CN111600691B

CN111600691B - Method and device for transmitting sounding reference signal of unlicensed frequency band

Info

Publication number: CN111600691B
Application number: CN201910488258.3A
Authority: CN
Inventors: 姜蕾; 孙晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2022-04-15
Anticipated expiration: 2039-06-05
Also published as: WO2020244433A1; CN111600691A

Abstract

The invention discloses a method and a device for transmitting a sounding reference signal of an unauthorized frequency band, wherein the method comprises the following steps: the method comprises the steps of transmitting a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI), and receiving the SRS transmitted by user equipment, wherein the SRS is transmitted by the user equipment according to the first starting position. According to the method and the device for transmitting the sounding reference signal of the unlicensed frequency band, the SRS with any symbol length can be flexibly transmitted under the condition that the number of sounding reference signal resource groups does not need to be increased.

Description

Method and device for transmitting sounding reference signal of unlicensed frequency band

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting sounding reference signals in an unlicensed frequency band.

Background

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 the deployment in a New Radio (NR) system consistent and maximize the unlicensed access based on the NR system as much as possible, the unlicensed frequency band may operate in 5GHz, 37GHz, and 60GHz bands. The large bandwidth (80MHz or 100MHz) of the unlicensed band can reduce implementation complexity of a base station and a terminal (UE), but since the unlicensed band is shared by multiple Radio Access Technologies (RATs), such as WiFi, radar, Long Term Evolution licensed Assisted Access (LTE-LAA), the unlicensed band must meet certain rules when being used to ensure that all devices can fairly use the resource, such as Listen Before Talk (LBT), Maximum Channel Occupancy Time (MCOT), and other rules.

Before a base station (gNB) or a UE starts transmission in an unlicensed band, LBT needs to be performed in advance, and LBT end time is uncertain, so a time when a channel is detected to be empty and an actual transmission start time are generally inconsistent, a gap (gap) exists between the time and the actual transmission start time, and a sounding reference signal (trigger SRS) may be triggered non-periodically in the gap, so that the UE sends an SRS before sending data or controlling to fully utilize resources, for example, the gNB may utilize the SRS to perform measurement.

Although the unlicensed band already supports the configuration of the start position (startPosition) in the resource mapping (resourcemaping) to any one of (0, 13), it is still not possible to flexibly transmit an SRS of any symbol length. Even if a plurality of groups of SRS resources (resource sets) are configured such that the SRS resources (resource) in each group (set) are of different lengths, an SRS of one length may correspond to a plurality of different starting positions, resulting in a drastic increase in the number of SRS resource sets that need to be configured.

Disclosure of Invention

The embodiments of the present invention provide a method and a device for transmitting sounding reference signals in an unlicensed frequency band, which can flexibly transmit an SRS with any symbol length without increasing the number of sounding reference signal resource groups.

In a first aspect, a method for transmitting sounding reference signals in an unlicensed frequency band is provided, and is applied to a network device, and the method includes: sending a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI); receiving the SRS sent by user equipment, wherein the SRS is sent by the user equipment according to the first starting position.

In a second aspect, a method for transmitting sounding reference signals in an unlicensed frequency band is provided, and is applied to a network device, and the method includes: transmitting an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated or not; receiving, from a user equipment, a sounding reference signal, SRS, on the activated SRS resource.

In a third aspect, a method for transmitting sounding reference signals in an unlicensed frequency band is provided, and is applied to a user equipment, and includes: receiving a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI); and transmitting the SRS according to the first starting position.

In a fourth aspect, a method for transmitting sounding reference signals in an unlicensed frequency band is provided, and is applied to a user equipment, and includes: receiving an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated or not; and transmitting Sounding Reference Signals (SRS) on the activated SRS resources.

In a fifth aspect, a network device is provided, which includes: a first sending module, configured to send a first starting position of a Sounding Reference Signal (SRS), where the first starting position of the SRS is carried in Downlink Control Information (DCI); a first receiving module, configured to receive the SRS sent by a user equipment, where the SRS is sent by the user equipment according to the first starting position.

In a sixth aspect, a network device is provided, comprising: a second sending module, configured to send an activation indication, where the activation indication is used to indicate whether sounding reference signal SRS resources in a sounding reference signal SRS resource group are activated; a second receiving module, configured to receive, from a user equipment, a sounding reference signal, SRS, on the activated SRS resource.

In a seventh aspect, a user equipment is provided, including: a third receiving module, configured to receive a first starting position of a Sounding Reference Signal (SRS), where the first starting position of the SRS is carried in Downlink Control Information (DCI); and a third sending module, configured to send the SRS according to the first starting position.

In an eighth aspect, a user equipment is provided, comprising: a fourth receiving module, configured to receive an activation indication, where the activation indication is used to indicate whether a sounding reference signal SRS resource in a sounding reference signal SRS resource group is activated; a fourth sending module, configured to send a sounding reference signal SRS on the activated SRS resource.

In a ninth aspect, there is provided a network device, comprising: a memory, a processor 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 of the first or second aspect above.

In a tenth aspect, there is provided a user equipment comprising: a memory, a processor 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 of the third or fourth aspect above.

In an eleventh aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the first or second aspect above.

In a twelfth aspect, a computer-readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the third or fourth aspect above.

In the embodiment of the present invention, an SRS transmitted by a user equipment is received by transmitting a first starting position of a sounding reference signal, SRS, where the first starting position of the SRS is carried in downlink control information, DCI, and the SRS is transmitted by the user equipment according to the first starting position, so that the SRS with any symbol length can be flexibly transmitted without increasing the number of sounding reference signal resource groups.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application;

fig. 2a and 2b show schematic diagrams of transmitting SRS;

fig. 3 is a schematic flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application;

fig. 4 is a schematic flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application;

fig. 5 is a schematic flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application;

fig. 6 is a schematic flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 9 shows a schematic structural diagram of a user equipment provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present application;

FIG. 11 is a block diagram of a user device of another embodiment of the present invention;

fig. 12 is a block diagram of a network device to which an embodiment of the present invention is applied.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention can be applied to various communication systems, such as: global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE)/enhanced Long Term Evolution (LTE-a), NR, and the like.

