CN108513362B - Channel detection method, device and base station - Google Patents

Channel detection method, device and base station Download PDF

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CN108513362B
CN108513362B CN201810308691.XA CN201810308691A CN108513362B CN 108513362 B CN108513362 B CN 108513362B CN 201810308691 A CN201810308691 A CN 201810308691A CN 108513362 B CN108513362 B CN 108513362B
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signal block
pdcch
idle
synchronization signal
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CN108513362A (en
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戴明晔
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
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • 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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

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Abstract

The embodiment of the invention discloses a channel detection method, a device and a base station, which comprise the following steps: detecting whether a channel of a synchronous signal block is idle or not according to the determined first channel detection mechanism; if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment; and sending the information of the physical downlink control channel PDCCH and/or the information of the physical downlink shared channel PDSCH of the rest system information to the user equipment. By adopting the embodiment of the invention, the effectiveness of channel detection can be improved, and the information sending efficiency can be improved.

Description

Channel detection method, device and base station
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a channel detection method, an apparatus, and a base station.
Background
With the development of communication technology, the development of the fifth Generation communication technology (5 th-Generation, 5G) is faster and faster, and a New Radio technology (NR) is developed in the 5G communication, and in the New NR, there is no corresponding channel detection mechanism for a Synchronization Signal Block (SSB) and corresponding Remaining System Information (RMSI) PDCCH and PDSCH on an unlicensed spectrum.
Disclosure of Invention
Embodiments of the present invention provide a channel detection method, an apparatus, and a base station, which can improve the efficiency of channel detection and improve the efficiency of data transmission.
In a first aspect, an embodiment of the present invention provides a channel detection method, where the method includes:
detecting whether a channel of a synchronous signal block is idle or not according to the determined first channel detection mechanism;
if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment;
and sending the information of the physical downlink control channel PDCCH and/or the information of the physical downlink shared channel PDSCH of the residual system information RMSI to the user equipment.
Further, determining a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the remaining system information, and a bandwidth interval between the channel of the synchronization signal block and the PDCCH of the remaining system information;
detecting whether a channel of the synchronization signal block is idle according to the determined first channel detection mechanism over the total bandwidth.
Further, after the time domain end position of the channel of the synchronization signal block and before the time domain start position of the PDCCH of the remaining system information, a channel occupying signal is sent on the frequency domain resource of the synchronization signal block until the information of the PDCCH of the remaining system information is sent on the time-frequency resource of the PDCCH of the remaining system information;
wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
Further, detecting whether the PDCCH is idle according to a determined second channel detection mechanism;
and if the UE is idle, triggering to send the PDCCH information and/or PDSCH information of the rest system information to the UE.
Further, the first channel detection mechanism and the second channel detection mechanism are different, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and a first detection parameter of a channel of the synchronization signal block is different from a second detection parameter of the PDCCH.
Further, acquiring a first priority of the synchronization signal block;
configuring a first detection parameter of a channel of the synchronization signal block according to the first priority;
detecting whether a channel of the synchronous signal block is idle or not according to the first detection parameter;
after the sending the synchronization signal block to the user equipment, the method includes:
acquiring a second detection parameter of the PDCCH of the remaining system information, wherein the second detection parameter is smaller than the first detection parameter;
and detecting whether the PDCCH of the residual system information is idle or not according to the second detection parameter.
Further, acquiring a second priority of the information of the PDCCH, wherein the second priority is higher than the first priority;
and configuring a second detection parameter of the PDCCH of the remaining system information according to the second priority.
Further, acquiring a first idle time of a channel of the synchronization signal block;
detecting whether a channel of the synchronous signal block is idle or not according to the first idle time length;
after the sending the synchronization signal block to the user equipment, the method includes:
acquiring a second idle time of the PDCCH of the remaining system information, wherein the second idle time is less than the first idle time;
and detecting whether the PDCCH of the residual system information is idle or not according to the second idle time length.
In a second aspect, an embodiment of the present invention provides a channel detection apparatus, including:
the first detection module is used for detecting whether a channel of the synchronous signal block is idle or not according to the determined first channel detection mechanism;
a first sending module, configured to send the synchronization signal block to a user equipment if a channel of the synchronization signal block is idle;
a second sending module, configured to send, to the ue, information of a physical downlink control channel PDCCH and/or information of a physical downlink shared channel PDSCH of the remaining system information.
Further, the first detecting module is configured to determine a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the remaining system information, and a bandwidth interval between the channel of the synchronization signal block and the PDCCH of the remaining system information; detecting whether a channel of the synchronization signal block is idle according to the determined first channel detection mechanism over the total bandwidth.
Further, the first sending module is configured to send, after sending the synchronization signal block to a user equipment, a channel occupancy signal on a frequency domain resource of the synchronization signal block after a time domain end position of a channel of the synchronization signal block and before a time domain start position of the PDCCH of the remaining system information until information of the PDCCH of the remaining system information is sent on a time-frequency resource of the PDCCH of the remaining system information; wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
Further, the apparatus further comprises:
a second detection module, configured to detect whether the PDCCH is idle according to a determined second channel detection mechanism; and if the UE is idle, triggering to send the PDCCH information and/or PDSCH information of the rest system information to the UE.
Further, the first channel detection mechanism and the second channel detection mechanism are different, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and a first detection parameter of a channel of the synchronization signal block is different from a second detection parameter of the PDCCH.
