechanism, UL (Uplink) transmission is to be received ahead of DL (Downlink) to ensure that Uplink subframes of multiple terminals are aligned in Time when arriving at the base station after passing through different paths, and the value of the Advance is N TA,SL And N TA_offset Two groups of parameters are determined together, and the two are added to form T TA . In SL service, N TA,SL And N TA_offset Are all set to 0. That is, the terminal transmits the SL signal immediately after receiving the downlink signal of the licensed spectrum. In this case, terminal SL transmission is time aligned with terminal DL reception. Combining the two cases, there is therefore a T between the time slots of NR and SL TA Long time overlap, as shown in FIG. 6, this takes into account bothInter-switching and when using the guard interval is taken into account.
Based on the SL frame structure, the last symbol of its slot is left empty as GP, i.e., the guard interval. Therefore, the switching from the SL service to the NR authorized spectrum service is realized in the guard interval, and the existing guard interval time can be utilized to save the occupied time of the switching time on the NR timeslot, so as to improve the utilization efficiency of the spectrum and improve the switching speed. While at the same time it should be noted that the guard interval GP should be able to cover the switching time Ts.
Considering that GP itself is 1 symbol, the specific time length of GP is directly related to SCS, and the value of Ts, T TA The timing advance configured for the network, and Switching Period, that is, the network Switching time reported by the terminal is related to the terminal capability, so as to ensure GP>Ts, the network device may configure the SL guard interval according to the network switching time, the terminal timing advance value, and the SCS value of the SL carrier.
In some embodiments, the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value, and the duration required for the terminal power to change.
The switching between NR and SL needs to consider the process from existence to nonexistence of SL carrier power and the process from nonexistence to existence of NR carrier power, besides the network switching time, timing advance value and the like involved in the above embodiments, and exemplarily, this process needs 2 × transient period (twice the switching time), and 2 × transient period is a fixed value, for example, 20us. The actual switching time Ts is therefore: ts =2 × transient period + Switching period + T TA . That is, in the whole handover process of the terminal, the duration of the SL carrier power, the duration corresponding to the network handover time, the duration corresponding to the timing advance value, and the duration of the NR carrier power, which vary from none to none, need to pass. Therefore, when the guard interval is determined, the sum of the durations of the several periods can be used as a reference value, and the duration of the guard interval needs to be greater than the total duration, so that the whole switching process is performed at the guard intervalThe process is carried out within a time range.
Thus, the duration of the guard interval may cover the duration of Ts, so as to ensure that the whole switching process is performed within the period of the guard interval.
In some embodiments, the time duration required for the terminal power change includes:
the sum of the duration of switching the power of the terminal from the open state to the closed state at SL and the duration of switching the power of the terminal from the closed state to the open state at NR; or
The sum of the duration of the terminal for switching the power of NR from the on state to the off state and the duration of the terminal for switching the power of SL from the off state to the on state. In this disclosure, the network switching of the terminal may be a switching process from an SL service to an NR service, and therefore, the duration required for the power change includes a sum of a duration in which the power of the SL is converted from an on state to an off state and a duration in which the power of the NR is converted from an off state to an on state. In addition, the network switching of the terminal may also be a switching process from an NR service to an SL service, and therefore, the power change may also include a sum of a duration in which the power of the NR is converted from the on state to the off state and a duration in which the power of the SL is converted from the off state to the on state.
The NR service and the SL service have a corresponding synchronous time axis, so that no matter what conversion relationship is, the conversion can be performed on the time axis by using the guard interval period corresponding to the SL service. In the embodiment of the present disclosure, the duration of the guard interval may be configured according to one of the durations as the duration required by the power change.
Of course, in order to make the switching process be performed within the time period of the guard interval in any switching process, the duration of the guard interval may be determined according to the longer one of the two power variation durations.
In some embodiments, the method further comprises:
determining the time length of a single symbol according to the SCS value; wherein the duration of the guard interval is an integral multiple of the duration of a single symbol.
In the disclosed embodiment, the single symbol duration of the SL slot is determined by the SCS value, which is determined based on the frequency band, phase noise, and doppler shift, etc. corresponding to the SL communication. Therefore, the SCS values configured for different terminals may be different based on the application scenarios of the different terminals.
Here, the network device may determine the duration of a single symbol of the SL timeslot according to the SCS value corresponding to the terminal, and further determine the number of symbols corresponding to the guard interval according to parameters such as network switching time reported by the terminal. Therefore, the duration of the guard interval is an integral multiple of the duration of a single symbol, and the duration can cover the duration required by the terminal for network handover.
In some embodiments, the method further comprises:
sending indication information for indicating the terminal to report the network switching time;
the network switching time supported by the receiving terminal comprises:
and receiving the network switching time reported by the terminal based on the indication information.