UEs, also referred to as Mobile terminals (Mobile terminals), Mobile User Equipment (UEs), etc., may communicate with one or more core networks via a Radio Access Network (RAN), and the user equipment may be Mobile terminals, such as Mobile phones (or "cellular" phones) and computers with Mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted Mobile devices, that exchange language and/or data with the Radio Access Network.

The Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) in LTE, or a 5G Base Station (gNB), but the present invention is not limited thereto, and for convenience of description, the following embodiments take the gNB as an example for description.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application, where the method may be performed by a network device and a user equipment. In other words, the method may be performed by software or hardware installed on the network device and the user device. As shown, the method may include the following steps.

S111: the network device transmits a first starting position of a sounding reference signal, SRS.

Wherein the first start position (startPosition) of the SRS is carried in Downlink Control Information (DCI). For example, a field (field) may be added to the DCI to dynamically indicate the start position of the SRS transmission, i.e., the first start position.

Specifically, when the unlicensed frequency band is used, rules, such as LBT, maximum channel occupation time MCOT, and the like, must be met, when a transmission node needs to send information, it needs to perform LBT first, power detection (ED) is performed on surrounding nodes, and when the detected power is lower than a threshold, it is considered that a channel is empty (idle), and the transmission node may 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 UE, a WiFi AP, etc. After the transmission node starts transmission, the Channel Occupancy Time (COT) cannot exceed the MCOT.

The types of LBTs (categories) commonly used may be classified as category1, category2 and category 4. Category1LBT is LBT not done by the sending node, i.e. no LBT or immediate transmission. The Category2LBT is one-shot LBT, that is, the node performs one LBT before transmission, and transmits if the channel is empty, and does not transmit if the channel is busy. The Category4LBT is a back-off (back-off) based channel sensing mechanism, and when a transmission node senses that a channel is busy, the node performs back-off and continues sensing until the channel is sensed to be empty. For the gNB, category4LBT is applied to PDSCH/DCI/eDCI. For the UE, category4LBT corresponds to type1 uplink channel access procedure (UL channel access procedure), and category2LBT corresponds to type2UL channel access procedure. In addition, a category2LBT is newly added in the new air interface unlicensed frequency band NR-U, and corresponds to a gap of 16 us. The SRS may be trigger in the gap aperiodically, so that the UE transmits the SRS before transmitting data or control to fully utilize resources, and the network device may transmit the first start position of the SRS in this step.

S121: the UE receives a first starting position of a sounding reference signal, SRS.

Wherein the first starting position of the SRS is carried in the DCI. In the NR Rel-15 specification, the starting position of SRS resource may be (0 … 5), in NR-U the range is extended to (0 … 13).

S122: and the UE transmits the SRS according to the first starting position.

Fig. 2a shows a schematic diagram of SRS transmission, and as shown, the starting position depends on the gNB scheduling, the time when the UE senses that the channel is empty, and so on. For example, in a time period (gNB initiated COT) when a base station starts to occupy a Channel, after a Physical Downlink Shared Channel (PDSCH) is transmitted, the gNB needs to feed back the PDSCH by the UE, after the last Downlink data transmission is completed, the UE needs to process the PDSCH and then prepare acknowledgement information/negative acknowledgement (ACK/NACK), and during this time period, the UE may send an SRS. The SRS transmission time may be specified in the DCI by the gNB in step S111. And the UE transmits the SRS according to the first starting position specified in the DCI.

Fig. 2b shows a schematic diagram of sending SRS, and as shown in the figure, for uplink transmission, when the UE uses category4LBT to sense that the channel is empty and there is no uplink transmission starting position, the UE may send SRS. At this time, the SRS transmission start position is unknown by the gNB, so the gNB indicates SRS startPosition in the DCI, and the UE can start transmission only at startPosition or any position after the startPosition. The UE may defer or send a predetermined signal (reservation signal) before sensing that the channel is empty and the SRS transmission.

Thus, in NR-U, for example, SRS can be transmitted starting from an arbitrary symbol (symbol) within a slot (slot). The gap length between the UE sensing that the channel is empty and the actual uplink transmission starts may be any value less than 14OS lengths. NR-U supports configuring startPosition in resource mapping (resourceMapping) as any one of (0, 13), and may configure multiple SRS resource sets, so that SRS resource in each set is of different lengths, for example, configuring 13 SRS resource sets with lengths of 1-13, and by this step, the start position of SRS can be dynamically set, and flexible transmission of SRS with any symbol length in 1-13 is realized.

S112: and the network equipment receives the SRS sent by the user equipment.

Wherein the SRS is transmitted by the user equipment according to the first starting position.

Therefore, according to the transmission method of the sounding reference signal in the unlicensed frequency band provided by the embodiment of the present application, a first starting position of an SRS is transmitted, where the first starting position of the SRS is carried in downlink control information DCI, and the SRS transmitted by a user equipment is received, where the SRS is transmitted by the user equipment according to the first starting position, and can dynamically indicate the starting position of the SRS, and the SRS with an arbitrary symbol length is flexibly transmitted without increasing the number of sounding reference signal resource groups.

In a possible implementation manner, before the network device transmits the first start position of the SRS, radio resource control RRC signaling may have been transmitted to the UE, and in the embodiment of the present invention, if a predetermined parameter value, for example, a usage parameter, of an aperiodic sounding reference signal SRS resource group indicates that the SRS is transmitted in an unlicensed frequency band, for example, NR-U or unlicensed band, the second start position of the SRS is not configured in the RRC signaling.

