CN111417213A - Signal transmission method, device, related equipment and storage medium - Google Patents
Signal transmission method, device, related equipment and storage medium Download PDFInfo
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- CN111417213A CN111417213A CN201910013564.1A CN201910013564A CN111417213A CN 111417213 A CN111417213 A CN 111417213A CN 201910013564 A CN201910013564 A CN 201910013564A CN 111417213 A CN111417213 A CN 111417213A
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- 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 invention discloses a signal transmission method, a device, a network device, a terminal and a storage medium, wherein the method comprises the steps that the network device distributes a plurality of time domain signals of one signal transmission period to a plurality of frequency domain sub-bands for transmission, the signals are synchronous broadcast signals, the sub-bands are subjected to listen-before-talk (L BT) channel interception before the signal transmission time, and corresponding signals are transmitted at the transmission time when the sub-band channel interception is idle.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a signal transmission method, apparatus, related device, and storage medium.
Background
In a fifth generation mobile communication technology (5G) system, in order to improve the coverage of a synchronization signal and a physical broadcast channel, a beam scanning function is introduced into the 5G synchronization signal and the physical broadcast channel.
Compared with the long Term Evolution (L TE, &ttttranslation =) L "&tttl &ttt/t &tttong Term Evolution) system of the fourth generation mobile communication technology (4G), in the 5G New air interface (NR, New Radio) system, in order to support the beam scanning function, a synchronization signal is largely different from a physical broadcast channel in terms of physical resource arrangement.
However, for the 5G unlicensed band NR system, since a listen-before-talk (L BT, &tttttransmission = L "&tttl &ttt/t &tttistenbefore talk) mechanism is followed before transmitting a signal, it cannot be guaranteed that transmission resources of a synchronization signal and a physical broadcast channel can be preempted to channel resources at a time, and transmission opportunities of the synchronization signal and the physical broadcast channel in the 5G unlicensed band system are reduced.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present invention provide a signal transmission method, a signal transmission apparatus, a related device, and a storage medium.
The embodiment of the invention provides a signal transmission method, which is applied to network equipment and comprises the following steps:
distributing a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission; the signal is a synchronous broadcast signal; wherein the content of the first and second substances,
l BT channel sensing is carried out on the sub-band before the signal transmission time, and when the sub-band channel sensing is idle, the corresponding signal is transmitted at the transmission time.
In the above scheme, the detecting of the BT channel on the sub-band by L includes:
before the sub-band sending time, reserving a time interval of a first duration to carry out L BT channel monitoring;
when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
In the above scheme, all time domain signals in one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission;
l BT channel sensing is carried out before each signal transmission moment in the frequency domain, and a second time length is reserved between two adjacent signal transmission moments for carrying out L BT channel sensing on a signal transmitted later.
In the above scheme, when the time-domain signals of one signal transmission period are distributed to a plurality of subbands in the frequency domain for transmission, the method further includes at least one of:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
In the above scheme, one sub-band is a partial Bandwidth (BWP).
In the foregoing solution, when the time-domain signals of one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission, the method further includes:
and when the sub-band channel is sensed to be idle, transmitting a corresponding signal according to the signal index sequence specified by the communication protocol.
In the foregoing solution, when the time-domain signals of one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission, the method further includes:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
The embodiment of the invention also provides a signal transmission method, which is applied to a terminal and comprises the following steps:
detecting the signal in the whole system bandwidth in a time domain detection window of the signal;
alternatively, the first and second electrodes may be,
in a time domain detection window of the signal, detecting the signal on a plurality of sub-bands corresponding to a frequency domain in a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
In the foregoing solution, the detecting signals in a polling manner on a plurality of subbands corresponding to a frequency domain includes:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
An embodiment of the present invention further provides a signal transmission apparatus, including:
a transmission unit, configured to distribute a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission; the signal is a synchronous broadcast signal;
and the monitoring unit is used for carrying out L BT channel monitoring on the sub-band before the signal transmission time, and when the sub-band channel monitoring is idle, the transmission unit transmits a corresponding signal at the transmission time.
In the scheme, the monitoring unit is specifically configured to reserve a time interval of a first duration before the sub-band sending time to perform L BT channel monitoring;
the transmission unit is specifically configured to: when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
In the above scheme, all time domain signals in one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission;
the monitoring unit is specifically used for carrying out L BT channel monitoring before each signal transmission time in a frequency domain, and reserving a second time length between two adjacent signal transmission times for carrying out L BT channel monitoring on a later-transmitted signal.
In the foregoing solution, the transmission unit is further configured to perform at least one of the following operations:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
In the foregoing scheme, the transmission unit is further configured to:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
An embodiment of the present invention further provides a signal transmission apparatus, including:
a determination unit;
a detection unit to:
detecting the signal in the whole system bandwidth in the time domain detection window of the signal determined by the determining unit;
alternatively, the first and second electrodes may be,
in the time domain detection window of the signal determined by the determining unit, detecting the signal on a plurality of sub-bands corresponding to the frequency domain by adopting a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
In the foregoing solution, the detecting unit is specifically configured to:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
An embodiment of the present invention further provides a network device, including: a first processor and a first communication interface; wherein the content of the first and second substances,
the first communication interface is used for distributing a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission; the signal is a synchronous broadcast signal;
the first processor is configured to perform L BT channel sensing on a subband through the first communication interface before a signal transmission time, and when the subband channel sensing is idle, the first communication interface transmits a corresponding signal at the transmission time.
