CN113260080B - Determination method, sending method and communication equipment for unauthorized frequency band channel occupation - Google Patents
Determination method, sending method and communication equipment for unauthorized frequency band channel occupation Download PDFInfo
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- CN113260080B CN113260080B CN202010087273.XA CN202010087273A CN113260080B CN 113260080 B CN113260080 B CN 113260080B CN 202010087273 A CN202010087273 A CN 202010087273A CN 113260080 B CN113260080 B CN 113260080B
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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
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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]
Abstract
The invention provides a method for determining channel occupation of an unlicensed frequency band, a method for transmitting the channel occupation of the unlicensed frequency band and communication equipment. The method for determining the occupation of the unauthorized frequency band channel comprises the following steps: under the condition that a first signal sent by second communication equipment is detected, determining that the second communication equipment occupies a channel; wherein the first signal is a signal that supports independent detection.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method for determining channel occupation of an unlicensed frequency band, a method for sending the channel occupation of the unlicensed frequency band and communication equipment.
Background
In future communication systems, unlicensed Band (Unlicensed Band) may be used as a supplement to Licensed Band (Licensed Band) to help operators expand their service capacity. When an initiating node needs to adopt an unauthorized frequency band to send information, listening Before speaking (Listen Before Talk, LBT) needs to be carried out first, power Detection (ED) is carried out on surrounding nodes, when the detected power is lower than a threshold, a channel is considered to be empty (Idle), and the initiating node can send the information; otherwise, the channel is considered to be busy, and the initiating node cannot transmit. After the initiating node starts sending, the usage right of a specified Channel in a certain period of Time within a Channel Occupancy Time (COT) may be granted to one or more associated responding nodes for transmission, and the responding nodes may share the COT of the initiating node for transmission only after detecting information sent by the initiating node.
At present, under the condition that an initiating node has no data transmission, the initiating node (initiating device) sends some signals so that a responding node (responding device) can share a COT, and according to an existing signal or channel, the time required by the responding node for detecting the signal or channel is long, so that resources in the detection time of the signal cannot be utilized, and further, the resource utilization rate is low.
Disclosure of Invention
The embodiment of the invention provides a method for determining channel occupation of an unlicensed frequency band, a method for sending the channel occupation of the unlicensed frequency band and communication equipment, and aims to solve the problem of low resource utilization rate caused by long signal or channel detection time in the prior art.
In order to solve the problems, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for determining an unlicensed frequency band channel occupancy, where the method is applied to a first communications device, and the method includes:
under the condition that a first signal sent by second communication equipment is detected, determining that the second communication equipment occupies a channel;
wherein the first signal is a signal that supports independent detection.
In a second aspect, an embodiment of the present invention provides a method for sending an unlicensed frequency band, where the method is applied to a second communications device, and the method includes:
under the condition that the second communication equipment detects that a channel is idle, sending a first signal to N pieces of first communication equipment;
wherein the first signal is a signal that supports independent detection.
In a third aspect, an embodiment of the present invention further provides a communication device, where the communication device is a first communication device, and the communication device includes:
the device comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining that a second communication device occupies a channel under the condition that a first signal sent by the second communication device is detected;
wherein the first signal is a signal supporting independent detection.
In a fourth aspect, an embodiment of the present invention further provides a communication device, where the communication device is a second communication device, and the second communication device includes:
a sending module, configured to send a first signal to N first communication devices when the second communication device detects that a channel is idle;
wherein the first signal is a signal that supports independent detection.
In a fifth aspect, an embodiment of the present invention further provides a communication device, where the communication device includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and when the computer program is executed by the processor, the method for determining an unlicensed frequency band channel occupation as described above is implemented, or the method for transmitting an unlicensed frequency band as described above is implemented.
In a sixth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the method for determining channel occupancy of an unlicensed frequency band, or the steps of the method for transmitting an unlicensed frequency band, as described above.