Further, the first detecting module is configured to obtain a first priority of the synchronization signal block; configuring a first detection parameter of a channel of the synchronization signal block according to the first priority; detecting whether a channel of the synchronous signal block is idle or not according to the first detection parameter;
the first sending module is configured to obtain a second detection parameter of the PDCCH of the remaining system information after sending the synchronization signal block to the user equipment, where the second detection parameter is smaller than the first detection parameter; and detecting whether the PDCCH of the residual system information is idle or not according to the second detection parameter.
Further, the first detection module is configured to obtain a second priority of the information of the PDCCH, where the second priority is higher than the first priority; and configuring a second detection parameter of the PDCCH of the remaining system information according to the second priority.
Further, the first detecting module is configured to obtain a first idle duration of a channel of the synchronization signal block; detecting whether a channel of the synchronous signal block is idle or not according to the first idle time length;
the first sending module is configured to obtain a second idle duration of the PDCCH of the remaining system information after sending the synchronization signal block to the user equipment, where the second idle duration is smaller than the first idle duration; and detecting whether the PDCCH of the residual system information is idle or not according to the second idle time length.
In a third aspect, an embodiment of the present invention provides a base station, including a memory and a processor;
the memory to store program instructions;
the processor executes the program instructions stored in the memory, and when the program instructions are executed, the processor is configured to perform the steps in the channel detection method provided by the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the channel detection method according to the first aspect.
In the embodiment of the present invention, if the base station detects that the channel of the synchronization signal block is idle according to the determined first channel detection mechanism, the base station may send the synchronization signal block to the user equipment, and then send the information of the PDCCH and/or the information of the PDSCH of the RMSI to the user equipment. By adopting the mode, the efficiency of channel detection is improved, and the information sending efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram of a time-frequency resource location provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a channel detection system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a channel detection method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a channel detection apparatus provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment of the invention provides a channel detection method, a device and a base station, and the method can be used for detecting a channel of a synchronization signal block in NR and a PDCCH of RMSI. The Synchronization Signal block includes PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal), and PBCH (Physical Broadcast Channel) information, and is a reference Signal having the same function as a reference Signal in Long Term Evolution (LTE) in NR. The embodiment of the invention provides a channel detection mechanism on the unlicensed spectrum aiming at the SSB and the RMSI of the specific time-frequency resource position, and improves the efficiency of the base station for sending the SSB and the information of the PDCCH and/or the PDSCH of the RMSI, thereby improving the channel access efficiency on the unlicensed spectrum.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with each other without conflict.
The embodiment of the invention provides a channel detection method, a device and a base station aiming at the time-frequency resource positions of an SSB and a corresponding RMSI. The time-frequency resource position of the RMSI is shown in fig. 1, where fig. 1 is a schematic diagram of the time-frequency resource position provided in an embodiment of the present application, where a time-domain resource position of a synchronization signal block is completely different from a time-domain resource position of Physical Downlink Control Channel (PDCCH) information of remaining system information and a time-domain resource position of Physical Downlink Shared Channel (PDSCH) information, and the frequency-domain resource position of the synchronization signal block, the frequency-domain resource position of the PDCCH information of the remaining system information and the frequency-domain resource position of the PDSCH information have an overlapping portion.
The channel detection method provided by the embodiment of the invention can be executed by a channel detection system, and the system comprises the following steps: the base station can detect whether a channel of a synchronous signal block is idle according to the determined first channel detection mechanism, and if the channel of the synchronous signal block is idle, the base station can send the synchronous signal block to the user equipment. The base station may transmit information of a PDCCH and/or information of a PDSCH of the RMSI to the user equipment after transmitting the synchronization signal block to the user equipment. It should be noted that, if the base station does not send the SSB to the user equipment, it does not make sense to send the information of the PDCCH of the corresponding RMSI. Therefore, if the channel detection of the SSB by the base station is unsuccessful, there is no practical meaning even if the PDCCH detection of the RMSI by the base station is successful.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a channel detection system according to an embodiment of the present invention. As shown in fig. 2, the system includes: a base station 21 and a user equipment 22. The user device 22 may refer to a device that provides voice, data connectivity to a user, may be connected to a computing device such as a tablet or desktop computer, or it may be a standalone device such as a Personal Digital Assistant (PDA). The Base station 21 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 through one or more sectors on an air interface. By converting received air-interface frames to IP packets, the base station 21 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 21 may also coordinate the management of attributes of the air interface.
In this embodiment of the present invention, the base station 21 may detect whether the channel of the synchronization signal block is idle according to the determined first channel detection mechanism; the base station 21 may transmit the synchronization signal block to the user equipment 22 if the base station detects that the channel of the synchronization signal block is idle. The base station 21 may transmit information of PDCCH and/or information of PDSCH of the remaining system information RMSI to the user equipment 22 after transmitting the synchronization signal block. In an embodiment, the embodiment of the present invention may detect whether a channel of the synchronization signal block is idle first, and then detect whether a PDCCH and/or a PDSCH of the RMSI is idle. In other embodiments, the present invention may also use other detection orders to detect the channel of the synchronization signal block and the PDCCH and/or PDSCH of the RMSI, and the present invention does not specifically limit the detection order of the channel of the synchronization signal block and the PDCCH and/or PDSCH of the RMSI.
