WO2017194005A1 - Signal transmission method and device, and user equipment - Google Patents

Abstract

Disclosed are a signal transmission method and device, and a user equipment. The method comprises: determining a symbol position for transmitting a sounding reference signal (SRS); and transmitting an SRS over the determined symbol position.

Description

Signal transmission method, device and user equipment Technical field

The present application relates to, but is not limited to, the field of communications, and more particularly to a signal transmission method, apparatus, and user equipment (User Equipment, UE for short).

Background technique

With the rapid growth of data services, the data transmission pressure on the carrier of the licensed spectrum is also increasing. Therefore, sharing the data traffic in the licensed carrier through the carrier of the unlicensed spectrum becomes an important evolution direction of the development of the Long Term Evolution (LTE). Among them: unlicensed spectrum has the following characteristics: free/low cost; low entry requirements, low cost; large available bandwidth; resource sharing;

In the standardized research process of Licensed Assisted Access (LAA), Sounding Reference Signal (SRS) is being studied as an important issue. The purpose of introducing SRS is to obtain uplink timing and uplink channel state information (CSI). In addition, the LAA is a natural Time Division Duplex (TDD) carrier, and the downlink CSI can be used to obtain uplink CSI according to channel reciprocity. However, since the LBT (Listen Before Talk, LBT for short) mechanism restricts the downlink signal transmission, it is difficult for the base station to obtain channel information feedback from the UE side in time. In addition, the downlink CSI also has the characteristics of less measurement opportunities and large delay between measurement and reporting, so that the LAA uplink SRS is a mandatory option. Based on this, the SRS transmission has been studied and discussed in the current Rel-14eLAA.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a signal transmission method, device and user equipment to improve the transmission opportunity of the SRS.

According to an embodiment of the present invention, there is provided a signal transmission method comprising: determining a symbol position for transmitting a sounding reference signal SRS; transmitting the SRS at the determined symbol position; wherein the symbol position is Time domain symbol position or candidate time domain symbol position.

According to another embodiment of the present invention, there is provided a signal transmission apparatus comprising: a first determining module configured to determine a symbol position for transmitting a sounding reference signal SRS; a first transmission module configured to determine The SRS is transmitted at a symbol position; wherein the symbol position is a time domain symbol position or a candidate time domain symbol position.

According to a further embodiment of the invention, there is provided a user equipment UE, comprising the apparatus of any of the above.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the above signal transmission method.

Through the embodiment of the present invention, the symbol position for transmitting the sounding reference signal SRS is determined, and the effect of effectively improving the transmission opportunity of the SRS is achieved.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a block diagram showing the hardware structure of a user equipment of a signal transmission method according to an embodiment of the present invention;

2 is a flow chart of a signal transmission method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of determining a time domain subframe position of an SRS transmission according to a timing relationship n+k according to an embodiment of the present invention; FIG.

4 is a first schematic diagram of determining a time domain subframe position of an SRS transmission according to a timing relationship n+k1 according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of determining a time domain subframe position of an SRS transmission according to a timing relationship n+k1 according to an embodiment of the present invention; FIG.

6 is a first DCI signaling trigger SRS transmission according to an embodiment of the present invention. The second DCI signaling is determined according to an n+k or n+k1 timing relationship, and the time domain subframe position and/or SRS transmission time of the SRS transmission is determined according to an n+k or n+k1 timing relationship. Schematic diagram of the location of the domain symbol;

7 is a first DCI signaling triggering SRS transmission according to an embodiment of the present invention, and indicating a time domain subframe position of an SRS transmission according to an n+k timing relationship, where the second DCI signaling determines an SRS transmission according to an n+k1 timing relationship. Schematic diagram of the location of the time domain symbol;

8 is a schematic diagram of introducing a self-delay operation in an LBT mechanism when different UEs configure a time domain symbol position of the same SRS transmission according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a time domain structure in a subframe at the end of a downlink transmission burst according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic diagram of different SRS transmission time domain symbols configured by different UEs in a downlink subframe of a downlink transmission burst according to an embodiment of the present invention; FIG.

11 is a schematic diagram of frequency domain repetition N satisfying ETSI regulatory bandwidth requirements according to an embodiment of the present invention;

12 is a schematic diagram of satisfying an ETSI regulatory bandwidth requirement by using a block interleaving method according to an embodiment of the present invention;

FIG. 13 is a block diagram 1 of a structure of a signal transmission apparatus according to an embodiment of the present invention; FIG.

FIG. 14 is a structural block diagram 1 of a first determining module 132 in a signal transmission apparatus according to an embodiment of the present invention;

FIG. 15 is a second structural block diagram of a first determining module 132 in a signal transmission apparatus according to an embodiment of the present invention;

16 is a structural block diagram 2 of a signal transmission apparatus according to an embodiment of the present invention;

17 is a block diagram 3 of a structure of a signal transmission apparatus according to an embodiment of the present invention;

FIG. 18 is a structural block diagram of a user equipment UE 10 according to an embodiment of the present invention.

Detailed

The present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. order.

Example 1

The method embodiment provided in Embodiment 1 of the present application can be executed in a user equipment, a computer terminal, or the like. Taking a user equipment as an example, FIG. 1 is a hardware structural block diagram of a user equipment of a signal transmission method according to an embodiment of the present invention. As shown in FIG. 1, user equipment 10 may include one or more (only one shown) processor 102 (processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) A memory 104 for storing data, and a transmission device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in FIG. 1 is merely illustrative and does not limit the structure of the above electronic device. For example, user device 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than that shown in FIG.

The memory 104 can be configured as a software program and a module for storing application software, such as program instructions/modules corresponding to the signal transmission method in the embodiment of the present invention, and the processor 102 executes each by executing a software program and a module stored in the memory 104. A functional application and data processing, that is, the above method is implemented. Memory 104 may include high speed random access memory, and may also include non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 104 may further include memory remotely located relative to processor 102, which may be connected to user device 10 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 106 is arranged to receive or transmit data via a network. The network instance described above may include a wireless network provided by a communication provider of the user equipment 10. In one example, the transmission device 106 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module configured to communicate with the Internet wirelessly.

In the above context, as of now, the SRS has reached the following conclusions in the eLAA: support for the non-periodic sounding reference signal and the Physical Uplink Shared Channel (SRS with PUSCH) transmission. Support for aperiodic sounding reference signals not shared with physical uplinks Channel SRS without PUSCH transmission. Acyclic SRS (without PUSCH) is supported for transmission in the downlink sub-frame. The transmission of SRS in the uplink subframe is under further study.

In this embodiment, a signal transmission method running on a user equipment is provided. FIG. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention. As shown in FIG. 2, the flow includes the following steps:

Step S202, determining a symbol position for transmitting the sounding reference signal SRS; wherein the symbol position is a time domain symbol position or a candidate time domain symbol position;

Step S204, transmitting the SRS at the determined symbol position.

The symbol position for transmitting the sounding reference signal SRS is determined by the above steps, which effectively increases the transmission opportunity of the SRS.

The execution body of the above steps may be a user equipment or the like, but is not limited thereto.

In an embodiment, the symbol position for transmitting the sounding reference signal SRS is determined according to at least one of the following:

a manner according to a predetermined correspondence between the number of symbols and the position of the symbol;

Adopting a clear indication of signaling;

Implied convention.

In an embodiment, the predetermined correspondence between the number of symbols and the position of the symbol includes at least one of the following: a correspondence between the index number and a different number of symbols and a symbol position; and a predetermined number of symbols, the index number and the symbol The correspondence between the locations.

In an embodiment, determining the symbol location for transmitting the SRS comprises determining a symbol location for transmitting the SRS based on the acquired index number.

In an embodiment, the index number is obtained by at least one of the following methods: a manner of controlling RRC signaling by a high-layer radio link, a mode of controlling DCI signaling by a physical layer downlink control, and a pre-agreed by a base station and a user equipment UE. In the RRC signaling, or physical layer DCI signaling, a field for indicating an index number is added.

In an embodiment, in a manner that the signaling is explicitly indicated, the signaling that explicitly indicates the symbol location used for transmitting the SRS includes at least one of the following signaling: high layer RRC signaling; physical layer DCI letter. Let, in the signaling, include a field for indicating the symbol position of the SRS transmission.

In an embodiment, the method for explicitly indicating the signaling includes: the high-layer RRC signaling configures the SRS transmission time domain location or the candidate time domain location, and the physical layer DCI signaling triggers the SRS time domain location configured by the high-layer RRC signaling. Or the candidate time domain location is valid; or the SRS time domain location or the candidate time domain location configured by the high layer RRC signaling is configured as soon as possible; or the SRS time domain location or the candidate time domain location configured by the upper layer RRC signaling, It takes effect in the sub-frame or the uplink transmission burst at the end of the downlink transmission burst.

In an embodiment, the means for explicitly indicating the signaling includes: the physical layer DCI signaling carries a symbol location field for indicating the SRS transmission; or the first physical layer DCI signaling triggers the SRS transmission, The second physical layer DCI signaling indicates the symbol location of the SRS transmission.

In an embodiment, the first physical layer DCI signaling triggers the SRS transmission, including: the first physical layer DCI signaling carries a field for triggering the SRS transmission, where the field triggering the SRS transmission includes: triggering an SRS transmission, Or, multiple SRS transmissions.

In an embodiment, the symbol position for transmitting the SRS is determined by implicitly agreeing, including at least one of: determining a symbol position for transmitting the SRS according to the number of symbols remaining in the subframe at the end portion of the downlink transmission burst; The moment when the LBT mechanism is successfully executed is determined to determine the symbol position for transmitting the SRS; the base station and the UE determine the symbol position for transmitting the SRS in a manner agreed in advance.

In summary, the obtaining the time domain symbol position for the SRS transmission may include: determining the time domain symbol position of the SRS transmission according to the correspondence between the number of different symbols and the time domain symbol position of the SRS transmission; according to the number of different symbols and the candidate time domain Determining the candidate time domain symbol position according to the symbol position correspondence; determining the time domain symbol position of the SRS transmission according to the high layer RRC signaling, or the candidate time domain symbol position; determining the time domain symbol position of the SRS transmission according to the physical layer DCI signaling, or a candidate time domain symbol position; determining a time domain symbol position of the SRS transmission according to an implicit manner, or a candidate time domain symbol position; determining a time domain symbol position of the SRS transmission according to a predefined manner, or a candidate time domain symbol position.

In an embodiment, the time domain subframe position or the candidate time domain subframe position to which the symbol position for transmitting the SRS belongs may be determined by at least one of the following: a manner configured by high layer RRC signaling; and a physical layer DCI Mode of signaling configuration; through high-layer RRC signaling and physical layer The manner in which the DCI signaling is combined with the configuration; the method of combining the physical layer DCI signaling by N times, where N is an integer greater than or equal to 1; in a manner implicitly agreed; in a manner agreed by the base station and the UE in advance.

In an embodiment, determining the time domain subframe position or the candidate time domain subframe position by using the high layer RRC signaling configuration includes: configuring the parameter for the SRS transmission by using the high layer RRC signaling to determine the time domain subframe position or candidate The time domain sub-frame position; or the parameters for the SRS transmission configured by the high-layer RRC signaling are valid once configured; or the parameters for the SRS transmission configured by the high-layer RRC signaling are valid during the uplink transmission burst; The parameters for SRS transmission include at least one of the following: period, offset, transmission comb, cyclic shift, symbol index of LBT, time domain pattern of SRS transmission, time window of SRS transmission, offset within time window , time window interval, start position of SRS transmission time window, one transmission, multiple transmission.

In an embodiment, determining, by the physical layer DCI signaling configuration, the time domain subframe position or the candidate time domain subframe position may include at least one of the following: the physical layer DCI signaling that triggers the SRS transmission is on the subframe n. Transmitting, determining a time domain subframe position or a candidate time domain subframe position according to a predetermined timing relationship; carrying a field indicating a time domain subframe position or a candidate time domain subframe position in the physical layer DCI signaling, and determining a time domain according to the field Subframe position or candidate time domain subframe position.

In an implementation manner, determining, by using a combination of the high layer RRC signaling and the physical layer DCI signaling, that the time domain subframe position or the candidate time domain subframe position may include at least one of the following: a high layer RRC signaling configuration for the SRS The parameters of the transmission, the physical layer DCI signaling triggers the parameters of the SRS transmission configured by the upper layer RRC signaling to be valid; the high layer RRC signaling configures at least one of the parameters used for the SRS transmission, and the physical layer DCI signaling is configured with the upper layer RRC. Signaling unconfigured parameters of the SRS transmission; the high layer RRC signaling is configured to configure at least one of the parameters of the SRS transmission, and the physical layer DCI signaling carries the time domain subframe position or the candidate time domain subframe indicating the SRS transmission. a field of a location, determining a time domain subframe position or a candidate time domain subframe position for SRS transmission according to the field; the high layer RRC signaling configures at least one of parameters for SRS transmission, and the physical layer DCI signaling triggers the SRS transmission And/or determining a time domain subframe position or a candidate time domain subframe position for SRS transmission according to a predetermined timing relationship; wherein, the parameter for SRS transmission includes at least one of the following: a period, an offset, a transmission comb Tooth, cyclic shift, LBT symbol index, time domain pattern of SRS transmission, time window of SRS transmission, time window offset, time window interval, SRS transmission time window Starting position, one transmission, multiple transmissions.

In an embodiment, determining, by using N times physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position may include at least one of: configuring SRS transmission by the first physical layer DCI signaling The time domain subframe position or the candidate time domain subframe position, the information of the first physical layer DCI signaling configuration is enabled by the second physical layer DCI signaling, and/or the SRS transmission is triggered by the second physical layer DCI signaling; SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is indicated by the second physical layer DCI signaling; the SRS transmission is triggered by the first physical layer DCI signaling, and the a second physical layer DCI signaling, determining a time domain subframe position or a candidate time domain subframe position of the SRS transmission according to a predetermined timing relationship; determining, by the first physical layer DCI signaling, a time domain subframe position of transmitting the SRS according to a predetermined timing relationship Or the candidate time domain subframe position, triggering the SRS transmission by the second physical layer DCI signaling, and/or triggering the time domain subframe position of the SRS transmission determined by the first physical layer DCI signaling by the second physical layer DCI signaling Or candidate time domain subframe position enable

In an embodiment, the predetermined timing relationship includes: n+k; or, n+k1; wherein n is a subframe number sent by the physical layer DCI signaling that triggers the SRS transmission, or the physicality of the SRS transmission time domain symbol location The sub-frame number sent by the layer DCI signaling; k is a positive integer greater than or equal to 4; k1 is a positive integer greater than or equal to 0.

In an embodiment, k or k1 may be obtained by at least one of the following: a high-level RRC signaling configuration; a physical layer DCI signaling indication; and a base station and a UE pre-agreed mode.

In an embodiment, the physical layer DCI signaling includes one of the following: UE-specific DCI signaling, using DCI format 0/4; common DCI signaling, using DCI format 1C; group downlink control information Group DCI signaling, adopting DCI format 3/3A; downlink downlink control information DL DCI signaling, using DCI format 1A/2A/2B/2C; new DCI signaling.

In an embodiment, the time domain subframe position or the candidate time domain subframe position of the SRS transmission is determined by an implicit agreement, including at least one of the following: an SRS parameter configured to enable high layer RRC signaling configuration after the downlink transmission burst ends Or the time domain subframe position or the candidate time domain subframe position of the SRS transmission explicitly indicated by the physical layer DCI signaling; the last partial subframe after the downlink transmission burst; the first uplink subframe after the downlink transmission burst; the downlink transmission burst After the second uplink subframe, after the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an even number corresponding to the sub-frame. Frame; after the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an odd-numbered subframe; the first uplink subframe in the uplink transmission burst; the second uplink subframe in the uplink transmission burst; and the uplink subframe in the uplink transmission burst The frame index is an even-numbered subframe; the uplink subframe index in the uplink transmission burst is an odd-numbered subframe; wherein the SRS parameter includes at least one of the following: a period, an offset, a transmission comb, a cyclic shift, and an LBT Symbol index, time domain pattern of SRS transmission, time window of SRS transmission, offset in time window, interval in time window, starting position of SRS transmission time window, one transmission, multiple transmission.

In summary, the acquiring the time domain subframe position for the SRS transmission may include: determining the time domain subframe position of the SRS transmission according to a specific timing relationship by triggering the subframe n transmitted by the physical layer DCI signaling of the SRS transmission. Or, the candidate time domain subframe position; the physical layer DCI signaling that triggers the SRS transmission explicitly indicates the time domain subframe position of the SRS transmission, or the candidate time domain subframe position; triggers the SRS by the first physical layer DCI signaling And transmitting, by using the second physical layer DCI signaling, determining a time domain subframe position of the SRS transmission according to a specific timing relationship, or a candidate time domain subframe position; triggering the SRS transmission by using the first physical layer DCI signaling, and adopting the second physical The layer DCI signaling explicitly indicates the time domain subframe position of the SRS transmission, or the candidate time domain subframe position; the SRS transmission is triggered by the physical layer DCI signaling, and the time domain subframe position of the SRS transmission is determined by an implicit manner, or The candidate time domain subframe position is triggered by the physical layer DCI signaling, and the time domain subframe position of the SRS transmission or the candidate time domain subframe position is determined by a predefined manner.