In the embodiment of the present invention, the first signal is a signal supporting independent detection, that is, other information may not be detected when detecting the first signal, so that the detection time of the first signal may be shortened, and the rate of detecting the first signal by the first communication device may be increased. In addition, in the embodiment of the present invention, for an unlicensed frequency band, when the first communication device detects the first signal sent by the second communication device, it may be determined that the second communication device occupies a channel, so that a channel utilization rate may be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic diagram of a network operation provided by an embodiment of the present invention;
fig. 2 is a flowchart of a method for determining channel occupancy in an unlicensed frequency band according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for transmitting an unlicensed frequency band according to an embodiment of the present invention;
FIG. 4 is a second schematic diagram illustrating the operation of the network according to the second embodiment of the present invention;
fig. 5 is one of the structural diagrams of a communication device provided by the embodiment of the present invention;
fig. 6 is a second block diagram of a communication device according to an embodiment of the present invention;
fig. 7 is a third block diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Further, as used herein, "and/or" means at least one of the connected objects, e.g., a and/or B and/or C, means 7 cases including a alone, B alone, C alone, and both a and B present, B and C present, a and C present, and a, B, and C present.
For convenience of understanding, some contents related to the embodiments of the present invention are explained below:
1. an unlicensed frequency band.
In future communication systems, an Unlicensed Band (Unlicensed Band) may be used as a supplement to a Licensed Band (Licensed Band) to help an operator to expand the capacity of services.
In order to keep consistent with New Radio (NR) deployment and maximize unlicensed access based on the New Radio (NR) as much as possible, the unlicensed frequency band may operate in a frequency band of 5 gigahertz (GHz), 37GHz, and 60 GHz. The large bandwidth (80 or 100 MHz) of the unlicensed band can reduce the implementation complexity of the base station and the UE. Since the unlicensed frequency band is shared by multiple Radio Access Technologies (RATs), such as Wireless Fidelity (WiFi), radar, long Term Evolution (LTE) Licensed-Assisted Access (LAA), etc., the unlicensed frequency band must comply with rules (regulations) when being used to ensure that all devices can fairly use the resource, such as Listen Before Talk (LBT), maximum Channel Occupancy Time (MCOT), etc. When a transmission node needs to send information, LBT needs to be carried out firstly, power Detection (ED) is carried out on surrounding nodes, when the detected power is lower than a threshold, a channel is considered to be empty (Idle), and the transmission node can send the information; otherwise, the channel is considered to be busy, and the transmitting node cannot transmit. The transmission node may be a base station, a User Equipment (UE), a WiFi Access Point (AP), or the like. After the transmission node starts to transmit, the channel occupation time COT cannot exceed the MCOT.
2. Network operation of Frame Based Equipment (FBE).
For FBE, transmission/reception adopts a periodic structure, and the Period is a Fixed Frame Period (FFP).
The FBE node adopts a LBT-based channel access mechanism to occupy the channel. A node that initiates a transmission sequence including one or more consecutive transmissions is referred to as an Initiating node (Initiating Device), and other nodes are referred to as Responding nodes (Responding devices). The FBE node may be an initiating node, a responding node, or both.
An example of the operation of the initiating node can be seen in fig. 1, whose operational requirements can include at least one of:
the value set of the FFP supported by the node is declared by the device manufacturer, and each value requirement is in the range of 1-10 milliseconds (ms). Transmission can only be initiated at the start of a certain FFP. A node may change its currently applied FFP, but its frequency cannot be higher than 200ms once.
Before starting a transmission at the start of a certain FFP, the initiating node will perform a Channel Clear Assessment (CCA). If the data is judged to be idle, the data can be sent immediately; otherwise, no transmission is allowed for the next FFP duration (except Short Control Signalling Transmissions, as specified by regulatory requirements). That is, the initiating node needs to do one-shot LBT, i.e., cat.2lbt, before transmitting.
Within a certain FFP that has started to transmit, a total duration COT can be defined for which the originating node can transmit without re-estimating the availability of the channel. The initiating node may transmit multiple times on the designated channel within the COT without performing an additional CCA, as long as the time interval between adjacent ones of these transmissions does not exceed 16 μ s. If the time interval between adjacent transmissions within the COT exceeds 16 mus, the initiating node needs to perform an additional CCA before continuing the transmission, and the transmission continues only if the CCA determines that the channel is clear. The time interval between all adjacent transmissions takes into account the COT duration.
The initiating node may grant usage rights for a specified channel for certain time periods within the COT to one or more associated responding nodes for transmission.
The COT cannot be longer than 95% of the FFP, and is followed by an Idle Period (IP) that lasts until the beginning of the next Fixed Frame Period ends, such that the length of the Idle Period is at least 5% of the FFP, and the minimum value is 100 microseconds (μ s).
After a response node correctly receives a data packet for it, it may transmit a management and control frame corresponding to the data packet on a designated channel directly and immediately without CCA, for example: an Acknowledgement (ACK) frame.
The node needs to ensure that these consecutively transmitted frames cannot exceed the above-mentioned maximum COT duration.