In an embodiment, before detecting the channel of the synchronization signal block and the PDCCH and/or PDSCH of the RMSI, the base station 21 may determine a channel detection mechanism according to a time-frequency resource location of the PDCCH of the RMSI corresponding to the synchronization signal block. The PDCCH of the RMSI is used for transmitting scheduling information, and the scheduling information is used for informing user equipment of relevant information such as receiving and decoding of the PDSCH of the RMSI; and the PDSCH of the RMSI is used to transmit the remaining system information to the user equipment.
It should be noted that the time domain starting position of the PDCCH of the RMSI corresponding to the synchronization signal block SSB is determined by a configuration parameter O. For example, a SSB with number i has a monitoring window monitoring two consecutive slots of PDCCH of RMSI, and the starting slot is
Figure BDA0001619621300000061
The base station 21 selects a suitable position in the monitoring window to transmit the information of the PDCCH and/or the information of the PDSCH of the RMSI. Where the parameters O and M are given by the corresponding tables, μ e {0,1,2,3}, and the sub-carrier spacing, SCS, sub-carrier spacing of the RMSI-based PDCCH,
Figure BDA0001619621300000071
the SCS is determined by μ for the number of slots in a frame of a system frame given the SCS.
Therefore, the base station 21 may determine the channel of the SSB and the channel detection mechanism of the PDCCH of the RMSI according to the configuration parameter O. The value of the parameter O may be determined according to a Frequency Range (FR). Wherein, for FR1 (frequency range 1, i.e., below 6 GHz), the value of the parameter O is {0,2,5,7}, and for FR2 (frequency range 2, i.e., above 6 GHz), the value of the parameter O is {0,2.5,5,7.5}. And the parameter O determines the time domain start slot of the monitoring window of the PDCCH of the RMSI. For example, when the value of O is 0,2 (FR 1) or 0,2.5 (FR 2), the time domain interval between the SSB and the PDCCH of the corresponding RMSI is small, and the base station may use any one of a plurality of channel detection mechanisms. In this case, the channel detection is performed on the channel of the SSB and the PDCCH of the corresponding RMSI using a channel detection mechanism in a joint detection manner, which can ensure that the base station can successfully transmit the information of the PDCCH and/or the PDSCH in the corresponding RMSI after transmitting the SSB to the greatest extent, and avoid wasting too much time-frequency resources by transmitting a channel occupying signal between the time-domain position of the SSB and the time-domain position of the PDDCH information.
For another example, when the value of O is 5,7 (FR 1) or 5,7.5 (FR 2), the information of the SSB and the PDCCH of the corresponding RMSI has a large time-domain interval, and if a channel detection mechanism of joint detection is used to perform channel detection on the SSB and the PDCCH of the corresponding RMSI, more time-frequency resources are wasted, a channel detection method of independently detecting the channel of the SSB and the PDCCH of the corresponding RMSI may be used, and different channel detection mechanisms may be used. Alternatively, a channel detection scheme for independently detecting the channel of the SSB and the PDCCH of the corresponding RMSI may be used, or a channel detection mechanism in which the same channel detection method is used and the channel detection parameters of the two are associated with each other may be used.
It should be noted that, in the embodiment of the present invention, determining a channel detection mechanism according to the time-frequency resource location of the PDCCH of the RMSI corresponding to the synchronization signal block is one of the determination manners, and in the embodiment of the present invention, any channel detection mechanism may also be determined to perform channel detection. Due to the characteristics of large bandwidth and various SCS configurations of NR, the parameters (priority, contention window, random number N, defer period, etc.) used in detecting the channel may need to be changed according to the used SCS.
It should be further noted that, in the multiple channel detection mechanisms mentioned in the embodiments of the present invention, the information of the PDCCH of the RMSI is always after the corresponding SSB in the time domain, and during channel detection, whether the SSB channel is idle is always detected first, and then whether the PDCCH of the RMSI is idle is detected. This is because if the base station detects that the SSB is not successfully transmitted, it makes no sense that the base station transmits information of a corresponding PDCCH and/or information of a PDSCH. In fact, in some cases, the information of PDCCH of RMSI may be before corresponding SSB in time domain, and for this case, the embodiment of the present invention may also use any one of the multiple channel detection mechanisms provided by the embodiment of the present invention. For the embodiment of the invention, the base station can firstly perform channel detection similar to the PDSCH in the LTE on the PDCCH of the RMSI, and continuously send the channel occupation signal after the information of the PDCCH and/or the information of the PDSCH is sent until the corresponding SSB is sent.
Referring to fig. 3, fig. 3 is a flowchart illustrating a channel detection method according to an embodiment of the present invention. The method may be performed by a base station, the interpretation of which is as described above. Specifically, the method of the embodiment of the present invention includes the following steps.
S301: and detecting whether the channel of the synchronous signal block is idle or not according to the determined first channel detection mechanism.
In the embodiment of the present invention, the base station may detect whether the channel of the synchronization signal block is idle according to the determined first channel detection mechanism. Specifically, the base station may first obtain a time-frequency resource location of the synchronization signal block, determine a first channel detection mechanism of the synchronization signal block according to the obtained time-frequency resource location, and detect whether a channel of the synchronization signal block is idle according to the determined first channel detection mechanism.