In the above scheme, the first processor is specifically configured to reserve a time interval of a first duration before the sub-band transmission time to perform L BT channel listening;
the first communication interface is specifically configured to: when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
In the above scheme, all time domain signals in one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission;
the first processor is specifically used for carrying out L BT channel monitoring before each signal transmission time in a frequency domain, and reserving a second time length between two adjacent signal transmission times for carrying out L BT channel monitoring on a later-transmitted signal.
In the foregoing solution, the first communication interface is further configured to perform at least one of the following operations:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
In the foregoing solution, the first communication interface is further configured to:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
An embodiment of the present invention further provides a terminal, including: a second processor and a second communication interface; wherein the content of the first and second substances,
the second processor is configured to, via a second communication interface:
detecting the signal in the whole system bandwidth in a time domain detection window of the signal;
alternatively, the first and second electrodes may be,
in a time domain detection window of the signal, detecting the signal on a plurality of sub-bands corresponding to a frequency domain in a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
In the foregoing solution, the second processor is specifically configured to:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
An embodiment of the present invention further provides a network device, including: a first processor and a first memory for storing a computer program capable of running on the processor,
wherein the first processor is configured to execute the steps of any one of the methods of the network device side when running the computer program.
An embodiment of the present invention further provides a terminal, including: a second processor and a second memory for storing a computer program capable of running on the processor,
wherein the second processor is configured to execute the steps of any of the above-mentioned methods of the terminal side when running the computer program.
An embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any method on the network device side or implements the steps of any method on the terminal side.
According to the signal transmission method, the signal transmission device, the related equipment and the storage medium, network equipment distributes a plurality of time domain signals of a signal transmission period to a plurality of frequency domain subbands for transmission, the signals are synchronous broadcast signals, before the signal transmission time, the network equipment carries out L BT channel monitoring on the subbands, when the subband channel monitoring is idle, corresponding signals are transmitted at the transmission time, a terminal adopts a polling mode to detect the signals on the whole system bandwidth detection signals or the corresponding subbands of the frequency domain in a signal time domain detection window, for an unauthorized frequency band system, as the synchronous broadcast signals are distributed to the frequency domain, a frequency domain subband L is introduced to preempt the BT channel and transmit the synchronous broadcast signals on the corresponding subbands, the transmission opportunity of the synchronous broadcast signals is increased on the frequency domain, and therefore the transmission efficiency of the synchronous broadcast signals is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the SSB structure in the 5G NR system;
FIG. 2 is a schematic diagram of SSB mapping patterns of the cases A and B, C below 6 GHz;
FIG. 3 is a schematic diagram of SSB mapping patterns of the frequency bands Case D and E above 6 GHz;
fig. 4 is a schematic flow chart of a signal transmission method at a network device side according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a signal transmission method according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a plurality of NR time-domain continuous SSBs that are continuously transmitted when a sub-band channel is idle according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the process of sub-band L BT channel sensing before each SSB transmission in the second frequency domain according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a signal transmission apparatus according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another signal transmission apparatus according to an embodiment of the present invention;
FIG. 10 is a diagram illustrating a network device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a signal transmission system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, in a 5G NR system (licensed band system), a synchronization signal/Physical broadcast channel Block (SSB, SS/PBCH Block) with a bandwidth of 20 Physical Resource Blocks (PRB) and occupying 4 consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols is formed by a primary synchronization signal and a secondary synchronization signal and a broadcast channel.
By adopting the above design, that is, by adopting the design of sending the synchronization signal and the physical broadcast channel on the continuous symbols, the base station can fix the scanned beam direction on the 4 continuous symbols to avoid frequent beam switching, and can also use the Secondary Synchronization Signal (SSS) as the reference signal as the auxiliary reference signal for demodulation of PBCH to further improve the demodulation performance of PBCH.
For the authorized frequency band system, a maximum of L is designed in a 5G NR system in one synchronous signal periodmaxTransmission positions of SSBs in Rel-15 release 5G NR standard, the maximum number of SSBs in a period is L for frequency bands below 3GHzmaxCan reach 4, and the maximum SSB number can reach L on the frequency band of 3GHz-6GHzmaxFor the frequency band above 6GHz, the maximum SSB number can reach Lmax＝64。
From the distribution of SSBs in time domain positions, all SSB positions in the same period are limited to be sent within 5 ms. The structure can ensure that the terminal completes the measurement of all SSBs within 5ms without opening a measurement window for multiple times within one period, thereby being beneficial to the terminal measurement and saving the power consumption. Meanwhile, in the 5G NR system, for a macro coverage scenario, the base station generally needs to configure a semi-static frame structure. Under the semi-static frame structure, the downlink resources are usually configured in the first half of the downlink and uplink switching period, and SSBs in one period are collectively placed in 5ms for transmission, which is beneficial to placing the SSBs in the downlink resources configured in the semi-static frame structure.