After receiving the authorization of the initiating node to use the designated channel for a certain period of time, the responding node may perform the following operations:
the responding node does not need to perform CCA before transmitting if it initiates a transmission after the initiating node indicates the end of the last transmission of the grant (up to 16 μ s apart); otherwise, executing CCA before the authorized transmission time interval begins, if the channel is busy, giving up the authorization, otherwise, starting transmission on the appointed channel, occupying the rest part of COT in the current FFP at most, starting multiple transmissions in the time range of the rest part, as long as the time interval of adjacent transmission does not exceed 16 mus, and giving up the authorization after the transmission is finished.
The method of the embodiment of the invention can be suitable for the unauthorized frequency band.
Referring to fig. 2, fig. 2 is a flowchart of a method for determining occupation of an unlicensed band channel according to an embodiment of the present invention. The method for determining the unlicensed band channel occupancy shown in fig. 2 can be applied to the first communication terminal.
As shown in fig. 2, the method for determining the unlicensed band channel occupancy may include the following steps:
In this embodiment, the communication device may send a first signal to another communication device when occupying an unlicensed frequency band channel; otherwise, the first signal is not transmitted to the other communication device. That is, the communication device will only transmit the first signal to the other device if the channel is occupied.
Therefore, in the case where the first communication device detects the first signal transmitted by the second communication device, it is described that the second communication device occupies the channel, so that the first communication device can determine that the second communication device occupies the channel.
In practical applications, the first communication device may detect the first signal on the time domain resource and the frequency domain resource configured by the second communication device.
In this embodiment, the first signal is a signal supporting independent detection. That is, the detection of the first signal may not be dependent on the detection of other information, which may not be detected when detecting the first signal. In this way, even if the first signal received by the first communication device is jointly transmitted with other information, the first communication device can directly detect the first signal after detecting the joint information, and does not detect other information except the first signal in the joint information, thereby improving the detection efficiency of the first signal.
In this embodiment, the second communication device is a communication device that occupies a channel, and the first communication device is a communication device that can establish a communication connection with the second communication device.
Optionally, the first communication device is a terminal. In this optional embodiment, the second communication device may be a network side device or a terminal.
Optionally, the second communication device is a network side device. In this optional embodiment, the first communication device may be a terminal, or may be a network side device.
In an embodiment where the first communication device is a terminal and the second communication device is a network side device, the first signal is a DownLink (DL) signal; in an embodiment where the first communication device is a network side device and the second communication device is a terminal, the first signal is an (UpLink, UL) signal.
In practical applications, the terminal may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable Device (wearable Device), or a vehicle-mounted Device. The network side device may be a base station, a relay, an access point, or the like.
In the method for determining the unauthorized frequency band channel occupancy according to this embodiment, the first signal is a signal supporting independent detection, that is, other information may not be detected when detecting the first signal, so that the rate of detecting the first signal by the first communication device may be increased. In addition, in this embodiment, for the unlicensed frequency band, the first communication device may determine that the second communication device occupies the channel when detecting the first signal sent by the second communication device, so that the utilization rate of the channel may be improved.
In this embodiment, the first signal detected by the first communication device may satisfy any one of the following conditions:
condition one, the first signal is not sent with the first object;
second, the first signal is sent with the first object;
wherein the first object comprises any one of: data, control channels.
In a first scenario where the first signal detected by the first communication device satisfies the first condition, the second communication device may send only the first signal without sending other information. That is, the first signal may be independently transmitted. Thus, on the one hand, signaling overhead can be reduced; on the other hand, even if the first object is not transmitted, the second device can transmit the first signal, so that the transmission frequency of the first signal can be increased, the probability that the first communication device detects the first signal is improved, and the utilization rate of a channel can be improved.
Because the first signal is a signal supporting independent detection and is independently sent, the first communication device can directly detect the first signal, so that the rate of detecting the first signal by the first communication device can be increased, and the utilization rate of a channel can be increased.
And in a second scene that the first signal detected by the first communication equipment meets the second condition, the second communication equipment jointly transmits the first signal and the first object.
Since the first signal is a signal supporting independent detection, even if the first signal and the first object are jointly transmitted, the first communication device may only detect the first signal and not detect the first object, so that the rate of detecting the first signal by the first communication device may be increased, and further, the utilization rate of a channel may be increased.