In an embodiment, the base station may perform channel detection on the channel of the SSB and the PDCCH of the RMSI in a joint detection manner, and a channel detection mechanism of the synchronization signal block is the same as a channel detection mechanism of the PDCCH of the remaining system information. For example, the channel of the synchronization signal block and the PDCCH of the remaining system information are detected using a channel detection mechanism of DRS in LAA, or the channel of the synchronization signal block and the PDCCH of the remaining system information are detected using a channel detection mechanism of PDSCH in LAA.
In an embodiment, when performing channel detection by using a joint detection method, a base station may first obtain a frequency domain bandwidth of the synchronization signal block, a frequency domain bandwidth of the PDCCH of the remaining system information, and a bandwidth interval between the channel of the synchronization signal block and the PDCCH of the remaining system information, and may determine a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the remaining system information, and the bandwidth interval between the channel of the synchronization signal block and the PDCCH of the remaining system information. The base station may detect whether a channel of the synchronization signal block is idle according to the determined first channel detection mechanism over the total bandwidth. The method comprises the following steps: detecting a channel of the synchronization signal block and detecting a PDCCH of the remaining system information over the total bandwidth.
For example, when both use the channel detection mechanism of DRS in LAA, for a synchronization signal block, it is only necessary to detect that there is an idle duration of X us duration in the channel, and then send the synchronization signal block, and continue to send the channel occupying signal until the information of PDCCH of the remaining system information is sent. For the PDCCHs of the remaining system information, the PDCCH information of the remaining system information may be transmitted without detecting the PDCCH.
In an embodiment, the base station may perform channel detection on the SSB channel and the PDCCH of the RMSI in an independent detection manner, where a channel detection mechanism of the synchronization signal block is independent from a channel detection mechanism of the PDCCH of the remaining system information. The method comprises the following steps: detecting a channel of the synchronization signal block over a frequency domain bandwidth of the synchronization signal block, and detecting a PDCCH of the remaining system information over a frequency domain bandwidth of the PDCCH of the remaining system information.
In one embodiment, the base station may detect the channel of the synchronization signal block and the PDCCH of the remaining system information using the same channel detection mechanism. For example, the channel of the synchronization signal block and the PDCCH of the remaining system information are detected using a channel detection mechanism of a DRS in the LAA, or the channel of the synchronization signal block and the PDCCH of the remaining system information are detected using a channel detection mechanism of a PDSCH in the LAA.
In one embodiment, the base station may detect the channel of the synchronization signal block and the PDCCH of the remaining system information using different channel detection mechanisms. For example, a channel detection mechanism of PDSCH in LAA is used to detect a channel of a synchronization signal block, and a channel detection mechanism of DRS in the LAA is used to detect PDCCH of remaining system information. Of course, in other embodiments, the base station may also use other channel detection mechanisms to detect the channels of the synchronization signal blocks and the PDCCHs of the remaining system information.
S302: and if the channel of the synchronous signal block is idle, transmitting the synchronous signal block to user equipment.
In the embodiment of the present invention, if it is detected that the channel of the synchronization signal block is idle, the base station may send the synchronization signal block to the user equipment. In one embodiment, when it is detected that a channel of a synchronization signal block is idle in a joint manner, the base station may transmit the synchronization signal block to the user equipment on a time domain resource of the total bandwidth. In one embodiment, when it is detected that a channel of a synchronization signal block is idle in an independent manner, a base station may transmit the synchronization signal block to the user equipment on a time domain resource of the channel of the synchronization signal block.
In an embodiment, when detecting that the PDCCH of the RMSI and the channel of the synchronization signal block are jointly detected, after transmitting the synchronization signal block to the ue, the base station may transmit a channel occupying signal on a frequency domain resource of the synchronization signal block after a time domain end position of the channel of the synchronization signal block and before a time domain start position of the PDCCH of the remaining system information until information of the PDCCH of the remaining system information is transmitted on a time-frequency resource of the PDCCH of the remaining system information; wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
It should be noted that, for the PDCCH and the PDSCH of the remaining system information, since the frequency domain resources occupied by the PDCCH and the PDSCH are the same and the time domains are continuous, when it is detected that the channel is in the idle state, the information of the PDCCH of the remaining system information is sent to the user equipment on the time domain resources and the frequency domain resources of the PDCCH of the remaining system information; and when the information of the PDCCH of the residual system information is transmitted, transmitting the information of the PDSCH of the residual system information to the user equipment on the time domain resource and the frequency domain resource of the PDSCH of the residual system information. Channel detection is not required after PDCCH transmission of the remaining system information is completed before PDSCH transmission.
S303: and transmitting the information of the PDCCH and/or the information of the PDSCH of the RMSI to the user equipment.
In the embodiment of the present invention, after detecting that the base station sends the synchronization signal block to the user equipment, the base station may send the information of the PDCCH and/or the information of the PDSCH of the RMSI to the user equipment. In one embodiment, when detecting that the PDCCH of the RMSI is idle through a joint detection manner, the base station may transmit information of the PDCCH and/or information of the PDSCH of the RMSI to the user equipment on the time domain resources of the total bandwidth. In an embodiment, when it is detected that a channel of a synchronization signal block is idle by an independent detection method, a base station may transmit information of a PDCCH and/or information of a PDSCH of the RMSI to the user equipment on a time domain resource of the PDCCH of the RMSI.