In another possible implementation manner, before the network device transmits the first start position of the SRS, radio resource control, RRC, signaling may have been transmitted to the UE, and if the RRC signaling has configured the second start position of the SRS, in an embodiment of the present invention, if a predetermined parameter value of the aperiodic sounding reference signal, SRS resource group, for example, a usage parameter, indicates that the SRS is transmitted in an unlicensed frequency band, for example, NR-U or unlicensed band, the UE does not execute the second start position of the SRS configured in the RRC signaling, but executes the first start position carried in the embodiment of the present invention and DCI, that is, the UE transmits the SRS at or after the first start position.

Fig. 3 is another flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application, where the method may be performed by a network device and a user equipment. In other words, the method may be performed by software or hardware installed on the network device and the user device. As shown, the method may include the following steps.

S311: the network device transmits a first starting position of a sounding reference signal, SRS.

Wherein the first start position (startPosition) of the SRS is carried in Downlink Control Information (DCI). For example, a field may be added to the DCI to dynamically indicate the start position of the SRS transmission, i.e., the first start position.

S321: the UE receives a first starting position of a sounding reference signal, SRS.

Wherein the first starting position of the SRS is carried in the DCI.

S312: the network device sends an activation indication.

In some implementations, the gNB may configure one or more SRS resource sets, within each of which there may be one or more SRS resources, to the UE through RRC signaling SRS-resource set. Each SRS resource may map to 1, 2 or 4 symbols. The corresponding use of SRS resource set is indicated by a use parameter in SRS-ResourceSet. When the higher layer parameter use is set to 'beamManagement', only one SRS resource can be transmitted per SRS resource set at the same time.

The SRS can be periodic (periodic), semi-persistent (semi-persistent), or aperiodic (aperiodic). For aperiodic SRS, the gNB may activate at least one aperiodic SRS resource set through an SRS request field in the DCI. Wherein the aperiodic SRS-ResourceTrigger value of each SRS resource set is associated with the value of the SRS request. All SRS resources in the activated SRS resource set are activated simultaneously, while this existing step in this embodiment corresponds to a kind of pre-activation.

On this basis, the activation indication sent in this step is used to indicate whether the sounding reference signal SRS resources in the SRS resource group are activated.

In one implementation, the starting position of the first activated SRS resource is the first starting position of the SRS, the starting position of the second activated SRS resource depends on the ending position of the first activated SRS resource, and so on, and the starting position of the next activated SRS resource depends on the ending position of the last activated SRS resource. For example, if the 1 st SRS resource ends at symbol 7, the 2 nd SRS resource starts at symbol 8.

In one implementation, the activation indication includes a bitmap (bitmap), where a bit in the bitmap corresponds to an SRS resource in the SRS resource group, where SRS resources of multiple lengths are configured in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated, for example, a value of 1 may indicate that the SRS resource is activated, and a value of 0 may indicate that the SRS resource is not activated.

In one implementation, the size of the field in the DCI is fixed, but the number of SRS resources in the SRS resource set may be different, so the number of bits of bitmap may depend on the SRS resource number value with the largest number of SRS resources in the SRS resource set. When the number of resources in the indicated SRS resource set is smaller than the value of the number, the redundant bits are set to inactive, for example, to be 0.

For example, if the maximum number of SRS resources in an SRS resource set is 4, then bitmap is 4 bits, and SRS resources in the indicated SRS resource set are 1OS, 2OS and 4OS, respectively, then bitmap indication 1110 in DCI indicates that all SRS resources in the SRS resource set are activated, and redundant 1 bit indicates 0.

In another implementation manner, the size of the field in the DCI is fixed, and under the condition that the number of SRS resources in the SRS resource set is the same, the number of bits of the bitmap depends on the number of SRS resources in the SRS resource set, that is, the bits in the bitmap correspond to the SRS resources in the SRS resource group one by one.

The present embodiment differs from the NR Rel-15 specification in that the activation does not activate all SRS resources in SRS resource set, but selectively activates one or more of them. Multiple SRS resources with the same or different lengths can be configured in one SRS resource group, and the SRS with different lengths can be obtained by selectively activating one or more of the SRS resources.

In one implementation, the activation indication is carried in DCI. In an implementation manner, the bitmap may be a newly added bitmap, or may be obtained by expanding other fields of the DCI.

S322: the UE receives an activation indication.

It should be noted that, although the embodiment of the present invention is described by taking an example in which the network device transmits the activation instruction after transmitting the first start position of the SRS, the embodiment of the present invention does not limit the execution order of the first start position of the SRS transmission and the activation instruction transmission by the network device, that is, the network device may transmit the activation instruction after transmitting the first start position of the SRS, may transmit the activation instruction before transmitting the first start position of the SRS, or may transmit both simultaneously, for example, both are carried in DCI, and transmit the first start position and the activation instruction simultaneously when transmitting the DCI.

Similarly, the first starting position at which the UE receives the SRS and the execution sequence of receiving the activation instruction are not limited in the embodiment of the present invention, that is, the first starting position at which the UE receives the SRS may be executed before receiving the activation instruction, or may be executed after receiving the activation instruction, or both of them may be received simultaneously, for example, both of them are carried in the DCI simultaneously, and the first starting position and the activation instruction are received simultaneously when receiving the DCI.

S323: and the UE transmits the SRS on the activated SRS resource in the SRS resource group according to the first starting position.

S313: and the network equipment receives the SRS sent by the user equipment.

Thus, in NR-U, for example, SRS can be transmitted starting from an arbitrary symbol (symbol) within a slot (slot). The gap length between the UE sensing that the channel is empty and the actual uplink transmission starts may be any value less than 14OS lengths.