In practical application, after occupying a channel, the second communication device may integrate the first object and the first signal to transmit under the condition that the first object transmits, where the first signal satisfies the second condition; in the case where the first object is not transmitted, the first signal may be independently transmitted, and at this time, the first signal satisfies the above condition one. Therefore, after the second communication device occupies the channel, the first signal can be sent no matter whether the first object is sent or not, so that the sending frequency of the first signal can be increased, the probability that the first communication device detects the first signal is improved, and the utilization rate of the channel can be further improved.
In this embodiment, optionally, the first Signal is a Wideband (Wideband) Reference Signal (RS). Further, the wideband RS may be any one of: a wideband Demodulation Reference Signal (DMRS), and a wideband Tracking Reference Signal (TRS).
In this embodiment, optionally, the first signal is periodically transmitted by the second communication device, and a transmission period of the first signal is less than or equal to a fixed frame period FFP of the second communication device. Therefore, the first communication device has multiple chances to detect the first signal, and at least one chance to detect the first signal in one FFP of the second communication device exists, so that the probability of successfully detecting the first signal can be improved, and the utilization rate of a channel can be improved.
In this alternative embodiment, the first communication device and the second communication device may be the FBEs described above. Specifically, the first communication device may be the initiating node, and the second communication device may be the responding node.
Optionally, the time domain position sent by the first signal period may include at least a start position of an FFP of the second communication device. That is, the second communication device may transmit the first signal at least once at the start position of one FFP.
It should be understood, however, that this embodiment does not limit the time domain position transmitted by the first signal period, and in some embodiments, the time domain position transmitted by the first signal period may not include the starting position of the FFP of the second communication device.
In this embodiment, optionally, after determining that the second communication device occupies the channel, the method further includes at least one of:
sending first information to the second communication equipment within a channel occupation time COT;
and receiving second information sent by the second communication equipment in the COT.
As can be seen, after determining that the second communication device occupies the channel, the first communication device may share the Channel Occupancy Time (COT) and transmit information on the channel, so that the utilization rate of the channel may be improved.
After determining that the second communication device occupies the channel, the first communication device may receive the information sent by the second communication device on the channel, so that a receiving success rate of the information sent by the second communication device may be improved.
In this embodiment, optionally, the method further includes:
and prohibiting the transmission of first information to the second communication device within the COT when the first signal transmitted by the second communication device is not detected.
And under the condition that the first signal sent by the second communication device is not detected, indicating that the second communication device does not occupy the channel currently. Therefore, transmission of information to the second communication device may be prohibited within the COT. Additionally, optionally, the first communication device may also continue to detect the first signal or other information.
In this embodiment, optionally, the method further includes:
when the first signal is transmitted at the start position of the FFP of the second communication device, if the first communication device does not detect the first signal, no information is received in the FFP of the second communication device.
As can be seen from the foregoing, the second communication device may perform CCA before starting transmission at the starting position of a certain FFP, and if it is determined to be idle, may transmit at the FFP; otherwise no transmission is allowed within the FFP.
In this alternative embodiment, the second communication device is configured to transmit the first signal at a start position of the FFP. In this way, if the CCA result performed by the second communication device before the FFP is idle, the first signal is transmitted at the starting position of the FFP; otherwise, the first signal is not transmitted at the start position of the FFP.
As can be seen, in this optional embodiment, if the first communication device does not detect the first signal, it indicates that a CCA result performed by the second communication device before FFP is non-idle, and the second communication device does not send information at FFP. Therefore, the first communication device can give up receiving the information sent by the second communication device at the FFP of the second communication device, so as to reduce the operation load of the first communication device.
Referring to fig. 3, fig. 3 is a flowchart of a method for determining an unlicensed band channel occupancy according to an embodiment of the present invention. The method for transmitting the unlicensed frequency band can be applied to second communication equipment.
As shown in fig. 3, the method for transmitting an unlicensed frequency band may include the following steps:
In the method for transmitting an unlicensed frequency band according to this embodiment, the first signal is a signal supporting independent detection, that is, other information may not be detected when detecting the first signal, so that a rate of detecting the first signal by the first communication device may be increased. In addition, in this embodiment, for the unlicensed frequency band, the second communication device sends the first signal to the N first communication devices when detecting that the channel is idle, so that the first communication device can determine that the second communication device occupies the channel when detecting the first signal sent by the second communication device, thereby improving the utilization rate of the channel.
Optionally, the first signal is not transmitted with a first object, and the first object includes any one of the following items: data, control channels.