In one embodiment, before the base station transmits the information of the PDCCH and/or the information of the PDSCH of the remaining system information to the user equipment, the base station may detect whether the PDCCH is idle according to the determined second channel detection mechanism; and if the UE is idle, triggering and executing the sending of PDCCH information and/or PDSCH information of the rest system information to the UE.
When the channel of the synchronization signal block and the PDCCH of the RMSI are detected in a joint detection mode, the channel detection mechanism of the synchronization signal block is the same as that of the PDCCH of the rest system information. In an embodiment, after the base station detects that the SSB is idle and completes transmission of the SSB, the base station may transmit a channel occupying signal on the frequency domain resource of the synchronization signal block after the time domain end position of the channel of the synchronization signal block and before the time domain start position of the PDCCH of the remaining system information until the information of the PDCCH of the remaining system information is transmitted on the time-frequency resource of the PDCCH of the remaining system information. It should be noted that, in this case, the base station does not need to detect the PDCCH of the RMSI, and may directly send the information of the PDCCH of the remaining system information on the time-frequency resource of the PDCCH of the remaining system information.
When the channel of the synchronization signal block and the PDCCH of the RMSI are detected in an independent manner, the channel detection mechanism of the synchronization signal block is different from the channel detection mechanism of the PDCCH of the remaining system information, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block, the base station may detect that the SSB is idle by using the first channel detection mechanism with a low priority, and after the SSB is transmitted, detect the PDCCH of the remaining system information by using the second channel detection mechanism with a higher priority than the first channel detection mechanism, and if the PDCCH of the remaining system information is detected to be idle, the base station may transmit information of the PDCCH of the remaining system information to the user equipment.
For example, assuming that the synchronization signal block uses a channel detection mechanism of a PDSCH in LAA (Licensed Assisted Access), a channel state is first detected according to a first detection granularity, where the first detection granularity may be a defer period (defer period), a duration of each defer period includes 16965 us + m × 9us, and if the channel is in an idle state, a random number N is taken between 0 and q, where q is a contention window value. The channel state is then detected at a second detection granularity, the second detection granularity being 9us. And if the channel is in an idle state, N-1. If the channel is in a busy state, detecting the channel state again according to the first detection granularity, if the channel is in an idle state, subtracting 1 from the random number N again, and recovering to detect the channel with the second detection granularity, and repeating the steps until N is subtracted to 0, which indicates that the channel is idle, and a synchronous signal block can be sent. In practical use, the first detection granularity and the second detection granularity in the channel detection parameters of the synchronization signal block may be different from those in the LAA, and may be smaller. The PDCCH for the remaining system information uses a channel detection mechanism for finding a reference signal (DRS) in LAA, and after transmitting a synchronization signal block, if it is detected that a channel has an idle duration of X us for a short time (shot), the PDCCH information is transmitted immediately.
When the channel of the synchronization signal block and the PDCCH of the RMSI are detected in an independent detection manner, the first channel detection mechanism is the same as the second channel detection mechanism, and the first detection parameter of the channel of the synchronization signal block is different from the second detection parameter of the PDCCH, the base station may detect that the SSB is idle by using the first channel detection mechanism, and may detect the PDCCH of the remaining system information by using the second channel detection mechanism after the SSB is transmitted, and if the PDCCH of the remaining system information is detected to be idle, the base station may transmit information of the PDCCH of the remaining system information to the user equipment.
In one embodiment, the base station may configure a first detection parameter of a channel of the synchronization signal block according to a first priority of the synchronization signal block by acquiring the first priority, and detect whether the channel of the synchronization signal block is idle according to the first detection parameter. When it is detected that the base station sends the synchronization signal block to the user equipment, the base station may obtain a second detection parameter of the PDCCH of the remaining system information, where the second detection parameter is smaller than the first detection parameter, and detect whether the PDCCH of the remaining system information is idle according to the second detection parameter. In an embodiment, the base station may obtain the second detection parameters of the PDCCHs of the remaining system information by obtaining a second priority of the information of the PDCCHs, where the second priority is higher than the first priority, and configuring according to the second priority.
Specifically, for example, assuming that the synchronization signal block uses a channel detection mechanism for PDSCH in LAA, the base station may first detect the channel status according to a first detection granularity, where the first detection granularity may be a deferral period (defer period), and a duration of each defer period includes 1694 + m × 9us, where the first detection granularity includes a second detection granularity, e.g., 9us. If the channel is in an idle state, a random number N may be taken between 0 and q, where q is a first contention window value. The channel state is then detected at a second detection granularity, the second detection granularity being 9us. And N-1 if the channel is in an idle state. If the channel is in a busy state, the channel state is detected again according to the first detection granularity 1lus + M9 us, if the channel is in an idle state, the random number N is reduced by 1 again, the channel detection with the second detection granularity 9us is resumed, and the steps are repeated until the N is reduced to 0, the channel is idle, and a synchronous signal block can be sent. After sending the synchronization signal block, the base station may select a third detection granularity, a fourth detection granularity, a second contention window and a second random number that are smaller than the first detection granularity, the first contention window q and the first random number N according to the first detection granularity, the second detection granularity and the first contention window q, and perform channel detection on the PDCCH, where a process of performing channel detection on the PDCCH using the third detection granularity, the fourth detection granularity, the second contention window and the second random number is the same as the process of detecting an SSB channel by using the first detection granularity, the second detection granularity, the first contention window and the first random number, and is not described here again.
