CN108650049B - Channel detection method, device and base station - Google Patents
Channel detection method, device and base station Download PDFInfo
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- CN108650049B CN108650049B CN201810305372.3A CN201810305372A CN108650049B CN 108650049 B CN108650049 B CN 108650049B CN 201810305372 A CN201810305372 A CN 201810305372A CN 108650049 B CN108650049 B CN 108650049B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
- H04J3/0605—Special codes used as synchronising signal
- H04J3/0608—Detectors therefor, e.g. correlators, state machines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
Abstract
The embodiment of the invention discloses a channel detection method, a device and a base station, wherein the method comprises the following steps: detecting whether a first channel of a first synchronous signal block is idle according to a determined first channel detection mechanism, wherein the first synchronous signal block is a synchronous signal block for cell-defining; detecting whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, wherein the second synchronization signal block is used for non-cell-defining; if the first channel is detected to be idle, transmitting the first synchronization signal block on the first channel; transmitting the second synchronization signal block on the second channel if the second channel is detected to be idle. The embodiment of the invention can realize the detection of the channel of the synchronous signal block in the NR so as to improve the channel detection rate and the sending efficiency of the information in the channel.
Description
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 (5th-Generation, 5G) is faster and faster, and a New wireless technology (New Radio, NR) is developed in the 5G communication, in the New wireless technology NR, two Synchronization Signal Blocks (SSB) are introduced according to the usage of the Synchronization Signal blocks, one is a Synchronization Signal Block for cell-defining, and the other is a Synchronization Signal Block not for cell defining, however, there is no corresponding channel detection mechanism for the two Synchronization Signal blocks.
Disclosure of Invention
Embodiments of the present invention provide a channel detection method, an apparatus, and a base station, which implement detection of a channel of a synchronization signal block in NR to improve accuracy of channel detection.
In a first aspect, an embodiment of the present invention provides a channel detection method, where the method includes:
detecting whether a first channel of a first synchronous signal block is idle according to a determined first channel detection mechanism, wherein the first synchronous signal block is a synchronous signal block for cell-defining;
detecting whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, wherein the second synchronization signal block is used for non-cell-defining;
if the first channel is detected to be idle, transmitting the first synchronization signal block on the first channel;
transmitting the second synchronization signal block on the second channel if the second channel is detected to be idle.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and the first detection parameter of the first channel and the second detection parameter of the second channel are the same.
Further, the first channel detection mechanism is the same as the second channel detection mechanism, and the first detection parameter of the first channel is different from the second detection parameter of the second channel.
Further, the first detection parameter includes a first idle duration, the second detection parameter includes a second idle duration, and the first idle duration is less than or equal to the second idle duration.
Further, the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, and the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, where the first detection granularity is smaller than the third detection granularity, and the first contention window value is smaller than the second contention window value.
Further, the detecting whether the first channel of the first synchronization signal block is idle according to the determined first channel detection mechanism includes:
detecting whether a first channel of the first synchronous signal block is idle according to the first detection granularity;
when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity;
if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
Further, the detecting whether the second channel of the second synchronization signal block is idle according to the determined second channel detection mechanism includes:
detecting whether a second channel of the second synchronization signal block is idle according to the third detection granularity;
when the second channel of the second synchronous signal block is detected to be idle according to the third detection granularity, selecting a second random number within the range from 0 to a second contention window value, and detecting whether the second channel of the second synchronous signal block is idle according to the fourth detection granularity;
if the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle.
Further, the first channel detection mechanism and the second channel detection mechanism are different.
In a second aspect, an embodiment of the present invention provides a channel detection apparatus, including:
a first detection module, configured to detect whether a first channel of a first synchronization signal block is idle according to a determined first channel detection mechanism, where the first synchronization signal block is a synchronization signal block for cell-defining;
a second detection module, configured to detect whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, where the second synchronization signal block is a synchronization signal block for non-cell-defining;
a first sending module, configured to send the first synchronization signal block on the first channel if the first channel is detected to be idle;
a second sending module, configured to send the second synchronization signal block on the second channel if it is detected that the second channel is idle.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and the first detection parameter of the first channel and the second detection parameter of the second channel are the same.
Further, the first channel detection mechanism is the same as the second channel detection mechanism, and the first detection parameter of the first channel is different from the second detection parameter of the second channel.
