CN108600974B - Signaling indication method, device and storage medium - Google Patents

Signaling indication method, device and storage medium Download PDF

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Publication number
CN108600974B
CN108600974B CN201810398651.9A CN201810398651A CN108600974B CN 108600974 B CN108600974 B CN 108600974B CN 201810398651 A CN201810398651 A CN 201810398651A CN 108600974 B CN108600974 B CN 108600974B
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time
channel
slot
user equipment
indication signaling
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CN108600974A (en
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李明菊
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen 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
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application discloses a signaling indication method, which comprises the following steps: detecting a channel; when the channel is detected to be in an idle state, determining the occupied time of the channel; and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used for downlink transmission and the time slot or symbol used for uplink transmission in the channel occupation time. The embodiment of the application also discloses a signaling indicating device and a storage medium. By adopting the embodiment of the application, the power consumption can be reduced and the time delay can be reduced.

Description

Signaling indication method, device and storage medium
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a signaling indication method, an apparatus, and a storage medium.
Background
In New Radio technology (NR), a slot contains 14 symbols, and the slot format contains three types: first, 14 symbols are all used for downlink transmission; second, 14 symbols are all used for uplink transmission; in the third category, the 14 symbols include at least two of symbols for downlink transmission, uncertain symbols, and symbols for uplink transmission. In the NR grant spectrum, the slot format supports radial state configuration, which is given by Radio Resource Control (RRC) signaling. Meanwhile, dynamic configuration is supported, and Slot Format Indication (SFI) in Downlink Control Information (DCI) signaling of group common (group common) is explicitly given or time domain scheduling Information (td) in DCI signaling of user equipment (UE specific) is implicitly given.
Whereas in NR unlicensed (unisense), it is not possible to predict in advance whether the channel is free or not due to channel uncertainty. When it is detected that the channel is idle and the channel occupation time is obtained, if the base station does not inform the user equipment of the structures of downlink transmission and uplink transmission within the channel occupation time, the user equipment needs to monitor the DCI information all the time, which increases the power consumption of the user equipment. In addition, if the ue does not know which timeslots or symbols are available for uplink, the ue must send a scheduling request to the base station and then receive a scheduling grant from the base station before uplink transmission is performed, which increases the delay of uplink transmission.
Disclosure of Invention
The embodiment of the application provides a signaling indication method, a signaling indication device and a storage medium, which can reduce the power consumption of user equipment and the time delay of uplink transmission.
In a first aspect, an embodiment of the present application provides a signaling indication method, including:
detecting a channel;
when the channel is detected to be in an idle state, determining the occupied time of the channel;
and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used for downlink transmission and the time slot or symbol used for uplink transmission in the channel occupation time.
Before the base station sends the indication signaling to the user equipment, the method further includes:
determining the number of switching points in the channel occupation time, wherein the number of the switching points is the number of times of converting the downlink transmission into the uplink transmission;
and dividing the channel occupation time into at least one time period according to the number of the switching points, wherein each time period comprises a time slot or a symbol used by the downlink transmission and a time slot or a symbol used by the uplink transmission.
Wherein the determining the number of switching points within the channel occupation time comprises:
acquiring the service type of transmission data;
and determining the number of the switching points in the occupied time of the channel according to the service type.
Wherein the determining the number of switching points within the channel occupation time comprises:
determining a time length of the channel occupancy time;
and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time.
Wherein the determining the number of switching points within the channel occupation time comprises:
determining the frequency range of the channel;
and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel.
After determining the number of switching points in the channel occupation time, the method further includes:
and sending Radio Resource Control (RRC) signaling to the user equipment, wherein the RRC signaling comprises the number of the switching points.
Wherein, said dividing the channel occupation time into at least one time period according to the number of the switching points comprises:
configuring a time slot format parameter for each time segment, wherein the time slot format parameter is used for indicating the time length of the time segment, the time slot or symbol used by the downlink transmission in the time segment, and the time slot or symbol used by the uplink transmission in the time segment.
Wherein, before sending the indication signaling to the user equipment, the method further comprises:
determining the time length of the channel occupation time and all time slots used for the uplink transmission or the downlink transmission in the channel occupation time; and
and when a certain time slot in the occupied time of the channel is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
Wherein, the sending the indication signaling to the user equipment by the base station comprises:
sending an indication signaling to the user equipment by using a part of bandwidth configured to the user equipment in a carrier frequency, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the part of bandwidth; or
Transmitting indication signaling to the user equipment by using a beam, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the beam; or
And sending an indication signaling to the user equipment by using the downlink control information.
Wherein, the sending the indication signaling to the user equipment by the base station comprises:
and sending the indication signaling to the user equipment at least once on the time slot or the symbol used for the downlink transmission in the channel occupation time.
Wherein, the sending the indication signaling to the user equipment by the base station comprises:
and when the physical downlink control channel is sent for the first time within the channel occupation time, sending the indication signaling to the user equipment.