The specific time domain distribution position of the SSB within a 5ms time window is related to the SSB subcarrier spacing and frequency band. Currently, the third generation partnership project (3GPP) agreement provides five SSB arrangements in the NR licensed band system, wherein the cases a and B, C are for the band below 6GHz, and the cases D and E are for the high frequency millimeter waves. The specific positions of SSBs in various arrangements are as follows:
1. case a: scenario for 15KHz SSB subcarrier spacing, the position index of the first symbol of SSB is {2,8} +14 × n, for bands below 3GHz, n is 0,1 (L)max4), i.e. occupying only 2 slots (slots), and n is 0,1,2,3 (L) for the 3GHz-6GHz bandmax8), it takes up 4 slots, as shown in fig. 2.
2. Case B: for the 30KHz SSB subcarrier spacing scenario. The first symbol position of the SSB is numbered 4,8,16,20 +28 x n. For the frequency bands below 3GHz,n＝0(Lmax4) for the 3GHz-6GHz band, n is 0,1 (L)max8) as shown in fig. 2.
3. Case C, scenario for 30KHz subcarrier spacing, SSB has a first symbol position index of 2,8, +14 × n, for bands below 3GHz, n is 0,1 (L)max4) for the 3GHz-6GHz band n is 0,1,2,3 (L)max8) as shown in fig. 2.
4. And in Case of a 120KHz SSB subcarrier spacing scenario, the first symbol position of the SSB is {4,8,16,20} +28 x n, and for a high frequency band above 6GHz, n is 0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18 (L)max64) as shown in fig. 3.
5. Case E, for the scenario where the SSB subcarrier spacing is 240KHz, the first symbol position of the SSB is {8,12,16,20,32,36,40,44} +56 × n, and for the high band above 6GHz, n is 0,1,2,3,5,6,7,8 (L)max64) as shown in fig. 3.
In fig. 2 and 3, four OFDM symbols with the same pattern represent one SSB to be transmitted.
In an Unlicensed Band (Unlicensed Band) system, SSB transmission is subject to a L BT transmission mechanism, that is, a base station needs to reserve a guard interval (GAP) before transmitting signals, and in this guard interval, it is monitored whether a channel is idle (for example, the base station performs One-slot L BT listening for a short slot before transmitting SSB signals, the short slot has a length of 16 μ s or 25 μ s), if the channel is idle, transmission is allowed, if the channel is occupied, transmission is not allowed, which is restricted by the Unlicensed Band L BT transmission mechanism, it is required to monitor whether the channel is idle before transmitting a synchronization signal and a broadcast channel (i.e., SSB) in a 5G Unlicensed Band system, for transmission before each SSB also uses a narrow Beam scanning mode, each SSB is transmitted on each Beam (Beam), and when each SSB transmission needs to be switched to a corresponding Beam (Beam) and each SSB transmission needs to seize.g. a time when each SSB transmission is transmitted, it needs to determine that the GAP can be preempted by a narrow Beam scanning mode, if the SSB transmission mode is not used, each SSB needs to perform a change from a different transmission mode, for example, if the ssbb is designed to a multiple ssbbs, a transmission mode, which is designed for a transmission is not to reduce a ssbbs, for a transmission time when each ssbb (e.g is designed for a ssbbs), which is designed to be changed from a ssbbs), and a ssbbs, which is designed to a ssbbs, a ssbbs is designed to be changed from a ssbbs.
On the other hand, transmission in the unlicensed band also needs to meet the Regulation (regulatory) requirement (european telecommunications standardization institute (ETSI) Regulation), that is, a signal with 99% energy occupies 80% -100% of the channel bandwidth, and such a Regulation may be referred to as an OCB Regulation, which is mainly aimed at keeping bandwidth resources available. However, in the NR system of the licensed band, the SSB only occupies 20PRB in the middle of the frequency domain, and the SSB channels at subcarrier intervals of 15KHz, 30KHz, 120KHz, 240KHz, etc., occupy bandwidths of 3.6MHz, 7.2MHz, 28.8MHz, and 57.6MHz, respectively. If the resource transmission mode of SSB in the NR system of the licensed band is directly used in the NR system of the 5G unlicensed band, the OCB regulation condition cannot be satisfied.
Based on this, in various embodiments of the present invention, a plurality of synchronization broadcast signals (referred to as SSBs in the following description) are distributed to the frequency domain, frequency domain subbands (which may be expressed as subbands) are introduced to L BT preemption channels and SSBs are transmitted in the corresponding subbands.
An embodiment of the present invention provides a signal transmission method, which is applied to a network device, (such as a base station, etc.), and as shown in fig. 4, the method includes:
step 400: distributing a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission;
here, the signal is SSB. That is, the embodiment of the present invention provides a method for transmitting a synchronization broadcast signal.
And step 401, carrying out L BT channel sensing on the sub-band before the signal transmission time, and transmitting a corresponding signal at the transmission time when the sub-band channel sensing is idle.