Further, the first detection parameter includes a first idle duration, the second detection parameter includes a second idle duration, and the first idle duration is less than or equal to the second idle duration.
Further, the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, and the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, where the first detection granularity is smaller than the third detection granularity, and the first contention window value is smaller than the second contention window value.
Further, the first detecting module is configured to detect whether a first channel of the first synchronization signal block is idle according to the first detection granularity; when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity; if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
Further, the second detecting module is configured to detect whether a second channel of the second synchronization signal block is idle according to the third detection granularity; when the second channel of the second synchronous signal block is detected to be idle according to the third detection granularity, selecting a second random number within the range from 0 to a second contention window value, and detecting whether the second channel of the second synchronous signal block is idle according to the fourth detection granularity; if the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle.
Further, the first channel detection mechanism and the second channel detection mechanism are different.
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 first channel of the first synchronization signal block is idle according to the determined first channel detection mechanism and detects that the second channel of the second synchronization signal block is idle according to the determined second channel detection mechanism, the base station may send the first synchronization signal block to the user equipment on the first channel and send the second synchronization signal block to the user equipment on the second channel, thereby implementing detection on channels of two types of synchronization signal blocks in NR and improving sending efficiency of information in the channels.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, 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 structural diagram of a channel detection system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a channel detection method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of another 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, wherein the method can be used for detecting the channel states of two-purpose synchronous signal blocks in NR, wherein one synchronous signal block is used for cell-defining, and the other synchronous signal block is used for non-cell-defining. Of course, in other embodiments, the channel detection method may also be used for other synchronization signal blocks, and the embodiments of the present invention are not limited in particular. 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 synchronization signal block for cell-defining is the remaining system information that the synchronization signal block has corresponding information indicating random access and the like; the synchronization signal block used for non-cell definition has no corresponding residual system information, and can only be used for downlink synchronization, measurement and the like. The channel detection method provided by the embodiment of the invention can respectively design channel detection mechanisms aiming at different types of synchronous signal blocks in the NR technology so as to realize the detection of the channels of the different types of synchronous signal blocks in the NR.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
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 may detect whether a first channel for a cell-defined first synchronization signal block is idle based on the determined first channel detection mechanism and whether a second channel for a non-cell-defined second synchronization signal block is idle based on the determined second channel detection mechanism. The base station may transmit the first synchronization signal block to the user equipment on the first channel if it is detected that the first channel is idle, and may transmit the second synchronization signal block to the user equipment on the second channel if it is detected that the second channel is idle.
In an embodiment, the first channel detection mechanism and the second channel detection mechanism may be the same or different, and the embodiment of the present invention is not limited in particular. In an embodiment, the detection order of detecting the channel of the first synchronization signal block and detecting the channel of the second synchronization signal block is not specifically limited in the embodiments of the present invention. The following describes the channel detection method provided in the embodiment of the present invention in detail.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a channel detection system according to an embodiment of the present invention. As shown in fig. 1, the system includes: a base station 11 and a user equipment 12. The user device 12 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 may be a standalone device such as a Personal Digital Assistant (PDA). The Base station 11 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, base station 11 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 11 may also coordinate the management of attributes of the air interface.
In this embodiment of the present invention, the base station 11 may detect whether a first channel for a cell-defined first synchronization signal block is idle according to a determined first channel detection mechanism, and detect whether a second channel for a non-cell-defined second synchronization signal block is idle according to a determined second channel detection mechanism, and if the first channel is detected to be idle, send the first synchronization signal block on the first channel, and if the second channel is detected to be idle, send the second synchronization signal block on the second channel. In an embodiment, the detection order of detecting the channel of the first synchronization signal block and detecting the channel of the second synchronization signal block is not limited in the embodiment of the present invention.
In one embodiment, the first channel detection mechanism and the second channel detection mechanism may be the same or different. When the first channel detection mechanism and the second channel detection mechanism are the same, the first detection parameter of the first channel and the second detection parameter of the second channel may be the same. In other embodiments, when the first channel detection mechanism and the second channel detection mechanism are the same, the first detection parameter of the first channel and the second detection parameter of the second channel may also be different.
Referring to fig. 2 in detail, fig. 2 is a schematic flow chart of 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.