In a second aspect, an embodiment of the present application provides a signaling indication apparatus, including:
the processing module is used for detecting the channel;
the processing module is further configured to determine a channel occupation time when the channel is detected to be in an idle state;
and a sending module, configured to send an indication signaling to the ue, where the indication signaling is used to indicate a timeslot or symbol used for downlink transmission and a timeslot or symbol used for uplink transmission within the channel occupation time.
The processing module is further configured to determine the number of switching points within the channel occupation time, where the number of switching points is the number of times that the downlink transmission is converted into the uplink transmission; and dividing the channel occupation time into at least one time period according to the number of the switching points, wherein each time period comprises a time slot or a symbol used by the downlink transmission and a time slot or a symbol used by the uplink transmission.
The processing module is further configured to obtain a service type of the transmission data; determining the number of switching points in the occupied time of the channel according to the service type
The processing module is further configured to determine a time length of the channel occupation time; and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time.
The processing module is further configured to determine a frequency range in which the channel is located; and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel.
The sending module is further configured to send a radio resource control RRC signaling to the user equipment, where the RRC signaling includes the number of the transition points.
The processing module is further configured to configure a timeslot format parameter for each time segment, where the timeslot format parameter is used to indicate a time length of the time segment, a timeslot or a symbol used for the downlink transmission in the time segment, and a timeslot or a symbol used for the uplink transmission in the time segment.
The processing module is further configured to determine a time length of the channel occupying time and all time slots used for the uplink transmission or the downlink transmission within the channel occupying time; and when a certain time slot in the channel occupation time is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
The base station sends an indication signaling to the user equipment by using a part of bandwidth configured to the user equipment in a carrier frequency, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the part of bandwidth; or
The base station sends an indication signaling to the user equipment by using a beam, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the beam; or
And the base station sends an indication signaling to the user equipment by using the downlink control information.
The sending module is further configured to send the indication signaling to the user equipment at least once on a timeslot or a symbol used for the downlink transmission within the channel occupation time.
The sending module is further configured to send the indication signaling to the user equipment when the physical downlink control channel is sent for the first time within the channel occupation time.
In a third aspect, the present application provides a base station, comprising: the signaling indication method comprises a processor, a memory and a communication bus, wherein the communication bus is used for realizing connection communication between the processor and the memory, and the processor executes a program stored in the memory for realizing the steps in the signaling indication method provided by the first aspect.
In one possible design, the terminal provided by the present application may include a module for performing the behavior correspondence of the network device in the above method design. The modules may be software and/or hardware.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the above aspects.
In a fifth aspect, the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
The embodiment of the application is implemented by detecting the channel; when the channel is detected to be in an idle state, determining the occupied time of the channel; and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used by downlink transmission and the time slot or symbol used by uplink transmission within the occupied time of the channel, so that the user equipment does not need to monitor the DCI information all the time, the power consumption of the user equipment is reduced, meanwhile, the user equipment does not need to send a scheduling request to the base station and can carry out uplink transmission after receiving the scheduling permission of the base station, and the time delay of the uplink transmission is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic architecture diagram of a signaling indication system according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a signaling indication method according to an embodiment of the present application;
fig. 3 is a schematic diagram of a channel occupation time provided by an embodiment of the present application;
FIG. 4 is a schematic illustration of a time period provided by an embodiment of the present application;
fig. 5 is a schematic structural diagram of a signaling indication apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of an architecture of a signaling indication system provided in an embodiment of the present application, where the signaling indication system includes a user equipment and a base station, and the user equipment may refer to a device providing voice and/or data connection to a user, may be connected to a computing device such as a laptop computer or a desktop computer, or may be a standalone device such as a Personal Digital Assistant (PDA). A user equipment may also be called a system, subscriber unit, subscriber station, mobile, remote station, access point, remote terminal, access terminal, user agent, or user device. A Base station may be an access point, a Node B, an evolved Node Base station (eNB), or a 5G Base station (gNB), and refers to a device in an access network that communicates with a wireless terminal over an air interface through one or more sectors. By converting received air-interface frames to IP packets, the base station may act as a router between the wireless terminal and the rest of the access network, which may include an internet protocol network. The base station may also coordinate the management of attributes for the air interface. Based on the channel access system, the following technical solutions are provided in the embodiments of the present application.
Referring to fig. 2, fig. 2 is a flowchart illustrating a signaling indication method according to an embodiment of the present application. As shown in the figures, the steps of the embodiment of the present application include:
s201, the base station detects the channel.
S202, when the base station detects that the channel is in an idle state, the base station determines the occupied time of the channel.