The time domain subframe used for transmitting the SRS may be a subframe at the end of the downlink transmission burst, or may be an uplink normal subframe. In an embodiment, when the time domain subframe used for transmitting the SRS is the downlink transmission burst partial subframe, the time domain symbol position for transmitting the SRS may be determined by at least one of the following manners: the UE may follow the pre- The number of remaining symbols in the subframe at the end of the defined downlink transmission burst corresponds to the time domain symbol position of the SRS transmission, or the candidate time domain symbol position; the number of different symbols configured by the UE according to the RRC signaling and the time domain symbol position of the SRS transmission, or a sequence index number corresponding to the candidate time domain symbol position, determining a time domain symbol position of the SRS transmitted in the end portion of the downlink burst, or a time domain symbol position of the candidate SRS transmission; the UE explicitly indicates in accordance with the physical layer DCI signaling The time domain symbol position of the SRS transmitted in the end portion of the downlink burst, or the candidate time domain symbol position; the UE knows the number of remaining symbols by detecting the common DCI signaling to implicitly determine the time domain symbol bit of the SRS transmitted in the end portion of the downlink burst Set, or, candidate time domain symbol position.

The above-mentioned time domain subframe position or candidate time domain subframe position information for indicating SRS transmission, and symbol position information for indicating SRS transmission in the same physical layer DCI signaling, or at different physical layer DCI In the signaling.

In an embodiment, transmitting the SRS at the symbol position on the time domain subframe position may include the following cases: different user equipment UEs are transmitted in the same one time domain symbol position; different UEs are in different time domain symbols. Location transmission; different UEs are transmitted in the same candidate time domain symbol position; different UEs are transmitted in different candidate time domain symbol positions.

In an embodiment, different UEs are multiplexed by different transmission combs and/or cyclic shifts in the case of transmissions on the same time domain symbol location or candidate time domain symbol location.

In an embodiment, transmitting, by the different UEs in the same or different candidate time domain symbol positions comprises: stopping the candidate time domain symbol positions in a case where a predetermined time domain symbol position transmission SRS is successful in the candidate time domain symbol positions Transmitting SRS in other time domain symbol positions than the predetermined time domain symbol position; or, in the case where a predetermined time domain symbol position transmission SRS in the candidate time domain symbol position is successful, continuing to be excluded in the candidate time domain symbol position The SRS is transmitted at other time domain symbol locations than the predetermined time domain symbol location.

In an embodiment, before the different UEs transmit in the same or different symbol positions, the method further includes: performing an LBT mechanism after the first listening, and transmitting the SRS at the symbol position if the LBT mechanism is successful.

In an embodiment, when the symbol position is a candidate time domain symbol position, performing the LBT mechanism includes: adopting the same or different LBT mechanisms for different candidate time domain symbol positions, wherein when different LBT mechanisms are used The LBT mechanism performed before the previous candidate time domain symbol position is simplified compared to the LBT mechanism performed before the latter candidate time domain symbol position, or there is a shorter contention window.

Based on the conclusion of the Rel-14 3GPP Ran1#84bis meeting, the following consensus is reached on the transmission bandwidth problem on unlicensed carriers: Agreement: Only wideband SRS transmission in supported in eLAA; Existing max#SRS RBs for a given system bandwidth is the Baseline;FFS whether or not to extend/shift to#of RBs>max#RBs in the Legacy case.

Based on the conclusions of the above meeting, only the SRS transmission of broadband is currently supported in the LAA. In addition, the transmission bandwidth of the SRS must meet the requirements of at least 80% of the total occupied bandwidth specified in the regulations. However, according to the LTE technology, only C _SRS =0, 1, 2 in the SRS transmission bandwidth satisfies the bandwidth regulation requirements of the ETSI (European Telecommunications Standards Institute). Based on this, in the LAA, under the premise of supporting broadband SRS, it is necessary to consider the method of complying with the bandwidth requirements of ETSI when C _SRS ≥ 2.

In view of this, in the embodiment, at least one of the following manners can be adopted to meet the regulatory requirement that the SRS transmission bandwidth accounts for at least 80% of the total bandwidth: by repeating the SRS occupying the bandwidth for a predetermined number of times N, by increasing the length of the SRS sequence. In a manner, by increasing the manner of the transmission comb, the method of modifying the subcarrier spacing, by means of frequency domain frequency hopping, by means of resource block interleaving, by means of block interleaving.

In order to explain the above method embodiments, the following embodiments are provided for explanation. It should be noted that the effects of the present application are not limited to the embodiments listed below.

Example 1

In this embodiment, a correspondence relationship between different OFDM (Orthogonal Frequency Division Multiplexing) symbol numbers and SRS transmission time domain positions is given.

For the LAA downlink, it is explicitly stated in Rel-13 that some sub-frames are allowed to appear in the downlink. Among them, some sub-frames are further divided into a starting partial subframe, and a last partial subframe.

In an embodiment, the last partial subframe refers to a position at which the end of the transmission is a boundary of an OFDM symbol in the subframe, that is, the transmission end position is not a subframe boundary. As the name implies, the beginning of a partial subframe means that the position of the start of the transmission does not start from the boundary of the subframe, but starts from the boundary of an OFDM symbol in the subframe.

In an embodiment, the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst in the LAA includes one of the following: 3, 6, 9, 10, 11, 12, 14 symbols.

In this embodiment, the number of different OFDM symbols and the time domain position of the SRS transmission are mainly given. Correspondingly, the correspondence between the number of different OFDM symbols and the SRS transmission interval or the candidate SRS transmission time domain position is also given. include:

Correspondence between the number of different OFDM symbols and the time domain position of SRS transmission

Table 1 mainly shows the symbol positions at which the terminal UE transmits the SRS in one subframe for 1 to 14 or 1 to 12 OFDM symbols.

Table 1: Corresponding to the symbol position of SRS transmission according to the number of different symbols

As can be seen from Table 1, the terminal UE can determine the time domain symbol position of an SRS transmission based on a sequence index number. Wherein, if the UE contends for the use right of the unlicensed carrier before the determined SRS symbol position, the UE transmits the SRS at the corresponding SRS symbol position. Conversely, give up this opportunity to transmit SRS at the SRS symbol location. Alternatively, if the gap (interval) between the end of the downlink transmission and the SRS transmission symbol position is not greater than the preset duration, the UE may directly transmit the SRS without performing the LBT. For example, the preset duration can be 16us, or 25us.

In this embodiment, the method for using the different symbol numbers corresponding to the time domain symbol position of the SRS transmission is also applicable to the subframe level. For example, the number of OFDM symbols in the table is changed to the number of subframes, or the length of the time window, that is, the symbol index is replaced with the subframe index. Wherein, the symbol index is from 0 to 11 or 13, and the subframe index is from 0 to 9.

Or, for each of the OFDM symbol numbers (3, 6, 9, 10, 11, 12, 14) remaining in the downlink partial subframe, a correspondence table between the number of remaining symbols in the subframe and the SRS transmission time domain symbol position is determined. As shown in Table 2.

Table 2: Table for determining the symbol position of the SRS transmission based on the number of symbols remaining in the sub-frame of the downstream end

Another method is to independently formulate corresponding SRS transmission time domain symbol positions for different numbers of symbols (3, 6, 9, 10, 11, 12, 14) available in one subframe.

When 3 OFDM symbols are used, the transmission symbol position of the SRS is corresponding.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 3, the symbol positions at which the UE can transmit the SRS are as follows:

Table 3: Symbol positions corresponding to SRS transmissions when the number of symbols remaining in the subframe at the end of the downlink is 3

When 6 OFDM symbols are used, it corresponds to the transmission symbol position of the SRS.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 6, the symbol position at which the UE can transmit the SRS is as follows:

Table 4: Symbol positions corresponding to SRS transmissions when the number of symbols remaining in the sub-frame at the end of the downlink is 6.

When 9 OFDM symbols are used, the transmission symbol position of the SRS is corresponding.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 9, the symbol position at which the UE can transmit the SRS is as follows:

Table 5: Symbol positions corresponding to SRS transmission according to the number of symbols remaining in the sub-frame at the end of the downlink

When 10 OFDM symbols are used, the transmission symbol position of the SRS is corresponding.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 10, the symbol positions at which the UE can transmit the SRS are as follows:

Table 6: Symbol positions corresponding to SRS transmissions when the number of symbols remaining in the subframe at the end of the downlink is 10

When 11 OFDM symbols are used, the transmission symbol position of the SRS is corresponding.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 11, the symbol positions at which the UE can transmit the SRS are as follows:

Table 7: Symbol positions corresponding to SRS transmissions when the number of symbols remaining in the sub-frame at the end of the downlink is 11.

When 12 OFDM symbols are used, it corresponds to the transmission symbol position of the SRS.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 12, the symbol positions at which the UE can transmit the SRS are as follows:

Table 8 corresponds to the SRS transmission when the number of symbols remaining in the downlink end subframe is 12. Symbol position

When 14 OFDM symbols are used, the transmission symbol position of the SRS is corresponding.

Assuming that the number of OFDM symbols remaining in the last partial subframe of the end of the downlink transmission burst is 14, the symbol position at which the UE can transmit the SRS is as follows:

Table 9: Symbol positions corresponding to SRS transmissions when the number of symbols remaining in the sub-frame at the end of the downlink is 14.

Correspondence between the number of different OFDM symbols and the position of the candidate SRS transmission time domain symbol

In this part, the main method is to improve the SRS transmission opportunity, that is, the UE has at least one symbol position available for SRS transmission.

Among them, in the candidate SRS symbol position, there are two cases of transmitting SRS:

One is that the user equipment UE performs SRS transmission on one of the candidate SRS time domain symbol positions, and no longer performs SRS transmission on the remaining candidate time domain symbol positions.

That is, if the user equipment UE competes for the right to use the unlicensed carrier before the candidate SRS symbol position (ie, the LBT process is successfully completed according to the specific LBT mechanism, that is, the user is considered to compete for the use right of the unlicensed carrier), the UE is currently in the current The SRS is transmitted at the SRS symbol position. For the UE, the transmission is abandoned at the candidate other SRS symbol locations, or the candidate other SRS symbol locations are invalid for the UE.

Another is that the user equipment UE transmits the SRS on one of the candidate SRS time domain symbol positions, and the remaining candidate time domain symbol positions are still available to the UE.

That is, if the user equipment UE competes for the right to use the unlicensed carrier before the candidate SRS symbol position (ie, the LBT process is successfully completed according to the specific LBT mechanism, that is, the user is considered to compete for the use right of the unlicensed carrier), the UE is currently in the current The SRS is transmitted at the SRS symbol position. The other SRS symbol positions are also transmitted at the candidate. In an embodiment, if the candidate SRS symbol positions are consecutive in the time domain, the UE may directly transmit the candidate SRS time domain symbol positions without performing LBT. On the other hand, if the candidate SRS symbol position is discrete in the time domain, the UE still needs to perform the LBT mechanism before the transmission of the candidate SRS in the time domain symbol position (the LBT mechanism can be executed when the SRS has been successfully transmitted). The LBT mechanism is more simplified (for example, 25us LBT Cat2), or, with a smaller contention window and a value of n in the defer period), the access right of the unlicensed carrier can be obtained. The candidate time domain symbol position is transmitted. Alternatively, if the candidate SRS symbol positions are discrete in the time domain, the UE transmits a sparse occupancy signal on the blank symbol between the time domain symbol position of the successfully transmitted SRS and the next SRS time domain symbol position.

The correspondence between the defined number of different OFDM symbols and the position of the SRS symbol that the UE candidate can transmit is given below. It is also possible to formulate a general table in which the SRS transmission symbol positions corresponding to different symbols in one sub-frame can be queried. As shown in Table 10.

The following is the SRS transmission symbol position of the UE candidate for different OFDM symbol numbers.

When 3 OFDM symbols are used, the transmission symbol position of the SRS corresponding to the UE candidate.

Table 10: The transmission symbol position of the SRS corresponding to the UE candidate according to the number of symbols remaining in the downlink end subframe is 3.

When 6 OFDM symbols, the transmission symbol position of the SRS corresponding to the UE candidate.

Table 11: Transmission symbol positions of SRSs corresponding to UE candidates when the number of symbols remaining in the downlink end subframe is 6

The index number	Candidate SRS transmission symbol index
0	13
1	12
2	11
3	10
4	9
5	8
6	13,12
7	13,11
8	13,10
9	13,9
10	13,8
11	12,11
12	12,10
13	12,9
14	12,8
15	11,10
16	11,9
17	11,8
18	10,9

19	10,8
20	9,8
twenty one	13,12,11
twenty two	13,12,10
twenty three	13,12,9
twenty four	13,12,8
25	13,11,10
26	13,11,9
27	13,11,8
28	13,10,9
29	13,10,8
30	12,11,10
31	12,11,9
32	12,11,8
33	12,10,9
34	12,10,8
35	12,9,8
36	11,10,9
37	11,10,8
38	11,9,8
39	10,9,8
40	13,12,11,10
41	13,12,11,9
42	13,12,11,8
43	13,12,10,9

44	13,12,10,8
45	13,12,9,8
46	13,11,10,9
47	13,11,10,8
48	13,11,9,8
49	13,10,9,8
50	12,11,10,9
51	12,11,10,8
52	12,11,9,8
53	12,10,9,8
54	11,10,9,8
55	13,12,11,10,9
56	13,12,11,10,8
57	13,12,11,9,8
58	13,12,10,9,8
59	13,11,10,9,8
60	12,11,10,9,8
61	13,12,11,10,9,8

When 9 OFDM symbols are used, the transmission symbol position of the SRS corresponding to the UE candidate.

Table 12 shows the transmission symbol position of the SRS corresponding to the UE candidate according to the number of symbols remaining in the downlink end subframe.

Since the number of remaining symbols in one subframe is 9, or 10, or 11, 11, or 12, or 14 OFDM symbols, the number of transmission symbol positions of the SRS corresponding to the UE candidate is too large, and there is not one here. Listed. When there are 9, or 10, or 11, 11, or 12, or 14 OFDM symbols remaining in one subframe, the corresponding candidate SRS transmits the symbol position as above, and is also within the scope of protection of the present application.

In this embodiment, the established number of different OFDM symbols and the SRS transmission time domain location, or the candidate SRS transmission location correspondence table, the index number in the table and/or the table may be configured by higher layer RRC signaling, and/or, Physical layer DCI signaling configuration, and/or acquisition by the base station and the UE in a manner agreed upon in advance. The index number in the table and/or the table may also be configured to the UE by the cell-level public parameter, or the UE-level parameter may be configured to the UE.

The physical layer DCI signaling involved in the embodiment of the present invention includes:

UE-specific DCI signaling, for example, DCI format 0/4;

Public DCI signaling, for example, DCI format 1C;

Group downlink control information Group DCI signaling, for example, DCI format 3/3A;

Downlink downlink control information DL DCI signaling, for example, DCI format 1A/2B/2C/2D;

New DCI signaling, for example, in addition to the new format already available for DCI foramt;

If the index in the physical layer DCI signaling indication table is used, and/or the parameter that triggers the configuration of the upper layer RRC signaling is enabled, a field indicating the index number in the table may be introduced, and/or used to trigger the upper layer. The parameter enabled field of the RRC signaling configuration.

Example 2

In this embodiment, a method for instructing a UE to transmit an SRS in a sub-frame of a downlink transmission burst is provided.

The method for determining the time domain symbol position of the SRS transmission, or the candidate time domain symbol position of the SRS transmission, when the user equipment UE performs the SRS transmission in the downlink subframe of the downlink transmission burst, in this embodiment, includes:

Method 1: determining a time domain symbol position of the SRS transmission by using a corresponding index number in the table by using a corresponding relationship table between the number of different symbols and the time domain symbol position of the SRS transmission, or the candidate time domain symbol position of the SRS transmission, or Candidate time domain symbol location for SRS transmission.

among them,

The manner of obtaining the correspondence table between the number of different symbols and the time domain symbol position of the SRS transmission, or the candidate time domain symbol position of the SRS transmission, includes: the base station and the UE agree in advance; the upper layer RRC signaling configuration; or, the physical layer DCI Signaling configuration, or, in a predefined manner.

The index number is obtained, including: a high-level RRC signaling configuration index number; or a physical layer DCI signaling configuration index number; or a high-layer RRC signaling configuration index number, and an index of the upper layer RRC signaling configuration triggered by the physical layer DCI The first layer takes effect; or the upper layer RRC signaling configures the index number and takes effect after the downlink transmission burst ends the subframe; or the upper layer RRC signaling configures the index number and takes effect in the uplink transmission burst; or, the first physical layer DCI The SRS transmission is triggered, and the second physical layer DCI signaling configures an index number. The sub-frame number sent by the second physical layer DCI signaling of the index number and the specific timing relationship may determine the subframe position where the index number is valid.

Method 2: Determine the time domain symbol position of the SRS transmission by means of display, or the candidate time domain symbol position of the SRS transmission.