S201: detecting whether a first channel of the first synchronization signal block is idle according to the determined first channel detection mechanism, and detecting whether a second channel of the second synchronization signal block is idle according to the determined second channel detection mechanism.
In the embodiment of the present invention, the base station may detect whether a first channel for the cell-defined first synchronization signal block is idle according to the determined first channel detection mechanism, and detect whether a second channel for the non-cell-defined second synchronization signal block is idle according to the determined second channel detection mechanism. In an embodiment, a manner of determining the first channel detection mechanism and a manner of determining the second channel detection mechanism are not specifically limited in the embodiment of the present invention. In one embodiment, the base station may first detect whether the first channel is idle and then detect whether the second channel is idle. In other embodiments, the base station may first detect whether the second channel is idle, and then detect whether the first channel is idle, the detection order for detecting whether the first channel is idle and whether the second channel is idle in the embodiments of the present invention is not specifically limited,
the first channel includes first detection parameters and the second channel includes second detection parameters. In one embodiment, when detecting a first channel of the first synchronization signal block and a second channel of the second synchronization signal block using the same channel detection mechanism, the base station may perform channel detection using different detection parameters, where the detection parameters may include an idle duration of the channels. That is, when the first channel detection mechanism is the same as the second channel detection mechanism and the first detection parameter of the first channel is different from the second detection parameter of the second channel, the base station may obtain the first idle duration and obtain the second idle duration, where the first idle duration is less than or equal to the second idle duration. The base station may detect whether a first channel of the first synchronization signal block is idle according to the first idle duration, and detect whether a second channel of the second synchronization signal block is idle according to the second idle duration.
Specifically, for example, it is assumed that a first channel detection mechanism of the first synchronization Signal block is the same as a second channel detection mechanism of the second synchronization Signal block, and both of the first channel detection mechanism and the second channel detection mechanism are channel detection mechanisms for transmitting Discovery Reference Signals (DRSs) in LAA (licensed assisted access). If it is detected that a first detection parameter of a first channel detection mechanism of the first synchronization signal block is different from a second detection parameter of a second channel detection mechanism of the second synchronization signal block, and the first detection parameter is a first idle duration and the second detection parameter is a second idle duration, wherein the first idle duration is less than or equal to the second idle duration, the base station may acquire, according to the channel detection mechanism, that a first idle duration for detecting the first synchronization signal block defined by the cell is X us and that a second idle duration for acquiring the second synchronization signal block defined by the non-detected cell is Y us, where X is Y. The base station may determine the state of the first channel by detecting whether the first channel is idle for the X us duration and determine the state of the second channel by detecting whether the second channel is idle for the Y us duration.
In one embodiment, the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, and the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, wherein the first detection granularity is less than the third detection granularity, and the first contention window value is less than the second contention window value.
In an embodiment, when the base station detects the first channel of the first synchronization signal block and the channel of the second synchronization signal block using the same channel detection mechanism and different detection parameters, the base station may obtain a first detection granularity, a second detection granularity, and a first contention window value included in the first detection parameter, and a third detection granularity, a fourth detection granularity, and a second contention window value included in the second detection parameter.
In an embodiment, when the base station detects the first channel of the first synchronization signal block using the same channel detection mechanism and different detection parameters, the base station may detect whether the first channel of the first synchronization signal block is idle according to the first detection granularity, select a first random number within a range from 0 to a first contention window value when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, and detect whether the first channel of the first synchronization signal block is idle according to the second detection granularity. If the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
Specifically, for example, it is assumed that the base station uses the same channel detection mechanism and is a channel detection mechanism for transmitting the PDSCH in the LAA when detecting the first channel of the first synchronization signal block and the second channel of the second synchronization signal block, where the first detection parameter is a first detection granularity, a second detection granularity, a first contention window is a value q, a first random number is N, and N is selected from a range from 0 to q. The first detection granularity may be a deferral period (defer period), and a duration of each defer period includes 16us + M × 9us, where M is a detection parameter of a channel detection mechanism of the PDSCH, and a value of M is determined according to a priority of a synchronization signal block. The base station may detect whether a channel of the first synchronization signal block is idle according to the 16us + M9 us. If the base station detects that the channel of the first synchronization signal block is idle according to the first detection granularity 16us + M9 us, the base station may select a random number N from contention windows 0 to q, where q is a contention window value. And detecting the first channel by using 9us as a second detection granularity, wherein if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity 9us, the N-1 is carried out. If the channel is in a busy state, detecting the channel state again according to the first granularity value, if the channel is in an idle state, subtracting 1 from the random number N again, and continuing to execute the step of detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity 9us, and repeating the operation until the N is equal to 0, so that the first channel of the first synchronization signal block can be determined to be idle.