In the embodiment shown in fig. 1, even if NR-U supports configuring startPosition in resource mapping (resourcemaping) as any one of (0, 13), multiple (e.g. 13) SRS resource sets need to be configured, so that SRS resource in each set has different lengths, and SRS with any symbol length in 1-13 can be transmitted, whereas in the present embodiment, by sending an activation indication for indicating whether sounding reference signal SRS resource in the SRS resource group is activated, some or all SRS resources in the SRS resource group can be flexibly activated to realize transmission of SRS with different lengths.

For example, 4 SRS resources can be configured in one SRS resource set, the length is 1OS, 2OS, 4OS and 4OS respectively, and the SRS with the length of 1-11 OS can be obtained by permutation and combination. For example, if the bitmap in the DCI indicates 1011, the SRS is 9 OS long. If more length is needed, a 4OS length SRS resource configuration can be added.

In the LTE Rel-16 specification, more long SRS are under discussion, such as: 8OS, 6OS, 12 OS. The SRS resource length in SRS resource set can be configured as 1OS, 2OS, 4OS, 8 OS. The SRS with the length of 1-14 OS can be obtained by permutation and combination. For example, if bitmap indication 1001 in DCI indicates SRS of 9 OS lengths.

In addition, if bitmap is 4 bits, SRS resource in SRS resource set is 1OS, 2OS, 4OS respectively. Then the bitmap indication 1110 in the DCI indicates that all SRS resources in the SRS resource set are activated, and the redundant 1 bit indicates 0.

Therefore, in this embodiment, by sending an activation instruction, where the activation instruction is used to indicate whether sounding reference signal SRS resources in the SRS resource group are activated, and a start position of a first activated SRS resource is a first start position of the SRS, some or all SRS resources in the SRS resource group can be flexibly activated, and SRS transmissions with different lengths can be implemented through one SRS resource group.

In this embodiment, the activation indication includes a bitmap, where a bit in the bitmap corresponds to an SRS resource in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated, so that part or all of the SRS resources in the SRS resource group can be activated flexibly and selectively.

In this embodiment, the activation indication is carried in the DCI, so that SRS resources in a resource group can be flexibly and dynamically activated.

In this embodiment, by sending the SRS on the activated SRS resource in the SRS resource group according to the first starting position, the SRS with any length can be sent at any time domain position on the unlicensed frequency band without increasing the number of sounding reference signal resource groups, so as to meet the requirement of unlicensed frequency band transmission.

Fig. 4 is another flowchart illustrating a method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application, where the method may be performed by a network device and a user equipment. In other words, the method may be performed by software or hardware installed on the network device and the user device. As shown, the method may include the following steps.

S411: the network device transmits a first starting position of a sounding reference signal, SRS.

S421: the UE receives a first starting position of a sounding reference signal, SRS.

Wherein the first starting position of the SRS is carried in the DCI.

S412: the network device sends an activation indication.

The activation indication indicates whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated.

In an implementation manner, the activation indication includes a bitmap, where a bit in the bitmap corresponds to an SRS resource in the SRS resource group, where SRS resources with multiple lengths are configured in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated, for example, a value of 1 may indicate that the SRS resource is activated, and a value of 0 may indicate that the SRS resource is not activated.

In one implementation, the size of the field in the DCI is fixed, but the number of SRS resources in the SRS resource set may be different, so the number of bits of bitmap may depend on the SRS resource number value with the largest number of SRS resources in the SRS resource set. When the number of resources in the indicated SRS resource set is smaller than the value, the redundant bits are set to inactive, for example, to be 0.

For example, if the maximum number of SRS resources in an SRS resource set is 4 SRS resources, then bitmap is 4 bits, and SRS resources in the indicated SRS resource set are 1OS, 2OS, and 4OS, respectively, then bitmap indication 1110 in DCI indicates that all SRS resources in the SRS resource set are activated, and redundant 1 bit indicates 0.

In one implementation, the size of the field in the DCI is fixed, and under the condition that the number of SRS resources in the SRS resource set is the same, the number of bits of the bitmap depends on the number of SRS resources in the SRS resource set, that is, the bits in the bitmap correspond to the SRS resources in the SRS resource group one to one.

Thus, embodiments of the present application differ from the NR Rel-15 specification in that the activation does not activate all of the SRS resources in SRS resource set, but selectively activates one or more of the SRS resources.

In one implementation, the activation indication is carried in DCI.

S422: the UE receives an activation indication.

It should be noted that, although the embodiment of the present invention is described by taking an example where the network device transmits the activation instruction after transmitting the first start position of the SRS, the embodiment of the present invention does not limit the execution order of the first start position of the SRS transmission and the activation instruction transmission by the network device, that is, the network device may transmit the activation instruction after transmitting the first start position of the SRS, may transmit the activation instruction before transmitting the first start position of the SRS, or may transmit both at the same time, for example, both are carried in DCI, and transmit the first start position and the activation instruction at the same time when transmitting the DCI.

Similarly, the first starting position at which the UE receives the SRS and the execution sequence of receiving the activation instruction are not limited in the embodiment of the present invention, that is, the first starting position at which the UE receives the SRS may be executed before receiving the activation instruction, or may be executed after receiving the activation instruction, or may be received at the same time, for example, both are carried in the DCI, and the first starting position and the activation instruction are received at the same time when receiving the DCI.

S423: and when the SRS collides with other uplink transmission, the UE transmits the SRS on the SRS symbol which does not collide with the other uplink transmission.

And the UE sends the SRS on the SRS symbol which does not collide with the other uplink transmission.

Other uplink transmissions include other uplink transmissions in addition to the SRS transmission, for example, when the SRS collides with the configured granted grant transmission, the SRS symbol colliding with the configured granted grant transmission may be dropped, and the SRS may be transmitted on the SRS symbol that does not collide with the configured granted grant transmission.

In another implementation manner, when the SRS collides with other uplink transmissions, all activated SRS resources may be discarded, and the SRS is not transmitted.

S413: and the network equipment receives the SRS sent by the user equipment.

