WO2013163816A1

WO2013163816A1 - Method for receiving and sending sounding reference signal, network side device and user equipment

Info

Publication number: WO2013163816A1
Application number: PCT/CN2012/075096
Authority: WO
Inventors: 周明宇; 任晓涛
Original assignee: 华为技术有限公司
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2013-11-07
Also published as: CN103548404A

Abstract

Embodiments of the present invention provide a method for receiving and sending a sounding reference signal (SRS), a network side device and a user equipment (UE). The receiving method comprises: a network side device sending edge frequency band sounding information to a UE, so as to make the UE send a first SRS on an edge frequency band of the system bandwidth and at a first frequency granularity, the first frequency granularity being different from a frequency granularity used by the UE for sending a second SRS on a center frequency band of the system bandwidth; the network side device receiving the first SRS sent by the UE on the edge frequency band and at the first frequency granularity. The technical solution of the present invention solves the problem of transmitting the SRS on the edge frequency band, and improves transmission efficiency on the edge frequency band.

Description

Sounding reference signal receiving, transmitting method, network side device and user equipment

The present invention relates to communications technologies, and in particular, to a sounding reference signal receiving and transmitting method, a network side device, and a user equipment. Background technique

In the prior art, the network side device may send scheduling signaling to a User Equipment (UE), allocate a partial frequency band in the entire system bandwidth for the UE, and enable the UE to send an uplink data signal on the allocated partial frequency band. If the channel conditions corresponding to the part of the frequency band allocated by the network side device for the UE are better, the information can be transmitted with a higher transmission efficiency scheme, which is beneficial to improving system performance. In order to enable the network side device to learn the channel status of the system bandwidth corresponding to the UE, the network side device usually sends configuration parameters of the Sounding Reference Signal (SRS) to the UE, and after receiving the UE, the SRS is sent according to the configuration parameters. After receiving the SRS sent by the UE, the network side device can learn the uplink channel state information (CSI) by detecting the SRS.

In the prior art, the edge band of the system bandwidth is used for transmission control signaling, such as a Physical Uplink Control Channel (PUCCH) in a Long Term Evolution (LTE) system, and only the center band is used. For transmitting data signals, such as Physical Uplink Shared Channel (PUSCH) in an LTE system. Since the UE sends the SRS in order to let the network side device learn the uplink CSI to more efficiently schedule the UE to transmit the uplink data, the UE only needs to transmit the SRS on the central frequency band.

As technology advances, a new type of carrier has emerged. The UE does not transmit control signaling on the new type of carrier, but transmits control signaling corresponding to the new type of carrier on other carriers. Therefore, in a new type of carrier, the edge band can be used to transmit data signals. However, since the network side device can only acquire the channel condition of the partial bandwidth by detecting the SRS transmitted by the UE on the central frequency band, the channel condition of the edge frequency band cannot be obtained, so that the network side device cannot accurately transmit the data signal of the UE on the edge frequency band. Scheduling results in very low transmission efficiency over these bands. SUMMARY OF THE INVENTION The present invention provides a sounding reference signal receiving and transmitting method, a network side device, and a user equipment, which are used to improve the accuracy of scheduling of data signals transmitted by a network side device on an edge frequency band by a network side device, and improve transmission on an edge frequency band. effectiveness.

An aspect of the present invention provides a method for receiving a sounding reference signal, including:

The network side device sends the edge frequency band detection information to the user equipment UE, so that the UE sends the first sounding reference signal at the first frequency granularity on the edge frequency band of the system bandwidth; the first frequency granularity and the UE are in the The frequency of the second sounding reference signal used in transmitting the central frequency band of the system bandwidth is different;

The network side device receives the first sounding reference signal sent by the UE on the edge frequency band at the first frequency granularity.

An aspect of the present invention provides a network side device, including:

a first transmitter, configured to send edge band detection information to the user equipment UE, so that the UE sends the first sounding reference signal at a first frequency granularity on an edge frequency band of the system bandwidth; the first frequency granularity and the The frequency granularity used by the UE to transmit the second sounding reference signal on the central frequency band of the system bandwidth is different;

And a first receiver, configured to receive, by the UE, the first sounding reference signal that is sent by using the first frequency granularity on the edge frequency band.

Another aspect of the present invention provides a method for transmitting a sounding reference signal, including:

The user equipment UE receives the edge frequency band detection information, where the edge frequency band detection information is sent by the network side device, and is used to indicate that the UE sends the first sounding reference signal at the first frequency granularity on the edge frequency band of the system bandwidth; a frequency granularity is different from a frequency granularity used by the UE to transmit a second sounding reference signal on a center frequency band of the system bandwidth;

Transmitting, by the UE, the first sounding reference signal at the first frequency granularity on the edge frequency band.