In a specific implementation, the channel occupation time may be an absolute time duration, for example, 2 ms. The length of a slot (slot) of the occupied time of the channel is related to the used reference subcarrier interval, when the reference subcarrier interval is 15KHz, 2ms comprises 2 slots, and each slot comprises 14 symbols; when the reference subcarrier spacing is 30KHz, then 2ms includes 4 slots, each slot containing 14 symbols. Since it is possible to detect that the channel is in an idle state at any time, the starting point of the channel occupation time may not be at the starting point of a slot, but at some point in the middle of the slot. As shown in fig. 3, fig. 3 is a schematic diagram of a channel occupation time according to an embodiment of the present application. The time length of the channel occupation time is 2ms, the reference subcarrier spacing is 30KHZ and includes 4 slots, wherein the starting point of the channel occupation time is in the middle of slot #0, the end point of the channel occupation time is in the middle of slot #4, and the channel occupation time includes a part of slot #0, slot #1, slot #2, slot #3 and a part of slot # 4. The method for indicating the time occupied by the channel may include:
in the first indication mode, first, the number of switching points in the channel occupation time is determined, where the number of switching points is the number of times of converting the downlink transmission to the uplink transmission. Optionally, after determining the number of transition points in the channel occupation time, the base station may send a radio resource control RRC signaling to the user equipment, where the RRC signaling includes the number of transition points. The determination of the number of the switching points in the channel occupation time comprises the following optional modes:
in a first alternative, the time length of the channel occupation time may be determined; and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time. Specifically, the maximum number of the conversion points may be taken as the number of the conversion points in the channel occupation time, where the maximum number of the conversion points is proportional to the time length of the channel occupation time, and the longer the time length of the channel occupation time is, the larger the maximum number of the conversion points is. For example, when the channel occupation time is 0-1 ms, the number of the maximum conversion points is 1; when the channel occupation time is 1-2 ms, the number of the maximum conversion points is 2; when the channel occupation time is 2-3 ms, the maximum number of the conversion points is 4.
In a second optional manner, the service type of the transmission data may be obtained; and determining the number of the switching points in the occupied time of the channel according to the service type. For example, for a high-reliability Low-Latency (Ultra-Reliable and Low Latency Communications, URLLC) service, one switching point is required for each slot; for enhanced Mobile BroadBand (eMBB) services, only one switching point is needed for multiple slots.
In a third alternative, the frequency range in which the channel is located may be determined; and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel. For example, the bandwidth of the channel is below 3GHz, and the number of switching points may be 1; the bandwidth of the channel is 3 GHz-6 GHz, and the number of the switching points can be 2; the bandwidth of the channel is above 6GHz, and the number of switching points can be 4.
In a fourth optional manner, the number of switching points in the channel occupation time may be determined according to the subcarrier spacing used in the bandwidth, for example, when the subcarrier spacing is 15KHz, the number of switching points is 1; when the subcarrier interval is 30KHz, the number of the conversion points is 2; when the subcarrier interval is 60KHz, the number of switching points is 4, etc.
Then, according to the number of the switching points, dividing the channel occupation time into at least one time period, wherein each time period comprises the time slot or symbol used by the downlink transmission and the time slot or symbol used by the uplink transmission.
For example, as shown in fig. 4, fig. 4 is a schematic diagram of a time period provided in an embodiment of the present application. The number of switching points is 2, so that the channel occupation time can be divided into 2 time periods, including: the first time period, which occupies a part of slot #0 and slot #1, starts from a start position of a Channel occupancy time, or starts from a start position of transmitting a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH) except a symbol for transmitting a Channel occupancy signal, and includes a symbol for Downlink transmission, a gap or an uncertain symbol, and a symbol for uplink transmission. The second time segment, occupying slot #2, slot #3 and a part of slot #4, starts after the end of the first segment, and includes symbols for downlink transmission, gap or uncertain symbols, and symbols for uplink transmission until the end of the channel occupation time.
Further, a slot format parameter may be configured for each of the time periods, where the slot format parameter is used to indicate a time length of the time period, a slot or a symbol used for the downlink transmission in the time period, and a slot or a symbol used for the uplink transmission in the time period.
For example, as shown in fig. 4, the slot format parameters in the first time period may include: x1+ X2+ gap or an indeterminate sign or slot (the number may not be given) + X4+ X5. Wherein, X1 may represent the number of symbols used for downlink transmission in a first slot within the channel occupation time, X2 may represent the number of slots used for all downlink transmissions, X3 may represent the number of symbols used for downlink transmission in a portion of slots after all slots used for downlink transmissions, X4 represents the number of symbols used for uplink transmission in a portion of slots before all slots used for uplink transmissions, and X5 represents the number of slots used for all uplink transmissions. As can be seen from fig. 4, X1 is the number of partial symbols in slot #0 occupied, X2 is 0, X3 is the number of symbols used for downlink transmission in slot #1, X4 is the number of symbols used for uplink transmission in slot #1, and X5 is 0.
It should be noted that the first time segment may not include X1, and X1 is calculated into X2, that is, all symbols of slot #0 occupied in the channel occupation time are all used for downlink transmission, so that slot #0 may be roughly calculated as all slots used for downlink transmission, and format parameters of other slots are not changed. In fact, when the channel occupation time is divided into three time segments, the middle time segment may occupy an integer number of slots, and thus X1 may be omitted or X1 is 0.