Specifically, this step may include receiving from the user equipment an SRS on an SRS symbol that does not collide with the other uplink transmissions.

Therefore, in this embodiment, when the SRS collides with other uplink transmissions, the SRS symbol colliding with the other uplink transmissions is discarded, and the SRS is transmitted on the SRS symbol not colliding with the other uplink transmissions, or the activated SRS resource is discarded and the SRS is not transmitted, so that the SRS transmission does not affect the other uplink transmissions.

Fig. 5 is a schematic flowchart illustrating another method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application, where the method may be performed by a network device and a user equipment. In other words, the method may be performed by software or hardware installed on the network device and the user device. As shown, the method may include the following steps.

S511: the network device sends an activation indication.

In one implementation, the start position of the first activated SRS resource is a second start position of the SRS resource configured in the RRC, the start position of the second activated SRS resource depends on the end position of the first activated SRS resource, and so on, the start position of the next activated SRS resource is the end position of the last activated SRS resource. For example, if the 1 st SRS resource ends at symbol 7, the 2 nd SRS resource starts at symbol 8.

The present embodiment differs from the NR Rel-15 specification in that the activation does not activate all SRS resources in SRS resource set, but selectively activates one or more of them.

In one implementation, the activation indication is carried in DCI.

S521: the UE receives an activation indication.

S522: and the UE transmits Sounding Reference Signals (SRS) on the activated SRS resources.

S512: and the network equipment receives the SRS sent by the user equipment.

For example, in NR-U, SRS may start transmission from any symbol (symbol) within a slot (slot). The gap length between the UE sensing that the channel is empty and the actual uplink transmission starts may be any value less than 14OS lengths. In the embodiment shown in fig. 1, even if NR-U supports configuring startPosition in resource mapping (resourcemaping) as any one of (0, 13), multiple SRS resource sets need to be configured, so that SRS resources in each set are different in length, and an SRS of any symbol length in 1-13 can be transmitted, whereas in the present embodiment, by sending an activation indication for indicating whether sounding reference signal SRS resources in the SRS resource group are activated, some or all SRS resources in the resource group can be flexibly activated to realize SRS transmission of different lengths.

For example, 4 SRS resources can be configured in one SRS resource set, the length is 1OS, 2OS, 4OS and 4OS respectively, and the SRS with the length of 1-11 OS can be obtained by permutation and combination. If more length is needed, a 4OS length SRS resource configuration can be added. For example, if the bitmap in the DCI indicates 1011, the SRS is 9 OS long.

In the LTE Rel-16 specification, more long SRS are under discussion, such as: 8OS, 6OS, 12 OS. The SRS resource length in SRS resource set can be configured as 1OS, 2OS, 4OS, 8 OS. The SRS with the length of 1-15 OS can be obtained by permutation and combination. For example, if bitmap indication 1001 in DCI indicates SRS of 9 OS lengths.

Therefore, in this embodiment, by sending an activation instruction, where the activation instruction is used to indicate whether sounding reference signal SRS resources in the SRS resource group are activated, part or all of the SRS resources in the SRS resource group can be activated flexibly to realize transmission of SRSs with different lengths.

Fig. 6 is a schematic flowchart of another method for transmitting sounding reference signals in an unlicensed frequency band according to an embodiment of the present application, where the method may be performed by a network device and a user equipment. In other words, the method may be performed by software or hardware installed on the network device and the user device. As shown, the method may include the following steps.

S611: the network device sends an activation indication.

The activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated, the starting position of the first activated SRS resource is a second starting position configured in RRC, the starting position of the second activated SRS resource depends on the ending position of the first activated SRS resource, and so on, the starting position of the next activated SRS resource is the ending position of the last activated SRS resource. For example, if the 1 st SRS resource ends at symbol 7, the 2 nd SRS resource starts at symbol 8.

In one implementation, the activation indication is carried in DCI.

S621: the UE receives an activation indication.

S622: and when the SRS collides with other uplink transmission, the UE transmits the SRS on the SRS symbol which does not collide with the other uplink transmission.

In another implementation manner, when the SRS collides with other uplink transmissions, the UE may also drop all the activated SRS resources and not transmit the SRS.

S612: and the network equipment receives the SRS sent by the user equipment.

Therefore, in this embodiment, when the SRS collides with other uplink transmissions, the SRS resource colliding with the other uplink transmissions is discarded, and the SRS is transmitted on the SRS symbol not colliding with the other uplink transmissions, or all the activated SRS resources are discarded and the SRS is not transmitted, so that the SRS transmission does not affect the other uplink transmissions.

Fig. 7 shows a schematic structural diagram of a network device according to an embodiment of the present application, where the network device 70 includes: a first transmitting module 71 and a first receiving module 72.

The first sending module 71 is configured to send a first starting position of a sounding reference signal SRS, where the first starting position of the SRS is carried in downlink control information DCI.

The first receiving module 72 is configured to receive the SRS sent by the user equipment, where the SRS is sent by the user equipment according to the first starting position.

In one implementation, the first sending module 71 is further configured to send radio resource control, RRC, signaling, wherein the second starting position of the SRS is not configured in the RRC signaling if a predetermined parameter value of an aperiodic sounding reference signal, SRS, resource group indicates that the SRS is transmitted in an unlicensed frequency band.

In one implementation, the SRS received by the first receiving module 72 is transmitted by the user equipment according to the first starting position, and includes: the SRS is transmitted by the user equipment at or after the first starting position.

In one implementation, the first sending module 71 is further configured to send an activation indication, where the activation indication is used to indicate whether sounding reference signal, SRS, resources in the SRS resource group are activated.

In one implementation, the starting position of the first activated SRS resource is the first starting position of the SRS.

In one implementation, the activation indication includes a bitmap, where a bit in the bitmap corresponds to an SRS resource in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated.

In one implementation, the activation indication is carried in the DCI.