The way to display, including:

Configured by high-level RRC signaling, where:

Configuring a time domain symbol position of the SRS transmission, or a candidate time domain symbol position by high layer RRC signaling; or

The period and offset of the SRS transmission are configured by the upper layer RRC signaling (the basic unit of the period of the SRS transmission is a symbol), and the time domain symbol position of the transmitted SRS in one subframe is determined by the period and offset of the SRS transmission. Or, the candidate time domain symbol position of the SRS is transmitted; wherein the time domain symbol position of the SRS transmission or the subframe in which the candidate time domain symbol position is located may also be configured by high layer RRC signaling. or,

The time window length of the SRS transmission is configured by the upper layer RRC signaling, and/or the start position (symbol position, or time domain subframe position) of the SRS transmission time window, and/or, within the time window of the SRS transmission Offset, and/or SRS time domain resource interval in the time window of the SRS transmission (the SRS time domain resource may be a time domain symbol resource or a time domain subframe resource), and the information configured by the upper layer RRC determines the SRS transmission. Time domain symbol position, or candidate time domain symbol position. or,

Configuring high-frequency RRC signaling, configuring a start of a time domain symbol position of the SRS transmission, and/or a time domain symbol end position of the SRS transmission, and/or a time domain symbol interval of the SRS transmission, and/or a time domain of the SRS transmission The number of symbols determines the time domain symbol position of the SRS transmission, or the candidate time domain symbol position; or,

Configured by physical layer DCI signaling, where:

Physical layer DCI signaling (eg, UE-specific DCI signaling, eg, DCI format 0/4; or, common DCI signaling, eg, DCI format 1C; or, group downlink control information, Group DCI signaling, eg, DCI Format 3/3A; or downlink downlink control information DL DCI signaling, for example, DCI format 1A/2B/2C/2D; or, new DCI signaling, for example, a new format other than DCI foramt; Configuring a time domain symbol position of the SRS transmission, or a candidate time domain symbol position, wherein an SRS transmission is added in the physical layer DCI signaling. Field of time domain location or candidate time domain location; or,

Physical layer DCI signaling, configuring a time domain symbol start position of the SRS transmission, and/or a time domain symbol interval of the SRS transmission, and/or a number of time domain symbols of the SRS transmission determining a time domain symbol position of the SRS transmission, or , the candidate time domain symbol position; or,

Physical layer DCI signaling, configuring the period and offset of the SRS transmission (where the basic unit of the SRS transmission period is a symbol), and determining the time domain symbol position of the SRS transmitted in the subframe by the period and offset of the SRS transmission, Alternatively, the candidate time domain symbol position of the SRS is transmitted. The time domain symbol position of the SRS transmission, or the subframe in which the candidate time domain symbol position is located may also be configured by physical layer DCI signaling; or

Physical layer DCI signaling, configuring the time window length of the SRS transmission, and/or the starting position (symbol position, or time domain subframe position) of the SRS transmission time window, and/or, within the time window of the SRS transmission Offset, and/or SRS time domain resource interval in the time window of SRS transmission (SRS time domain resource may be time domain symbol resource, or time domain subframe resource), determined by information configured by physical layer DCI signaling The time domain symbol position of the SRS transmission, or the candidate time domain symbol position; or,

Configured by a combination of high-layer RRC signaling and physical layer DCI signaling, where:

The upper layer RRC signaling configures the time domain symbol position of the SRS transmission; or the candidate time domain symbol position; or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time window The starting position, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or, the start of the time domain symbol position of the SRS transmission, and/or The time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, and the message triggered by the physical layer DCI signaling to trigger the high layer RRC signaling configuration takes effect; or,

The upper layer RRC signaling configures the time domain symbol position of the SRS transmission; or the candidate time domain symbol position; or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time window The starting position, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or, the start of the time domain symbol position of the SRS transmission, and/or , the time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, through the physical layer DCI signaling The message triggering the configuration of the upper layer RRC signaling takes effect, and the SRS is triggered to perform one transmission, or multiple transmissions; or,

The upper layer RRC signaling configures the time domain symbol position of the SRS transmission; or the candidate time domain symbol position; or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time window The starting position, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or, the start of the time domain symbol position of the SRS transmission, and/or , the time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, within the uplink transmission burst, or at the end of the downlink transmission burst end Effective within the frame; or,

The upper layer RRC signaling configures the time domain symbol position of the SRS transmission; or the candidate time domain symbol position; or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time window The starting position, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or, the start of the time domain symbol position of the SRS transmission, and/or , the time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, triggering the SRS in the candidate time domain symbol position by the physical layer DCI signaling One transmission or N transmissions; or,

The upper layer RRC signaling configures the time domain symbol position of the SRS transmission; or the candidate time domain symbol position; or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time window The starting position, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or, the start of the time domain symbol position of the SRS transmission, and/or , the time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, triggering and/or configuring the time domain of the SRS transmission by physical layer DCI signaling Symbol position; or, candidate time domain symbol position; or, period and offset of SRS transmission; or, time window length of SRS transmission, and/or, starting position of SRS transmission time window, and/or SRS The offset within the time window of the transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or the start of the time domain symbol position of the SRS transmission, and/or the end of the time domain symbol of the SRS transmission, And/or, the time domain symbol interval of the SRS transmission, / Or the number of the SRS transmission time domain symbol. or,

Configured by N physical layer DCI signaling combination, where:

The first physical layer DCI signaling configures the symbol position of the SRS transmission, or the candidate time domain symbol position, or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time The starting position of the window, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource interval within the time window of the SRS transmission; or, the start of the time domain symbol position of the SRS transmission, and / Or, the time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, the second physical layer DCI signaling triggering the first physical layer DCI signaling The configured information takes effect; or,

The first physical layer DCI signaling triggers the SRS transmission, the second physical layer DCI signaling configures the symbol position of the SRS transmission, or the candidate time domain symbol position, or the period and offset of the SRS transmission; or, the SRS transmission The length of the time window, and/or the starting position of the SRS transmission time window, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource spacing within the time window of the SRS transmission; or The start of the time domain symbol position of the SRS transmission, and/or the time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission; or

The physical layer DCI signaling configures the symbol position of the SRS transmission, or the candidate time domain symbol position, or the period and offset of the SRS transmission; or the time window length of the SRS transmission, and/or the SRS transmission time window a starting location, and/or an offset within a time window of the SRS transmission, and/or an SRS time domain resource interval within a time window of the SRS transmission; or, a start of a time domain symbol position of the SRS transmission, and/or, The time domain symbol end position of the SRS transmission, and/or the time domain symbol interval of the SRS transmission, and/or the number of time domain symbols of the SRS transmission, the message of the physical layer DCI signaling configuration is at the end of the downlink transmission burst end subframe Or, the uplink transmission burst is valid.

Method 3: Determine the time domain symbol position of the SRS transmission in an implicit manner, or the candidate time domain symbol position of the SRS transmission.

Determining, according to the number of remaining symbols in the end portion of the downlink transmission burst, the symbol position of the transmitted SRS, or the candidate time domain symbol position, or the period and offset of the SRS transmission; or, the time window of the SRS transmission Length, and/or, the starting position of the SRS transmission time window, and/or the offset within the time window of the SRS transmission, and/or the SRS time domain resource spacing within the time window of the SRS transmission; or, SRS transmission The start of the time domain symbol position, and / or the end of the time domain symbol of the SRS transmission, and / or the time domain symbol interval of the SRS transmission, and / or, SRS transmission The number of time domain symbols lost. For example, when the number of remaining symbols in the subframe at the end of the downlink transmission burst is 6, it is implicitly determined that the symbol position of the SRS transmission is: symbol index #13 or symbol index #12 or symbol index #11 or symbol index #10, or the like, or The time domain symbol position implicitly determining the candidate is: symbol index #13, symbol index #11, symbol index #9 or symbol index #10, symbol index #12, or implicitly determining the period and offset of the SRS transmission. The amount thus determines the SRS symbol position, or the candidate time domain symbol position, for example, for 6 symbols, the time domain symbol positions determined by period 2 and offset 2 are 10 and 12. Wherein, the period is less than the number of symbols, and the offset is less than or equal to 0, and is greater than or equal to the number of symbols. Here, the number of symbols may be the number of symbols remaining in the subframe at the end of the downlink transmission burst. Alternatively, the time domain symbol start position of the SRS transmission is implicitly determined. For example, for 6 symbols, the time domain symbol start position of the SRS transmission is a symbol index of 10. Wherein, there is an offset between the number of remaining symbols and the start position of the time domain symbol of the SRS transmission, and the offset of the time domain symbol of the initial SRS transmission is determined by the offset, and the offset may be the base station and the UE. Prior agreement, or high-level RRC signaling configuration, or physical layer DCI signaling configuration.

In addition, a method for determining a time domain subframe position or a candidate time domain subframe position to which a time domain symbol position or a candidate time domain symbol position of the SRS is transmitted includes:

Solution 1: Configuration through high-level RRC signaling. among them,

Determining a time domain subframe position or a candidate time domain subframe position by using high layer RRC signaling to configure parameters for SRS transmission; or

The parameters for SRS transmission configured by the upper layer RRC signaling are effective immediately upon configuration; or,

The parameters for SRS transmission configured by the upper layer RRC signaling are valid during the uplink transmission burst;

The parameters for SRS transmission include at least one of the following: period, offset, transmission comb, cyclic shift, symbol index of LBT, time domain pattern of SRS transmission, time window of SRS transmission, time window offset Shift, time window interval, start position of SRS transmission time window, one transmission, multiple transmission.

Solution 2: Configuration through physical layer DCI signaling. among them,

The physical layer DCI signaling that triggers the SRS transmission is sent on the subframe n, and the time domain subframe position or the candidate time domain subframe position is determined according to a predetermined timing relationship;

The physical layer DCI signaling carries a field indicating a time domain subframe position or a candidate time domain subframe position, and determines a time domain subframe position or a candidate time domain subframe position according to the field.

The predetermined timing relationship includes: n+k; or, n+k1; k is a positive integer greater than or equal to 4; and k1 is a positive integer greater than or equal to zero. The k or k1 may be obtained by at least one of the following methods: a high layer RRC signaling configuration; a physical layer DCI signaling indication; and a base station and a UE pre-agreed mode.

Solution 3: A combination of high-level RRC signaling and physical layer DCI signaling. among them,

The high-layer RRC signaling configures parameters for SRS transmission, and the parameters for the SRS transmission configured by the physical layer DCI signaling triggering the high-layer RRC signaling are valid;

The high layer RRC signaling configures at least one of parameters for SRS transmission, and the physical layer DCI signaling configures parameters of the unconfigured SRS transmission of the upper layer RRC signaling;

The high-layer RRC signaling configures at least one of the parameters for the SRS transmission, and the physical layer DCI signaling carries a field indicating a time domain subframe position or a candidate time domain subframe position of the SRS transmission, and is determined according to the field for the SRS. The time domain subframe position of the transmission or the candidate time domain subframe position;

The high layer RRC signaling configures at least one of parameters for SRS transmission, the physical layer DCI signaling triggers the SRS transmission and/or determines the time domain subframe position or the candidate time domain subframe position for the SRS transmission according to a predetermined timing relationship. ;

The parameters for SRS transmission include at least one of the following: period, offset, transmission comb, cyclic shift, symbol index of LBT, time domain pattern of SRS transmission, time window of SRS transmission, time window offset Shift, time window interval, start position of SRS transmission time window, one transmission, multiple transmission.

Solution 4: A method of combining DC physical signaling by N times. among them,

The time domain subframe position or the candidate time domain subframe position of the SRS transmission is configured by the first physical layer DCI signaling, and the information of the first physical layer DCI signaling configuration is enabled by the second physical layer DCI signaling, and/or Triggering SRS transmission by using a second physical layer DCI signaling;

SRS transmission triggered by the first physical layer DCI signaling, indicated by the second physical layer DCI signaling a time domain subframe position or a candidate time domain subframe position of the SRS transmission;

SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is determined according to a predetermined timing relationship by using the second physical layer DCI signaling;

Determining a time domain subframe position or a candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship by the first physical layer DCI signaling, triggering the SRS transmission by the second physical layer DCI signaling, and/or passing the second physical layer The DCI signaling triggers the time domain subframe position or the candidate time domain subframe position enable of the SRS transmission determined by the first physical layer DCI signaling.

Option 5: Through implicit means. among them,

After the downlink transmission burst ends, and/or, the SRS parameter configured by the upper layer RRC signaling or the time domain subframe position or the candidate time domain subframe position of the SRS transmission explicitly indicated by the physical layer DCI signaling is enabled in the uplink transmission burst, where The parameters of the SRS transmission include at least one of the following: a period, an offset, a transmission comb, a cyclic shift, a symbol index of the LBT, a time domain pattern of the SRS transmission, a time window of the SRS transmission, and an offset within the time window. Time window interval, the starting position of the SRS transmission time window, one transmission, multiple transmissions;

The last partial subframe after the downlink transmission burst;

After the downlink transmission burst, the first uplink subframe;

After the downlink transmission burst, the second uplink subframe;

After the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an even-numbered subframe;

After the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an odd-numbered subframe;

The first uplink subframe in the uplink transmission burst;

The second uplink subframe in the uplink transmission burst;

The uplink subframe index in the uplink transmission burst is an even-numbered subframe;

The uplink subframe index in the uplink transmission burst is an odd-numbered subframe.

In addition, the foregoing configuration signaling (eg, high-layer RRC signaling, physical layer DCI signaling) may also simultaneously configure a time domain subframe or a candidate subframe of the SRS transmission and/or configure a time domain of the SRS transmission. Symbol position or candidate time domain symbol position.

The time domain subframe position or the candidate time domain subframe position of the SRS transmission and/or the time domain symbol position or the candidate time domain symbol position of the SRS transmission may be triggered and/or determined by N physical layer DCI signaling manners. N may be a positive integer greater than or equal to 1, for example, N is 2. The N may have physical layer DCI signaling, or RRC signaling configuration, or the base station and the UE agree in advance, or obtain or determine in a predefined manner.

The SRS transmission may be triggered by the physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission may be determined by the secondary physical layer DCI signaling (eg, the common DCI signaling, that is, the DCI format 1C). And/or, the time domain symbol position of the SRS transmission or the candidate time domain symbol position. or,

The SRS transmission may be triggered by the physical layer DCI signaling, and the time domain subframe position of the trigger signaling subframe and the SRS transmission or the candidate time domain subframe position is determined according to a specific timing relationship, and the secondary physical layer is adopted. The DCI signaling (e.g., the common DCI signaling, DCI format 1C) configures the time domain symbol location or the candidate time domain symbol location of the SRS transmission.

The SRS transmission may be triggered by physical layer DCI signaling and indicate the time domain subframe position of the SRS transmission or the candidate time domain subframe position, and the secondary physical layer DCI signaling (eg, common DCI signaling, ie DCI format 1C) ) Configure the time domain symbol position of the SRS transmission or the candidate time domain symbol position.

The physical layer DCI signaling in the embodiment of the present invention includes one of the following: UE-specific DCI signaling, for example, DCI format 0/4; or common DCI signaling, for example, DCI format 1C; or group downlink control information. Group DCI signaling, for example, DCI format 3/3A; or downlink downlink control information DL DCI signaling, such as DCI format 1A/2B/2C/2D; or, new DCI signaling, for example, except a new format other than the DCI foramt; that is, an SRS time domain subframe, or a candidate SRS time domain subframe field may be added in the physical layer DCI signaling, and/or a time domain symbol position indicating the SRS transmission may be added, or a candidate SRS time domain symbol location field, and/or a field for triggering the SRS to perform a transmission, or multiple transmissions, and/or a field to increase the k value indicating the timing relationship. In an embodiment, it is also possible to increase the transmission comb field of the configuration SRS transmission, and/or cyclic shift.

The above method will be described in further detail below:

The index number is configured by the upper layer RRC, and the physical layer DCI signaling triggers the SRS transmission.

The SRS time domain transmission location corresponding to the high-level RRC signaling configuration index number or the candidate time domain location of the SRS transmission includes two types: one is effective immediately after the high-layer RRC signaling configuration; and the other is through the physical layer DCI signaling. Trigger it to take effect.

The index number corresponding to the SRS time domain transmission location of the high layer RRC signaling configuration is the index in the table defined in Embodiment 1.

In an embodiment, the physical layer DCI signaling that triggers the SRS transmission determines the time domain subframe position of the SRS transmission according to the n+k timing relationship in the subframe n, or the time domain subframe set location of the SRS transmission, or The position of the subframe where the index number is in effect. Where k can be a positive integer, or k can be a positive integer set. k may be a positive integer greater than or equal to 0, or a positive integer greater than or equal to 4, or k is 0, and/or, 1, and/or, 2, and/or, 3, and/or 4, and / or, 5, and / or, 6, and / or, 7, or, k is a set, such as {1,2,3,4,5,6,7,8}.

Physical layer DCI signaling, including: UE-specific DCI signaling (eg, format 0/4 signaling); or, common DCI signaling (eg, format 1C); or, group (group) DCI signaling (eg, Format 3/3A); or, DL grant (eg, format 1A/2B/2C) signaling.

To facilitate understanding of the first method, by way of example:

Example 1: The RRC signaling configuration table 1 has the sequence number 3 (that is, the position of the OFDM symbol index number 13 in the high-layer RRC configuration subframe is the SRS transmission time domain symbol position). The SRS is transmitted over the physical layer DCI signaling on which time domain subframes, or by configuring the time domain location of the SRS transmission by using higher layer RRC signaling.