In an embodiment, when the base station detects the second channel of the second synchronization signal block using the same channel detection mechanism and different detection parameters, the base station may detect whether the second channel of the second synchronization signal block is idle according to the third detection granularity, select a second random number within a range from 0 to a second contention window value when the second channel of the second synchronization signal block is idle according to the third detection granularity, and detect whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity. If the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle. The specific example is similar to the detection method of the channel of the first synchronization signal block, and is not described herein again.
In one embodiment, when detecting a first channel of the first synchronization signal block and a second channel of the second synchronization signal block using the same channel detection mechanism, a base station may obtain a priority of the channel of the first synchronization signal block and a priority of the second channel of the second synchronization signal block, and configure a first detection parameter of the channel of the first synchronization signal block and a second detection parameter of the channel of the second synchronization signal block according to the priorities; detecting a first channel of the first synchronization signal block according to the first detection parameter, and detecting a second channel of the second synchronization signal block according to the second detection parameter. The first detection parameter is different from the second detection parameter, and the detection parameters may be an M value, a q value, and a detection granularity value in a channel detection mechanism of the PDSCH in the LAA.
For example, when the first and second synchronization signal blocks both use the channel detection mechanism for transmitting PDSCH in LAA, and the first synchronization signal block has higher priority than the second synchronization signal block, the parameters of the channel detection mechanism of the first synchronization signal block make it easier to detect that the channel is idle. The parameter M, q and the detection granularity value in the channel detection mechanism for the first synchronization signal block are both smaller than the parameter M, q and the detection granularity value in the channel detection mechanism for the first synchronization signal block.
In one embodiment, the base station may also use the same detection parameters for channel detection when detecting the channel of the first synchronization signal block and the channel of the second synchronization signal block using the same channel detection mechanism.
In one embodiment, the base station may detect the channel of the first synchronization signal block and the channel of the second synchronization signal block using different channel detection mechanisms. When the first channel detection mechanism and the second channel detection mechanism are different, the base station may detect whether the first channel of the first synchronization signal block is idle according to the determined first channel detection mechanism, and detect whether the second channel of the second synchronization signal block is idle according to the determined second channel detection mechanism. For example, assuming that the first channel detection mechanism is a channel detection mechanism for transmitting DRS in LAA and the second channel detection mechanism is a channel detection mechanism for transmitting PDSCH in LAA, the base station may detect whether the first channel is idle according to the channel detection mechanism from the DRS and whether the second channel is idle according to the channel detection mechanism from the PDSCH. The description of the channel detection mechanism of the DRS and the description of the channel detection mechanism of the PDSCH are as described above, and are not repeated here.
S202: transmitting the first synchronization signal block on the first channel if the first channel is detected to be idle and transmitting the second synchronization signal block on the second channel if the second channel is detected to be idle.
In this embodiment of the present invention, if the base station detects that the first channel is idle, the base station may send the first synchronization signal block to the user equipment on the first channel, and if the base station detects that the second channel is idle, the base station may send the second synchronization signal block to the user equipment on the second channel. Specifically, for example, it is assumed that the first idle duration of the first channel is X us and the second idle duration of the second channel is Y us, where X us is smaller than Y us. If the base station detects that the first channel is idle within the X us time length, the base station can determine that the first channel is idle and send the first synchronization signal block to the user equipment on the first channel, and if the base station detects that the second channel is idle within the Y us time length, the base station can determine that the second channel is idle and send the second synchronization signal block to the user equipment on the second channel.
In the embodiment of the invention, the base station detects whether a first channel of a first synchronous signal block defined by a cell is idle or not according to a determined first channel detection mechanism, detects whether a second channel of a second synchronous signal block defined by a non-cell is idle or not according to a determined second channel detection mechanism, if the first channel is detected to be idle, the first synchronous signal block is sent to the user equipment on the first channel, and if the second channel is detected to be idle, the second synchronous signal block is sent to the user equipment on the second channel, so that the detection of the channels of two kinds of synchronous signal blocks in NR is realized, and the sending efficiency of information in the channels is improved.