As another example, the slot format parameters of the second time period include: y1+ Y2+ gap or an indeterminate sign or slot (the number may not be given) + Y3+ Y4+ Y5. Y1 represents the number of slots that are all used for downlink transmission, Y2 represents the number of symbols that are partially used for downlink transmission in slots after all slots that are used for downlink transmission, Y3 represents the number of symbols that are partially used for uplink transmission in slots before all slots that are used for uplink transmission, Y4 represents the number of slots that are all used for uplink transmission, and Y5 represents the number of symbols that are partially used for uplink transmission in the last slot within the channel occupation time. As can be seen from fig. 4, Y1 is slot #2, i.e., Y1 takes the value 1; y2 is the number of partial symbols of slot #3 occupied; y3 is 0; y4 is 0; y5 is the number of fractional symbols of slot #4 occupied.
It should be noted that the second time period may not include Y5, and Y5 is calculated into Y4, that is, all symbols of slot #4 occupied in the channel occupation time are all used for uplink transmission, so that slot #4 may be roughly calculated as the slot that is all used for uplink transmission, and format parameters of other slots are not changed. In fact, when the channel occupation time is divided into three segments, the middle period may occupy an integer number of slots, and thus Y5 may be omitted or Y5 may be 0.
It should be understood that the above description gives the indication method of the slot format parameter for the first time segment and the second time segment, respectively, and also supplements the indication method of the slot format parameter for the middle time of the 3 time segments if the channel occupation time is included. However, if the same slot format parameters are used in each time slot, 6 parameters are required in each time slot, i.e. the first time slot needs to be added with an X6, the X6 is similar to the effect of Y5 (with a value of 0), the second time slot needs to be added with a Y0, the Y0 is similar to the effect of X1 and has a value of 0, and for the middle time slot, the first and sixth parameters are similar to the effects of X1 and Y5 and have a value of 0.
A second indication means, which may determine a time length of the channel occupying time and all time slots used for the uplink transmission or the downlink transmission within the channel occupying time; and when a certain time slot in the channel occupation time is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
Specifically, the second indication mode does not need to be segmented according to the transition point, and format indication information can be directly given for each slot. Each slot corresponds to 2 bits, and the format indication information is used for roughly indicating whether each slot is used for downlink transmission in its entirety or uplink transmission in its entirety, or contains 2 or more symbol types (e.g., symbols for uplink transmission, symbols for downlink transmission, and symbols for uncertainty or gap). For a slot containing 2 or more symbol types, dividing the number of symbols used for downlink transmission, the number of uncertain or gap symbols and the number of symbols used for uplink transmission in the slot into a plurality of transmission symbol combinations, configuring a mapping table, wherein the mapping table comprises the corresponding relation between the transmission symbol combinations and bitmap, and writing the mapping table into a base station and a user terminal, wherein the base station can only inform the user equipment of sending the bitmap, and the user equipment can know whether each symbol in the slot is a symbol used for uplink transmission, a symbol used for downlink transmission or an uncertain or gap symbol.
S203, the base station sends an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used by downlink transmission and the time slot or symbol used by uplink transmission in the channel occupation time.
In a specific implementation, a partial bandwidth (bandwidth part) configured to the ue in a carrier frequency may be used to send an indication signaling to the ue, where the indication signaling is used to indicate a parameter of the channel occupation time on the partial bandwidth. If part of the bandwidth of the user equipment changes, the channel occupancy time parameter may continue to be valid or unusable. And sending the format indication information of the uplink transmission and the downlink transmission of each part of bandwidth independently.
Alternatively, a beam may be used to transmit indication signaling to the user equipment, where the indication signaling is used to indicate a parameter of the channel occupancy time on the beam. If the transmission beam from the base station to the user equipment changes, the parameter of the channel occupation time can be continuously valid or can not be used. And sending the format indication information of the uplink transmission and the downlink transmission of each beam independently.
Alternatively, the downlink control information may be used to send an indication signaling to the ue. The downlink control information may include user equipment specific (UE specific) downlink control information and signaling group common (group common) downlink control information.
Optionally, the indication signaling may be sent to the ue at least once in a time slot or a symbol used for the downlink transmission within the channel occupation time. For example, a symbol for downlink transmission may be transmitted once at the start of each slot, or multiple downlink symbols may be transmitted multiple times in each slot. As another example, every two symbols for downlink transmission are sent.
Optionally, the indication signaling may be sent to the user equipment when the physical downlink control channel PDCCH is sent for the first time within the channel occupying time. The time for sending the PDCCH for the first time may be any downlink symbol, or may be limited, and includes: the PDCCH can be transmitted only in the 1 st, 3 rd, 5 th, 7 th 7 … … th symbols within a slot or in the starting symbol of each slot.
In the embodiment of the application, the channel is detected; when the channel is detected to be in an idle state, determining the occupied time of the channel; and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used by downlink transmission and the time slot or symbol used by uplink transmission within the occupied time of the channel, so that the user equipment does not need to monitor the DCI information all the time, the power consumption of the user equipment is reduced, meanwhile, the user equipment does not need to send a scheduling request to the base station and can carry out uplink transmission after receiving the scheduling permission of the base station, and the time delay of the uplink transmission is reduced.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a signaling indication apparatus according to an embodiment of the present application. The device in the embodiment of the application comprises:
a processing module 501, configured to detect a channel.