If the physical layer DCI signaling of the SRS transmission is triggered, such as UE-specific DCI signaling (eg, format 0/4 signaling), or group DCI signaling (eg, format 3/3A), or DL grant (eg, , format 1A/2B/2C) signaling is transmitted in subframe n, and the time domain position of the SRS transmission is determined according to the timing relationship of n+k1 (where k1 is 4) in the LTE protocol. Further, the SRS transmission time domain subframe determined according to the n+k1 timing relationship is the last partial subframe of the downlink transmission burst end, and the physical layer DCI signaling that triggers the SRS transmission should be at the end of the downlink transmission burst end subframe. Start, send on the forward k1 subframes. FIG. 3 is a schematic diagram of determining a time domain subframe position of an SRS transmission according to a timing relationship n+k according to an embodiment of the present invention. As shown in FIG. 3, in order to ensure that an SRS is transmitted on a subframe at the end of a downlink transmission burst, Schematic diagram of a subframe transmitted by DCI signaling that triggers SRS transmission.

As shown in FIG. 3, the DCI signaling for triggering the SRS transmission in the LTE protocol is transmitted in the subframe n, and the time domain subframe position of the SRS transmission is determined according to the n+4 timing relationship. In an implementation manner, the uplink RRC signaling is configured. The SRS transmits the symbol position, and the UE transmits the SRS on the symbol position in the time domain subframe of the SRS transmission. The premise is that the LBT mechanism is performed before the SRS symbol position, and if the UE performs the LBT successfully before the SRS symbol position, the UE is in the SRS. The SRS is transmitted on the symbol. Conversely, if the UE fails to perform LBT before the SRS symbol position, the UE does not transmit the SRS on the SRS symbol. Alternatively, the UE does not perform LBT before the SRS symbol position, as long as the gap between the downlink transmission burst end position and the SRS symbol position is not greater than 16 us, or 25 us. If the subframe where the symbol position of the SRS transmission is located in the MCOT (the MCOT can be regarded as the downlink transmission burst+uplink transmission burst, or the MCOT considers it to be an independent downlink transmission burst, or the MCOT considers it to be an independent uplink transmission burst), then The 25-times Cat2LBT is executed before the time domain symbol of the SRS transmission. If the subframe where the symbol position of the SRS transmission is located in the MCOT (the MCOT can be regarded as the downlink transmission burst+uplink transmission burst, or the MCOT considers it to be an independent downlink transmission burst, or the MCOT considers it to be an independent uplink transmission burst), or The first subframe located within the MCOT performs Cat4LBT before the time domain symbol or subframe of the SRS transmission. You can configure a higher priority LBT priority, for example, priority level 1 (for example, the maximum contention window is 5, the minimum contention window 0, n in the defer period is 0, or 1, 1, or 2), or, priority Level 2 (eg, the maximum contention window is 7, the minimum contention window 3, n in the defer period is 0, or, 1, or 2). In an embodiment, the priority of the uplink signal or channel is: SRS>PUSCH+SRS>PUSCH. Alternatively, the parameter n in the LBT mechanism, and/or the random backoff value N is configured by physical layer DCI signaling, or higher layer RRC signaling.

Another case: if physical layer DCI signaling for SRS transmission is triggered, such as UE-specific DCI signaling (eg, format 0/4 signaling), or group DCI signaling (eg, format 3/3A), Alternatively, a DL grant (eg, format 1A/2B/2C) signaling, or a common DCI signaling (eg, format 1C) is transmitted in subframe n, according to a new n+k (where k is greater than or equal to 0, Or The k is a positive integer greater than or equal to 4) timing relationship, and the time domain position of the SRS transmission is determined. Where k is 0, 1, 2, 3, 4, 5, 6, and the like. A k of 0 indicates that DCI signaling for triggering the SRS transmission is transmitted on the subframe n, and it is determined that the subframe of the SRS transmission is also the subframe n. If k is 1, it means that the DCI signaling that triggers the SRS transmission is sent on the subframe n, and the SRS transmission is determined to be on the subframe n+1 according to the n+1 relationship. At this time, which symbol in the determined SRS transmission time domain subframe is transmitted by the UE is determined by the upper layer RRC signaling. 4 is a first schematic diagram of determining a time domain subframe position of an SRS transmission according to a timing relationship n+k1 according to an embodiment of the present invention; FIG. 5 is a method for determining an SRS according to a timing relationship n+k1 according to an embodiment of the present invention; A second schematic diagram of the time domain subframe position of the transmission; as shown in FIG. 4, or as shown in FIG.

Example 2: Example 2 differs from Example 1 in that the UE has multiple candidate SRS transmission time domain symbol positions. Assume that the sequence number 174 in the high-layer RRC signaling configuration table 12 (ie, the position of the OFDM symbol index number in the high-layer RRC configuration subframe is 13, 10, 6, 5 is the candidate SRS transmission time domain symbol position). The SRS is transmitted over the physical layer DCI signaling on which time domain subframes, or by configuring the time domain location of the SRS transmission by using higher layer RRC signaling. Wherein, physical layer DCI signaling that triggers SRS transmission, such as UE-specific DCI signaling (eg, format 0/4 signaling), or group DCI signaling (eg, format 3/3A), or DL grant (eg, format 1A/2B/2C) signaling, or common DCI signaling (eg, format 1C) is transmitted in subframe n, which determines the timing relationship of the time domain location of the SRS transmission, which may be in accordance with the existing n+ 4, or, according to the new n + k (where k is greater than or equal to 0, or, k is a positive integer greater than or equal to 4) timing relationship, the method is the same as the example 1.

In an embodiment, in the candidate SRS transmission time domain symbol position, if the UE performs LBT success before the first candidate symbol position, the UE transmits the SRS on the first symbol position. Conversely, if the UE performs LBT failure before the first candidate symbol position (LBT mechanism LBTCat4, and the maximum contention window is 5, the minimum contention window is 1, n is 1 in the defer period. Or, the LBT mechanism is 25us Cat2) Then, the UE abandons the transmission of the SRS at the first symbol position. Continue to attempt to perform LBT before the next candidate SRS symbol position (this time the LBT mechanism performed before the next candidate SRS symbol position may be the same as the LBT mechanism performed before the previous SRS symbol position, or before the previous SRS symbol position) The LBT mechanism is more simplified, or the LBT mechanism or parameters of the faster access channel (LBT mechanism LBT Cat4, and the largest competition) The contention window is 3, the minimum contention window is 0, n is 0 in the defer period, or 1, or the LBT mechanism is 25us Cat2)). If the LBT is successful, the UE transmits on the current SRS symbol. Conversely, the LBT fails and the UE continues to attempt to perform LBT before the next SRS symbol position. Repeat the above method. The UE successfully transmits the SRS on one of the candidate SRS symbols, and the symbol position of the other candidate transmission SRS is invalid for the UE, or the UE continues to perform the LBT before the candidate SRS symbol position, and the LBT succeeds. Next, send the SRS.

In addition, due to the symbol position of the SRS transmission, or the symbol position of the candidate SRS transmission is configured by the upper layer RRC, at least one of the SRS transmission symbol positions determined by the configuration may be a symbol in the downlink partial subframe, or the UE A side LBT failure causes the configured SRS symbol location to be undeliverable. This limits the chances of SRS transmission in partial subframes to some extent.

Manner 2: The physical layer DCI signaling triggers the SRS transmission, and notifies the symbol position of the SRS transmission, or the candidate SRS transmission symbol position.

The SRS transmission time domain subframe is determined by DCI signaling, or the SRS transmission time domain subframe collection location passes a specific timing relationship. The specific timing relationship includes one of the following: an n+4 timing relationship in the LTE protocol; or, according to a new definition relationship n+k. Where k is greater than or equal to 0, or k is a positive integer greater than or equal to 4, for example, k is 0, 1, 2, 3, 4, 5, 6, and the like. The time domain subframe position of the SRS transmission is determined by the timing relationship, or the candidate SRS transmits the symbol position in the same manner as in the first method. The parameter k in a specific timing relationship may be determined by physical layer DCI signaling, or higher layer RRC signaling.

The difference from the method one is that the base station notifies which of the time domain subframes transmitted by the UESRS through the DCI signaling, or which symbols transmit the SRS. The base station only needs to notify the sequence index number in the table in the embodiment to know the time domain symbol position of the SRS transmission, or the candidate SRS transmission time domain symbol position.

For mode 2, the base station can know the number of symbols remaining in the subframe at the end of the downlink transmission burst, so that the UE can be notified from the table in Embodiment 1 of the SRS transmission symbol position corresponding to the number of remaining symbols, or the candidate SRS transmission symbol. position.

Manner 3: The physical layer DCI signaling triggers the SRS transmission, and the number of remaining symbols acquired by the UE through the checked common DCI implicitly determines the time domain symbol position of the SRS transmission, or the time domain symbol position of the candidate SRS transmission.

For mode 3, the SRS transmission can be triggered by one physical layer DCI signaling, and the time domain subframe position of the SRS transmission, or the candidate SRS transmission time domain subframe position can still be determined by a specific timing relationship. Among them, the specific timing relationship is one of the following:

n+4 timing relationship in the LTE protocol; or,

According to the new definition relationship n + k.

Where k is greater than or equal to 0, or k is a positive integer greater than or equal to 4, for example, k is 0, 1, 2, 3, 4, 5, 6, and the like. The time domain subframe position of the SRS transmission is determined by the timing relationship, or the candidate SRS transmits the symbol position in the same manner as in the first method. The parameter k in a specific timing relationship may be determined by physical layer DCI signaling, or higher layer RRC signaling.

Further, the symbol position of the UE transmitting the SRS in the downlink end subframe may be implicitly determined according to the number of remaining symbols known by the common DCI signaling checked by the UE, or determined in a predefined manner, or the base station and the UE Determined in advance by way of agreement.

Implicitly determining the symbol position of the transmitted SRS, including one of the following: the last symbol in the last part of the downlink transmission burst, or the second to last symbol in the last part of the downlink transmission burst, or downlink transmission The first symbol in the subframe at the end of the burst, or the second symbol in the subframe at the end of the downlink transmission burst, or the third symbol in the subframe at the end of the downlink transmission burst, or One symbol, or the symbol index in the last partial subframe of the downlink transmission burst is an even symbol, or the symbol index in the last partial subframe of the downlink transmission burst is an odd symbol, or a specific symbol set.

A specific symbol, or a specific symbol set, may be previously agreed by the base station and the UE, or a predefined manner, or a high layer RRC configuration, or a physical layer DCI notification.

For example, when there are three remaining symbols in the last partial subframe of the downlink transmission burst, the UE may implicitly determine the last one of the remaining three symbols, or the first symbol, or the second, according to the remaining three symbols. The symbols, or the first symbol and the third symbol, or the second symbol and the third symbol are the time domain symbol positions of the SRS transmission.

Manner 4: The first physical layer DCI signaling triggers the SRS transmission, and the second physical layer DCI indicates the sequence index of the SRS transmission.

The first physical layer DCI signaling only triggers the SRS transmission but passes through the second physical layer. The DCI determines the time domain subframe or candidate time domain subframe position of the SRS transmission, and, the symbol position of the SRS transmission, or the candidate SRS transmission symbol position. 6 is a first DCI signaling trigger SRS transmission according to an embodiment of the present invention. The second DCI signaling is determined according to an n+k or n+k1 timing relationship, and the time domain subframe position and/or SRS transmission time of the SRS transmission is determined according to an n+k or n+k1 timing relationship. A schematic diagram of the location of the domain symbol, as shown in Figure 6.

The time domain subframe sent by the first physical layer DCI signaling is located before the second physical layer DCI signaling transmission time domain subframe position. In an embodiment, the time domain subframe sent by the first physical layer DCI signaling may also be located after the second physical layer DCI signaling transmission time domain subframe position. That is to say, the former triggers the SRS transmission first, and the time domain subframe position of the SRS transmission, or the time domain subframe position of the candidate SRS transmission, and the sequence index number of the SRS transmission are notified by the secondary physical layer DCI. Give the UE. The sequence index of the SRS transmission is the sequence index number in the table in Embodiment 1. The latter firstly informs the UE through a physical layer DCI signaling to determine the time domain subframe position of the SRS transmission according to a specific timing relationship, or the time domain subframe position of the candidate SRS transmission, and the sequence index number of the SRS transmission. And the second physical layer DCI signaling triggers the time domain subframe position of the SRS transmission configured by the first physical layer DCI signaling, or the time domain subframe position of the candidate SRS transmission, and the sequence index of the SRS transmission The number is enabled.

In addition, in another case, the first physical layer DCI signaling, and/or the second physical layer DCI signaling may determine a time domain subframe or a candidate time domain subframe position of the SRS transmission by using a specific timing relationship. The specific timing relationship is one of the following: an n+4 timing relationship in the LTE protocol; or, according to a new definition relationship n+k. k is greater than or equal to 0, or k is a positive integer greater than or equal to 4, for example, k is 0, 1, 2, 3, 4, 5, 6, and the like. The time domain subframe position of the SRS transmission is determined by the timing relationship, or the candidate SRS transmits the symbol position in the same manner as in the first method. The parameter k in a specific timing relationship may be determined by physical layer DCI signaling, or higher layer RRC signaling.

7 is a first DCI signaling triggering SRS transmission according to an embodiment of the present invention, and indicating a time domain subframe position of an SRS transmission according to an n+k timing relationship, where the second DCI signaling determines an SRS transmission according to an n+k1 timing relationship. Schematic diagram of the time domain symbol position, as shown in FIG. 7, the first physical layer DCI signaling determines the time domain subframe of the SRS transmission or the candidate time domain subframe position, and the second physical layer DCI indicates the symbol position of the SRS transmission. Or, the candidate SRS transmits the symbol position.

Manner 5: The first physical layer DCI signaling triggers SRS transmission, and the second physical layer DCI indicates UE Determining a time domain subframe or a candidate time domain subframe position of the SRS transmission according to a specific timing relationship, a symbol position of the SRS transmitted by the UE in the end portion of the downlink burst, or a symbol position of the candidate transmission SRS may be detected by the UE. The number of remaining symbols learned by the public DCI signaling is implicitly determined.

The triggering of the SRS transmission according to the first physical layer DCI signaling means that the UE can transmit the SRS in the SRS transmission time domain subframe after receiving the triggering SRS transmission signaling. The time domain subframe or the candidate time domain subframe position of the SRS transmission is determined by the second physical layer DCI signaling according to a specific timing relationship.

a specific timing relationship, and, according to the number of symbols remaining in the subframe at the end of the downlink transmission burst, implicitly determining the time domain symbol position of the SRS transmission, or the method of the candidate time domain symbol location is the same as in the other methods in this embodiment. method.

Manner 6: triggering and explicitly notifying the time domain subframe of the SRS transmission or the candidate time domain subframe position by the physical layer DCI signaling, and/or transmitting the symbol position of the SRS or the symbol position of the candidate transmission SRS.

Among them, there are two cases for mode six:

Case 1: The physical layer DCI signaling explicitly informs the time domain subframe of the SRS transmission or the candidate time domain subframe position and the symbol position of the SRS in the SRS transmission subframe, or the symbol position of the candidate transmission SRS.

Case 2: The time domain subframe or the candidate time domain subframe position of the SRS transmission is triggered and explicitly notified by the physical layer DCI signaling, and the symbol position of the SRS in the downlink subframe at the end of the downlink burst, or the candidate transmission SRS The symbol position is implicitly determined by detecting the number of remaining symbols by detecting the common DCI signaling.

The method of implicitly determining the time domain symbol position of the SRS transmission, or the candidate time domain symbol position, is the same as the method in the other methods in this embodiment.

Method 7: triggering SRS transmission by physical layer DCI signaling, determining a time domain subframe or a candidate time domain subframe position of the SRS transmission by an implicit manner, and/or transmitting a symbol position of the SRS, or a candidate transmission SRS Symbol location.

For method 7, the implicit manner determines the time domain subframe of the SRS transmission or the candidate time domain subframe position, and/or the symbol position of the transmission SRS includes: a downlink subframe at the end of the downlink transmission, and/or a downlink transmission burst After the first uplink subframe, and/or, after the downlink transmission burst, the second a subframe, and/or a subframe in which an uplink subframe index number after the downlink transmission burst is an even number, and/or an uplink subframe index number after the downlink transmission burst is an odd subframe, or first The uplink subframe, and/or the second uplink subframe, and/or the subframe in which the uplink subframe index number is an even number, and/or the subframe in which the uplink subframe index number is an odd number. The uplink subframe index number after the downlink transmission burst is an even-numbered subframe, and/or the uplink subframe index number after the downlink transmission burst is an odd-numbered subframe, and/or the uplink subframe index number is The even-numbered subframes, and/or the number of subframes corresponding to the odd-numbered subframe index numbers, are related to M. Wherein, M is a subframe corresponding to an even subframe index of the downlink transmission burst, and/or a subframe corresponding to an odd subframe index of the uplink transmission burst, and/or an uplink subframe index The number is an even-numbered subframe, and/or the number of subframes in which the uplink subframe index number is an odd number. M may be configured by high-layer RRC signaling, or physical layer DCI signaling, or the base station and the UE may reserve in advance, or may be determined in a predefined manner.

The method of implicitly determining the time domain symbol position of the SRS transmission, or the candidate time domain symbol position, is the same as the method in the other methods in this embodiment.