In the embodiment of the present disclosure, the network device configures the guard interval of the terminal, and therefore, the network device may instruct the terminal to report the network switching time corresponding to the terminal capability for configuring the guard interval. When receiving the network switching time reported by the terminal based on the indication information sent by the network device, the network device may configure the SL of the terminal based on the network switching time, and determine the number of symbols corresponding to the guard interval. The network equipment can send the configured network interval to the terminal, and then the terminal is convenient for switching by using the time length of the guard interval when the network is switched, so that the occupation of the NR time slot is reduced, the switching efficiency is improved, and the frequency spectrum utilization rate is improved.
The disclosed embodiments also provide the following examples:
the embodiment of the present disclosure provides a switching method for implementing higher spectrum utilization efficiency by placing a switching process in GP in combination with the GP of SL for switching between NR and NR Sidelink services on an authorized spectrum, i.e., the above-mentioned SL services. Meanwhile, considering the situation that Ts > GP possibly exists between the switching time Ts and the guard interval GP, namely the situation that the switching process cannot be completely placed in the GP, a method for adjusting GP is provided.
In the embodiment of the disclosure, the terminal reports the shortest NR and SL switching time T supported by the terminal NRsidelinkswitch The network combines the switching time reported by the terminal with the timing advance T configured by the terminal at the current moment TA And the value and the SCS value of the SL carrier are used for determining the number of symbols which need to be left empty at the end of the SL time slot needing to be configured as a guard interval GP, and the terminal can complete the switching from SL to NR in the GP time period.
As shown in fig. 7, the configuration method of the SL provided by the embodiment of the present disclosure includes the following steps:
step S401, the base station sends an indication terminal to report the switching capability of NR and SL, namely network switching time, to the terminal;
step S402, the terminal reports the longest network switching time supported by the terminal;
step S403, the base station determines the last number of symbols of the SL time slot which needs to be configured as GP according to the feedback switching time;
and step S404, the base station sends the configured symbol number of the GP to the terminal.
The number of symbols of the GP configured by the base station may be determined by the following equation 1:
Figure GDA0003032431010000121
wherein, ceiling stands for rounding up;
T NRsidelinkswitch the switching time capability reported by the representative terminal takes us (microseconds) as a unit;
T TA representing a timing advance value configured for the terminal by the current network equipment, taking us as a unit;
illustratively, in the above formula (1), the sum of the time lengths required for the process from the existence of the SL carrier power to the existence of the SL carrier power and the process from the existence of the NR carrier power to the existence of the NR carrier power is 20us.
Figure GDA0003032431010000122
Wherein, SCS is subcarrier spacing in kHz (kilohertz).
In the embodiment of the disclosure, the terminal reports to the network device according to the capability, and T of the terminal NRsidelinkswitch ＝20us，T TA The SCS of the carrier configured to be 20us, sl is 15kHz, then according to the above equation 1, the number of symbols of GP calculated by the network side is the following equation 2:
GP＝Ceiling(60/71)＝1 (2)
the last symbol of SL configured by the network device is used as GP, the duration of this GP is 71us, the terminal completes the period of change from the SL power to the off power, and then switches from SL to NR, the period of change from the off power to the on power, and the timing advance, as shown in fig. 8, it takes 60us in total to complete the whole switching process, and the whole can be located in one symbol of the GP. The whole switching process is carried out in GP, so that time slots and symbols of SL and NR are not occupied, and the spectrum efficiency of the network is improved as a whole.
As shown in fig. 9, an embodiment of the present disclosure further provides a configuration apparatus 900 for a SL, which is applied to a terminal and includes:
a reporting module 901, configured to report network switching time supported by the terminal, where the network switching time is time for the terminal to switch a network between the SL and the NR;
a first receiving module 902 configured to receive a guard interval of the SL configured based on the network switching time.
In some embodiments, the guard interval is used for network switching between the SL and the NR by the terminal within a period of the SL guard interval.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL slot.
In some embodiments, the guard interval has a duration that is an integer multiple of a single-symbol duration.
In some embodiments, the apparatus further comprises:
the second receiving module is configured to receive indication information indicating that the terminal reports the network switching time;
the reporting module includes:
and the reporting submodule is configured to report the network switching time according to the indication information.
As shown in fig. 10, an SL configuration apparatus 1000 provided in an embodiment of the present disclosure is applied to a network device, and includes:
a third receiving module 1001 configured to receive a network switching time supported by a terminal, where the network switching time is a time when the terminal switches a network between the SL and the NR;
a first sending module 1002 configured to send a guard interval of the SL configured based on the network switching time.
In some embodiments, the guard interval is used for the terminal to perform network switching between the SL and the NR within a period of the SL guard interval.
In some embodiments, the SL guard interval is the number of symbols that are blank at the end of the SL slot.