The processing module 501 is further configured to determine a channel occupation time when the channel is detected to be in an idle state.
In a specific implementation, the channel occupation time may be an absolute time duration, for example, 2 ms. The length of a slot (slot) of the occupied time of the channel is related to the used reference subcarrier interval, when the reference subcarrier interval is 15KHz, 2ms comprises 2 slots, and each slot comprises 14 symbols; when the reference subcarrier spacing is 30KHz, then 2ms includes 4 slots, each slot containing 14 symbols. Since it is possible to detect that the channel is in an idle state at any time, the starting point of the channel occupation time may not be at the starting point of a slot, but at some point in the middle of the slot. As shown in fig. 3, fig. 3 is a schematic diagram of a channel occupation time according to an embodiment of the present application. The time length of the channel occupation time is 2ms, the reference subcarrier spacing is 30KHZ and includes 4 slots, wherein the starting point of the channel occupation time is in the middle of slot #0, the end point of the channel occupation time is in the middle of slot #4, and the channel occupation time includes a part of slot #0, slot #1, slot #2, slot #3 and a part of slot # 4. The method for indicating the time occupied by the channel may include:
in the first indication mode, first, the number of switching points in the channel occupation time is determined, where the number of switching points is the number of times of converting the downlink transmission to the uplink transmission. Optionally, after determining the number of transition points in the channel occupation time, the base station may send a radio resource control RRC signaling to the user equipment, where the RRC signaling includes the number of transition points. The determination of the number of the switching points in the channel occupation time comprises the following optional modes:
in a first alternative, the time length of the channel occupation time may be determined; and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time. Specifically, the maximum number of the conversion points may be taken as the number of the conversion points in the channel occupation time, where the maximum number of the conversion points is proportional to the time length of the channel occupation time, and the longer the time length of the channel occupation time is, the larger the maximum number of the conversion points is. For example, when the channel occupation time is 0-1 ms, the number of the maximum conversion points is 1; when the channel occupation time is 1-2 ms, the number of the maximum conversion points is 2; when the channel occupation time is 2-3 ms, the maximum number of the conversion points is 4.
In a second optional manner, the service type of the transmission data may be obtained; and determining the number of the switching points in the occupied time of the channel according to the service type. For example, for a high-reliability Low-Latency (Ultra-Reliable and Low Latency Communications, URLLC) service, one switching point is required for each slot; for enhanced Mobile BroadBand (eMBB) services, only one switching point is needed for multiple slots.
In a third alternative, the frequency range in which the channel is located may be determined; and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel. For example, the bandwidth of the channel is below 3GHz, and the number of switching points may be 1; the bandwidth of the channel is 3 GHz-6 GHz, and the number of the switching points can be 2; the bandwidth of the channel is above 6GHz, and the number of switching points can be 4.
In a fourth optional manner, the number of switching points in the channel occupation time may be determined according to the subcarrier spacing used in the bandwidth, for example, when the subcarrier spacing is 15KHz, the number of switching points is 1; when the subcarrier interval is 30KHz, the number of the conversion points is 2; when the subcarrier interval is 60KHz, the number of switching points is 4, etc.
Then, according to the number of the switching points, dividing the channel occupation time into at least one time period, wherein each time period comprises the time slot or symbol used by the downlink transmission and the time slot or symbol used by the uplink transmission.
For example, as shown in fig. 4, fig. 4 is a schematic diagram of a time period provided in an embodiment of the present application. The number of switching points is 2, so that the channel occupation time can be divided into 2 time periods, including: the first time period, which occupies a part of slot #0 and slot #1, starts from a start position of a Channel occupancy time, or starts from a start position of transmitting a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH) except a symbol for transmitting a Channel occupancy signal, and includes a symbol for Downlink transmission, a gap or an uncertain symbol, and a symbol for uplink transmission. The second time segment, occupying slot #2, slot #3 and a part of slot #4, starts after the end of the first segment, and includes symbols for downlink transmission, gap or uncertain symbols, and symbols for uplink transmission until the end of the channel occupation time.
Further, a slot format parameter may be configured for each of the time periods, where the slot format parameter is used to indicate a time length of the time period, a slot or a symbol used for the downlink transmission in the time period, and a slot or a symbol used for the uplink transmission in the time period.
For example, as shown in fig. 4, the slot format parameters in the first time period may include: x1+ X2+ gap or an indeterminate sign or slot (the number may not be given) + X4+ X5. Wherein, X1 may represent the number of symbols used for downlink transmission in a first slot within the channel occupation time, X2 may represent the number of slots used for all downlink transmissions, X3 may represent the number of symbols used for downlink transmission in a portion of slots after all slots used for downlink transmissions, X4 represents the number of symbols used for uplink transmission in a portion of slots before all slots used for uplink transmissions, and X5 represents the number of slots used for all uplink transmissions. As can be seen from fig. 4, X1 is the number of partial symbols in slot #0 occupied, X2 is 0, X3 is the number of symbols used for downlink transmission in slot #1, X4 is the number of symbols used for uplink transmission in slot #1, and X5 is 0.