Optionally, the sending the first signal to the N first communication devices includes:
periodically transmitting a first signal to N pieces of first communication equipment;
wherein a transmission period of the first signal is less than or equal to the FFP of the second communication device.
Optionally, the time domain position sent by the first signal period at least includes a starting position of an FFP of the second communication device.
Optionally, in a case that N is greater than 1, the sending the first signal to the N first communication devices includes:
and transmitting the first signal to a first part of the N first communication devices through a first frequency domain resource, and transmitting the first signal to a second part of the N first communication devices through a second frequency domain resource.
In this optional embodiment, the second communication device may hop (Shift) frequency domain transmission resources of the first signal, and transmit the first signal to the N first communication devices through at least two incompletely overlapped frequency domain resources, so that the N first communication devices may receive the first signal through at least two incompletely overlapped frequency domain resources, thereby reducing reception interference of the N first communication devices, and further improving a success rate of the N first communication devices receiving the first signal.
Optionally, the first signal is a wideband RS.
Optionally, the wideband RS is any one of: wideband DMRS, wideband TRS.
Optionally, after the first signals are sent to the N first communication devices, the method further includes at least one of:
within the COT, receiving first information, wherein the first information is sent by a first communication device in the N first communication devices;
and sending second information to the N first communication devices in the COT.
Optionally, the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
It should be noted that, this embodiment is used as an embodiment of the second communication device corresponding to the above method embodiment, in this embodiment, only different parts from the method embodiment in fig. 2 are explained, and for description of the same parts, reference is made to the description of the method embodiment in fig. 2, which is not repeated herein.
Various optional embodiments described in the embodiments of the present invention may be implemented in combination with each other or separately, and the embodiments of the present invention are not limited thereto.
For convenience of understanding, the first communication device is a UE, the second communication device is a base station, and the first Signal is a DL Signal (DL Signal).
The base station may transmit a DL signal while occupying the channel.
The DL signal may satisfy at least one of:
the DL signal may be Wideband RS;
the DL signal may not be transmitted with the data or control channel;
the DL signal may start to be transmitted at a start position of each FFP;
the DL signal may be transmitted periodically, which may be equal to or less than FFP;
if the DL signal is a Wideband DMRS, subsequent detection of DCI may be performed after the signal is detected.
Example one
The base station transmits a Wideband RS, which may be a Wideband DMRS, TRS, etc. And the FBE UE performs corresponding signal detection at the configured position. If the UE detects a corresponding signal, it indicates that the base station occupies the channel, and the UE may perform uplink transmission in the channel. If the UE does not detect the corresponding signal, it indicates that the base station fails to occupy the channel, and the UE may stop other information detection. For example, the RS is a Wideband DMRS of the PDCCH, and if the UE does not detect the DMRS, the UE does not need to monitor a Control Resource Set (CORESET). The Wideband DMRS may be transmitted separately.
Example two
The DL Signal may be sent periodically, which may be less than or equal to FFP. DL Signal may be sent at the start of each FFP, e.g. the start of FFP1 and FFP2 in fig. 4.
When the period of the DL Signal is less than FFP, the DL Signal may also be transmitted within FFP, as in the second DL Signal within FFP2 in fig. 4. The advantage of the DL Signal period being smaller than the FFP is that for a UE receiving Discontinuous Reception (DRX), there may be other opportunities for the UE to detect the DL Signal when the UE enters DRX ON after the DL Signal at the start position of the FFP is transmitted. For example, UE2 in fig. 4 misses the DL Signal at the start position of FFP2, and may detect the DL Signal at another position in FFP2 and then perform uplink transmission.
EXAMPLE III
The position of DL Signal in the frequency domain may be shifted by the base station. When DL Signal is the Wideband DMRS of PDCCH, the position of Shift CORESET in frequency domain is used to make the Wideband DMRS in frequency domain Shift, thereby reducing the receiving interference of UE end.
In the above embodiment, the base station transmits DL Signal within the FFP, and the transmission position includes at least the start position of the FFP; DL Signal can be Wideband RS, and the sending period can be less than or equal to FFP; if the Wideband RS is the Wideband DMRS of the PDCCH, the FBE UE must detect the Wideband DMRS, but may not detect CORESET; the position of the DL Signal in the frequency domain may shift.
Through the embodiment, the FBE UE can quickly detect whether the base station occupies the channel or not, so as to determine whether to share the COT of the base station or not.