Here, transmitting the corresponding synchronization broadcast signal on the idle sub-band means: the corresponding SSB is transmitted on one or more idle sub-bands as needed. That is, when a sub-band sub-channel is sensed as idle, the corresponding SSB is transmitted on that sub-band.
In one embodiment, L BT channel listening on a subband includes:
before the sub-band sending time, reserving a time interval of a first duration to carry out L BT channel monitoring;
when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
One or more time-domain continuous signals are transmitted at the sub-band transmission time, so that the transmission opportunity of the SSB in the time domain can be improved.
The first duration may be determined as desired, for example 16 μ s or 25 μ s if One-slot L BT is performed.
Here, in practical application, L BT has two mechanisms, One is Cat 4L BT, which requires a longer time period for L BT procedure, and the other is One-slot L BT, which means that the base station only needs L BT (for example, 16 μ s or 25 μ s) with a shorter slot before transmitting signal, and if the channel of this short slot is idle, the base station allows transmission, so that the One-slot L BT has higher priority for channel preemption than Cat 4L BT.
In one embodiment, all time domain signals in one signal transmission period are distributed to a plurality of sub-bands on a frequency domain for transmission;
l BT channel sensing is carried out before each signal transmission moment in the frequency domain, and a second time length is reserved between two adjacent signal transmission moments for carrying out L BT channel sensing on a signal transmitted later.
Here, this approach is applicable to the SSB transmission approach based on narrow beam scanning.
In practical applications, the second time duration may also be determined as needed, for example, if One-slot L BT is performed, the second time duration may be 16 μ s or 25 μ s.
In practical application, since signals are transmitted in an unlicensed frequency band, the transmission of the signals needs to meet the OCB regulation condition, that is, the OCB is not lower than 80%.
Based on this, in an embodiment, when the time domain signals of one signal transmission period are distributed to a plurality of subbands on the frequency domain for transmission, the method further includes at least one of:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
the frequency domain resources of the signals transmitted by the sub-bands are distributed over the whole system bandwidth (like comb-shaped).
In one embodiment, one sub-band is one BWP.
In an embodiment, when the time domain signals of one signal transmission period are distributed to a plurality of subbands in the frequency domain for transmission, the method further includes:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
Here, the signal is simultaneously transmitted on at least two sub-bands which are idle in a manner that SSB repeatedly transmits in a frequency domain, which may be referred to as a Frequency Division Multiplexing (FDM) manner.
In an embodiment, when the time-domain signals of one signal transmission period are distributed to a plurality of subbands in the frequency domain for transmission, the method may further include:
and when the sub-band channel is sensed to be idle, transmitting a corresponding signal according to the signal index sequence specified by the communication protocol.
Here, since the signal is transmitted using the signal index timing specified by the communication protocol, the transmission timing of the SSB does not need to be modified, and the implementation is easy without an additional increase in cost.
In practical application, the communication protocol is suitable for 5G networks and subsequent evolution networks.
Correspondingly, the embodiment of the invention also provides a signal transmission method, which is applied to a terminal and comprises the following steps:
detecting the signal in the whole system bandwidth in a time domain detection window of the signal;
alternatively, the first and second electrodes may be,
in a time domain detection window of the signal, detecting the signal on a plurality of sub-bands corresponding to a frequency domain in a polling mode; wherein the content of the first and second substances,
the signal is SSB.
In an embodiment, the detecting signals in a polling manner on a plurality of subbands corresponding to a frequency domain includes:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
As shown in fig. 5, the signal transmission method provided in the embodiment of the present invention includes the following steps:
step 501: the network equipment distributes a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission;
here, the signal is SSB.
Wherein, before the signal transmission time, the network device carries out L BT channel sensing on the sub-band, and when the sub-band channel sensing is idle, the corresponding signal is transmitted at the transmission time.
Step 502: and the terminal detects the signal in a time domain detection window of the signal by adopting a polling mode on the whole system bandwidth detection signal or a plurality of sub-bands corresponding to the frequency domain.
It should be noted that: the specific processing procedures of the network device and the terminal have been described in detail above, and are not described in detail here.
The signal transmission method provided by the embodiment of the invention comprises the steps that a network device distributes a plurality of time domain signals of a signal transmission period to a plurality of frequency domain subbands for transmission, the signals are SSBs, before the signal transmission time, the network device carries out L BT channel monitoring on the subbands, when the subband channel monitoring is idle, the corresponding signals are transmitted at the transmission time, and a terminal detects the signals in a polling mode on the whole system bandwidth detection signals or the plurality of frequency domain corresponding subbands in a time domain detection window of the signals.
In addition, frequency domain resources of signals sent by the sub-bands are distributed on two sides of the system bandwidth; or, the frequency domain resources of the signals sent by the sub-bands are distributed in the whole system bandwidth (similar to comb-shaped), so that the OCB regulation condition can be satisfied.
Besides, one sub-band is one BWP, the sub-band SSB may correspond to different BWPs, and when the bandwidth capability of the terminal is limited, the sub-band BWP may be the detected bandwidth, so that the terminal can be guaranteed to receive the SSB.