In some embodiments, the apparatus further comprises:
a processing module configured to configure a guard interval of the SL according to the network switching time, the timing advance value of the terminal, and the SCS value of the SL carrier.
In some embodiments, the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value, and the duration required for the terminal power change.
In some embodiments, the time duration required for the terminal power change includes:
the sum of the duration of switching the power of the terminal from the open state to the closed state at SL and the duration of switching the power of the terminal from the closed state to the open state at NR; or
The sum of the time length of the terminal for switching the power of NR from the on state to the off state and the time length of the terminal for switching the power of SL from the off state to the on state.
In some embodiments, the apparatus further comprises:
a determining module configured to determine a duration of a single symbol according to the SCS value; wherein the duration of the guard interval is an integral multiple of the duration of a single symbol.
In some embodiments, the apparatus further comprises:
the second sending module is configured to send indication information for indicating the terminal to report the network switching time;
the third receiving module includes:
and the receiving submodule is configured to receive the network switching time reported by the terminal based on the indication information.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 11 is a block diagram of a communication device according to an embodiment of the present disclosure. The communication device may be a terminal, such as a user equipment UE or the like as referred to in any of the above embodiments. For example, the communication device 1100 can be a mobile phone, a computer, a digital broadcast user device, a messaging device, a gaming console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 11, a communication device 1100 may include at least one of the following components: processing component 1102, memory 1104, power component 1106, multimedia component 1108, audio component 1110, input/output (I/O) interfaces 1112, sensor component 1114, and communications component 1116.
The processing component 1102 generally controls the overall operation of the communication device 1100, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 1102 may include at least one processor 1120 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 1102 may include at least one module that facilitates interaction between the processing component 1102 and other components. For example, the processing component 1102 may include a multimedia module to facilitate interaction between the multimedia component 1108 and the processing component 1102.
The memory 1104 is configured to store various types of data to support operation at the communication device 1100. Examples of such data include instructions for any application or method operating on the communication device 1100, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1104 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power component 1106 provides power to the various components of the communication device 1100. The power components 1106 may include a power management system, at least one power source, and other components associated with generating, managing, and distributing power for the communication device 1100.
The multimedia component 1108 includes a screen that provides an output interface between the communication device 1100 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes at least one touch sensor to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect a wake-up time and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1108 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the communication device 1100 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 1110 is configured to output and/or input audio signals. For example, the audio component 1110 includes a Microphone (MIC) configured to receive external audio signals when the communication device 1100 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 1104 or transmitted via the communication component 1116. In some embodiments, the audio assembly 1110 further includes a speaker for outputting audio signals.
The I/O interface 1112 provides an interface between the processing component 1102 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 1114 includes at least one sensor for providing various aspects of state assessment for the communication device 1100. For example, the sensor component 1114 can detect an open/closed state of the communication device 1100, the relative positioning of components such as a display and keypad of the communication device 1100, the sensor component 1114 can also detect a change in position of the communication device 1100 or a component of the communication device 1100, the presence or absence of user contact with the communication device 1100, orientation or acceleration/deceleration of the communication device 1100, and a change in temperature of the communication device 1100. Sensor assembly 1114 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 1114 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1114 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 1116 is configured to facilitate wired or wireless communication between the communication device 1100 and other devices. The communication device 1100 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 1116 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1116 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the communication device 1100 may be implemented by at least one Application Specific Integrated Circuit (ASIC), digital Signal Processor (DSP), digital Signal Processing Device (DSPD), programmable Logic Device (PLD), field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor or other electronic component for performing the above-described method.
In an exemplary embodiment, a non-transitory computer readable storage medium including instructions, such as the memory 1104 including instructions, executable by the processor 1120 of the communication device 1100 to perform the method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
As shown in fig. 12, an embodiment of the present disclosure shows a structure of another communication device. The communication device may be a base station and other network devices according to embodiments of the present disclosure. For example, the communication device 1200 may be provided as a network device. Referring to fig. 12, communications device 1200 includes a processing component 1222 that further includes at least one processor, and memory resources, represented by memory 1232, for storing instructions, such as application programs, that are executable by processing component 1222. The application programs stored in memory 1232 may include one or more modules that each correspond to a set of instructions. Further, the processing component 1222 is configured to execute instructions to perform any of the methods of the aforementioned methods as applied to the communication device.
The communication device 1200 may also include a power component 1226 configured to perform power management of the communication device 1200, a wired or wireless network interface 1250 configured to connect the communication device 1200 to a network, and an input output (I/O) interface 1258. The communications device 1200 may operate based on an operating system stored in memory 1232, such as Windows Server, mac OS XTM, unixTM, linuxTM, freeBSDTM, or the like.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (20)

1. A configuration method of a sidelink SL, wherein the method is executed by a terminal and comprises the following steps:
reporting network switching time supported by the terminal, wherein the network switching time is the time for the terminal to switch the network between the SL and the new air interface NR;
receiving a guard interval of the SL configured based on the network switching time, wherein the guard interval is used for the terminal to perform communication link switching between the SL and the NR within a period of the protection interval of the SL; the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value and the duration required by the terminal power change.