Referring to fig. 3 in detail, fig. 3 is a schematic flow chart of another 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 according to the embodiment of the present invention is different from the channel detection method shown in fig. 2 in that the embodiment of the present invention is a description of a first channel detection mechanism for a first channel of a first synchronization signal block when a base station uses the same channel detection mechanism and detection parameters are different, and the method includes the following steps.
S301: and detecting whether a first channel of the first synchronous signal block is idle or not according to the first detection granularity.
In this embodiment of the present invention, a base station may determine a first channel detection mechanism for detecting a first synchronization signal defined by a cell, and according to the determined first channel detection mechanism, acquiring a first detection parameter in the first channel detection mechanism includes: the method comprises the steps of detecting granularity and a first contention window, and acquiring a first random number from the first contention window. The base station may detect whether a first channel of the first synchronization signal block is idle according to the first detection granularity. The explanation of the first detection granularity is as described above and will not be described herein.
S302: and when the first channel of the first synchronous signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity.
In the embodiment of the present invention, when the base station detects that the first channel of the first synchronization signal block is idle according to the first detection granularity, the base station selects a first random number within a range from 0 to the first contention window value, and detects whether the first channel of the first synchronization signal block is idle according to the second detection granularity. Specifically, for example, it is assumed that the determined first channel detection mechanism is a channel detection mechanism for transmitting a PDSCH in LAA, the first contention window is a value q, and the first random number is N, where N is selected from a range from 0 to q. The base station may first detect whether a channel of the first synchronization signal block is idle according to a first detection granularity 16us + M × 9us, where M is a detection parameter of a channel detection mechanism of the PDSCH, and a value of M is determined according to a priority of the synchronization signal block. If the base station detects that the channel of the first synchronization signal block is idle according to the first detection granularity 16us + M9 us, the base station may select a random number N from the contention windows 0 to q, and detect the first channel with the second detection granularity 9 us.
S303: if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
In this embodiment of the present invention, if the base station detects that the first channel of the first synchronization signal block is idle according to the second detection granularity, the first random number is decremented by 1, and the step of detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity is executed until the first random number is equal to 0, and it is determined that the first channel of the first synchronization signal block is idle. For example, according to the above example, if the base station detects that the first channel of the first synchronization signal block is idle according to the second detection granularity 9us, the N-1, and continues to perform the step of detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity 9us until N is equal to 0, it may be determined that the first channel of the first synchronization signal block is idle.
S304: transmitting the first synchronization signal block on the first channel.
In this embodiment of the present invention, if the base station detects that the first channel is idle according to the first detection granularity and the second detection granularity, the base station may send the first synchronization signal block to the user equipment on the first channel.
In the embodiment of the invention, if the base station detects that the first channel of the first synchronous signal block is idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether a first channel of the first synchronization signal block is idle according to a second detection granularity, if the first channel of the first synchronization signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number and performing the step of detecting whether a first channel of the first synchronization signal block is idle according to the second detection granularity, determining that a first channel of the first synchronization signal block is idle when the first random number is equal to 0, and transmitting the first synchronization signal block to the user equipment on the first channel so as to improve the channel detection efficiency and improve the transmission efficiency of information in the channel.
In this embodiment of the present invention, when the first channel detection mechanism is the same as the second channel detection mechanism, but the first detection parameter is different from the second detection parameter, the base station uses the second channel detection mechanism to detect the second channel of the second synchronization signal, and the second channel detection mechanism is the same as the first channel detection mechanism used by the base station in fig. 3 when detecting the first channel of the first synchronization signal, so the second channel detection mechanism of the second channel of the second synchronization signal is not described herein again.
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 second detection module 402, a first sending module 403, and a second sending module 404. Wherein:
a first detecting module 401, configured to detect whether a first channel of a first synchronization signal block is idle according to a determined first channel detection mechanism, where the first synchronization signal block is a synchronization signal block for cell-defining;
a second detecting module 402, configured to detect whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, where the second synchronization signal block is a synchronization signal block for non-cell-defining;
a first sending module 403, configured to send the first synchronization signal block on the first channel if the first channel is detected to be idle;
a second sending module 404, configured to send the second synchronization signal block on the second channel if the second channel is detected to be idle.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and the first detection parameter of the first channel and the second detection parameter of the second channel are the same.