The present invention will be described in further detail with reference to the following application examples.
In the present embodiment, the gNB of the 5G NR unlicensed band (NR-U) system listens to the sub-band channel with One-slot L BT in the sub-band (for example, L BT listening duration is 25 μ s) before the transmission time of the SSB, and when it is sensed that the sub-band channel is idle (idle), at least One SSB or a plurality of SSBs consecutive in time domain (as shown in fig. 6) can be transmitted (SSB transmission mode only suitable for wide beam scanning and SSB Pattern (Pattern) consecutive in time domain corresponding to a plurality of SSB indexes (indexes) — wherein, fig. 6 shows a Pattern of a plurality of NR consecutive SSBs continuously transmitted when the sub-band channel is idle in 240KHz subcarrier interval (Case E), specifically, fig. 6A shows a Pattern of a plurality of NR consecutive SSBs continuously transmitted when the sub-band channel is idle in One time domain 0.25ms, fig. 6B shows a Pattern of a plurality of NR consecutive SSBs continuously transmitted when the sub-band channel is idle in the next time domain 0.25ms,
indicating that the BT listening of the sub-band L fails, that is, the sub-band channel is busy;
indicating success of the BT listening in sub-band L, i.e. sensing sub-band informationThe track is free. .
In this embodiment, one sub-band may be one BWP.
In the embodiment of the present application, the sub-band for transmitting SSB may be distributed to both sides of the bandwidth to meet the OCB requirement, and the sub-band for transmitting SSB may also be distributed to the whole bandwidth (like comb-shaped) to meet the OCB requirement.
By adopting the scheme of the embodiment, the transmission time sequence of the NR SSB in the related communication protocol is not required to be modified, at least one or more SSBs with continuous time domains can be transmitted after L BT succeeds, and the transmission opportunity of the SSBs in the time domains can be improved.
Application example two
In the present embodiment, the gNB of the NR-U system distributes all SSBs in One SSB period defined in the NR protocol to frequency domain subbands for transmission, and performs a subband L BT channel sensing in the frequency domain (e.g. with One-slot L BT sensing subband channel, for example, L BT sensing duration 16 μ s) before the transmission time of each SSB, when SSBs corresponding to adjacent SSBs are consecutive in the time domain, an SSB consecutive in the interval (puncature) time domain is reserved L BT GAP, that is, between two adjacent SSB transmission times, L BT GAP is reserved, One SSB for post-transmission performs L BT channel sensing, and transmits the corresponding SSB when the subband channel is idle, as shown in fig. 7, wherein fig. 7 shows a subband L BT channel sensing process performed before each SSB transmission in the frequency domain at a subcarrier interval (Case E) of 240KHz, specifically, fig. 7A shows a subband 6725.25 ms BT channel sensing process performed in the frequency domain, fig. 7 shows a subband L BT channel sensing process performed in the time domain BT sub-bs interval (abe E),
indicating that the BT listening of the sub-band L fails, that is, the sub-band channel is busy;
indicating that the subband L BT listening was successful, i.e., that the subband channel is idle.
In the present embodiment, a sub band may be a BWP.
In the embodiment of the present application, the sub-band for transmitting SSB may be distributed to both sides of the bandwidth to meet the OCB requirement, and the sub-band for transmitting SSB may also be distributed to the whole bandwidth (like comb-shaped) to meet the OCB requirement.
By adopting the scheme of the application embodiment, the SSB sending time sequence defined in the NR protocol is not required to be modified, the SSB sending based on narrow beam scanning can be supported, and the occupied bandwidth of a channel can be expanded.
It should be noted that, in the application embodiment of the present invention, 240KHz subcarrier spacing is taken as an example to illustrate the mapping relationship between SSB transmission and subband L BT channel sensing, that is, the mapping relationship between SSB pattern and subband L BT channel sensing, and similar SSB patterns may also be available for the Case of 5G NR with other subcarrier spacing (Case a, B, C, D).
As can be seen from the above description, the scheme of this embodiment of this application, which distributes multiple SSBs to the frequency domain, introduces the frequency domain sub-band L BT to preempt the channel and transmit the SSBs in the corresponding sub-band, has the following beneficial effects:
first, SSBs that can be adapted to transmit NR-U systems;
secondly, the transmission efficiency of the SSB is improved by increasing the SSB transmission opportunity in the frequency domain;
thirdly, the time domain time sequence relation of the SSB index in the 5G NR protocol does not need to be changed.
In addition, the sub-bands for transmitting the SSB are distributed on both sides of the system bandwidth in the frequency domain, or distributed over the entire system bandwidth (a comb-like structure), so that the OCB regulation requirement can be satisfied.
In addition, the sub-band SSB may correspond to BWPs with different 5G NRs, and when the bandwidth capability of the terminal is limited, the terminal may try to detect the SSB according to the SSB index sequence in the existing NR protocol on the different sub-band BWPs according to the sub-band BWP as the detected bandwidth, so as to ensure that the terminal receives the SSB.