Referring to fig. 5, fig. 5 is a block diagram of a communication device according to an embodiment of the present invention. The communication device 500 shown in fig. 5 is a first communication device of an embodiment of the present invention. As shown in fig. 5, the communication device 500 includes:
a determining module 500, configured to determine that a second communication device occupies a channel when a first signal sent by the second communication device is detected;
wherein the first signal is a signal that supports independent detection.
Optionally, the first signal is not transmitted with a first object, and the first object includes any one of the following items: data, control channels.
Optionally, the first signal is periodically transmitted by the second communication device, and a transmission period of the first signal is less than or equal to a fixed frame period FFP of the second communication device.
Optionally, the time domain position sent by the first signal period at least includes a starting position of an FFP of the second communication device.
Optionally, the first signal is a wideband reference signal RS.
Optionally, the wideband RS is any one of the following: a broadband demodulation reference signal DMRS and a broadband tracking reference signal TRS.
Optionally, the communication device 500 further comprises at least one of:
a first sending module, configured to send first information to the second communications device within a channel occupancy time COT;
and the first receiving module is configured to receive, in the COT, the second information sent by the second communication device.
Optionally, the communication device 500 further includes:
a prohibition module, configured to prohibit, in the COT, sending of the first information to the second communication device when the first signal sent by the second communication device is not detected.
Optionally, the communication device 500 further includes:
a discarding module, configured to, when the first signal is sent at a start position of an FFP of the second communication device, if the first communication device does not detect the first signal, not receive information in the FFP of the second communication device.
Optionally, the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
The communication device 500 can implement each process that can be implemented by the first communication device in the method embodiment of the present invention, and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
Referring to fig. 6, fig. 6 is a second structural diagram of a communication device according to an embodiment of the present invention. The communication device 600 shown in fig. 6 is a second communication device according to an embodiment of the present invention. As shown in fig. 6, the communication device 600 includes:
a second sending module 601, configured to send a first signal to N first communication devices when the second communication device detects that a channel is idle;
wherein the first signal is a signal that supports independent detection.
Optionally, the first signal is not transmitted with a first object, and the first object includes any one of the following items: data, control channels.
Optionally, the sending module 601 is specifically configured to:
periodically sending a first signal to N pieces of first communication equipment;
wherein a transmission cycle of the first signal is less than or equal to an FFP of the second communication device.
Optionally, the time domain position sent by the first signal period at least includes a starting position of an FFP of the second communication device.
Optionally, when N is greater than 1, the sending module 601 is specifically configured to:
and transmitting the first signal to a first part of the N first communication devices through a first frequency domain resource, and transmitting the first signal to a second part of the N first communication devices through a second frequency domain resource.
Optionally, the first signal is a wideband RS.
Optionally, the wideband RS is any one of: wideband DMRS, wideband TRS.
Optionally, the communication device 600 further comprises at least one of:
a second receiving module, configured to receive first information in the COT, where the first information is sent by a first communications device in the N first communications devices;
and a third sending module, configured to send second information to the N first communication devices in the COT.
Optionally, the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
The communication device 600 can implement each process that can be implemented by the second communication device in the method embodiment of the present invention, and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
Referring to fig. 7, fig. 7 is a third structural diagram of a communication device according to an embodiment of the present invention. As shown in fig. 7, the communication device 700 includes: a processor 701, a memory 702, a user interface 703, a transceiver 704, and a bus interface.
In this embodiment of the present invention, the communication device 700 further includes: a computer program stored on the memory 702 and executable on the processor 701.
The communication device 700 may be the first communication device or the second communication device of an embodiment of the present invention.
Scenario one of the first communication apparatus according to the embodiment of the present invention is a communication apparatus 700.
The computer program when executed by the processor 701 implements the steps of:
under the condition that a first signal sent by second communication equipment is detected, determining that the second communication equipment occupies a channel;
wherein the first signal is a signal supporting independent detection.
Optionally, the first signal is not transmitted with a first object, and the first object includes any one of the following items: data, control channels.
Optionally, the first signal is periodically transmitted by the second communication device, and a transmission period of the first signal is less than or equal to a fixed frame period FFP of the second communication device.
Optionally, the time domain position sent by the first signal period at least includes a starting position of an FFP of the second communication device.
Optionally, the first signal is a wideband reference signal RS.
Optionally, the wideband RS is any one of: a broadband demodulation reference signal DMRS and a broadband tracking reference signal TRS.