In an implementation manner, the first receiving module 72 is configured to receive the SRS sent by a user equipment, where the SRS is sent by the user equipment on the SRS resource that is activated in the SRS resource group according to the first starting position.

In one implementation, the first receiving module 72 is configured to receive, from the user equipment, an SRS on an SRS symbol that does not collide with other uplink transmissions when the SRS collides with the other uplink transmissions.

The network device 70 provided in this embodiment of the present application may perform the method steps corresponding to the method embodiments in fig. 1 to fig. 6, and implement the functions and beneficial effects of the methods described in the method embodiments, which are not described herein again.

Fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application, where the network device 80 includes: a second transmitting module 81 and a second receiving module 82.

The second sending module 81 is configured to send an activation indication, where the activation indication is used to indicate whether sounding reference signal SRS resources in the sounding reference signal SRS resource group are activated.

The second receiving module 82 is configured to receive, from the user equipment, a sounding reference signal, SRS, on the activated SRS resource.

The activation indication comprises a bitmap, wherein a bit in the bitmap corresponds to the SRS resource in the SRS resource group, and the value of the bit is used for indicating whether the corresponding SRS resource is activated.

In one implementation, the activation indication is carried in downlink control information DCI.

In one implementation, the second receiving module 82 is configured to receive, from the user equipment, an SRS on an SRS symbol that does not collide with other uplink transmissions when the SRS collides with the other uplink transmissions.

The network device 80 provided in this embodiment of the application can execute the corresponding method steps in the method embodiments of fig. 1 to 6, and implement the functions and beneficial effects of the methods described in the method embodiments, which are not described herein again.

Fig. 9 shows a schematic structural diagram of a user equipment according to an embodiment of the present application, where the user equipment 90 includes: a third receiving module 91 and a third transmitting module 92.

The third receiving module 91 is configured to receive a first starting position of a sounding reference signal SRS, where the first starting position of the SRS is carried in downlink control information DCI.

The third sending module 92 is configured to send the SRS according to the first starting position.

In one implementation, the third receiving module 91 is further configured to receive radio resource control, RRC, signaling before the first starting position of the sounding reference signal, SRS, where the second starting position of the SRS is not configured in the RRC signaling if a predetermined parameter value of an aperiodic sounding reference signal, SRS, resource group indicates that the SRS is transmitted in an unlicensed frequency band.

In one implementation, the third transmitting module 92 is configured to transmit the SRS at or after the first starting position.

In one implementation, the third receiving module 91 is further configured to receive an activation indication, where the activation indication is used to indicate whether sounding reference signal, SRS, resources in the SRS resource group are activated.

In one implementation, the activation indication includes a bitmap, where a bit in the bitmap corresponds to the SRS resource in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated.

In one implementation, the activation indication is carried in the DCI.

In one implementation, the third sending module 92 is configured to send the SRS on the activated SRS resource in the SRS resource group according to the first starting position.

In one implementation, the third sending module 92 is configured to send an SRS on an SRS symbol that does not collide with other uplink transmissions when the SRS collides with the other uplink transmissions.

In one implementation, the third sending module 92 is configured to not transmit the SRS when the SRS collides with other uplink transmissions.

The user equipment 90 provided in this embodiment of the application may perform the method steps corresponding to the method embodiments in fig. 1 to fig. 6, and implement the functions and beneficial effects of the methods described in the method embodiments, which are not described herein again.

Fig. 10 shows another schematic structural diagram of a user equipment provided in an embodiment of the present application, where the user equipment 100 includes: a fourth receiving module 110 and a fourth transmitting module 120.

The fourth receiving module 110 is configured to receive an activation indication, where the activation indication indicates whether a sounding reference signal, SRS, resource in a sounding reference signal, SRS, resource group is activated.

The fourth sending module 120 is configured to send a sounding reference signal, SRS, on the activated SRS resource.

In one implementation, the fourth sending module 120 is configured to send, when the SRS collides with other uplink transmissions, an SRS on an SRS symbol that does not collide with the other uplink transmissions.

In one implementation, the fourth sending module 120 is configured to not transmit the SRS when the SRS collides with other uplink transmissions.

The user equipment 100 provided in this embodiment of the application may perform the method steps corresponding to the method embodiments in fig. 1 to fig. 6, and implement the functions and beneficial effects of the methods described in the method embodiments, which are not described herein again.

Fig. 11 is a block diagram of a user equipment of another embodiment of the present invention. The illustrated user equipment 1100 includes: at least one processor 1101, memory 1102, at least one network interface 1104, and a user interface 1103. The various components in user device 1100 are coupled together by a bus system 1105. It is understood that the bus system 1105 is used to enable communications among the components. The bus system 1105 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 in fig. 11 as the bus system 1105.

The user interface 1103 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It is to be understood that the memory 1102 in embodiments of the present invention can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (erasabprom, EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. The volatile memory may be a Random Access Memory (RAM) which functions as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (staticiram, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (syncronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM ), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1102 of the subject systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1102 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 11021 and application programs 11022.

The operating system 11021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 11022 contains various applications such as a media player (MediaPlayer), a Browser (Browser), and the like for implementing various application services. Programs that implement methods in accordance with embodiments of the invention may be included in application 11022.

In this embodiment of the present invention, the user equipment 1100 further includes: a computer program stored on a memory and executable on a processor, the computer program when executed by the processor implementing the steps of: receiving a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI); and transmitting the SRS according to the first starting position.

Or the following steps are realized: receiving an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated or not; and transmitting Sounding Reference Signals (SRS) on the activated SRS resources.