In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a signal transmission apparatus, which is disposed on a network device, and as shown in fig. 8, the apparatus includes:
a transmission unit 82, configured to distribute a plurality of signals in the time domain of one signal transmission period to a plurality of subbands in the frequency domain for transmission; the signal is a synchronous broadcast signal;
a listening unit 81 for L BT channel listening on the sub-band before the signal transmission time, and when the sub-band channel listening is idle, the transmission unit 82 transmits the corresponding signal at the transmission time.
In an embodiment, the listening unit 81 is specifically configured to perform L BT channel listening by reserving a time interval of a first duration before the sub-band transmission time;
the transmission unit 82 is specifically configured to: when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
One or more time-domain continuous signals are transmitted at the sub-band transmission time, so that the transmission opportunity of the SSB in the time domain can be improved.
In one embodiment, all time domain signals in one signal transmission period are distributed to a plurality of sub-bands on a frequency domain for transmission;
the monitoring unit 81 is specifically configured to perform L BT channel monitoring before each signal transmission time in the frequency domain, and reserve a second time duration between two adjacent signal transmission times for performing L BT channel monitoring on a later-transmitted signal.
In practical application, since signals are transmitted in an unlicensed frequency band, the transmission of the signals needs to meet the OCB regulation condition, that is, the OCB is not lower than 80%.
Based on this, in an embodiment, the transmission unit is further configured to perform at least one of the following operations:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
In an embodiment, the transmission unit 82 is further configured to:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
In an embodiment, the transmission unit 82 is further configured to transmit corresponding signals according to a signal index timing sequence specified by a communication protocol when the sub-band channel sensing is idle. Here, since the signal is transmitted using the signal index timing specified by the communication protocol, the transmission timing of the SSB does not need to be modified, and the implementation is easy without an additional increase in cost.
In practical applications, the listening unit 81 and the transmitting unit 82 may be implemented by a processor in the signal transmission device in combination with a communication interface.
In order to implement the method of the terminal side in the embodiment of the present invention, an embodiment of the present invention further provides a signal transmission apparatus, which is disposed on a terminal, and as shown in fig. 9, the apparatus includes:
a determination unit 91;
a detection unit 92 for:
detecting a signal in the entire system bandwidth within a time domain detection window of the signal determined by the determining unit 91;
alternatively, the first and second electrodes may be,
in the time domain detection window of the signal determined by the determining unit 91, detecting the signal on a plurality of sub-bands corresponding to the frequency domain by adopting a polling mode; wherein the content of the first and second substances,
the signal is SSB.
In an embodiment, the detecting unit 92 is specifically configured to:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
In practical applications, the determining unit 91 may be implemented by a processor in the signal transmission device, and the detecting unit 92 may be implemented by a processor in the signal transmission device in combination with a communication interface.
It should be noted that: in the signal transmission device provided in the above embodiment, only the division of the program modules is exemplified when performing signal transmission, and in practical applications, the processing distribution may be completed by different program modules according to needs, that is, the internal structure of the device may be divided into different program modules to complete all or part of the processing described above. In addition, the signal transmission device and the signal transmission method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.
Based on the hardware implementation of the program module, and in order to implement the method on the network device side in the embodiment of the present invention, an embodiment of the present invention further provides a network device, as shown in fig. 10, where the network device 100 includes:
a first communication interface 101 capable of performing information interaction with a terminal;
the first processor 102 is connected to the first communication interface 101 to implement information interaction with a terminal, and is configured to execute a method provided by one or more technical solutions of the network device side when running a computer program. And the computer program is stored on the first memory 103.
Specifically, the first communication interface 101 is configured to distribute a plurality of signals in a time domain of one signal transmission cycle to a plurality of subbands in a frequency domain for transmission; the signal is SSB;
the first processor 102 is configured to perform L BT channel sensing on a subband through the first communication interface 101 before a signal transmission time, and when the subband channel sensing is idle, the first communication interface 101 transmits a corresponding signal at the transmission time.
In an embodiment, the first processor 102 is specifically configured to reserve a time interval of a first duration before the sub-band transmission time to perform L BT channel listening;
the first communication interface 101 is specifically configured to: when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
In one embodiment, all time domain signals in one signal transmission period are distributed to a plurality of sub-bands on a frequency domain for transmission;
the first processor 102 is specifically configured to perform L BT channel sensing before each signal transmission time in the frequency domain, and reserve a second time duration between two adjacent signal transmission times for performing L BT channel sensing on a later-transmitted signal.
In an embodiment, the first communication interface 101 is further configured to perform at least one of the following operations:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
In an embodiment, the first communication interface 101 is further configured to:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
In an embodiment, the first communication interface 101 is further configured to transmit corresponding signals according to a signal index timing sequence specified by a communication protocol when the sub-band channel sensing is idle.
It should be noted that: the specific processing procedures of the first processor 102 and the first communication interface 101 are detailed in the method embodiment, and are not described herein again.
Of course, in practice, the various components in the network device 100 are coupled together by a bus system 104. It is understood that the bus system 104 is used to enable communications among the components. The bus system 104 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 104 in fig. 10.
The first memory 103 in the embodiment of the present invention is used to store various types of data to support the operation of the network device 100. Examples of such data include: any computer program for operating on network device 100.