Optionally, the computer program when executed by the processor 701 implements at least one of the following steps:
transmitting first information to the second communication device through the transceiver 704 within the channel occupancy time COT;
within the COT, the second information sent by the second communication device is received by transceiver 704.
Optionally, the computer program when executed by the processor 701 implements at least one of the following steps:
and prohibiting the transmission of first information to the second communication device within the COT when the first signal transmitted by the second communication device is not detected.
Optionally, when executed by the processor 701, the computer program may further specifically implement the following steps:
and when the first signal is transmitted at the starting position of the FFP of the second communication equipment, if the first communication equipment does not detect the first signal, no information is received in the FFP of the second communication equipment.
Optionally, the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
For scenario one, the communication device 700 may implement each process implemented by the first communication device in the foregoing method embodiments, and details are not repeated here to avoid repetition.
Scenario two, in which the communication device 700 is a second communication device according to the embodiment of the present invention.
Under the condition that the second communication equipment detects that a channel is idle, sending a first signal to N pieces of first communication equipment;
wherein the first signal is a signal that supports independent detection.
Optionally, the first signal is not transmitted with a first object, and the first object includes any one of the following items: data, control channels.
Optionally, when executed by the processor 701, the computer program may specifically implement the following steps:
periodically sending a first signal to N pieces of first communication equipment;
wherein a transmission period of the first signal is less than or equal to the FFP of the second communication device.
Optionally, the time domain position sent by the first signal period at least includes a starting position of an FFP of the second communication device.
Optionally, when N is greater than 1, the following steps may be specifically implemented when the computer program is executed by the processor 701:
and transmitting the first signal to a first part of the N first communication devices through a first frequency domain resource, and transmitting the first signal to a second part of the N first communication devices through a second frequency domain resource.
Optionally, the first signal is a wideband RS.
Optionally, the wideband RS is any one of: wideband DMRS, wideband TRS.
Optionally, when executed by the processor 701, the computer program may further specifically implement at least one of the following steps:
receiving, by the transceiver 704, first information within the COT, the first information being transmitted by a first communication device of the N first communication devices;
within the COT, second information is transmitted to the N first communication devices via transceiver 704.
Optionally, the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
For scenario two, the communication device 700 can implement each process implemented by the second communication device in the above method embodiments, and details are not repeated here to avoid repetition.
In FIG. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 702, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 704 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 703 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 may store data used by the processor 2601 in performing operations.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements each process of the foregoing method for determining an unauthorized frequency band channel occupancy or the foregoing method for sending an unauthorized frequency band, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (21)
1. A method for determining channel occupation of an unlicensed frequency band, applied to a first communication device, the method comprising:
under the condition that a first signal sent by second communication equipment is detected, determining that the second communication equipment occupies a channel;
wherein the first signal is a signal supporting independent detection;
after the determining that the second communication device occupies the channel, the method further comprises at least one of:
sending first information to a second communication device within a shared channel occupation time COT of the second communication device;
and receiving second information sent by the second communication equipment in the COT of the shared second communication equipment.
2. The method of claim 1, wherein the first signal is not transmitted with a first object, the first object comprising any of: data, control channels.
3. The method of claim 1, wherein the first signal is transmitted periodically by the second communication device, and wherein the transmission period of the first signal is less than or equal to a Fixed Frame Period (FFP) of the second communication device.
4. The method of claim 3, wherein the time domain position of the first signal period transmission comprises at least a starting position of one FFP of the second communication device.
5. The method according to any of claims 1 to 4, characterized in that the first signal is a wideband reference signal, RS.
6. The method of claim 5, wherein the wideband RS is any one of: a broadband demodulation reference signal DMRS and a broadband tracking reference signal TRS.
7. The method of claim 1, further comprising:
and when the first signal transmitted by the second communication equipment is not detected, prohibiting transmitting first information to the second communication equipment in the COT.
8. The method of claim 1, further comprising:
and when the first signal is transmitted at the starting position of the FFP of the second communication equipment, if the first communication equipment does not detect the first signal, no information is received in the FFP of the second communication equipment.
9. The method according to claim 1, wherein the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
10. A method for sending an unlicensed frequency band is applied to a second communication device, and is characterized in that the method comprises the following steps:
under the condition that the second communication equipment detects that a channel is idle, sending a first signal to N pieces of first communication equipment;
wherein the first signal is a signal supporting independent detection;
after the transmitting the first signals to the N first communication devices, the method further comprises at least one of:
receiving first information in a COT of a shared second communication device, wherein the first information is sent by a first communication device in the N first communication devices;
and sending second information to the N first communication devices in the COT of the shared second communication device.