The methods disclosed in the embodiments of the present invention described above may be implemented in the processor 1101 or by the processor 1101. The processor 1101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1101. The processor 1101 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 1102, and the processor 1101 reads the information in the memory 1102 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 1101, performs the steps of the method embodiments of fig. 1-6 as described above.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Optionally, the computer program when executed by the processor 1101 may further implement the steps of:

in one implementation, radio resource control, RRC, signaling is received before the first starting position of the sounding reference signal, SRS, where, if a predetermined parameter value of an aperiodic sounding reference signal, SRS, resource group indicates that the SRS is transmitted in an unlicensed frequency band, the second starting position of the SRS is not configured in the RRC signaling.

In one implementation, the SRS is transmitted at or after the first starting position.

In one implementation, there is further implemented: receiving an activation indication indicating whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated.

In one implementation, the activation indication is carried in the DCI.

In one implementation, the SRS is transmitted on the activated SRS resource in the set of SRS resources according to the first starting position.

In one implementation, when the SRS collides with other uplink transmissions, an SRS is transmitted on SRS symbols that do not collide with the other uplink transmissions.

In one implementation, the SRS is not transmitted when the SRS collides with other uplink transmissions.

Alternatively, the computer program may also realize the following steps when executed by the processor 1101: the activation indication comprises a bitmap, wherein a bit in the bitmap corresponds to the SRS resource in the SRS resource group, and the value of the bit is used for indicating whether the corresponding SRS resource is activated.

The user equipment 1100 may implement the processes implemented by the user equipment in the foregoing embodiments, and implement the same or similar effects, and details are not described here to avoid repetition.

Fig. 12 is a structural diagram of a network device applied in the embodiment of the present invention, and the network device 1200 includes: a processor 1201, a transceiver 1202, a memory 1203, a user interface 1204 and a bus interface, wherein:

in this embodiment of the present invention, the network device 1200 further includes: a computer program stored on the memory 1203 and executable on the processor 1201, the computer program when executed by the processor 1201 performing the steps of: sending a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI); receiving the SRS sent by user equipment, wherein the SRS is sent by the user equipment according to the first starting position. Alternatively, the computer program when executed by the processor 1201 implements the steps of: transmitting an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated or not; receiving, from a user equipment, a sounding reference signal, SRS, on the activated SRS resource.

In fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits linking one or more processors, represented by the processor 1201, and memory, represented by the memory 1203. 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 1202 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. The user interface 1204 may also be an interface to connect externally to a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1201 is responsible for managing a bus architecture and general processing, and the memory 1203 may store data used by the processor 1201 in performing operations.

Optionally, the computer program when executed by the processor 1203 may further implement the following steps: in one implementation, radio resource control, RRC, signaling is transmitted before the first starting position of the sounding reference signal, SRS, where if a predetermined parameter value of an aperiodic sounding reference signal, SRS, resource group indicates that the SRS is transmitted in an unlicensed frequency band, the second starting position of the SRS is not configured in the RRC signaling.

In one implementation, the SRS is transmitted by the user equipment at or after the first starting position.

In one implementation, there is further implemented: transmitting an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated.

In one implementation, the activation indication is carried in the DCI.

In one implementation manner, the SRS transmitted by a user equipment is received, where the SRS is transmitted by the user equipment on the SRS resource activated in the SRS resource group according to the first starting position.

In one implementation, when the SRS collides with other uplink transmissions, an SRS on an SRS symbol that does not collide with the other uplink transmissions is received from the user equipment.

Alternatively, the computer program may also realize the following steps when executed by the processor 1203: in one implementation, the activation indication includes a bitmap, where a bit in the bitmap corresponds to the SRS resource in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated.

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: sending a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI); receiving the SRS sent by user equipment, wherein the SRS is sent by the user equipment according to the first starting position.

Alternatively, the computer program when executed by a processor implements: transmitting an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated or not; receiving, from a user equipment, a sounding reference signal, SRS, on the activated SRS resource.

Alternatively, the computer program when executed by a processor implements: receiving a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI); and transmitting the SRS according to the first starting position.

Alternatively, the computer program when executed by a processor implements: receiving an activation indication, wherein the activation indication is used for indicating whether Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated or not; and transmitting Sounding Reference Signals (SRS) on the activated SRS resources.

Specifically, when being executed by the processor, the computer program implements each process of the method embodiments shown in fig. 1 to 6, 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 phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. 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

1. A method for transmitting sounding reference signals in an unlicensed frequency band is applied to a network device, and includes:

sending a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI), and the first starting position is an arbitrary symbol position in a time slot; and

receiving the SRS sent by user equipment, wherein the SRS is sent by the user equipment according to the first starting position;

the method further comprises the following steps:

transmitting an activation indication for indicating whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated;

the starting position of the first activated SRS resource in the SRS resource group is the first starting position of the SRS.

2. The transmission method of claim 1, wherein the SRS is transmitted by the user equipment according to the first starting position, comprising:

the SRS is transmitted by the user equipment at or after the first starting position.

3. The transmission method of claim 1, wherein the activation indication comprises a bitmap, wherein a bit in the bitmap corresponds to an SRS resource in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resource is activated.

4. The transmission method of claim 1, wherein the activation indication is carried in the DCI.

5. The transmission method of claim 1, wherein the SRS is transmitted by the user equipment according to the first starting position, comprising:

the SRS is transmitted by the user equipment on the activated SRS resource in the SRS resource group according to the first starting position.

6. The transmission method according to one or more of claims 1 to 5, wherein the receiving the SRS sent by the user equipment comprises:

when the SRS collides with other uplink transmissions, receiving, from the user equipment, an SRS over SRS symbols that do not collide with the other uplink transmissions.

7. The transmission method according to one or more of claims 1 to 5, characterized in that, before said first starting position of Sounding Reference Signal (SRS) transmission, it further comprises:

and sending Radio Resource Control (RRC) signaling, wherein if a preset parameter value of an aperiodic Sounding Reference Signal (SRS) resource group indicates that the SRS is transmitted on an unlicensed frequency band, a second starting position of the SRS is not configured in the RRC signaling.