The method disclosed in the above embodiments of the present invention may be applied to the first processor 102, or implemented by the first processor 102. The first processor 102 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the first processor 102. The first Processor 102 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. The first processor 102 may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the first memory 103, and the first processor 102 reads the information in the first memory 103 and completes the steps of the foregoing method in combination with its hardware.
In an exemplary embodiment, the network Device 100 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable logic devices (P L D, Programmable L) Complex Programmable logic devices (CP L D, Complex Programmable L) devices, Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.
Based on the hardware implementation of the program modules, and in order to implement the method on the terminal side according to the embodiment of the present invention, as shown in fig. 11, the terminal 110 includes:
the second communication interface 111 can perform information interaction with the network equipment;
and the second processor 112 is connected to the second communication interface 111 to implement information interaction with a network device, and is configured to execute the method provided by one or more technical solutions of the terminal side when running a computer program. And the computer program is stored on the second memory 113.
Specifically, the second processor 112 is configured to, through the second communication interface 111:
detecting the signal in the whole system bandwidth in a time domain detection window of the signal;
alternatively, the first and second electrodes may be,
in a time domain detection window of the signal, detecting the signal on a plurality of sub-bands corresponding to a frequency domain in a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
In an embodiment, the second processor 112 is specifically configured to:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
Of course, in practice, the various components in the terminal 110 are coupled together by a bus system 114. It will be appreciated that the bus system 114 is used to enable communications among the components. The bus system 114 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 114 in FIG. 11.
The second memory 113 in the embodiment of the present invention is used to store various types of data to support the operation of the terminal 110. Examples of such data include: any computer program for operating on terminal 110.
The method disclosed in the above embodiments of the present invention may be applied to the second processor 112, or implemented by the second processor 112. The second processor 112 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the second processor 112. The second processor 112 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The second processor 112 may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the second memory 113, and the second processor 112 reads the information in the second memory 113 and, in conjunction with its hardware, performs the steps of the foregoing method.
In an exemplary embodiment, the terminal 110 may be implemented by one or more ASICs, DSPs, P L D, CP L D, FPGA, general-purpose processors, controllers, MCUs, microprocessors, or other electronic components for performing the aforementioned methods.
The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic Random Access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM, Flash Memory), a Dynamic Random Access Memory (DRAM), which may be of any type suitable for Dynamic Access, including but not limited to Dynamic Random Access memories (SDRAM), Random Access memories (SDRAM, Random Access memories (SDRAM, Random Access memories) and Random Access memories (SDRAM, Random Access memories) which may be used as examples, Random Access memories (SDRAM, Random Access memories) and Random Access memories, Random Access memories (SDRAM, Random Access memories) which may be of any type suitable for example, Random Access memories suitable for example, Random Access memories (SDRAM, Random Access memories, Random.
In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a signal transmission system, as shown in fig. 12, where the signal transmission system includes:
the network device 121 is used for distributing a plurality of time domain signals of one signal transmission period to a plurality of frequency domain sub-bands for transmission, wherein the signals are SSB, L BT channel monitoring is carried out on the sub-bands before the signal transmission moment, and corresponding signals are transmitted at the transmission moment when the sub-band channel monitoring is idle;
and the terminal 122 is configured to detect the signal in a polling manner on the entire system bandwidth detection signal or on a plurality of corresponding subbands in the frequency domain within the time domain detection window of the signal.
It should be noted that: the specific processing procedures of the network device 121 and the terminal 122 have been described in detail above, and are not described herein again.
In an exemplary embodiment, the present invention further provides a storage medium, specifically a computer-readable storage medium, for example, a first memory 103 storing a computer program, where the computer program is executable by the first processor 102 of the network device 100 to perform the steps of the network device side method. For example, the second memory 113 may store a computer program, which may be executed by the second processor 112 of the terminal 110 to perform the steps of the terminal-side method. The computer readable storage medium may be memory such as FRAM, ROM, PROM, EPROM, EEPROM, FlashMemory, magnetic surface memory, optical disk, or CD-ROM.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In addition, the technical solutions described in the embodiments of the present invention may be arbitrarily combined without conflict.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (26)
1. A signal transmission method applied to a network device, the method comprising:
distributing a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission; the signal is a synchronous broadcast signal; wherein the content of the first and second substances,
and carrying out listen-before-talk L BT channel sensing on the sub-band before the signal transmission time, and transmitting a corresponding signal at the transmission time when the sub-band channel sensing is idle.
2. The method of claim 1, wherein the L BT channel listening on a subband comprises:
before the sub-band sending time, reserving a time interval of a first duration to carry out L BT channel monitoring;
when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
3. The method of claim 1, wherein all time domain signals within one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission;
l BT channel sensing is carried out before each signal transmission moment in the frequency domain, and a second time length is reserved between two adjacent signal transmission moments for carrying out L BT channel sensing on a signal transmitted later.