It should be noted that the first time segment may not include X1, and X1 is calculated into X2, that is, all symbols of slot #0 occupied in the channel occupation time are all used for downlink transmission, so that slot #0 may be roughly calculated as all slots used for downlink transmission, and format parameters of other slots are not changed. In fact, when the channel occupation time is divided into three time segments, the middle time segment may occupy an integer number of slots, and thus X1 may be omitted or X1 is 0.
As another example, the slot format parameters of the second time period include: y1+ Y2+ gap or an indeterminate sign or slot (the number may not be given) + Y3+ Y4+ Y5. Y1 represents the number of slots that are all used for downlink transmission, Y2 represents the number of symbols that are partially used for downlink transmission in slots after all slots that are used for downlink transmission, Y3 represents the number of symbols that are partially used for uplink transmission in slots before all slots that are used for uplink transmission, Y4 represents the number of slots that are all used for uplink transmission, and Y5 represents the number of symbols that are partially used for uplink transmission in the last slot within the channel occupation time. As can be seen from fig. 4, Y1 is slot #2, i.e., Y1 takes the value 1; y2 is the number of partial symbols of slot #3 occupied; y3 is 0; y4 is 0; y5 is the number of fractional symbols of slot #4 occupied.
It should be noted that the second time period may not include Y5, and Y5 is calculated into Y4, that is, all symbols of slot #4 occupied in the channel occupation time are all used for uplink transmission, so that slot #4 may be roughly calculated as the slot that is all used for uplink transmission, and format parameters of other slots are not changed. In fact, when the channel occupation time is divided into three segments, the middle period may occupy an integer number of slots, and thus Y5 may be omitted or Y5 may be 0.
It should be understood that the above description gives the indication method of the slot format parameter for the first time segment and the second time segment, respectively, and also supplements the indication method of the slot format parameter for the middle time of the 3 time segments if the channel occupation time is included. However, if the same slot format parameters are used in each time slot, 6 parameters are required in each time slot, i.e. the first time slot needs to be added with an X6, the X6 is similar to the effect of Y5 (with a value of 0), the second time slot needs to be added with a Y0, the Y0 is similar to the effect of X1 and has a value of 0, and for the middle time slot, the first and sixth parameters are similar to the effects of X1 and Y5 and have a value of 0.
A second indication means, which may determine a time length of the channel occupying time and all time slots used for the uplink transmission or the downlink transmission within the channel occupying time; and when a certain time slot in the channel occupation time is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
Specifically, the second indication mode does not need to be segmented according to the transition point, and format indication information can be directly given for each slot. Each slot corresponds to 2 bits, and the format indication information is used for roughly indicating whether each slot is used for downlink transmission in its entirety or uplink transmission in its entirety, or contains 2 or more symbol types (e.g., symbols for uplink transmission, symbols for downlink transmission, and symbols for uncertainty or gap). For a slot containing 2 or more symbol types, dividing the number of symbols used for downlink transmission, the number of uncertain or gap symbols and the number of symbols used for uplink transmission in the slot into a plurality of transmission symbol combinations, configuring a mapping table, wherein the mapping table comprises the corresponding relation between the transmission symbol combinations and bitmap, and writing the mapping table into a base station and a user terminal, wherein the base station can only inform the user equipment of sending the bitmap, and the user equipment can know whether each symbol in the slot is a symbol used for uplink transmission, a symbol used for downlink transmission or an uncertain or gap symbol.
A sending module 502, configured to send an indication signaling to the ue, where the indication signaling is used to indicate a timeslot or a symbol used for downlink transmission and a timeslot or a symbol used for uplink transmission within the channel occupation time.
In a specific implementation, a partial bandwidth (bandwidth part) configured to the ue in a carrier frequency may be used to send an indication signaling to the ue, where the indication signaling is used to indicate a parameter of the channel occupation time on the partial bandwidth. If part of the bandwidth of the user equipment changes, the channel occupancy time parameter may continue to be valid or unusable. And sending the format indication information of the uplink transmission and the downlink transmission of each part of bandwidth independently.
Alternatively, a beam may be used to transmit indication signaling to the user equipment, where the indication signaling is used to indicate a parameter of the channel occupancy time on the beam. If the transmission beam from the base station to the user equipment changes, the parameter of the channel occupation time can be continuously valid or can not be used. And sending the format indication information of the uplink transmission and the downlink transmission of each beam independently.
Alternatively, the downlink control information may be used to send an indication signaling to the ue. The downlink control information may include user equipment specific (UE specific) downlink control information and signaling group common (group common) downlink control information.
Optionally, the indication signaling may be sent to the ue at least once in a time slot or a symbol used for the downlink transmission within the channel occupation time. For example, a symbol for downlink transmission may be transmitted once at the start of each slot, or multiple downlink symbols may be transmitted multiple times in each slot. As another example, every two symbols for downlink transmission are sent.