8. A method for transmitting sounding reference signals in an unlicensed frequency band is applied to a network device, and includes:

sending an activation instruction, wherein the activation instruction is used for indicating whether part or all of Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated, and the activation instruction is used for performing SRS resource activation by taking the SRS resources in the SRS resource group as activation granularity; and

receiving, from a user equipment, a sounding reference signal, SRS, on the activated SRS resource.

9. The transmission method of claim 8, wherein the activation indication comprises a bitmap, wherein a bit in the bitmap corresponds to the SRS resources in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resources are activated.

10. The transmission method according to claim 8, wherein the activation indication is carried in downlink control information, DCI.

11. The transmission method according to claim 8, wherein the receiving sounding reference signals, SRSs, on the activated SRS resources from the user equipment comprises:

12. A method for transmitting sounding reference signals of an unlicensed frequency band, applied to a user equipment, includes:

receiving a first starting position of a Sounding Reference Signal (SRS), wherein the first starting position of the SRS is carried in Downlink Control Information (DCI), and the first starting position is an arbitrary symbol position in a time slot; and

transmitting the SRS according to the first starting position;

the method further comprises the following steps: receiving an activation indication indicating whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated;

13. The transmission method of claim 12, wherein the transmitting the SRS according to the first starting position comprises:

transmitting the SRS at or after the first starting position.

14. The transmission method of claim 12, wherein the activation indication comprises a bitmap, wherein a bit in the bitmap corresponds to the SRS resources in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resources are activated.

15. The transmission method of claim 12, wherein the activation indication is carried in the DCI.

16. The transmission method of claim 12, wherein transmitting the SRS according to the first start position comprises:

and according to the first starting position, transmitting the SRS on the activated SRS resource in the SRS resource group.

17. The transmission method according to one or more of claims 12-16, wherein said transmitting the SRS according to the first starting position comprises:

and when the SRS collides with other uplink transmission, sending the SRS on the SRS symbol which does not collide with the other uplink transmission.

18. The transmission method according to one or more of claims 12-16, wherein said transmitting the SRS according to the first starting position comprises:

when the SRS collides with other uplink transmissions, the SRS is not transmitted.

19. The transmission method according to one or more of claims 12-16, wherein prior to the receiving a first starting position of a sounding reference signal, SRS, further comprising:

receiving Radio Resource Control (RRC) signaling, wherein if a predetermined parameter value of an aperiodic Sounding Reference Signal (SRS) resource group indicates that the SRS is transmitted on an unlicensed frequency band, a second starting position of the SRS is not configured in the RRC signaling.

20. A method for transmitting sounding reference signals of an unlicensed frequency band, applied to a user equipment, includes:

receiving an activation indication, wherein the activation indication is used for indicating whether part or all of Sounding Reference Signal (SRS) resources in a Sounding Reference Signal (SRS) resource group are activated, and the activation indication is used for performing SRS resource activation by taking the SRS resources in the SRS resource group as activation granularity; and

and transmitting Sounding Reference Signals (SRS) on the activated SRS resources.

21. The transmission method of claim 20, wherein the activation indication comprises a bitmap, wherein a bit in the bitmap corresponds to the SRS resources in the SRS resource group, and a value of the bit is used to indicate whether the corresponding SRS resources are activated.

22. The transmission method of claim 20, wherein the activation indication is carried in downlink control information, DCI.

23. The transmission method of claim 20, wherein the transmitting sounding reference signals, SRSs, on the activated SRS resources comprises:

24. The transmission method of claim 20, wherein the transmitting sounding reference signals, SRSs, on the activated SRS resources comprises:

25. A network device, comprising:

a first sending module, configured to send a first starting position of a Sounding Reference Signal (SRS), where the first starting position of the SRS is carried in Downlink Control Information (DCI), and the first starting position is an arbitrary symbol position in a slot; and

a first receiving module, configured to receive the SRS sent by a user equipment, where the SRS is sent by the user equipment according to the first starting position;

the first receiving module is further configured to send an activation indication, where the activation indication is used to indicate whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated;

wherein a starting position of a first activated SRS resource in the SRS resource group is a first starting position of the SRS.

26. A network device, comprising:

a second sending module, configured to send an activation instruction, where the activation instruction is used to indicate whether sounding reference signal SRS resources in a sounding reference signal SRS resource group are activated, and the activation instruction is used to activate SRS resources with SRS resources in the SRS resource group as an activation granularity; and

a second receiving module, configured to receive, from a user equipment, a sounding reference signal, SRS, on the activated SRS resource.

27. A user device, comprising:

a third receiving module, configured to receive a first starting position of a Sounding Reference Signal (SRS), where the first starting position of the SRS is carried in Downlink Control Information (DCI), and the first starting position is an arbitrary symbol position in a slot; and

a third sending module, configured to send the SRS according to the first starting position;

the third receiving module is further configured to receive an activation indication, where the activation indication is used to indicate whether Sounding Reference Signal (SRS) resources in the SRS resource group are activated;

28. A user device, comprising:

a fourth receiving module, configured to receive an activation instruction, where the activation instruction is used to indicate whether part or all of sounding reference signal SRS resources in a sounding reference signal SRS resource group are activated, and the activation instruction is to activate SRS resources with SRS resources in the SRS resource group as an activation granularity; and

a fourth sending module, configured to send a sounding reference signal SRS on the activated SRS resource.

29. A network device, comprising: a memory, a processor 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 according to any one of claims 1 to 7; or implementing the steps of a method as claimed in any one of claims 8 to 11.

30. A user device, comprising: a memory, a processor 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 of any one of claims 12 to 19; or implementing the steps of a method as claimed in any one of claims 20 to 24.

31. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7; or implementing the steps of a method as claimed in any one of claims 8 to 11.

32. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 12 to 19; or implementing the steps of a method as claimed in any one of claims 20 to 24.