In an embodiment, the base station may detect whether the channel of the synchronization signal block is idle according to a first idle duration of the channel of the synchronization signal block by acquiring the first idle duration. After the base station sends the synchronization signal block to user equipment, second idle time of the PDCCH of the remaining system information can be acquired, wherein the second idle time is less than the first idle time, whether the PDCCH of the remaining system information is idle is detected according to the second idle time, and if the PDCCH is detected to be idle, the information of the PDCCH is sent.
Specifically, for example, assuming that the synchronization signal block uses a channel detection mechanism of DRS in LAA, if it is detected that a channel has an idle duration of X us for a short time (shot), the synchronization signal block is sent. And the base station determines a second idle time length Y us according to the idle time length X us, wherein X is less than Y. The base station may detect whether the PDCCH of the remaining system information is idle according to the second idle duration Y us, and send information of the PDCCH if the PDCCH is detected to be idle.
In the embodiment of the invention, a base station detects whether a channel of a synchronous signal block is idle or not according to a determined first channel detection mechanism, if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment, and then the information of a PDCCH (physical downlink control channel) and/or the information of a PDSCH (physical downlink shared channel) of the rest system information RMSI (physical downlink shared channel) is sent to the user equipment. By adopting the mode, the efficiency of channel detection is improved, and the information sending efficiency is improved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a channel detection apparatus according to an embodiment of the present invention. Specifically, the apparatus includes a first detection module 401, a first sending module 402, and a second sending module 403. Wherein:
a first detecting module 401, configured to detect whether a channel of a synchronization signal block is idle according to a determined first channel detection mechanism;
a first sending module 402, configured to send the synchronization signal block to a user equipment if a channel of the synchronization signal block is idle;
a second sending module 403, configured to send, to the ue, information of a physical downlink control channel PDCCH and/or information of a physical downlink shared channel PDSCH of the remaining system information.
Further, the first detecting module 401 is configured to determine a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the remaining system information, and a bandwidth interval between the channel of the synchronization signal block and the PDCCH of the remaining system information; and detecting whether the channel of the synchronous signal block is idle or not according to the determined first channel detection mechanism on the total bandwidth.
Further, the first sending module 402 is configured to send, after sending the synchronization signal block to the ue, a channel occupying signal on a frequency domain resource of the synchronization signal block after a time domain end position of a channel of the synchronization signal block and before a time domain start position of a PDCCH of the remaining system information, until information of the PDCCH of the remaining system information is sent on a time-frequency resource of the PDCCH of the remaining system information; wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
Further, the apparatus further comprises:
a second detecting module 404, configured to detect whether the PDCCH is idle according to the determined second channel detection mechanism; and if the UE is idle, triggering and executing the sending of PDCCH information and/or PDSCH information of the rest system information to the UE.
Further, the first channel detection mechanism and the second channel detection mechanism are different, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and a first detection parameter of a channel of the synchronization signal block is different from a second detection parameter of the PDCCH.
Further, the first detecting module 401 is configured to obtain a first priority of the synchronization signal block; configuring a first detection parameter of a channel of the synchronization signal block according to the first priority; detecting whether a channel of the synchronous signal block is idle or not according to the first detection parameter;
the first sending module 402 is configured to obtain a second detection parameter of the PDCCH of the remaining system information after sending the synchronization signal block to the ue, where the second detection parameter is smaller than the first detection parameter; and detecting whether the PDCCH of the residual system information is idle or not according to the second detection parameter.
Further, the first detecting module 401 is configured to obtain a second priority of the information of the PDCCH, where the second priority is higher than the first priority; and configuring a second detection parameter of the PDCCH of the remaining system information according to the second priority.
Further, the first detecting module 401 is configured to obtain a first idle duration of a channel of the synchronization signal block; detecting whether a channel of the synchronous signal block is idle or not according to the first idle time length;
the first sending module 402 is configured to obtain a second idle duration of the PDCCH of the remaining system information after sending the synchronization signal block to the ue, where the second idle duration is smaller than the first idle duration; and detecting whether the PDCCH of the residual system information is idle or not according to the second idle time length.
In the embodiment of the present invention, a base station detects whether a channel of a synchronization signal block is idle through a first detection module 401 according to a determined first channel detection mechanism, and if the channel of the synchronization signal block is idle, the base station sends the synchronization signal block to a user equipment through a first sending module, and then sends information of a physical downlink control channel PDCCH and/or information of a physical downlink shared channel PDSCH of remaining system information RMSI to the user equipment through a second sending module. By adopting the mode, the efficiency of channel detection is improved, and the information sending efficiency is improved.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention. Specifically, the base station includes: memory 501, processor 502, and data interface 503.
The memory 501 may include a volatile memory (volatile memory); the memory 501 may also include a non-volatile memory (non-volatile memory); the memory 501 may also comprise a combination of memories of the kind described above. The processor 502 may be a Central Processing Unit (CPU). The processor 502 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. Specifically, the programmable logic device may be, for example, a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.