Further, the first channel detection mechanism is the same as the second channel detection mechanism, and the first detection parameter of the first channel is different from the second detection parameter of the second channel.
Further, the first detection parameter includes a first idle duration, the second detection parameter includes a second idle duration, and the first idle duration is less than or equal to the second idle duration.
Further, the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, and the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, where the first detection granularity is smaller than the third detection granularity, and the first contention window value is smaller than the second contention window value.
Further, the first detecting module 401 is configured to detect whether a first channel of the first synchronization signal block is idle according to the first detection granularity; when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity; if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
Further, the second detecting module 402 is configured to detect whether a second channel of the second synchronization signal block is idle according to the third detection granularity; when the second channel of the second synchronous signal block is detected to be idle according to the third detection granularity, selecting a second random number within the range from 0 to a second contention window value, and detecting whether the second channel of the second synchronous signal block is idle according to the fourth detection granularity; if the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle.
Further, the first channel detection mechanism and the second channel detection mechanism are different.
In this embodiment of the present invention, a base station detects, by a first detection module 401 according to a determined first channel detection mechanism, whether a first channel for a first synchronization signal block defined by a cell is idle, detects, by a second detection module 402 according to a determined second channel detection mechanism, whether a second channel for a second synchronization signal block defined by a non-cell is idle, and if the first channel is detected to be idle, sends the first synchronization signal block to a user equipment on the first channel by a first sending module 403, and if the second channel is detected to be idle, sends the second synchronization signal block to the user equipment on the second channel by a second sending module 401, thereby detecting channels of two types of synchronization signal blocks in NR, and improving sending efficiency of information in the channels.
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 first channel of a first synchronous signal block is idle according to a determined first channel detection mechanism, wherein the first synchronous signal block is a synchronous signal block for cell-defining;
detecting whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, wherein the second synchronization signal block is used for non-cell-defining;
if the first channel is detected to be idle, transmitting the first synchronization signal block on the first channel;
transmitting the second synchronization signal block on the second channel if the second channel is detected to be idle.
Further, the first channel detection mechanism and the second channel detection mechanism are the same, and the first detection parameter of the first channel and the second detection parameter of the second channel are the same.
Further, the first channel detection mechanism is the same as the second channel detection mechanism, and the first detection parameter of the first channel is different from the second detection parameter of the second channel.
Further, the first detection parameter includes a first idle duration, the second detection parameter includes a second idle duration, and the first idle duration is less than or equal to the second idle duration.
Further, the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, and the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, where the first detection granularity is smaller than the third detection granularity, and the first contention window value is smaller than the second contention window value.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the following steps:
detecting whether a first channel of the first synchronous signal block is idle according to the first detection granularity;
when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity;
if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
Further, the processor 502 calls program instructions stored in the memory 501 for performing the following steps:
detecting whether a second channel of the second synchronization signal block is idle according to the third detection granularity;
when the second channel of the second synchronous signal block is detected to be idle according to the third detection granularity, selecting a second random number within the range from 0 to a second contention window value, and detecting whether the second channel of the second synchronous signal block is idle according to the fourth detection granularity;
if the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle.
The first channel detection mechanism and the second channel detection mechanism are different.
In the embodiment of the invention, a base station detects whether a first channel of a first synchronous signal block defined by a cell is idle or not according to a determined first channel detection mechanism, detects whether a second channel of a second synchronous signal block defined by a non-cell is idle or not according to a determined second channel detection mechanism, if the first channel is detected to be idle, the first synchronous signal block is sent to user equipment on the first channel, and if the second channel is detected to be idle, the second synchronous signal block is sent to the user equipment on the second channel, so that the detection of the channels of two kinds of synchronous signal blocks in NR is realized, and the sending efficiency of information in the channels 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. 2 or fig. 3 of the present invention may be implemented, or a system corresponding to fig. 1 or a channel detection apparatus corresponding to the embodiment corresponding to the present invention described in fig. 4 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 (10)
1. A method for channel detection, comprising:
detecting whether a first channel of a first synchronous signal block is idle according to a determined first channel detection mechanism, wherein the first synchronous signal block is a synchronous signal block for cell-defining;
detecting whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, where the second synchronization signal block is a synchronization signal block for non-cell definition, the first channel detection mechanism is the same as the second channel detection mechanism, and a first detection parameter of the first channel is different from a second detection parameter of the second channel, where the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, where the first detection granularity is smaller than the third detection granularity, and the first contention window value is smaller than the second contention window value;
if the first channel is detected to be idle, transmitting the first synchronization signal block on the first channel;
transmitting the second synchronization signal block on the second channel if the second channel is detected to be idle.