4. The method according to claim 1, wherein when the time domain signals of one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission, the method further comprises at least one of:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
5. The method of claim 1, wherein a sub-band is a fractional bandwidth BWP.
6. The method of claim 1, wherein when the time-domain signals of one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission, the method further comprises:
and when the sub-band channel is sensed to be idle, transmitting a corresponding signal according to the signal index sequence specified by the communication protocol.
7. The method of claim 1, wherein when the time-domain signals of one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission, the method further comprises:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
8. A signal transmission method, applied to a terminal, the method comprising:
detecting the signal in the whole system bandwidth in a time domain detection window of the signal;
alternatively, the first and second electrodes may be,
in a time domain detection window of the signal, detecting the signal on a plurality of sub-bands corresponding to a frequency domain in a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
9. The method of claim 8, wherein detecting signals in a round robin manner on a plurality of subbands corresponding to a frequency domain comprises:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
10. A signal transmission apparatus, comprising:
a transmission unit, configured to distribute a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission; the signal is a synchronous broadcast signal;
and the monitoring unit is used for carrying out L BT channel monitoring on the sub-band before the signal transmission time, and when the sub-band channel monitoring is idle, the transmission unit transmits a corresponding signal at the transmission time.
11. The apparatus of claim 10,
the monitoring unit is specifically used for reserving a time interval of a first duration before the sub-band sending time to carry out L BT channel monitoring;
the transmission unit is specifically configured to: when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
12. The apparatus of claim 10, wherein all time domain signals in one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission;
the monitoring unit is specifically used for carrying out L BT channel monitoring before each signal transmission time in a frequency domain, and reserving a second time length between two adjacent signal transmission times for carrying out L BT channel monitoring on a later-transmitted signal.
13. The apparatus of claim 10, wherein the transmission unit is further configured to perform at least one of the following operations:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
14. The apparatus of claim 10, wherein the transmission unit is further configured to:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
15. A signal transmission apparatus, comprising:
a determination unit;
a detection unit to:
detecting the signal in the whole system bandwidth in the time domain detection window of the signal determined by the determining unit;
alternatively, the first and second electrodes may be,
in the time domain detection window of the signal determined by the determining unit, detecting the signal on a plurality of sub-bands corresponding to the frequency domain by adopting a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
16. The apparatus according to claim 15, wherein the detection unit is specifically configured to:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
17. A network device, comprising: a first processor and a first communication interface; wherein the content of the first and second substances,
the first communication interface is used for distributing a plurality of signals in a time domain of one signal transmission period to a plurality of subbands in a frequency domain for transmission; the signal is a synchronous broadcast signal;
the first processor is configured to perform L BT channel sensing on a subband through the first communication interface before a signal transmission time, and when the subband channel sensing is idle, the first communication interface transmits a corresponding signal at the transmission time.
18. The network device of claim 17, wherein the first processor is specifically configured to reserve a time interval of a first duration for L BT channel listening before the sub-band transmission time;
the first communication interface is specifically configured to: when the subband channel is sensed as idle, one or more temporally continuous signals are transmitted at the transmission time of the subband.
19. The network device of claim 17, wherein all time domain signals in one signal transmission period are distributed to a plurality of subbands in a frequency domain for transmission;
the first processor is specifically used for carrying out L BT channel monitoring before each signal transmission time in a frequency domain, and reserving a second time length between two adjacent signal transmission times for carrying out L BT channel monitoring on a later-transmitted signal.
20. The network device of claim 17, wherein the first communication interface is further configured to at least one of:
distributing frequency domain resources of signals sent by sub-bands on two sides of a system bandwidth;
and distributing the frequency domain resources of the signals transmitted by the sub-bands in a distributed manner in the whole system bandwidth.
21. The network device of claim 17, wherein the first communication interface is further configured to:
when at least two sub-band channels are monitored to be idle, selecting one sub-band from the idle at least two sub-bands to send signals;
alternatively, the first and second electrodes may be,
and when at least two sub-band channels are sensed to be idle, simultaneously transmitting signals on the idle at least two sub-bands.
22. A terminal, comprising: a second processor and a second communication interface; wherein the content of the first and second substances,
the second processor is configured to, via a second communication interface:
detecting the signal in the whole system bandwidth in a time domain detection window of the signal;
alternatively, the first and second electrodes may be,
in a time domain detection window of the signal, detecting the signal on a plurality of sub-bands corresponding to a frequency domain in a polling mode; wherein the content of the first and second substances,
the signal is a synchronous broadcast signal.
23. The terminal of claim 22, wherein the second processor is specifically configured to:
and polling detection signals on a plurality of sub-bands corresponding to the frequency domain according to a set sequence in a time domain detection window of the signals.
24. A network device, comprising: a first processor and a first memory for storing a computer program capable of running on the processor,
wherein the first processor is adapted to perform the steps of the method of any one of claims 1 to 7 when running the computer program.
25. A terminal, comprising: a second processor and a second memory for storing a computer program capable of running on the processor,
wherein the second processor is adapted to perform the steps of the method of claim 8 or 9 when running the computer program.
26. A storage medium having stored thereon a computer program for performing the steps of the method of any one of claims 1 to 7, or for performing the steps of the method of claim 8 or 9, when the computer program is executed by a processor.
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