The time domain subframe position of the SRS transmission is determined by one of the above methods, and/or the time domain symbol position of the SRS transmission. Further, different UEs may configure the same SRS transmission symbol position, or the candidate SRS transmission symbol position. For different UEs to transmit on the same SRS time domain symbol, they can be multiplexed in the same symbol by cyclic shifting, and/or transmission combing. Cyclic shifts employed by different UEs, and/or transmission combs may be configured by higher layer RRC signaling, and/or physical layer DCI signaling. Among them, the cyclic shift value range [0~7], or [0, s1], the transmission comb tooth value range is [0, 1], or, [0, 3], or, [0, s2] . Where s1 is a positive integer greater than or equal to 7. S2 is a positive integer greater than or equal to 3.

The physical layer DCI signaling in the embodiment of the present invention includes: UE-specific DCI signaling (for example, format 0/4 signaling); or, common DCI signaling (for example, format 1C); or, group DCI signaling. (eg, format 3/3A); or, DL grant (eg, format 1A/2B/2C) signaling. Again, it is stated that in other embodiments, one of the following may be directly represented by physical layer DCI signaling: UE-specific DCI signaling (eg, format 0/4 signaling); or, public DCI signaling (eg, Format 1C); or, group DCI signaling (eg, format 3/3A); or DL grant (eg, format 1A/2B/2C) signaling.

Example 3

In this embodiment, a method for transmitting SRS on different SRS symbol positions, or the same SRS symbol position, or the same candidate SRS symbol position is provided.

Case 1: A method in which the UE transmits an SRS for the case where the same one SRS symbol position is configured for different UEs.

For case 1, it is assumed that when the remaining symbols in the subframe at the end of the downlink transmission burst are 6, the SRS transmission symbol is the last symbol of the remaining 6 symbols (eg, symbol index #13), and the manner of SRS transmission includes one of the following:

Manner 1: Different UEs perform LBT before the SRS symbol position and introduce a self-delay mechanism. Among them, the self-delay can be in the LBT mechanism, or at the end of the LBT mechanism. 8 is a schematic diagram of introducing a self-delay operation in an LBT mechanism when different UEs configure time-domain symbol positions of the same SRS transmission according to an embodiment of the present invention. As shown in FIG. 8, different UEs may be configured with the same LBT mechanism. And/or, a collection of LBT parameters. For example, UE1 and UE2 configure the same LBT Cat4 mechanism with a random backoff value of N, n in the defer period. The self-delay mechanism may be that the UE detects that the N value is decremented to 1 and starts from the delay until the SRS symbol, and the 9s before the SRS symbol can transmit the SRS in the SRS symbol as long as the UE detects the channel idle. Alternatively, the self begins to perform a self-delay after the delay of the value of N decreases to zero. The minimum granularity of the self-delay is 9 us, that is, the self-delay time domain length is an integer multiple of 9 us, or is an integer multiple of the specific CCA (Clear Channel Assessment) duration. The specific CCA duration can be 16us, or 25us.

In addition, different UEs may use Cat2LBT to perform multiple CCA durations between the downlink transmission burst end symbol position and the SRS symbol position. The number of times the CCA duration is executed is equal to the value of the downlink transmission burst end symbol position to the SRS symbol position duration divided by the CCA duration. The downlink transmission symbol position to the SRS symbol position duration is not an integer multiple of the CCA duration, and the UE performs a CCA detection of the remaining duration for the remaining duration, and the CCA duration is the remaining duration. The CCA duration can be 16us, or 25us, or 34us, or 43us.

In an embodiment, when the gap between the downlink transmission burst end time and the symbol position of the SRS transmission is not greater than 16 us, or 25 us, the UE may directly send the SRS without performing the LBT mechanism.

Manner 2: Remaining symbol structure in the downlink sub-frame: CCA gap1+ occupation signal + CCA gap2+SRS. The occupant signal may be a format 4 PRACH (Physical Random Access Channel) or a truncated PRACH, or may be a PUCCH (Physical Uplink Control CHannel). In an embodiment, at least one of CCA gap1 and CCA gap2 is in the remaining symbol structure. FIG. 9 is a schematic diagram of a time domain structure in a subframe at the end of a downlink transmission burst according to an embodiment of the present invention. As shown in FIG. 9, when the downlink transmission burst end time reaches the start of the occupation signal, the gap is not greater than 16 us, or 25 us. The UE may directly transmit the occupation signal without performing the LBT mechanism. In an embodiment, the occupied signals sent by different UEs may be multiplexed by frequency division, or may be multiplexed by code division by using different cyclic shift modes. That is, CCA gap1 can be omitted. Further, different UEs may use the same LBT mechanism in CCA gap2, and/or the LBT parameter set for channel access.

In addition, different UEs are configured with the same SRS symbol position, wherein different UEs may transmit different cyclic shifts and/or different transmission combs in the same SRS symbol. Cyclic shifts employed by different UEs, and/or transmission combs may be configured by higher layer RRC signaling, and/or physical layer DCI signaling. Among them, the cyclic shift value range [0~7], or [0, s1], the transmission comb tooth value range is [0, 1], or, [0, 3], or, [0, s2] . Where s1 is a positive integer greater than or equal to 7. S2 is a positive integer greater than or equal to 3.

Case 2: A method in which the UE transmits an SRS for a different one of the SRS symbol position cases for different UEs.

Here, the remaining symbols in the following row transmission burst are taken as an example to illustrate that different UEs are configured with different SRS symbol positions in the remaining symbols in the subframe at the end of the downlink transmission burst. FIG. 10 is a schematic diagram of different SRS transmission time domain symbols configured by different UEs in a downlink subframe of a downlink transmission burst according to an embodiment of the present invention. As shown in FIG. 10, different UEs configure different SRS symbol positions, and different UEs. The location where the CCA is executed is a symbol before the SRS symbol position, or the first P symbols. P is a symbol greater than or equal to 1, and is smaller than the number of remaining symbols of the sub-frame at the end of the downlink transmission burst minus a specific value. The special value may be 1, 2, 3, 4, 5 or the number of symbols of the SRS in the subframe at the end of the downlink burst.

Where different UEs configure different SRS symbol positions, in one embodiment, different SRSs Different UEs of symbol locations may be configured with different transmission combs, and/or, cyclically shifted, or configured with the same transmission combs, and/or cyclically shifted. Different UEs within the same SRS symbol location may be configured with different transmission combs, or cyclic shifts. The cyclic shift, and/or the transmission comb can be configured by higher layer RRC signaling, and/or physical layer DCI signaling. Among them, the cyclic shift value range [0~7], or [0, s1], the transmission comb tooth value range is [0, 1], or, [0, 3], or, [0, s2] . Where s1 is a positive integer greater than or equal to 7. S2 is a positive integer greater than or equal to 3. The different SRS symbol positions of different UE configurations may be the method of configuring SRS symbol positions in Embodiment 1 and Embodiment 2.

Case 3: A method in which the UE transmits an SRS for the case where different UEs are configured with the same candidate SRS symbol position.

For case 3, different UEs are configured with the same candidate SRS symbol position, wherein the candidate SRS symbol positions may be continuous in the time domain or may be composed of multiple symbols discrete in the time domain.

The same SRS symbol positions for different UE configurations are the same as those for configuring SRS symbol positions in Embodiment 1 and Embodiment 2.

Wherein, in the candidate SRS symbol positions, different transmission combs and/or cyclic shifts may be configured in UEs with different SRS symbol positions. In this way, when at least one of the plurality of UEs performs a CCA failure before the candidate SRS symbol position, it succeeds before the next SRS symbol position and transmits on the current SRS symbol, and does not cause a resource collision. In an embodiment, one of the candidate SRS symbol positions successfully transmits the SRS, and the other candidate SRS symbols, the UE may continue to perform the LBT and transmit the SRS, or may not transmit the SRS. Alternatively, the SRS is sent directly without performing LBT.

The candidate SRS symbol locations may be discrete in the time domain. For example, the candidate SRS transmission symbol positions configured by the UE are 13, 11, 9. The position of the CCA is before the symbol 9, the symbol 10, and the symbol 12. If UE1 performs LBT success before symbol 9, the UE transmits SRS on symbol 9. If UE1 wants to continue transmitting SRS on symbol 11, UE1 operates in symbol 10 in two ways: First, the UE transmits a reservation signal or an occupancy signal on a specific resource transmitted in symbol 10. Alternatively, the UE performs LBT within symbol 10. The LBT may be LBT CaT4, the minimum contention window 0 or 1, the maximum contention window 5, and n is 0, or 1, in the defer period. Alternatively, the LBT can be a Cat2LBT. A specific resource is a specific RE or RB or RBG or subband. That is, UE1 sends on a specific resource. Occupancy signal or reserved signal, blank in the frequency domain except for specific resources. For example, the LBT performed by UE1 within symbol 10 may be the same as the LBT mechanism performed prior to symbol 9, or may be a more simplified LBT, or a shorter contention window. Or, Cat2LBT, and the CCA duration is 25us. If the SRS is successfully transmitted on the symbol 11, its candidate SRS symbol position transmission method is the same as above. Alternatively, if UE1 performs LBT success before symbol 9, the UE transmits SRS on symbol 9. UE1 may not transmit SRS on candidate symbols 11, 13.

If UE1 fails to perform LBT before symbol 9, continue to execute LBT before proceeding to symbol 10, or symbol 11, wherein the LBT mechanism performed before symbol 10, or symbol 11, may be the same as the LBT mechanism performed before symbol 9 Or, it is more simplified than the LBT mechanism performed before symbol 9, or a shorter contention window, or Cat2LBT, and the CCA duration is 25us. That is, if the UE performs an LBT failure before the current SRS symbol position, the LBT mechanism performed at the next SRS symbol position may be the same as the previous SRS symbol performing the LBT mechanism, or a shorter contention window, or a more simplified LBT mechanism. For example, Cat2LBT, and the CCA duration is 25us. The LBT method performed by the candidate SRS symbol position transmitting SRS is analogously the same method as described above.

Case 4: A method in which the UE transmits an SRS for different UEs to configure different candidate SRS symbol position cases.

Different from Case 3, for Case 4, candidate SRS symbol positions of different UE configurations may overlap, or may overlap partially, or may not overlap.

When there is partial overlap of candidate SRS symbol positions for different UE configurations, different UEs configure different transmission combs or cyclic shifts in partially overlapping SRS symbol positions. UEs with different overlapping SRS symbol positions may be configured with the same transmission comb, or the same cyclic shift, or different transmission combs, or different cyclic shifts.

In addition, if the symbol position of one UE transmitting the SRS is the same symbol as the position of the CCA symbol performed by another UE, the CSA frequency domain pattern can be used to avoid the collision between the SRS transmission position and the CCA execution position, that is, the transmission of the SRS is combed. One of them is reserved for other UEs for CCA detection. That is to say, within one symbol, SRS and CCA are multiplexed by frequency division.

Example 4

A method of "SRS without PUSCH", "SRS with PUSCH" and "PUSCH" simultaneously transmitting congestion between LBT and PUSCH transmissions avoiding SRS in the same uplink subframe is provided.

If the SRS without PUSCH is allowed to be transmitted in the normal uplink subframe in the LAA, if the SRS symbol position is still the last symbol of the subframe, when "SRS without PUSCH", "SRS with PUSCH" and "PUSCH" are in the same In the case of simultaneous transmission in the uplink subframe, in order to meet the regulatory requirements for performing LBT before the transmission signal in the ETSI, the base station configures the subframe of the SRS without PUSCH, and the base station informs the UE of the blank to the penultimate of the subframe by the physical layer DCI signaling. The symbol, the second to last symbol, is used to send the SRS to perform CCA.

Alternatively, in the subframe in which the SRS without PUSCH is configured, the existing SRS symbol position is modified, that is, the last symbol in the subframe is modified to the first symbol in the subframe ("SRS without PUSCH", "SRS" The CCA position of "with PUSCH" and "PUSCH" is the transmission "SRS without PUSCH", the "SRS with PUSCH" and the last symbol of the previous subframe in the "PUSCH" subframe), or the second symbol ("SRS" Without PUSCH", the CCA position of "SRS with PUSCH" and "PUSCH" is the transmission "SRS without PUSCH", the "SRS with PUSCH" and the first symbol in the "PUSCH" subframe).

The new SRS symbol position may be notified to the UE through physical layer DCI signaling, or the subframe position in which the SRS without PUSCH is transmitted implicitly determines the SRS symbol position. The subframe position for transmitting the SRS without PUSCH may be shared at the cell level. Physical layer DCI signaling, including: UE-specific DCI signaling (eg, format 0/4 signaling); or, common DCI signaling (eg, format 1C); or, group DCI signaling (eg, format 3) /3A); or, DL grant (for example, format 1A/2B/2C) signaling.

Example 5

This embodiment is based on the support of wideband SRS in the LAA system, and provides a solution to meet the bandwidth requirements of the ETSI when the SRS bandwidth configuration parameter C _SRS ≥ 2.

Among them, the bandwidth requirement in ETSI is that the transmission device transmits at least 80% of the total bandwidth on the unlicensed carrier.

For SRS, the transmission bandwidth on the unlicensed carrier must also meet the bandwidth requirements in ETSI. In the LTE protocol, only the SRS bandwidth configuration parameter C _SRS is 0, 1, 2 meets the regulatory requirements that the transmission bandwidth in the ETSI accounts for at least 80% of the total bandwidth. However, when the SRS bandwidth configuration parameter C _{SRS is} greater than 2, the SRS transmission bandwidth does not satisfy the bandwidth requirement in the ETSI.

Based on this, when the SRS bandwidth configuration parameter C _{SRS is} greater than 2, the method for satisfying the requirement that the total bandwidth of the transmission bandwidth is at least 80% is as follows:

Method 1: The method of repeating N in the frequency domain.

The bandwidth of the SRS is determined according to B _srs and C _srs to determine the number of repetitions in the frequency domain, or the number of repetitions is signaled by the higher layer RRC or physical layer DCI. For example, B _SRS =0, and the SRS transmission bandwidth determined by C _SRS = 6 is 48 PRBs (physical resource blocks), and the number of repetitions in the corresponding frequency domain is 2. FIG. 11 is a schematic diagram of a frequency domain repetition N satisfying an ETSI regulatory bandwidth requirement according to an embodiment of the present invention, as shown in FIG.

The SRS sequence is started to be mapped according to the frequency domain starting point configured by the high layer RRC signaling or the physical layer DCI signaling. If the SRS sequence is repeatedly mapped on resources with less than 80% bandwidth.

Method 2: Increase the length of the SRS sequence until at least 80% of the corresponding bandwidth specified in the regulation.

Method 3: Increase the method of transmitting comb Comb. That is, the correspondence between the transmission comb Comb and the SRS transmission bandwidth is established.

The transmission comb Comb may be 2, 4, 6, 8, 12, and the like.

Method 4: Modify the subcarrier spacing. For example, different subcarrier spacings are corresponding according to different SRS bandwidths.

That is, the subcarrier spacing is assumed to be r, and the corresponding SRS bandwidth = r * 12 * Msrs > = 80% system bandwidth. The Msrs is a PRB corresponding to the SRS bandwidth.

Method 5: Use the frequency domain frequency hopping method to meet the regulatory requirements that the nominal bandwidth meets at least 80% of the total bandwidth over a period of time. The frequency domain frequency hopping mode is generally the same as the existing LTE technology, except that the time domain interval of the frequency hopping is changed from the subframe level to the symbol level. That is, at the end of the downlink burst, a partial subframe The remaining symbols, or the candidate SRS time domain symbol positions, or, in the configured SRS independent transmission subframe, the SRS frequency domain frequency hopping is frequency hopping in accordance with the symbols.

Method 6: Using the RB interleaving method.

For example, Bsrs=0, Csrs is configured to be 6 or 7, and the RB corresponding to the SRS bandwidth is 48. Then, the SRS may be mapped by the method of interpolating the RB, that is, according to the frequency domain starting point, the resources corresponding to the modb are mapped according to 96 mod2 (the interval of 2 is the RB), but each PRB is mapped according to the original comb.

Method 7: Use block interleaving.

For example, Bsrs=0, Csrs is configured to be 3, and the RB corresponding to the SRS bandwidth is 72. The number of clusters may be 2, 3, 4, 6, 8, 9, 12, 24, and the number of corresponding intra-cluster RBs is 36, 24, 18, 12, 9, 6, and 3, respectively. FIG. 12 is a schematic diagram of satisfying ETSI regulatory bandwidth requirements by using a block interleaving method, as shown in FIG. 12, according to an embodiment of the present invention.

Example 6

This embodiment provides a method for processing a discontinuity of a signal transmitted by a user equipment UE in a multi-subframe scheduling scenario.

For the case where the PUSCH starts transmission from the symbol index of the subframe, the symbol of the blank in the subframe is the symbol index 0 in the subframe. And/or, the PUSCH starts to transmit from the symbol index 0 in the subframe, and the PUSCH end symbol index is 12, or 11, in the case of a blank symbol in the subframe, the symbol index in the subframe is 13, or 12 and 13.

The PUSCH start symbol position, or the end symbol position, and/or the LBT performed symbol position may be configured by the base station to the UE through physical layer DCI signaling.