Optionally, the indication signaling may be sent to the user equipment when the physical downlink control channel PDCCH is sent for the first time within the channel occupying time. The time for sending the PDCCH for the first time may be any downlink symbol, or may be limited, and includes: the PDCCH can be transmitted only in the 1 st, 3 rd, 5 th, 7 th 7 … … th symbols within a slot or in the starting symbol of each slot.
In the embodiment of the application, the channel is detected; when the channel is detected to be in an idle state, determining the occupied time of the channel; and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used by downlink transmission and the time slot or symbol used by uplink transmission within the occupied time of the channel, so that the user equipment does not need to monitor the DCI information all the time, the power consumption of the user equipment is reduced, meanwhile, the user equipment does not need to send a scheduling request to the base station and can carry out uplink transmission after receiving the scheduling permission of the base station, and the time delay of the uplink transmission is reduced.
Please refer to fig. 6, fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure. As shown, the base station may include: at least one processor 601, at least one communication interface 602, at least one memory 603, and at least one communication bus 604.
The processor 601 may be, among other things, a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The communication bus 604 may be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus. A communication bus 604 is used to enable connective communication between these components. The communication interface 602 of the device in the embodiment of the present application is used for performing signaling or data communication with other node devices. The Memory 603 may include a volatile Memory, such as a Nonvolatile dynamic Random Access Memory (NVRAM), a Phase Change Random Access Memory (PRAM), a Magnetoresistive Random Access Memory (MRAM), and the like, and may further include a Nonvolatile Memory, such as at least one magnetic Disk Memory device, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a flash Memory device, such as a NOR flash Memory (NOR flash Memory) or a NAND flash Memory (EEPROM), a semiconductor device, such as a Solid State Disk (SSD), and the like. The memory 603 may optionally be at least one storage device located remotely from the processor 601. A set of program codes is stored in the memory 603 and the processor 601 executes the programs executed by the base stations in the memory 603.
Detecting a channel;
when the channel is detected to be in an idle state, determining the occupied time of the channel;
and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used for downlink transmission and the time slot or symbol used for uplink transmission in the channel occupation time.
Optionally, the processor 601 is further configured to perform the following operations:
determining the number of switching points in the channel occupation time, wherein the number of the switching points is the number of times of converting the downlink transmission into the uplink transmission;
and dividing the channel occupation time into at least one time period according to the number of the switching points, wherein each time period comprises a time slot or a symbol used by the downlink transmission and a time slot or a symbol used by the uplink transmission.
Optionally, the processor 601 is further configured to perform the following operations:
acquiring the service type of transmission data;
and determining the number of the switching points in the occupied time of the channel according to the service type.
Optionally, the processor 601 is further configured to perform the following operations:
determining a time length of the channel occupancy time;
and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time.
Optionally, the processor 601 is further configured to perform the following operations:
determining the frequency range of the channel;
and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel.
Optionally, the processor 601 is further configured to perform the following operations:
and sending Radio Resource Control (RRC) signaling to the user equipment, wherein the RRC signaling comprises the number of the switching points.
Optionally, the processor 601 is further configured to perform the following operations:
configuring a time slot format parameter for each time segment, wherein the time slot format parameter is used for indicating the time length of the time segment, the time slot or symbol used by the downlink transmission in the time segment, and the time slot or symbol used by the uplink transmission in the time segment.
Optionally, the processor 601 is further configured to perform the following operations:
determining the time length of the channel occupation time and all time slots used for the uplink transmission or the downlink transmission in the channel occupation time; and
and when a certain time slot in the occupied time of the channel is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
Optionally, the processor 601 is further configured to perform the following operations:
sending an indication signaling to the user equipment by using a part of bandwidth configured to the user equipment in a carrier frequency, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the part of bandwidth; or
Transmitting indication signaling to the user equipment by using a beam, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the beam; or
And sending an indication signaling to the user equipment by using the downlink control information.
Optionally, the processor 601 is further configured to perform the following operations:
and sending the indication signaling to the user equipment at least once on the time slot or the symbol used for the downlink transmission in the channel occupation time.
Optionally, the processor 601 is further configured to perform the following operations:
and when the physical downlink control channel is sent for the first time within the channel occupation time, sending the indication signaling to the user equipment.
Further, the processor may cooperate with the memory and the communication interface to perform the operations of the base station in the embodiments of the above application.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present application in detail. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (21)

1. A method of signaling indication, the method comprising:
detecting a channel;
when the channel is detected to be in an idle state, determining the occupied time of the channel;
determining the number of switching points in the occupied time of the channel, wherein the number of the switching points is the number of times of converting downlink transmission into uplink transmission;
dividing the channel occupation time into at least one time period according to the number of the conversion points, wherein each time period comprises a time slot or a symbol used by the downlink transmission and a time slot or a symbol used by the uplink transmission;
and sending an indication signaling to the user equipment, wherein the indication signaling is used for indicating the time slot or symbol used by the downlink transmission and the time slot or symbol used by the uplink transmission in the channel occupation time.