2. The method of claim 1, wherein the SL guard interval is a number of symbols that are blank at the end of the SL slot.
3. The method of claim 1, wherein the guard interval has a duration that is an integer multiple of a single symbol duration.
4. The method of any of claims 1 to 3, wherein the method further comprises:
receiving indication information for indicating the terminal to report the network switching time;
the reporting of the network switching time supported by the terminal includes:
and reporting the network switching time according to the indication information.
5. A configuration method of SL, wherein the method is performed by a network device, comprising:
receiving network switching time supported by a terminal, wherein the network switching time is the time for the terminal to switch a network between the SL and the NR;
transmitting a guard interval of the SL configured based on the network switching time, wherein the guard interval is used for the terminal to perform communication link switching between the SL and the NR within a period of the SL guard interval; the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value and the duration required by the terminal power change.
6. The method of claim 5, wherein the SL guard interval is the number of symbols that are blank at the end of the SL slot.
7. The method of claim 5, wherein the duration of time required for the terminal power to change comprises:
the sum of the duration of switching the power of the terminal from the open state to the closed state at SL and the duration of switching the power of the terminal from the closed state to the open state at NR; or
The sum of the time length of the terminal for switching the power of NR from the on state to the off state and the time length of the terminal for switching the power of SL from the off state to the on state.
8. The method of claim 5, wherein the method further comprises:
determining the duration of a single symbol according to the SCS value; wherein the duration of the guard interval is an integral multiple of the duration of a single symbol.
9. The method of any of claims 5 to 8, wherein the method further comprises:
sending indication information for indicating the terminal to report the network switching time;
the network switching time supported by the receiving terminal comprises:
and receiving the network switching time reported by the terminal based on the indication information.
10. A configuration apparatus of SL, wherein the apparatus is applied to a terminal, comprising:
a reporting module configured to report network switching time supported by the terminal, wherein the network switching time is time for the terminal to switch a network between the SL and the NR;
a first receiving module configured to receive a guard interval of the SL configured based on the network switching time, wherein the guard interval is used for the terminal to perform communication link switching between the SL and the NR within a period of the guard interval of the SL; the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value and the duration required by the terminal power change.
11. The apparatus of claim 10, wherein the SL guard interval is a number of symbols that are blank at an end of the SL slot.
12. The apparatus of claim 10, wherein the guard interval has a duration that is an integer multiple of a single-symbol duration.
13. The apparatus of any of claims 10 to 12, wherein the apparatus further comprises:
the second receiving module is configured to receive indication information indicating that the terminal reports the network switching time;
the reporting module includes:
and the reporting submodule is configured to report the network switching time according to the indication information.
14. A configuration device of SL, wherein the device is applied to network equipment, comprising:
a third receiving module, configured to receive a network switching time supported by a terminal, where the network switching time is a time when the terminal switches a network between the SL and the NR;
a first sending module configured to send a guard interval of the SL configured based on the network switching time, wherein the guard interval is used for the terminal to perform communication link switching between the SL and the NR within a period of the guard interval of the SL; the duration of the guard interval is greater than or equal to the sum of the network switching time, the timing advance value and the duration required by the terminal power change.
15. The apparatus of claim 14, wherein the SL guard interval is a number of symbols that are blank at the end of the SL slot.
16. The apparatus of claim 14, wherein the duration of time required for the terminal power to change comprises:
the sum of the duration of switching the power of the terminal from the open state to the closed state at SL and the duration of switching the power of the terminal from the closed state to the open state at NR; or
The sum of the duration of the terminal for switching the power of NR from the on state to the off state and the duration of the terminal for switching the power of SL from the off state to the on state.
17. The apparatus of claim 14, wherein the apparatus further comprises:
a determining module configured to determine a duration of a single symbol according to the SCS value; wherein the duration of the guard interval is an integral multiple of the duration of a single symbol.
18. The apparatus of any of claims 14 to 17, wherein the apparatus further comprises:
the second sending module is configured to send indication information for indicating the terminal to report the network switching time;
the third receiving module includes:
and the receiving submodule is configured to receive the network switching time reported by the terminal based on the indication information.
19. A communication device, wherein the communication device comprises at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is configured to execute the executable instructions to perform the steps of the SL configuration method provided in any of the preceding claims 1 to 4 or 5 to 9 when the processor is configured to execute the executable instructions.
20. A non-transitory computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, implement the steps in the configuration method of the SL provided in any of claims 1 to 4 or 5 to 9 above.
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