Based on this, when UE1 is scheduled on consecutive multiple subframes, for example, subframe #n, subframe #n+1, and the starting point of PUSCH transmission in the subframe is symbol 0, and the end position is symbol 12 When the UE performs PUSCH transmission on the subframe #n and the subframe #n+1, a transmission signal discontinuity occurs because the UE does not perform signal transmission on the last symbol of the subframe #n. For the case where the blank symbol in the subframe in the multi-subframe scheduling scenario is the symbol 0, the transmission signal discontinuity occurs between the preceding and succeeding sub-frames.

The way to avoid signal discontinuities in multiple sub-frames is as follows:

Method 1: implicitly instructing the UE to perform LBT at the blank symbol between the preceding and succeeding subframes. LBT can Use a 25us Cat2LBT mechanism, or a DRS-like LBT mechanism, or a Cat2LBT mechanism that randomly selects the CCA starting point, or a minimum contention window of 0, a maximum contention window of 5, a deter period where n is 0, or a Cat4LBT of 1 mechanism. Among them, the defer period is determined by the fixed CCA duration plus n slots. The slot is 9us and the fixed CCA is 16us.

Method 2: explicitly indicate that the LBT is performed at the blank symbol between the preceding and succeeding subframes through the physical layer DCI signaling. The physical layer DCI signaling may indicate a symbol position at which PUSCH transmission starts, and/or a PUSCH transmission end symbol position, and/or a blank symbol position in a subframe, and/or an LBT mechanism, and/or an LBT. The parameters corresponding to the mechanism, such as the maximum contention window and the minimum contention window value, the random backoff value, the n value in the defer period, the CCA duration duration, and the CCA duration starting point.

Method 3: The UE sends a sparse reserved signal or an occupied signal at a blank symbol between the preceding and succeeding subframes. A sparse reserved signal or occupied signal means that the reserved signal or the occupied signal is only in a specific frequency domain resource (RE (Resource Element) or RB (Resource Block) or RBG (Resource Block Group). Send on group) or subband). Some or all of the frequency domain resources except for a specific frequency domain resource in the blank symbol may be used for other UEs to perform CCA, and PUSCH transmission and/or SRS transmission may be performed if the CCA is successful. The frequency domain blank resource location and/or the time domain symbol location used to perform CCA may be dynamically notified to the UE by the base station through physical layer DCI signaling.

Physical layer DCI signaling, including: UE-specific DCI signaling (eg, format 0/4 signaling); or, common DCI signaling (eg, format 1C); or, group DCI signaling (eg, format 3/) 3A); or, DL grant (eg, format 1A/2B/2C) signaling.

Example 7

This embodiment mainly provides a method for transmitting periodic SRS and aperiodic SRS.

When the period and offset parameters of the SRS transmission are configured by the upper layer RRC signaling, the LAA performs opportunistic downlink or uplink transmission due to the uplink or downlink buffer state, thereby causing a discontinuity in the transmission signal. Based on this, the UE can perform SRS transmission at the SRS periodic point only when the UE performs the LBT successfully before the SRS periodic point and the PUSCH is present at the SRS periodic point. It is also possible that the UE can perform SRS transmission at the SRS periodic point only when the UE performs LBT success before the SRS cycle point. It is also possible to perform LBT even before the SRS cycle point of the UE. If the SRS transmission is successful, the SRS transmission cannot be performed at the SRS periodic point. The SRS transmission can be attempted at the SRS periodic point only after the physical layer DCI signaling is triggered. The physical layer DCI signaling triggering the SRS transmission may trigger the UE. Perform an SRS transmission, or N times SRS transmission. That is, the trigger SRS transmission field is added in the physical layer DCI signaling, and/or the field indicating the SRS transmission number is added. N is a positive integer greater than or equal to 1. For example, N is 1, 2, 3, 4, 5, 6, 7, 8. Further, the UE attempting to perform SRS transmission at the periodic point of the SRS means that the LBT is successfully executed before the periodic point of the SRS, and the transmission can be performed at the SRS periodic point. Conversely, if the LBT failure is performed before the SRS cycle point, the transmission cannot be performed at the SRS cycle point.

The time domain subframe position of the SRS transmission can be configured through physical layer DCI signaling in addition to the high layer RRC signaling configuration. The subframe position of the SRS transmission or the location of the candidate SRS transmission subframe configured by the physical layer DCI signaling may be adopted by one of the following methods:

Manner 1: The physical layer DCI signaling carries a field for indicating a subframe position of the SRS transmission or a candidate SRS transmission subframe position. The UE can know the time domain subframe position of the transmission SRS or the candidate time domain subframe position by receiving the DCI signaling.

Manner 2: The physical layer DCI signaling carries a field indicating a specific timing relationship value k. The time domain subframe position of the SRS transmission or the candidate time domain subframe position may be determined by a specific timing relationship value. For example, the physical layer DCI signaling is sent on the subframe n, and the subframe corresponding to the n+k is determined as the time domain subframe position of the SRS transmission or the time domain of the candidate by receiving the DCI signaling and the specific timing relationship value carried. Subframe position. Where k may be a value greater than or equal to 0, or may be a value greater than or equal to 4, and k is 0, 1, 2, 3, 4, 5, 6, 7, 8.

Manner 3: The period and the offset of the high-layer RRC signaling configuration, only when the UE receives the physical layer DCI signaling sent by the base station, the period of the high-layer RRC signaling configuration and the time-domain subframe position or candidate corresponding to the offset At least one of the domain subframe positions is valid, or, available. The physical layer DCI signaling may carry indication information indicating that the SRS performs one transmission in the candidate time domain subframe, or multiple transmissions.

In addition, the subframe position of the SRS transmission or the candidate SRS transmission subframe position may be determined in an implicit manner. For example, when receiving the common DCI signaling, the SRS may be known to be the first subframe in the uplink transmission burst, or And transmitting the even subframe or the odd subframe corresponding to the subframe index in the transmission burst (that is, the subframe within the burst length may be correspondingly transmitted through the subframe quotation mark or uplink) The subframe corresponding to one of 0, 1, 2, ..., p-1 obtained by mod p is an SRS time domain subframe or a candidate SRS time domain subframe), or, a DRS subframe, or a downlink tail portion frame. The SRS transmission on the SRS time domain subframe or the candidate time domain subframes of the symbols or candidate time domain symbols may also be notified by physical layer DCI signaling, or the upper layer RRC signaling configuration, or the base station And the UE pre-determined, or, in a predefined manner. Wherein, the DCI signaling for determining the SRS time domain symbol or the candidate time domain symbol position, and the signaling for determining the SRS time domain subframe position or the candidate SRS time domain subframe position, and the signaling for triggering the SRS transmission may be the same One DCI signaling, or different DCI signaling.

In an embodiment, the signaling for triggering the SRS transmission may multiplex the DCI format 0/4/1A/2B/2C/2D in the existing protocol, where for the SRS and the PUSCH, the trigger SRS transmission may adopt the DCI format 0. /4. For the case where the SRS is not related to the PUSCH, the triggering SRS transmission may be performed by using DCI format 2B/2C/2D, or DCI format 1C, or DCI format 3/3A. Wherein, for DCI format 1C, reserved bits may be utilized to indicate triggering SRS transmission. For DCI format 3/3A, a field can be added to indicate the triggering of the SRS transmission. Based on this, a time domain subframe position or a candidate time domain subframe field of the SRS transmission is also added in the DCI format, and/or a time domain symbol of the SRS transmission or a candidate time domain symbol field is added, and/or , adding a field that triggers SRS to perform single transmission or multiple transmissions, and/or, adds a timing relationship value k.

For aperiodic SRS transmission, the signaling that triggers the aperiodic SRS transmission triggers the SRS transmission. In an implementation manner, the UE may be triggered to perform one SRS transmission, or N times SRS transmission. In addition, the time domain location of the aperiodic SRS transmission may dynamically indicate the time domain subframe position of the SRS transmission or the candidate time domain subframe position through physical layer DCI signaling, in addition to the SRS periodic point configured by the upper layer RRC.

Whether SRS transmission is possible at the candidate time domain subframe position depends on the physical layer DCI signaling trigger and/or LBT result. The DCI signaling triggering refers to triggering the SRS to transmit, and/or triggering the UE to perform an SRS transmission in a candidate time domain subframe, or may perform multiple SRS transmissions.

That is, at the candidate SRS time domain subframe position, if the UE performs LBT success before one of the candidate time domain subframes, SRS transmission can be performed on the candidate time domain subframe position. Or By,

If the UE performs LBT successfully before one of the candidate time domain subframes, but does not receive the DCI signaling sent by the base station, the SRS transmission cannot be performed on the time domain subframe even if the UE has successfully performed the LBT. or,

If the UE performs LBT successfully before one of the candidate time domain subframes, and receives DCI signaling sent by the base station, performs an SRS transmission according to the indication in the DCI signaling, or multiple times, the SRS transmission information is in the candidate. SRS transmission is performed on multiple SRS time domain subframe positions.

Wherein, if the candidate multiple SRS transmission time domain locations are consecutive in the time domain, once the UE performs LBT success before one of the SRS transmission time domain locations, the SRS can be directly performed on the subsequent candidate SRS time domain locations. Send without having to perform LBT. And if the candidate multiple SRS transmission time domain locations are discrete in the time domain, once the UE performs LBT success before one of the SRS transmission time domain locations, that is, only the current SRS time domain location can be transmitted. To perform transmission on the subsequent candidate SRS time domain location, one of the following operations is required: First, the LBT mechanism is implemented. The second is to send a sparse reserved signal or occupy signal. A sparse reserved signal or occupied signal means that the reserved signal or the occupied signal is transmitted only on a specific frequency domain resource on the total bandwidth, and the remaining frequency domain resources are vacant or reserved. The reason for this is that the signals transmitted by the UE between the front and rear SRS time domain locations are discontinuous, which may result in loss of use of the channel at blank symbols or subframes between the front and rear SRS time domain locations, based on which, At blank symbols or subframes between the front and back SRS time domain locations, the UE either needs to transmit an occupancy signal or needs to perform LBT.

Here, the processing method of performing SRS transmission on a plurality of candidate time domain subframes is also applicable to the case of performing SRS transmission on a plurality of candidate time domain symbol positions.

The time domain subframe of the SRS transmission may be a downlink end subframe, or a DRS subframe, or an uplink subframe in an uplink transmission burst, or at least one of the first subframe in an uplink transmission burst. Further, the time domain symbol position for performing SRS transmission on the remaining symbols in the downlink end subframe may be configured by physical layer DCI signaling, and/or, high layer RRC signaling configuration, and/or implicitly determined according to the remaining number of symbols. And/or, the base station and the UE acquire in advance by way of agreement. And transmitting the SRS in the DRS subframe means that the SRS can transmit on at least one of the remaining two symbols in the DRS subframe.

Physical layer DCI signaling includes: UE-specific DCI (eg, DCI format 0/4) or, DL Grant (for example, DCI format 1A/2B/2C/2D) or common DCI (for example, DCI format 1C) or group DCI (for example, DCI format 3/3A), that is, at least one of physical layer DCI signaling. Adding an SRS subframe field, and/or an SRS trigger field, and/or an SRS symbol field, and/or a timing relationship value, and/or an index of a table of different symbol numbers and SRS transmission time domain symbol position correspondence table Indicates the field.

It should be noted that the foregoing embodiment or the embodiment is not limited to the application of the subframe at the end of the downlink transmission, and may also be used for the uplink transmission end subframe, or the uplink transmission start partial subframe, or the uplink complete subframe. , or, downlink complete subframe condition, or other scenarios (for example, LAA, SDL (Standalone Downlink), SUL (Standalone Uplinke), LAA DC (Double Connection), NB-IOT ( Narrow Band Internet of Things, cellular-based narrowband Internet of Things, MTC (Machine type communication), or other situations.

Through the foregoing embodiments and implementation manners, SRS transmission in the case where there are many remaining symbols in the downlink end subframe is realized to a certain extent. At the same time, SRS transmission opportunities have also been increased, and SRS capacity has been increased. In addition, the specific configuration in the wideband SRS also satisfies the regulatory requirements for bandwidth in ETSI.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present application can be embodied in the form of a software product stored in a storage medium (such as a ROM/RAM, a magnetic disk, an optical disk), and includes a plurality of instructions for making a terminal. The device (which may be a cell phone, computer, server, or network device, etc.) performs the methods of various embodiments of the present invention.

Device embodiment

In the embodiment, a signal transmission device and a user equipment are also provided, which are used to implement the foregoing embodiments and implementation manners, and are not described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware Implementation is also possible and conceived.

FIG. 13 is a block diagram showing the structure of a signal transmission apparatus according to an embodiment of the present invention. As shown in FIG. 13, the apparatus includes a first determination module 132 and a first transmission module 134, which will be described below.

a first determining module 132, configured to determine a symbol position for transmitting the sounding reference signal SRS; the first transmission module 134, coupled to the first determining module 132, configured to transmit an SRS at the determined symbol position; wherein The symbol position is a time domain symbol position or a candidate time domain symbol position.

In an embodiment, the first determining module is configured to determine a symbol position for transmitting the sounding reference signal SRS according to at least one of the following manners:

a manner according to a predetermined correspondence between the number of symbols and the position of the symbol;

Adopting a clear indication of signaling;

Implied convention.

In an embodiment, the predetermined correspondence between the number of symbols and the position of the symbol includes at least one of the following: a correspondence between the index number and a different number of symbols and a symbol position; and a predetermined number of symbols, the index number and the symbol The correspondence between the locations.

FIG. 14 is a block diagram showing the structure of the first determining module 132 in the signal transmission apparatus according to the embodiment of the present invention. As shown in FIG. 14, the first determining module 132 includes: a first determining unit 142, and the first determining is performed below. Unit 142 is described.

The first determining unit 142 is configured to determine a symbol position for transmitting the SRS according to the acquired index number.

FIG. 15 is a block diagram showing the structure of the first determining module 132 in the signal transmission apparatus according to the embodiment of the present invention. As shown in FIG. 15, the first determining module 132 includes: a first acquiring unit 152, and the first obtaining is performed below. Unit 152 is described.

The first obtaining unit 152 is configured to obtain an index number by using at least one of the following manners: a manner of controlling RRC signaling by a high-layer radio link, a method of controlling downlink information by a physical layer downlink, and a method of using a base station and a user equipment UE in advance The agreed manner; wherein a field for indicating an index number is added in RRC signaling or physical layer DCI signaling.

In an embodiment, in a manner that the signaling is explicitly indicated, the signaling that explicitly indicates the symbol location for transmitting the SRS includes at least one of the following signaling: high layer RRC signaling; physical layer DCI signaling, where signaling A field is included for indicating the symbol position of the SRS transmission.

In an embodiment, the high-layer RRC signaling configures the SRS transmission time domain location or the candidate time domain location, and the physical layer DCI signaling triggers the SRS time domain location configured by the high-layer RRC signaling or the candidate time domain location takes effect; or, the upper layer The SRS time domain location or the candidate time domain location configured by the RRC signaling is configured as soon as it is configured; or the SRS time domain location or the candidate time domain location configured by the upper layer RRC signaling is at the end of the downlink transmission burst or the uplink transmission. Effective in burst.

In an embodiment, the physical layer DCI signaling carries a symbol location field for indicating SRS transmission; or the first physical layer DCI signaling triggers SRS transmission, and the SRS transmission is indicated by the second physical layer DCI signaling. Symbol location.

In an embodiment, the first physical layer DCI signaling triggers the SRS transmission, including: the first physical layer DCI signaling carries a field for triggering the SRS transmission, where the field triggering the SRS transmission includes: triggering an SRS transmission, Or, multiple SRS transmissions.

In an embodiment, the symbol position for transmitting the SRS is determined by implicitly agreeing, including at least one of: determining a symbol position for transmitting the SRS according to the number of symbols remaining in the subframe at the end portion of the downlink transmission burst; The moment when the LBT mechanism is successfully executed is determined to determine the symbol position for transmitting the SRS; the base station and the UE determine the symbol position for transmitting the SRS in a manner agreed in advance.

16 is a block diagram showing the structure of a signal transmission apparatus according to an embodiment of the present invention. As shown in FIG. 16, the apparatus includes, in addition to all the modules shown in FIG. 13, a second determining module 172, which is described below. The second determination module 172 is described.

The second determining module 172 is connected to the foregoing first determining module 132, and is configured to determine, by at least one of the following manners, a time domain subframe position or a candidate time domain subframe position to which the symbol position for transmitting the SRS belongs: by using a higher layer RRC The mode of signaling configuration; the mode of configuration by physical layer DCI signaling; the combination of high-layer RRC signaling and physical layer DCI signaling; and the combination of N physical layer DCI signaling, where N is greater than or equal to An integer of 1; by implicit convention The way; through the way agreed by the base station and the UE in advance.

In an embodiment, the second determining module 172 is configured to determine a time domain subframe position or a candidate time domain subframe position by using a high layer RRC signaling configuration, including: configuring, by using high layer RRC signaling, for SRS transmission. The parameters determine the time domain subframe position or the candidate time domain subframe position; or, the parameters for SRS transmission configured by the high layer RRC signaling are effective once configured; or the parameters for SRS transmission configured by the upper layer RRC signaling During the uplink transmission burst, the parameters for the SRS transmission include at least one of the following: period, offset, transmission comb, cyclic shift, LBT symbol index, time domain pattern of SRS transmission, SRS transmission Time window, time window offset, time window interval, SRS transmission time window start position, one transmission, multiple transmission.