11. The method of claim 10, wherein the first signal is not transmitted with a first object, the first object comprising any of: data, control channels.
12. The method of claim 10, wherein said transmitting the first signal to the N first communication devices comprises:
periodically sending a first signal to N pieces of first communication equipment;
wherein a transmission period of the first signal is less than or equal to the FFP of the second communication device.
13. The method of claim 12, wherein the time domain position transmitted by the first signal period comprises at least a starting position of an FFP of the second communication device.
14. The method of claim 10, wherein in case N is greater than 1, said transmitting the first signal to N first communication devices comprises:
and transmitting the first signal to a first part of the N first communication devices through a first frequency domain resource, and transmitting the first signal to a second part of the N first communication devices through a second frequency domain resource.
15. The method according to any one of claims 10 to 14, wherein the first signal is a wideband RS.
16. The method of claim 15, wherein the wideband RS is any one of: wideband DMRS, wideband TRS.
17. The method according to claim 10, wherein the first communication device is a terminal, and the second communication device is a network side device; or, the first communication device is a network side device, and the second communication device is a terminal.
18. A communication device, wherein the communication device is a first communication device, the communication device comprising:
the device comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining that a second communication device occupies a channel under the condition that a first signal sent by the second communication device is detected;
wherein the first signal is a signal that supports independent detection;
the communication device further comprises at least one of:
a first sending module, configured to send first information to a second communication device within a shared channel occupancy time COT of the second communication device;
a first receiving module, configured to receive, in a COT of a shared second communications device, second information sent by the second communications device.
19. A communication device, wherein the communication device is a second communication device, wherein the second communication device comprises:
a sending module, configured to send a first signal to N first communication devices when the second communication device detects that a channel is idle;
wherein the first signal is a signal supporting independent detection;
the communication device further comprises at least one of:
a second receiving module, configured to receive first information in a COT of a shared second communications device, where the first information is sent by a first communications device of the N first communications devices;
a third sending module, configured to send second information to the N first communications devices in the COT of the shared second communications device.
20. A communications device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the method for determining unlicensed band channel occupancy as claimed in any one of claims 1 to 9 or the steps of the method for transmitting unlicensed bands as claimed in any one of claims 10 to 17.
21. A computer-readable storage medium, having a computer program stored thereon, wherein the computer program, when being executed by a processor, implements the steps of the method for determining unlicensed band channel occupancy according to any one of claims 1 to 9 or the steps of the method for transmitting unlicensed band according to any one of claims 10 to 17.
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| CN202010087273.XA CN113260080B (en) | 2020-02-11 | 2020-02-11 | Determination method, sending method and communication equipment for unauthorized frequency band channel occupation |
| PCT/CN2021/075234 WO2021160017A1 (en) | 2020-02-11 | 2021-02-04 | Determination method and sending method for occupancy of unlicensed band channel, and communication device |
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| CN202010087273.XA CN113260080B (en) | 2020-02-11 | 2020-02-11 | Determination method, sending method and communication equipment for unauthorized frequency band channel occupation |
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| JP2019169958A (en) * | 2019-05-07 | 2019-10-03 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Method and device for transmitting reference signal in cell using unlicensed frequency band |
| CN110740027A (en) * | 2014-12-31 | 2020-01-31 | 华为技术有限公司 | Method and device for transmitting reference signal in cell using unlicensed frequency band |
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| CN105611552A (en) * | 2015-06-30 | 2016-05-25 | 宇龙计算机通信科技(深圳)有限公司 | Service detection method, service detection system, terminal and base station |
| CN106992804A (en) * | 2016-01-20 | 2017-07-28 | 中兴通讯股份有限公司 | The sending method and device of a kind of detection reference signal |
| US11956817B2 (en) * | 2018-11-29 | 2024-04-09 | Beijing Xiaomi Mobile Software Co., Ltd. | Communication method, apparatus and system in unlicensed spectrums |
| US20220256597A1 (en) * | 2019-06-28 | 2022-08-11 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and apparatus for determining starting position of channel occupancy time |
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|---|---|---|---|---|
| CN110740027A (en) * | 2014-12-31 | 2020-01-31 | 华为技术有限公司 | Method and device for transmitting reference signal in cell using unlicensed frequency band |
| JP2019169958A (en) * | 2019-05-07 | 2019-10-03 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Method and device for transmitting reference signal in cell using unlicensed frequency band |
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