Further, the memory 501 is used for storing program instructions, and when the program instructions are executed, the processor 502 may call the program instructions stored in the memory 501 for executing the following steps:
detecting whether a channel of a synchronous signal block is idle or not according to the determined first channel detection mechanism;
if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment;
and sending the information of the physical downlink control channel PDCCH and/or the information of the physical downlink shared channel PDSCH of the residual system information RMSI to the user equipment.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the steps of:
determining a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the residual system information, and the bandwidth interval between the channel of the synchronization signal block and the PDCCH of the residual system information;
detecting whether a channel of the synchronization signal block is idle according to the determined first channel detection mechanism over the total bandwidth.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the steps of:
after the time domain end position of the channel of the synchronization signal block and before the time domain start position of the PDCCH of the remaining system information, transmitting a channel occupation signal on the frequency domain resource of the synchronization signal block until the information of the PDCCH of the remaining system information is transmitted on the time-frequency resource of the PDCCH of the remaining system information;
wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the steps of:
detecting whether the PDCCH is idle or not according to the determined second channel detection mechanism;
and if the UE is idle, triggering and executing the sending of PDCCH information and/or PDSCH information of the rest system information to the UE.
Further, the first channel detection mechanism and the second channel detection mechanism are different, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and a first detection parameter of a channel of the synchronization signal block is different from a second detection parameter of the PDCCH.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the steps of:
acquiring a first priority of the synchronization signal block;
configuring a first detection parameter of a channel of the synchronization signal block according to the first priority;
detecting whether a channel of the synchronous signal block is idle or not according to the first detection parameter;
acquiring a second detection parameter of the PDCCH of the remaining system information, wherein the second detection parameter is smaller than the first detection parameter;
and detecting whether the PDCCH of the residual system information is idle or not according to the second detection parameter.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the steps of:
acquiring a second priority of the information of the PDCCH, wherein the second priority is higher than the first priority;
and configuring a second detection parameter of the PDCCH of the remaining system information according to the second priority.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the steps of:
acquiring a first idle time of a channel of the synchronous signal block;
detecting whether a channel of the synchronous signal block is idle or not according to the first idle time length;
acquiring a second idle time of the PDCCH of the remaining system information, wherein the second idle time is less than the first idle time;
and detecting whether the PDCCH of the residual system information is idle or not according to the second idle time length.
In the embodiment of the invention, a base station detects whether a channel of a synchronous signal block is idle according to a determined first channel detection mechanism, if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment, and then the information of a Physical Downlink Control Channel (PDCCH) and/or the information of a Physical Downlink Shared Channel (PDSCH) of the residual system information (RMSI) is sent to the user equipment. By adopting the mode, the efficiency of channel detection is improved, and the information sending efficiency is improved.
In an embodiment of the present invention, a computer-readable storage medium is further provided, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for channel detection described in the embodiment corresponding to fig. 3 of the present invention is implemented, and a system corresponding to fig. 1 or a channel detection apparatus described in the embodiment corresponding to fig. 4 of the present invention may also be implemented, which is not described herein again.
The computer readable storage medium may be an internal storage unit of the apparatus according to any of the preceding embodiments, for example, a hard disk or a memory of the apparatus. The computer readable storage medium may also be an external storage device of the apparatus, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the apparatus. Further, the computer readable storage medium may also include both an internal storage unit and an external storage device of the apparatus. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is intended to be illustrative of only some embodiments of the invention, and is not intended to limit the scope of the invention.

Claims (18)

1. A method for channel detection, comprising:
acquiring a configuration parameter O, wherein the configuration parameter O is used for determining a time domain initial position of a physical downlink control channel PDCCH of the residual system information RMSI corresponding to a synchronization signal block SSB;
when the value of the configuration parameter O is a first preset value, detecting whether a channel of the synchronous signal block is idle or not according to a determined first channel detection mechanism; if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment; sending information of a PDCCH (physical downlink shared channel) of RMSI (physical downlink shared channel) and/or information of a PDSCH (physical downlink shared channel) to the user equipment;
when the value of the configuration parameter O is a second preset value, detecting whether the channel of the synchronous signal block is idle or not according to the determined first channel detection mechanism; if the channel of the synchronous signal block is idle, the synchronous signal block is sent to user equipment; detecting whether the PDCCH of the RMSI is idle or not according to the determined second channel detection mechanism; and if the PDCCH of the RMSI is idle, transmitting the information of the PDCCH and/or the information of the PDSCH of the RMSI to the user equipment.
2. The method of claim 1, wherein detecting whether a channel of a synchronization signal block is idle based on the determined first channel detection mechanism comprises:
determining a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the residual system information, and the bandwidth interval between the channel of the synchronization signal block and the PDCCH of the residual system information;
and detecting whether the channel of the synchronous signal block is idle or not according to the determined first channel detection mechanism on the total bandwidth.
3. The method of claim 2, wherein after the sending the synchronization signal block to the ue, if a value of a configuration parameter O is a first preset value, the method comprises:
after the time domain end position of the channel of the synchronization signal block and before the time domain start position of the PDCCH of the remaining system information, transmitting a channel occupation signal on the frequency domain resource of the synchronization signal block until the information of the PDCCH of the remaining system information is transmitted on the time-frequency resource of the PDCCH of the remaining system information;
wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
4. The method of claim 1,
the first channel detection mechanism and the second channel detection mechanism are different, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block.
5. The method of claim 1,
the first channel detection mechanism is the same as the second channel detection mechanism, and a first detection parameter of a channel of the synchronization signal block is different from a second detection parameter of the PDCCH.