Another aspect of the present invention provides a user equipment, including:

a second receiver, configured to receive the edge frequency band detection information, where the edge frequency band detection information is sent by the network side device, and is used to indicate that the UE sends the first sounding reference signal at a first frequency granularity on an edge frequency band of the system bandwidth. The first frequency granularity is different from a frequency granularity used by the UE to transmit a second sounding reference signal on a center frequency band of the system bandwidth; a second transmitter, configured to send the first sounding reference signal at the first frequency granularity on the edge frequency band.

A method for receiving a sounding reference signal and a network side device are provided by an aspect of the present invention. The network side device sends the edge band sounding information to the UE on the edge frequency band, so that the UE sends the sounding reference on the edge frequency band different from the UE in the center frequency band. The frequency granularity of the signal is sent to the sounding reference signal, and the sounding reference signal transmitted by the UE on the edge frequency band is received, and then the data signal transmitted by the UE on the edge frequency band is scheduled according to the sounding reference signal on the edge frequency band, thereby improving scheduling accuracy. The transmission efficiency on the edge band is improved.

According to another aspect of the present invention, a method for transmitting a sounding reference signal and a user equipment, the UE receives edge frequency band detection information sent by a network side device on an edge frequency band, and is different from the center frequency band according to the received edge frequency band detection information. The frequency granularity of the sounding reference signal is transmitted on the frequency band to send the sounding reference signal, so that the network side device can schedule the data transmission of the UE on the edge frequency band according to the sounding reference signal sent by the UE on the edge frequency band, thereby improving scheduling accuracy and improving The transmission efficiency on the edge band. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

FIG. 1A is a schematic diagram of system bandwidth allocation in an existing LTE system; FIG.

1B is a schematic diagram of resource usage states on a PRB in an existing LTE system;

2 is a flowchart of a method for receiving an SRS according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for sending an SRS according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a network side device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a UE according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a UE according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the following will be combined with the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the drawings, and the embodiments are described as a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the prior art, system bandwidth is divided into several physical resource blocks (Physical Resource).

Block, PRB), for example, in an LTE system, one PRB includes 12 subcarriers, and a 10 MHz system bandwidth is divided into 50 PRBs. The UE may transmit uplink control signaling signals, such as PUCCH in the LTE system, or data signals, such as PUSCH in the LTE system, on these PRBs according to the configuration and scheduling of the network side devices. As shown in Figure A1, in the entire system bandwidth, the network side device configures two PRBs on the edge (that is, the PRBs numbered 0 and 49 in Figure 1A) for transmitting PUCCH, and the PRB located at the center of the system bandwidth (that is, the number in Figure 1A). The PRB of 1-48 is used to transmit the PUSCH. As shown in FIG. 1B, the length of time that the UE sends the PUCCH or the PUSCH on each PRB is in units of Transmission Time Interval (TTI), and the length of one ΤΤΙ is 1 ms, including 14 symbols (in FIG. 1B). One column indicates a symbol); for the PUSCH, the symbols numbered 3 and 10 are used to transmit the DM RS, which facilitates the network side device to acquire the uplink channel fading by detecting the DM RS, thereby detecting the data signal; the network side device can schedule the UE to The data signal is transmitted on the PRB of the system bandwidth center.

The network side device sends the SRS configuration information to the UE, and the configuration information carries the frequency band allocated by the network side device for the UE to send the SRS, in order to make the network side device make a reasonable scheduling. Time, orthogonal code and other information. After receiving the configuration information sent by the network side device, the UE periodically sends the SRS according to the indication of the configuration information. In LTE systems, these SRSs are typically sent on the last one or two symbols of the PRB. Since the purpose of the SRS for the UE to send the SRS is to enable the network side device to learn the uplink CSI, in order to properly schedule the data transmission for the UE, the UE only needs to use the frequency band that can be used for transmitting the data signal (for example, the PRB transmitting the PUSCH in FIG. 1A). ) Send SRS on it. That is to say, in the prior art, the total bandwidth detected by the SRS sent by the UE does not involve the edge bandwidth in the system bandwidth, that is, the edge PRB. As shown in FIG. 1A, the system bandwidth includes 50 PRBs, where 2 PRBs of the edge are used to transmit the PUCCH, so that the middle 48 PRBs can be used to transmit the PUSCH, and the total bandwidth of the SRS probe is the middle 48 PRBs, excluding 2 PRBs on the edge. Due to this consideration of the prior art, the UE does not need to transmit the SRS on the edge band. With the advancement of technology, a new type of carrier has emerged, in which the UE does not transmit the PUCCH on the carrier, but transmits the control signaling corresponding to the new type of carrier on other carriers. That is, in a new type of carrier, the edge carrier can be used to transmit the PUSCH. However, in the prior art, the network side device can only obtain the channel condition of the edge PRB by detecting the channel condition of the SRS of the center PRB sent by the UE on the central frequency band, so that the network side device cannot be on the edge of the UE. The PUSCH transmitted on the PRB is accurately scheduled, so that the transmission efficiency on the edge PRB is low.