In an embodiment, the second determining module 172 is configured to determine a time domain subframe position or a candidate time domain subframe position by using physical layer DCI signaling configuration, including at least one of the following: a physical medium that triggers SRS transmission. The layer DCI signaling is sent on the subframe n, and the time domain subframe position or the candidate time domain subframe position is determined according to a predetermined timing relationship. The physical layer DCI signaling carries the indication time domain subframe position or the candidate time domain subframe. The field of the location determines the time domain subframe position or the candidate time domain subframe position according to the field.

In an embodiment, the second determining module 172 is configured to determine a time domain subframe position or a candidate time domain subframe position by using a combination of high layer RRC signaling and physical layer DCI signaling, including at least one of the following: : high-level RRC signaling configures parameters for SRS transmission, physical layer DCI signaling triggers high-level RRC signaling configuration parameters for SRS transmission to take effect; high-layer RRC signaling configures at least one of parameters for SRS transmission The physical layer DCI signaling configures parameters of the SRS transmission that are not configured by the high-layer RRC signaling; the high-layer RRC signaling configures at least one of the parameters used for the SRS transmission, and the physical layer DCI signaling carries the time domain indicating the SRS transmission. a field of a subframe position or a candidate time domain subframe position, determining a time domain subframe position or a candidate time domain subframe position for SRS transmission according to the field; and configuring, by the high layer RRC signaling, at least one of parameters of the SRS transmission Physical layer DCI signaling triggers SRS transmission and/or determines a time domain subframe position or a candidate time domain subframe position for SRS transmission according to a predetermined timing relationship; wherein parameters for SRS transmission include at least one of the following : period, offset, transmission comb, cyclic shift, LBT symbol index, time domain pattern of SRS transmission, time window of SRS transmission, offset within time window, time Inter-window interval, the starting position of the SRS transmission time window, one transmission, multiple transmissions.

In an embodiment, the second determining module 172 is further configured to determine a time domain subframe position or a candidate time domain subframe position by combining the N times physical layer DCI signaling, including at least one of the following: The physical layer DCI signaling configures the time domain subframe position or the candidate time domain subframe position of the SRS transmission, and enables the information of the first physical layer DCI signaling configuration by using the second physical layer DCI signaling, and/or The second physical layer DCI signaling triggers the SRS transmission; the SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is indicated by the second physical layer DCI signaling; The physical layer DCI signaling triggers the SRS transmission, and determines the time domain subframe position or the candidate time domain subframe position of the SRS transmission according to the predetermined timing relationship by using the second physical layer DCI signaling; the first physical layer DCI signaling according to the predetermined timing The relationship determines a time domain subframe position or a candidate time domain subframe position of the transmission SRS, triggers SRS transmission by the second physical layer DCI signaling, and/or triggers the first physical layer DCI signaling by using the second physical layer DCI signaling Determine the time domain subframe bit of the SRS transmission Or a time-domain subframe position candidate is enabled.

In an embodiment, the predetermined timing relationship includes: n+k; or, n+k1; wherein n is a subframe number of physical layer DCI signaling that triggers SRS transmission; k is a positive integer greater than or equal to 4; k1 Is a positive integer greater than or equal to 0.

In an embodiment, k or k1 may be obtained by at least one of the following: a high-level RRC signaling configuration; a physical layer DCI signaling indication; and a base station and a UE pre-agreed mode.

In an embodiment, the physical layer DCI signaling includes one of the following: UE-specific DCI signaling, using DCI format 0/4; common DCI signaling, using DCI format 1C; group downlink control information Group DCI signaling, adopting DCI format 3/3A; downlink downlink control information DL DCI signaling, using DCI format 1A/2A/2B/2C; new DCI signaling.

In an embodiment, the second determining module 172 is configured to determine a time domain subframe position or a candidate time domain subframe position of the SRS transmission by using an implicit agreement, including at least one of the following: after the downlink transmission burst ends The SRS parameter configured in the upper layer RRC signaling or the time domain subframe position or the candidate time domain subframe position of the SRS transmission explicitly indicated by the physical layer DCI signaling; the last partial subframe after the downlink transmission burst; after the downlink transmission burst The first uplink subframe; after the downlink transmission burst, the second uplink subframe; after the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an even-numbered subframe; after the downlink transmission burst, the uplink transmission burst is uplinked The subframe index is an odd-numbered subframe; the first uplink subframe in the uplink transmission burst; the second uplink subframe in the uplink transmission burst; the uplink subframe index in the uplink transmission burst is an even-numbered subframe; the uplink transmission burst The intermediate uplink subframe index is an odd-numbered subframe; wherein the SRS parameter includes at least one of the following: a period, an offset, a transmission comb, a cyclic shift, a symbol index of the LBT, a time domain pattern of the SRS transmission, and an SRS transmission. Time window, time window offset, time window interval, SRS transmission time window start position, one transmission, multiple transmission.

In an embodiment, the time domain subframe position or the candidate time domain subframe position information used to indicate the SRS transmission, and the symbol location information used to indicate the SRS transmission are in the same physical layer DCI signaling, or Different physical layer DCI signaling.

In an embodiment, the foregoing first transmission module 134 is configured to transmit the SRS on the determined symbol position, including: different user equipment UEs are transmitted in the same one time domain symbol position; different UEs are different. Time domain symbol position transmission; different UEs are transmitted in the same candidate time domain symbol position; different UEs are transmitted in different candidate time domain symbol positions.

In an embodiment, different UEs are multiplexed by different transmission combs and/or cyclic shifts in the case of transmissions at the same symbol position.

In an embodiment, transmitting, by the different UEs in the same or different candidate time domain symbol positions comprises: stopping the candidate time domain symbol positions in a case where a predetermined time domain symbol position transmission SRS is successful in the candidate time domain symbol positions Transmitting SRS in other time domain symbol positions than the predetermined time domain symbol position; or, in the case where a predetermined time domain symbol position transmission SRS in the candidate time domain symbol position is successful, continuing to be excluded in the candidate time domain symbol position The SRS is transmitted at other time domain symbol locations than the predetermined time domain symbol location.

17 is a block diagram 3 of a structure of a signal transmission apparatus according to an embodiment of the present invention. As shown in FIG. 17, the apparatus includes, in addition to all the modules shown in FIG. 13, an execution module 182, and the execution module 182. Be explained.

The execution module 182 is connected to the first transmission module 134, and is configured to perform an LBT mechanism after the different UEs transmit in the same or different symbol positions. In the case that the LBT mechanism is successful, the first The transmission module transmits the SRS at the symbol location.

In an embodiment, when the symbol position is a candidate time domain symbol position, the execution mode The block is set to: use the same or different LBT mechanisms for different candidate time domain symbol positions, wherein when different LBT mechanisms are used, the LBT mechanism performed before the previous candidate time domain symbol position is later than the latter candidate time domain symbol position The previously implemented LBT mechanism is simplified, or there is a shorter competition window.

In an embodiment, the apparatus further includes: a satisfying module, configured to meet at least one of the following manners, satisfying a regulatory requirement that the SRS transmission bandwidth accounts for at least 80% of the total bandwidth: by repeating the manner in which the SRS occupies a predetermined number of times of bandwidth N, By increasing the length of the SRS sequence, by increasing the manner of the transmission comb, by modifying the subcarrier spacing, by means of frequency domain hopping, by means of resource block interleaving, by means of block interleaving.

FIG. 18 is a structural block diagram of a user equipment UE 10 according to an embodiment of the present invention. As shown in FIG. 18, the UE 10 includes the signal transmission device 192 of any of the above.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

Embodiments of the present invention also provide a storage medium. In an embodiment, in the embodiment, the storage medium may be configured to store program code for performing the following steps:

S1, determining a symbol position for transmitting the sounding reference signal SRS; wherein the symbol position is a time domain symbol position or a candidate time domain symbol position;

S2, transmitting the SRS at the determined symbol position.

In this embodiment, the foregoing storage medium may include, but not limited to, a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk. A variety of media that can store program code.

In this embodiment, the processor executes the method steps described in the above embodiments according to the program code stored in the storage medium.

For examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and implementation manners, and details are not described herein again.

It should be noted that the signal transmission method, apparatus, and user equipment of the embodiments of the present invention are not Applicable only to unlicensed carrier scenarios. It can also be applied to scenarios where licensed carriers and other types of carriers are used.

The modules or steps of the above embodiments of the present invention may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices, which may be implemented by computing devices. The executed program code is implemented such that they can be stored in a storage device by a computing device, and in some cases, the steps shown or described can be performed in a different order than here, or they can be Each of the integrated circuit modules is fabricated separately, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the application is not limited to any particular combination of hardware and software.

The above description is only for the embodiments of the present invention, and is not intended to limit the present application, and various changes and modifications may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Industrial applicability

Through the embodiment of the present invention, the symbol position for transmitting the sounding reference signal SRS is determined, and the effect of effectively improving the transmission opportunity of the SRS is achieved.

Claims (54)

1. A signal transmission method includes:

   Determining a symbol position for transmitting the sounding reference signal SRS; wherein the symbol position is a time domain symbol position or a candidate time domain symbol position;

   The SRS is transmitted at the determined symbol position.
2. The method of claim 1, wherein the symbol position for transmitting the sounding reference signal SRS is determined according to at least one of:

   a manner according to a predetermined correspondence between the number of symbols and the position of the symbol;

   Adopting a clear indication of signaling;

   Implied convention.
3. The method of claim 2, wherein the predetermined correspondence between the number of symbols and the symbol position comprises at least one of the following correspondences:

   The correspondence between the index number and the number of different symbols and the position of the symbol;

   The correspondence between the index number and the symbol position under a predetermined number of symbols.
4. The method of claim 3, wherein determining the symbol location for transmitting the SRS comprises:

   The symbol position for transmitting the SRS is determined according to the acquired index number.
5. The method of claim 4, wherein the index number is obtained by at least one of:

   A method of controlling RRC signaling through a high-level radio link;

   The method of downlink information control information DCI signaling through the physical layer;

   a manner agreed in advance by the base station and the user equipment UE;

   The field for indicating the index number is added to the RRC signaling or the physical layer DCI signaling.
6. The method according to claim 2, wherein in the manner in which the signaling is explicitly indicated, the signaling explicitly indicating the symbol location for transmitting the SRS comprises at least one of the following signaling:

   High-level RRC signaling;

   Physical layer DCI signaling,

   Wherein, the signaling includes a field for indicating a symbol position of the SRS transmission.
7. The method of claim 6 wherein said means for explicitly indicating by signaling comprises:

   The upper layer RRC signaling configures the SRS transmission time domain location or the candidate time domain location, and the physical layer DCI signaling triggers the SRS time domain location configured by the high layer RRC signaling or the candidate time domain location takes effect; or

   The SRS time domain location or the candidate time domain location configured by the upper layer RRC signaling is configured as soon as it is configured; or

   The SRS time domain location or the candidate time domain location configured by the upper layer RRC signaling is valid in the downlink subframe or the uplink transmission burst.
8. The method of claim 6 wherein said means for explicitly indicating by signaling comprises:

   Physical layer DCI signaling carries a symbol location field for indicating SRS transmission; or

   The first physical layer DCI signaling triggers the SRS transmission, and the second physical layer DCI signaling indicates the symbol position of the SRS transmission.
9. The method according to claim 8, wherein the first physical layer DCI signaling triggers an SRS transmission, including:

   The first physical layer DCI signaling carries a field for triggering SRS transmission, where the field for triggering the SRS transmission includes: triggering one SRS transmission, or multiple SRS transmission.
10. The method of claim 2, wherein the symbol location for transmitting the SRS is determined by the implicit convention, including at least one of the following:

    Determining, according to the number of symbols remaining in the subframe at the end of the downlink transmission burst, a symbol position for transmitting the SRS;

    Listening to the moment when the LBT mechanism is successfully executed determines the symbol position for transmitting the SRS;

    The symbol location for transmitting the SRS is determined in a manner agreed by the base station and the UE in advance.
11. A method according to any one of claims 1 to 10, the method further comprising: passing At least one of the following manners: determining a time domain subframe position or a candidate time domain subframe position to which the symbol position for transmitting the SRS belongs:

    The way of configuring by high-level RRC signaling;

    The way of configuring through physical layer DCI signaling;

    A combination of high-level RRC signaling and physical layer DCI signaling;

    A method of combining N times physical layer DCI signaling, where N is an integer greater than or equal to 1;

    By implicit agreement;

    The way agreed by the base station and the UE in advance.
12. The method according to claim 11, wherein the determining, by the high layer RRC signaling configuration, the time domain subframe position or the candidate time domain subframe position comprises:

    Determining, by the high layer RRC signaling, parameters for SRS transmission to determine the time domain subframe position or the candidate time domain subframe position; or

    The parameters for SRS transmission configured by the upper layer RRC signaling are effective immediately upon configuration; or,

    The parameters for SRS transmission configured by the upper layer RRC signaling are valid during the uplink transmission burst;

    The parameter for SRS transmission includes at least one of the following: period, offset, transmission comb, cyclic shift, symbol index of LBT, time domain pattern of SRS transmission, time window of SRS transmission, time window Internal offset, time window interval, start position of SRS transmission time window, one transmission, multiple transmission.
13. The method according to claim 11, wherein the determining, by the physical layer DCI signaling configuration, the time domain subframe position or the candidate time domain subframe position comprises at least one of the following:

    The physical layer DCI signaling that triggers the SRS transmission is sent on the subframe n, and the time domain subframe position or the candidate time domain subframe position is determined according to a predetermined timing relationship;

    The physical layer DCI signaling carries a field indicating the time domain subframe position or the candidate time domain subframe position, and determining the time domain subframe position or the candidate time domain subframe position according to the field.
14. The method according to claim 11, wherein the determining the time domain subframe position or the candidate time domain subframe position comprises at least the following by way of high layer RRC signaling and physical layer DCI signaling combined configuration one:

    The high-layer RRC signaling configures parameters for SRS transmission, and the parameters for the SRS transmission configured by the physical layer DCI signaling triggering the high-layer RRC signaling are valid;

    The high layer RRC signaling configures at least one of parameters for SRS transmission, and the physical layer DCI signaling configures parameters of the unconfigured SRS transmission of the upper layer RRC signaling;

    The high-layer RRC signaling configures at least one of the parameters for the SRS transmission, where the physical layer DCI signaling carries a field indicating a time domain subframe position of the SRS transmission or the candidate time domain subframe position, according to the field Determining the time domain subframe position or the candidate time domain subframe position for SRS transmission;

    The high layer RRC signaling configures at least one of the parameters used for the SRS transmission, and the physical layer DCI signaling triggers the SRS transmission;

    The high layer RRC signaling configures at least one of parameters for SRS transmission, and the physical layer DCI signaling triggers determining the time domain subframe position or the candidate time domain subframe position for SRS transmission according to a predetermined timing relationship;

    The high layer RRC signaling configures at least one of parameters for SRS transmission, the physical layer DCI signaling triggers the SRS transmission, and determines the time domain subframe position or the candidate time domain for SRS transmission according to a predetermined timing relationship. Frame position

    The parameter for SRS transmission includes at least one of the following: period, offset, transmission comb, cyclic shift, symbol index of LBT, time domain pattern of SRS transmission, time window of SRS transmission, time window Internal offset, time window interval, start position of SRS transmission time window, one transmission, multiple transmission.
15. The method according to claim 11, wherein the determining the time domain subframe position or the candidate time domain subframe position comprises at least one of the following: by combining N times physical layer DCI signaling:

    The time domain subframe position or the candidate time domain subframe position of the SRS transmission is configured by the first physical layer DCI signaling, and the information of the first physical layer DCI signaling configuration is enabled by the second physical layer DCI signaling;

    Configuring the time domain subframe position or the candidate time domain subframe position of the SRS transmission by the first physical layer DCI signaling to trigger the SRS transmission by using the second physical layer DCI signaling;

    Configuring the time domain subframe position or the candidate time domain subframe position of the SRS transmission by the first physical layer DCI signaling, enabling the information of the first physical layer DCI signaling configuration and triggering the SRS transmission by using the second physical layer DCI signaling;

    SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is indicated by the second physical layer DCI signaling;

    The SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is determined according to a predetermined timing relationship by using the second physical layer DCI signaling;

    Determining, by the first physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship, and triggering the SRS transmission by using the second physical layer DCI signaling;

    Determining, by the first physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship, and triggering the first physical layer by using the second physical layer DCI signaling The time domain subframe position of the SRS transmission determined by the DCI signaling or the candidate time domain subframe position is enabled;

    Determining, by the first physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship, triggering the SRS transmission and triggering the first by the second physical layer DCI signaling The time domain subframe position or the candidate time domain subframe position of the SRS transmission determined by the physical layer DCI signaling is enabled.
16. The method of any of claims 13 to 15, wherein the predetermined timing relationship comprises:

    n+k; or,

    n+k1;

    Where n is the subframe number sent by the physical layer DCI signaling that triggers the SRS transmission; k is a positive integer greater than or equal to 4; k1 is a positive integer greater than or equal to 0.
17. The method of claim 16 wherein said k or k1 is obtained by at least one of:

    High-level RRC signaling configuration; physical layer DCI signaling indication; base station and UE agreed in advance.
18. The method of any of claims 4, 6, 7, 8, 9, 11, 13, 14, 15 wherein the physical layer DCI signaling comprises one of the following:

    UE proprietary DCI signaling, using DCI format 0/4;

    Public DCI signaling, using DCI format 1C;

    Group downlink control information Group DCI signaling, using DCI format 3/3A;

    Downlink downlink control information DL DCI signaling, using DCI format 1A/2A/2B/2C;

    New DCI signaling.
19. The method according to claim 11, wherein the determining, by implicit agreement, the time domain subframe position or the candidate time domain subframe position of the SRS transmission comprises at least one of the following:

    After the downlink transmission burst ends, the SRS parameter configured by the upper layer RRC signaling or the time domain subframe position or the candidate time domain subframe position of the SRS transmission explicitly indicated by the physical layer DCI signaling is enabled;

    The last partial subframe after the downlink transmission burst;

    After the downlink transmission burst, the first uplink subframe;

    After the downlink transmission burst, the second uplink subframe;

    After the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an even-numbered subframe;

    After the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an odd-numbered subframe;

    The first uplink subframe in the uplink transmission burst;

    The second uplink subframe in the uplink transmission burst;

    The uplink subframe index in the uplink transmission burst is an even-numbered subframe;

    The uplink subframe index in the uplink transmission burst is an odd-numbered subframe;

    The SRS parameter includes at least one of the following: a period, an offset, a transmission comb, a cyclic shift, a symbol index of the LBT, a time domain pattern of the SRS transmission, a time window of the SRS transmission, and an offset within the time window. , time window interval, starting position of SRS transmission time window, one transmission, more Secondary transmission.
20. The method according to any one of claims 11 to 19, wherein

    a time domain subframe position or a candidate time domain subframe position information for indicating SRS transmission, and symbol position information for indicating SRS transmission in the same physical layer DCI signaling, or a DCI signal at a different physical layer Order.
21. The method of any one of claims 1 to 20, wherein said transmitting said SRS at said determined symbol position comprises at least one of:

    Different user equipment UEs are transmitted in the same time domain symbol position;

    Different UEs are transmitted in different time domain symbol locations;

    Different UEs are transmitted in the same candidate time domain symbol position;

    Different UEs are transmitted at different candidate time domain symbol locations.
22. The method according to claim 21, wherein, in the case that different UEs are transmitted on the same time domain symbol position or candidate time domain symbol position, at least one of multiplexing is performed by: different transmission comb mode multiplexing, Cyclic shift mode multiplexing.
23. The method of claim 21 wherein the transmitting of the same or different candidate time domain symbol locations by different UEs comprises:

    Stopping other time domain symbol position transmissions other than the predetermined time domain symbol position in the candidate time domain symbol position if a predetermined time domain symbol position in the candidate time domain symbol position transmits the SRS successfully The SRS; or,

    And transmitting, in the candidate time domain symbol position, other time domain symbol position transmissions other than the predetermined time domain symbol position, in a case where the predetermined time domain symbol position of the candidate time domain symbol position transmits the SRS successfully The SRS.
24. The method of claim 21, wherein before the different UEs transmit at the same or different symbol locations, the method further comprises:

    The LBT mechanism is executed after listening, and the SRS is transmitted at the symbol position if the LBT mechanism is successfully executed.
25. The method of claim 24 wherein said symbol location is a candidate time domain symbol In the case of location, the execution of the LBT mechanism includes:

    The same or different LBT mechanisms are used for different candidate time domain symbol positions, wherein the LBT mechanism executed before the previous candidate time domain symbol position is earlier than the LBT mechanism performed before the latter candidate time domain symbol position when different LBT mechanisms are used Simplify, or have a shorter competition window.
26. The method of any one of claims 1 to 25, further comprising:

    At least one of the following methods satisfies the regulatory requirements that the SRS transmission bandwidth accounts for at least 80% of the total bandwidth:

    By repeating the manner in which the SRS occupies a predetermined number of times of the bandwidth N, by increasing the length of the SRS sequence, by increasing the manner of the transmission comb, by modifying the subcarrier spacing, the frequency domain frequency hopping method is used to pass the resource. The way of block interleaving is done by block interleaving.
27. A signal transmission device comprising:

    a first determining module, configured to determine a symbol position for transmitting the sounding reference signal SRS; wherein the symbol position is a time domain symbol position or a candidate time domain symbol position;

    a first transmission module configured to transmit the SRS at the determined symbol location.
28. The apparatus of claim 27, wherein the first determining module is configured to determine a symbol position for transmitting the sounding reference signal SRS according to at least one of:

    a manner according to a predetermined correspondence between the number of symbols and the position of the symbol;

    Adopting a clear indication of signaling;

    Implied convention.
29. The apparatus according to claim 28, wherein said predetermined correspondence between said number of symbols and said symbol position comprises at least one of the following correspondences:

    The correspondence between the index number and the number of different symbols and the position of the symbol;

    The correspondence between the index number and the symbol position under a predetermined number of symbols.
30. The apparatus of claim 29, wherein the first determining module comprises:

    The first determining unit is configured to determine the symbol position for transmitting the SRS according to the acquired index number.
31. The device of claim 30, wherein the first determining module further comprises: The first obtaining unit is configured to obtain the index number by using at least one of the following manners:

    A method of controlling RRC signaling through a high-level radio link;

    The method of downlink information control information DCI signaling through the physical layer;

    a manner agreed in advance by the base station and the user equipment UE;

    The field for indicating the index number is added to the RRC signaling or the physical layer DCI signaling.
32. The apparatus according to claim 28, wherein, in the manner in which the signaling is explicitly indicated, the signaling explicitly indicating the symbol location for transmitting the SRS comprises at least one of the following signaling:

    High-level RRC signaling;

    Physical layer DCI signaling,

    Wherein, the signaling includes a field for indicating a symbol position of the SRS transmission.
33. The device according to claim 32, wherein

    The upper layer RRC signaling configures the SRS transmission time domain location or the candidate time domain location, and the physical layer DCI signaling triggers the SRS time domain location configured by the high layer RRC signaling or the candidate time domain location takes effect; or

    The SRS time domain location or the candidate time domain location configured by the upper layer RRC signaling is configured as soon as it is configured; or

    The SRS time domain location or the candidate time domain location configured by the upper layer RRC signaling is valid in the downlink subframe or the uplink transmission burst.
34. The device according to claim 32, wherein

    Physical layer DCI signaling carries a symbol location field for indicating SRS transmission; or

    The first physical layer DCI signaling triggers the SRS transmission, and the second physical layer DCI signaling indicates the symbol position of the SRS transmission.
35. The apparatus according to claim 34, wherein the first physical layer DCI signaling triggers an SRS transmission, including:

    The first physical layer DCI signaling carries a field for triggering SRS transmission, where the field for triggering the SRS transmission includes: triggering one SRS transmission, or multiple SRS transmission.
36. The apparatus of claim 28, wherein the symbol location for transmitting the SRS is determined by the implicit convention, including at least one of the following:

    Determining, according to the number of symbols remaining in the subframe at the end of the downlink transmission burst, a symbol position for transmitting the SRS;

    Listening to the moment when the LBT mechanism is successfully executed determines the symbol position for transmitting the SRS;

    The symbol location for transmitting the SRS is determined in a manner agreed by the base station and the UE in advance.
37. The apparatus according to any one of claims 27 to 36, further comprising: a second determining module configured to determine a time domain subframe to which the symbol position for transmitting the SRS belongs by at least one of the following manners Location or candidate time domain subframe position:

    The way of configuring by high-level RRC signaling;

    The way of configuring through physical layer DCI signaling;

    A combination of high-level RRC signaling and physical layer DCI signaling;

    A method of combining N times physical layer DCI signaling, where N is an integer greater than or equal to 1;

    By implicit agreement;

    The way agreed by the base station and the UE in advance.
38. The apparatus according to claim 37, wherein the second determining module is configured to determine the time domain subframe position or the candidate time domain subframe position by means of a high layer RRC signaling configuration, including:

    Determining, by the high layer RRC signaling, parameters for SRS transmission to determine the time domain subframe position or the candidate time domain subframe position; or

    The parameters for SRS transmission configured by the upper layer RRC signaling are effective immediately upon configuration; or,

    The parameters for SRS transmission configured by the upper layer RRC signaling are valid during the uplink transmission burst;

    The parameter for SRS transmission includes at least one of the following: period, offset, transmission comb, cyclic shift, symbol index of LBT, time domain pattern of SRS transmission, time window of SRS transmission, time window Internal offset, time window interval, start position of SRS transmission time window, one transmission, multiple transmission.
39. The apparatus according to claim 37, wherein the second determining module is configured to determine the time domain subframe position or the candidate time domain subframe position by means of physical layer DCI signaling configuration, including the following At least one:

    The physical layer DCI signaling that triggers the SRS transmission is sent on the subframe n, and the time domain subframe position or the candidate time domain subframe position is determined according to a predetermined timing relationship;

    The physical layer DCI signaling carries a field indicating the time domain subframe position or the candidate time domain subframe position, and determining the time domain subframe position or the candidate time domain subframe position according to the field.
40. The apparatus according to claim 37, wherein the second determining module is configured to determine the time domain subframe position or the candidate time by means of high layer RRC signaling and physical layer DCI signaling combined configuration The domain subframe position, including at least one of the following:

    The high-layer RRC signaling configures parameters for SRS transmission, and the parameters for the SRS transmission configured by the physical layer DCI signaling triggering the high-layer RRC signaling are valid;

    The high layer RRC signaling configures at least one of parameters for SRS transmission, and the physical layer DCI signaling configures parameters of the unconfigured SRS transmission of the upper layer RRC signaling;

    The high-layer RRC signaling configures at least one of the parameters for the SRS transmission, where the physical layer DCI signaling carries a field indicating a time domain subframe position of the SRS transmission or the candidate time domain subframe position, according to the field Determining the time domain subframe position or the candidate time domain subframe position for SRS transmission;

    The high layer RRC signaling configures at least one of the parameters used for the SRS transmission, and the physical layer DCI signaling triggers the SRS transmission;

    The high layer RRC signaling configures at least one of parameters for SRS transmission, and the physical layer DCI signaling triggers determining the time domain subframe position or the candidate time domain subframe position for SRS transmission according to a predetermined timing relationship;

    The high layer RRC signaling configures at least one of parameters for SRS transmission, the physical layer DCI signaling triggers the SRS transmission, and determines the time domain subframe position or the candidate time domain for SRS transmission according to a predetermined timing relationship. Frame position

    Wherein, the parameter used for SRS transmission includes at least one of the following: a period, an offset, Transmission comb, cyclic shift, LBT symbol index, SRS transmission time domain pattern, SRS transmission time window, time window offset, time window interval, SRS transmission time window starting position, one transmission, Multiple transfers.
41. The apparatus according to claim 37, wherein the second determining module is configured to determine the time domain subframe position or the candidate time domain subframe position by combining N times physical layer DCI signaling , including at least one of the following:

    The time domain subframe position or the candidate time domain subframe position of the SRS transmission is configured by the first physical layer DCI signaling, and the information of the first physical layer DCI signaling configuration is enabled by the second physical layer DCI signaling;

    Configuring the time domain subframe position or the candidate time domain subframe position of the SRS transmission by the first physical layer DCI signaling to trigger the SRS transmission by using the second physical layer DCI signaling;

    Configuring the time domain subframe position or the candidate time domain subframe position of the SRS transmission by the first physical layer DCI signaling, enabling the information of the first physical layer DCI signaling configuration and triggering the SRS transmission by using the second physical layer DCI signaling;

    SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is indicated by the second physical layer DCI signaling;

    The SRS transmission is triggered by the first physical layer DCI signaling, and the time domain subframe position or the candidate time domain subframe position of the SRS transmission is determined according to a predetermined timing relationship by using the second physical layer DCI signaling;

    Determining, by the first physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship, and triggering the SRS transmission by using the second physical layer DCI signaling;

    Determining, by the first physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship, and triggering the first physical layer by using the second physical layer DCI signaling The time domain subframe position of the SRS transmission determined by the DCI signaling or the candidate time domain subframe position is enabled;

    Determining, by the first physical layer DCI signaling, the time domain subframe position or the candidate time domain subframe position of the transmission SRS according to a predetermined timing relationship, triggering the SRS transmission and triggering the first by the second physical layer DCI signaling The time domain subframe position or the candidate time domain subframe position of the SRS transmission determined by the physical layer DCI signaling is enabled.
42. The apparatus of any one of claims 39 to 41, wherein the predetermined timing relationship comprises:

    n+k; or,

    n+k1;

    Where n is the subframe number sent by the physical layer DCI signaling that triggers the SRS transmission; k is a positive integer greater than or equal to 4; k1 is a positive integer greater than or equal to 0.
43. The apparatus according to claim 42, wherein said k or k1 is obtained by at least one of:

    High-level RRC signaling configuration; physical layer DCI signaling indication; base station and UE agreed in advance.
44. The apparatus of any of claims 30, 32, 33, 34, 35, 37, 39, 40, 41, wherein the physical layer DCI signaling comprises one of:

    UE proprietary DCI signaling, using DCI format 0/4;

    Public DCI signaling, using DCI format 1C;

    Group downlink control information Group DCI signaling, using DCI format 3/3A;

    Downlink downlink control information DL DCI signaling, using DCI format 1A/2A/2B/2C;

    New DCI signaling.
45. The apparatus according to claim 37, wherein said second determining module is configured to determine said time domain subframe position or said candidate time domain subframe position of said SRS transmission by implicit agreement, including At least one of the following:

    After the downlink transmission burst ends, the SRS parameter configured by the upper layer RRC signaling or the time domain subframe position or the candidate time domain subframe position of the SRS transmission explicitly indicated by the physical layer DCI signaling is enabled;

    The last partial subframe after the downlink transmission burst;

    After the downlink transmission burst, the first uplink subframe;

    After the downlink transmission burst, the second uplink subframe;

    After the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an even-numbered subframe;

    After the downlink transmission burst, the uplink subframe index in the uplink transmission burst is an odd-numbered subframe;

    The first uplink subframe in the uplink transmission burst;

    The second uplink subframe in the uplink transmission burst;

    The uplink subframe index in the uplink transmission burst is an even-numbered subframe;

    The uplink subframe index in the uplink transmission burst is an odd-numbered subframe;

    The SRS parameter includes at least one of the following: a period, an offset, a transmission comb, a cyclic shift, a symbol index of the LBT, a time domain pattern of the SRS transmission, a time window of the SRS transmission, and an offset within the time window. , time window interval, start position of SRS transmission time window, one transmission, multiple transmission.
46. A device according to any one of claims 37 to 45, wherein

    a time domain subframe position or a candidate time domain subframe position information for indicating SRS transmission, and symbol position information for indicating SRS transmission in the same physical layer DCI signaling, or a DCI signal at a different physical layer Order.
47. The apparatus of any one of claims 27 to 46, wherein the first transmission module is configured to transmit the SRS at the determined symbol position, comprising:

    Different user equipment UEs are transmitted in the same time domain symbol position;

    Different UEs are transmitted in different time domain symbol locations;

    Different UEs are transmitted in the same candidate time domain symbol position;

    Different UEs are transmitted at different candidate time domain symbol locations.
48. The apparatus according to claim 47, wherein, when different UEs are transmitted on the same time domain symbol position or candidate time domain symbol position, at least one of multiplexing is performed by: different transmission comb mode multiplexing, Cyclic shift mode multiplexing.
49. The apparatus of claim 47, wherein transmitting the same or different candidate time domain symbol locations by different UEs comprises:

    Stopping other time domain symbol position transmissions other than the predetermined time domain symbol position in the candidate time domain symbol position if a predetermined time domain symbol position in the candidate time domain symbol position transmits the SRS successfully The SRS; or,

    And transmitting, in the candidate time domain symbol position, other time domain symbol position transmissions other than the predetermined time domain symbol position, in a case where the predetermined time domain symbol position of the candidate time domain symbol position transmits the SRS successfully The SRS.
50. The apparatus of claim 47, further comprising:

    An execution module, configured to perform an LBT mechanism after the different UEs transmit in the same or different symbol positions, where the first transmission module is at the symbol position if the LBT mechanism is successful Transmitting the SRS.
51. The apparatus of claim 50, wherein when the symbol position is a candidate time domain symbol position, the execution module is set to:

    The same or different LBT mechanisms are used for different candidate time domain symbol positions, wherein the LBT mechanism executed before the previous candidate time domain symbol position is earlier than the LBT mechanism performed before the latter candidate time domain symbol position when different LBT mechanisms are used Simplify, or have a shorter competition window.
52. The apparatus according to any one of claims 27 to 51, further comprising: a satisfaction module,

    Set to meet the regulatory requirements for SRS transmission bandwidth to account for at least 80% of the total bandwidth in at least one of the following ways:

    By repeating the manner in which the SRS occupies a predetermined number of times of the bandwidth N, by increasing the length of the SRS sequence, by increasing the manner of the transmission comb, by modifying the subcarrier spacing, the frequency domain frequency hopping method is used to pass the resource. The way of block interleaving is done by block interleaving.
53. A user equipment UE comprising the apparatus of any one of claims 27 to 52.
54. A storage medium, the storage medium being arranged to store program code for performing the signal transmission method according to any one of claims 1 to 26.

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