6. The method as claimed in claim 5, wherein said detecting whether a channel of said synchronization signal block is idle based on said determined first channel detection mechanism comprises:
acquiring a first priority of the synchronization signal block;
configuring a first detection parameter of a channel of the synchronization signal block according to the first priority;
detecting whether a channel of the synchronous signal block is idle or not according to the first detection parameter;
after the sending the synchronization signal block to the user equipment, the method includes:
acquiring a second detection parameter of the PDCCH of the remaining system information, wherein the second detection parameter is smaller than the first detection parameter;
and detecting whether the PDCCH of the residual system information is idle or not according to the second detection parameter.
7. The method of claim 6, wherein the obtaining the second detection parameter of the PDCCH of the remaining system information comprises:
acquiring a second priority of the information of the PDCCH, wherein the second priority is higher than the first priority;
and configuring second detection parameters of the PDCCH of the remaining system information according to the second priority.
8. The method of claim 5, wherein said detecting whether a channel of the synchronization signal block is idle based on the determined first channel detection mechanism comprises:
acquiring a first idle time of a channel of the synchronous signal block;
detecting whether a channel of the synchronous signal block is idle or not according to the first idle time length;
after the sending the synchronization signal block to the user equipment, the method includes:
acquiring a second idle time of the PDCCH of the remaining system information, wherein the second idle time is less than the first idle time;
and detecting whether the PDCCH of the residual system information is idle or not according to the second idle time length.
9. A channel sensing apparatus, comprising:
a first detection module, configured to obtain a configuration parameter O, where the configuration parameter O is used to determine a time domain starting position of a physical downlink control channel PDCCH of remaining system information RMSI corresponding to a synchronization signal block SSB; when the value of the configuration parameter O is a first preset value, detecting whether the channel of the synchronous signal block is idle or not according to a determined first channel detection mechanism;
a first sending module, configured to send the synchronization signal block to a user equipment if a channel of the synchronization signal block is idle;
a second sending module, configured to send, to the user equipment, information of a PDCCH of the RMSI and/or information of a PDSCH of a physical downlink shared channel;
the first detection module is further configured to detect whether a channel of the synchronization signal block is idle according to the determined first channel detection mechanism when the value of the configuration parameter O is a second preset value;
the first sending module is further configured to send the synchronization signal block to a user equipment if a channel of the synchronization signal block is idle;
a second detecting module, configured to detect whether the PDCCH of the RMSI is idle according to a determined second channel detection mechanism;
the second sending module is further configured to send, to the user equipment, information of the PDCCH and/or information of the PDSCH of the RMSI if the PDCCH of the RMSI is idle.
10. The apparatus of claim 9,
the first detection module is configured to determine a total bandwidth according to the frequency domain bandwidth of the synchronization signal block, the frequency domain bandwidth of the PDCCH of the remaining system information, and a bandwidth interval between the channel of the synchronization signal block and the PDCCH of the remaining system information; and detecting whether the channel of the synchronous signal block is idle or not according to the determined first channel detection mechanism on the total bandwidth.
11. The apparatus of claim 10, wherein in case the value of the configuration parameter O is a first preset value,
the first sending module is configured to send a channel occupying signal on a frequency domain resource of the synchronization signal block after sending the synchronization signal block to a user equipment, after a time domain end position of a channel of the synchronization signal block and before a time domain start position of a PDCCH of the remaining system information, until information of the PDCCH of the remaining system information is sent on a time-frequency resource of the PDCCH of the remaining system information; wherein the channel occupying signal is used for indicating the frequency domain resource position occupying the total bandwidth.
12. The apparatus of claim 9,
the first channel detection mechanism and the second channel detection mechanism are different, and the priority of the second channel detection mechanism of the PDCCH is higher than the priority of the first channel detection mechanism of the channel of the synchronization signal block.
13. The apparatus of claim 9,
the first channel detection mechanism is the same as the second channel detection mechanism, and a first detection parameter of a channel of the synchronization signal block is different from a second detection parameter of the PDCCH.
14. The apparatus of claim 13,
the first detection module is configured to obtain a first priority of the synchronization signal block; configuring a first detection parameter of a channel of the synchronization signal block according to the first priority; detecting whether a channel of the synchronous signal block is idle or not according to the first detection parameter;
the first sending module is configured to obtain a second detection parameter of the PDCCH of the remaining system information after sending the synchronization signal block to the user equipment, where the second detection parameter is smaller than the first detection parameter; and detecting whether the PDCCH of the residual system information is idle or not according to the second detection parameter.
15. The apparatus of claim 14,
the first detection module is configured to obtain a second priority of the information of the PDCCH, where the second priority is higher than the first priority; and configuring second detection parameters of the PDCCH of the remaining system information according to the second priority.
16. The apparatus of claim 13,
the first detection module is configured to obtain a first idle duration of a channel of the synchronization signal block; detecting whether a channel of the synchronous signal block is idle or not according to the first idle time length;
the first sending module is configured to obtain a second idle duration of the PDCCH of the remaining system information after sending the synchronization signal block to the user equipment, where the second idle duration is smaller than the first idle duration; and detecting whether the PDCCH of the residual system information is idle or not according to the second idle time length.
17. A base station, comprising: a memory for storing program code and a processor for invoking the program code to perform the method of any one of claims 1-8.
18. A computer-readable storage medium, characterized in that the computer storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method according to any of claims 1-8.
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