2. The method of claim 1,
the first detection parameter comprises a first idle duration, the second detection parameter comprises a second idle duration, and the first idle duration is less than or equal to the second idle duration.
3. The method of claim 1, wherein detecting whether the first channel of the first synchronization signal block is idle based on the determined first channel detection mechanism comprises:
detecting whether a first channel of the first synchronous signal block is idle according to the first detection granularity;
when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity;
if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
4. The method of claim 1, wherein detecting whether a second channel of a second synchronization signal block is idle based on the determined second channel detection mechanism comprises:
detecting whether a second channel of the second synchronization signal block is idle according to the third detection granularity;
when the second channel of the second synchronous signal block is detected to be idle according to the third detection granularity, selecting a second random number within the range from 0 to a second contention window value, and detecting whether the second channel of the second synchronous signal block is idle according to the fourth detection granularity;
if the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle.
5. A channel sensing apparatus, comprising:
a first detection module, configured to detect whether a first channel of a first synchronization signal block is idle according to a determined first channel detection mechanism, where the first synchronization signal block is a synchronization signal block for cell-defining;
a second detecting module, configured to detect whether a second channel of a second synchronization signal block is idle according to a determined second channel detection mechanism, where the second synchronization signal block is a synchronization signal block for non-cell definition, the first channel detection mechanism is the same as the second channel detection mechanism, and a first detection parameter of the first channel is different from a second detection parameter of the second channel, where the first detection parameter includes a first detection granularity, a second detection granularity, and a first contention window value, the second detection parameter includes a third detection granularity, a fourth detection granularity, and a second contention window value, where the first detection granularity is smaller than the third detection granularity, and the first contention window value is smaller than the second contention window value;
a first sending module, configured to send the first synchronization signal block on the first channel if the first channel is detected to be idle;
a second sending module, configured to send the second synchronization signal block on the second channel if it is detected that the second channel is idle.
6. The apparatus of claim 5,
the first detection parameter comprises a first idle duration, the second detection parameter comprises a second idle duration, and the first idle duration is less than or equal to the second idle duration.
7. The apparatus of claim 5,
the first detection module is configured to detect whether a first channel of the first synchronization signal block is idle according to the first detection granularity; when the first channel of the first synchronization signal block is detected to be idle according to the first detection granularity, selecting a first random number within the range from 0 to a first contention window value, and detecting whether the first channel of the first synchronization signal block is idle according to the second detection granularity; if the first channel of the first synchronous signal block is detected to be idle according to the second detection granularity, subtracting 1 from the first random number, executing the step of detecting whether the first channel of the first synchronous signal block is idle according to the second detection granularity until the first random number is equal to 0, and determining that the first channel of the first synchronous signal block is idle.
8. The apparatus of claim 5,
the second detection module is configured to detect whether a second channel of the second synchronization signal block is idle according to the third detection granularity; when the second channel of the second synchronous signal block is detected to be idle according to the third detection granularity, selecting a second random number within the range from 0 to a second contention window value, and detecting whether the second channel of the second synchronous signal block is idle according to the fourth detection granularity; if the second channel of the second synchronization signal block is detected to be idle according to the fourth detection granularity, subtracting 1 from the second random number, and executing the step of detecting whether the second channel of the second synchronization signal block is idle according to the fourth detection granularity until the second random number is equal to 0, and determining that the second channel of the second synchronization signal block is idle.
9. 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 1-4.
10. 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 1-4.
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| CN107736060A (en) * | 2015-06-15 | 2018-02-23 | 瑞典爱立信有限公司 | Variable synchronization block format |
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| WO2018045307A1 (en) * | 2016-09-02 | 2018-03-08 | Intel IP Corporation | Paging with unified single and multi-beam operation support in new radio |
| CN107528682A (en) * | 2017-09-20 | 2017-12-29 | 宇龙计算机通信科技(深圳)有限公司 | The sending method and device of reference signal |
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