2. The method of claim 1, wherein said determining the number of transition points within said channel occupancy time comprises:
acquiring the service type of transmission data;
and determining the number of the switching points in the occupied time of the channel according to the service type.
3. The method of claim 1, wherein said determining the number of transition points within said channel occupancy time comprises:
determining a time length of the channel occupancy time;
and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time.
4. The method of claim 1, wherein said determining the number of transition points within said channel occupancy time comprises:
determining the frequency range of the channel;
and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel.
5. The method of claim 1, wherein after determining the number of transition points in the channel occupancy time, further comprising:
and sending Radio Resource Control (RRC) signaling to the user equipment, wherein the RRC signaling comprises the number of the switching points.
6. The method of claim 1, wherein said dividing said channel occupancy time into at least one time period based on said number of switching points comprises:
configuring a time slot format parameter for each time segment, wherein the time slot format parameter is used for indicating the time length of the time segment, the time slot or symbol used by the downlink transmission in the time segment, and the time slot or symbol used by the uplink transmission in the time segment.
7. The method of claim 1, wherein prior to sending the indication signaling to the user equipment, further comprising:
determining the time length of the channel occupation time and all time slots used for the uplink transmission or the downlink transmission in the channel occupation time; and
and when a certain time slot in the occupied time of the channel is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
8. The method of any one of claims 1-7, wherein the sending the indication signaling to the user equipment comprises:
sending an indication signaling to the user equipment by using a part of bandwidth configured to the user equipment in a carrier frequency, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the part of bandwidth; or
Transmitting indication signaling to the user equipment by using a beam, wherein the indication signaling is used for indicating a parameter of the channel occupation time on the beam; or
And sending an indication signaling to the user equipment by using the downlink control information.
9. The method of any one of claims 1-7, wherein the sending the indication signaling to the user equipment comprises:
and sending the indication signaling to the user equipment at least once on the time slot or the symbol used for the downlink transmission in the channel occupation time.
10. The method of any one of claims 1-7, wherein the sending the indication signaling to the user equipment comprises:
and when the physical downlink control channel is sent for the first time within the channel occupation time, sending the indication signaling to the user equipment.
11. An apparatus for signaling, the apparatus comprising:
the processing module is used for detecting the channel;
the processing module is further configured to determine a channel occupation time when the channel is detected to be in an idle state;
the processing module is further configured to determine the number of switching points within the channel occupation time, where the number of switching points is the number of times for converting downlink transmission into uplink transmission; dividing the channel occupation time into at least one time period according to the number of the conversion points, wherein each time period comprises a time slot or a symbol used by the downlink transmission and a time slot or a symbol used by the uplink transmission;
a sending module, configured to send an indication signaling to a user equipment, where the indication signaling is used to indicate a timeslot or a symbol used for the downlink transmission and a timeslot or a symbol used for the uplink transmission within the channel occupation time.
12. The apparatus of claim 11,
the processing module is further configured to obtain a service type of the transmission data; and determining the number of the switching points in the occupied time of the channel according to the service type.
13. The apparatus of claim 11,
the processing module is further configured to determine a time length of the channel occupation time; and determining the number of conversion points in the channel occupation time according to the time length of the channel occupation time.
14. The apparatus of claim 11,
the processing module is further configured to determine a frequency range in which the channel is located; and determining the number of switching points in the occupied time of the channel according to the frequency range of the channel.
15. The apparatus of claim 11,
the sending module is further configured to send a radio resource control RRC signaling to the user equipment, where the RRC signaling includes the number of the transition points.
16. The apparatus of claim 11,
the processing module is further configured to configure a slot format parameter for each time segment, where the slot format parameter is used to indicate a time length of the time segment, a slot or a symbol used for the downlink transmission in the time segment, and a slot or a symbol used for the uplink transmission in the time segment.
17. The apparatus of claim 11,
the processing module is further configured to determine a time length of the channel occupying time and all time slots used for the uplink transmission or the downlink transmission within the channel occupying time; and when a certain time slot in the channel occupation time is a transmission symbol combination, determining a bitmap corresponding to the transmission symbol combination.
18. The apparatus of any one of claims 11-17,
the sending module is further configured to send an indication signaling to the user equipment by using a part of bandwidth configured to the user equipment in a carrier frequency, where the indication signaling is used to indicate a parameter of the channel occupation time on the part of bandwidth; or
The sending module is further configured to send an indication signaling to the user equipment by using a beam, where the indication signaling is used to indicate a parameter of the channel occupation time on the beam; or
The sending module is further configured to send an indication signaling to the user equipment by using the downlink control information.
19. The apparatus of any one of claims 11-17,
the sending module is further configured to send the indication signaling to the user equipment at least once on the time slot or the symbol used for the downlink transmission within the channel occupation time.
20. The apparatus of any one of claims 11-17,
the sending module is further configured to send the indication signaling to the user equipment when the physical downlink control channel is sent for the first time within the channel occupation time.
21. A computer-readable storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the method according to any one of claims 1-10.
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