In the prior art, the network side device sets a frequency granularity for the SRS of the UE. In the LTE system, the frequency granularity of the SRS transmitted by the UE on the central frequency band is 4 PRBs. For example, in FIG. 1A, the network side device can only Configuring the UE to send the SRS on the integer multiple of the four PRBs, that is, at 4.

SRS is sent on 8, 12, 16 or 48 PRBs. As shown in FIG. 1A, there may be only two PRBs in the edge band, that is, one PRB on the upper and lower edges. In the prior art, the frequency granularity of the SRS sent by the UE is four PRBs. It can be seen that the method of transmitting SRS in the prior art cannot directly use the SRS in the edge band.

To this end, the embodiment of the present invention provides a method for solving the above problems. The method specifically includes: the network side device sends the edge band detection information to the UE, and is configured to control the UE to send the SRS on the edge frequency band of the system bandwidth with a frequency granularity different from the UE transmitting the SRS on the central frequency band of the system bandwidth; The SRS sent by the UE is received. For the UE, the UE receives the edge band detection information, and according to the edge band detection information, transmits the SRS on the edge band of the system bandwidth at a frequency granularity different from that of transmitting the SRS on the center band. It can be seen that the embodiment of the present invention can enable the UE to send the SRS on the edge frequency band, and after receiving the SRS sent by the UE in the edge frequency band, the network side device can obtain the uplink CSI of the edge frequency band, so that the UE is on the edge frequency band. The data signal is transmitted for accurate scheduling, which improves the transmission efficiency on the edge band.

In addition, the method provided by the embodiment of the present invention has better compatibility, that is, the UE in the prior art.

The design of the SRS is sent by the UE on the central frequency band. The method provided by the embodiment of the present invention enables the network side device to obtain the uplink CSI of the edge frequency band. For example, the UE may use the prior art to transmit the SRS only on the central frequency band, or the UE may use the method provided by the embodiment of the present invention to transmit the SRS only on the edge frequency band, or the UE may transmit the SRS on the central frequency band by using the prior art. At other times, the SRS is transmitted on the edge band using the method provided by the embodiment of the present invention. It is noted that in the embodiment of the present invention, when the UE transmits the SRS on the edge band, it still transmits on the last one or two symbols of a frame to avoid interference with other signals.

The network side device in the embodiments of the present invention may be a base station (BS), an access point (AP), a remote radio equipment (RRE), and a remote radio port ( Remote Radio Head (RRH), Remote Radio Unit (RRU), or Relay Node.

The following embodiments of the present invention will explain the technical solutions of the present invention in detail.

FIG. 2 is a flowchart of a method for receiving an SRS according to an embodiment of the present invention. As shown in FIG. 2, the method of this embodiment includes:

Step 201: The network side device sends the edge band detection information to the UE, so that the UE sends the first SRS at the first frequency granularity on the edge frequency band of the system bandwidth, where the first frequency granularity is sent by the UE on the central frequency band of the system bandwidth. The second SRS uses different frequency granularities.

Step 202: The network side device receives, by the UE, a first sounding reference signal that is sent by the UE at the first frequency granularity on the edge frequency band.

In this embodiment, the first frequency granularity may be preset. For example, the network side device is

The UE configures to transmit the first frequency granularity used by the first SRS on the edge frequency band, and advertises the first frequency granularity to the UE. The first frequency granularity is different from the frequency granularity used by the UE to transmit the second SRS on the central frequency band.

In the embodiments of the present invention, for convenience of description, the SRS transmitted by the UE on the edge band is referred to as a first SRS, and the SRS transmitted by the UE in the center band is referred to as a second SRS.

In this embodiment, by transmitting the first SRS on the edge band using a frequency granularity different from transmitting the second SRS on the center frequency, the method in which the UE cannot use the prior art to transmit the second SRS on the center band is solved. The problem of transmitting the first SRS on the edge band enables the UE to send the first SRS on the edge band, so that the network side device can obtain the CSI on the edge band according to the first SRS sent by the UE on the edge band, and then obtain the CSI based on the acquired The CSI on the edge band accurately schedules the data transmitted by the UE on the edge band, improving the transmission efficiency on the edge band. In addition, the present embodiment transmits the first SRS on the edge band based on the frequency granularity different from the frequency at which the second SRS is transmitted on the center frequency, and can be flexibly applied in various complicated system bandwidths. For example, in the case of FIG. 1A, the edge band has only two PRBs, that is, one PRB for each of the upper and lower edges, and the frequency granularity of the second SRS sent by the UE in the prior art is four PRBs, and is sent on the center frequency if using the prior art. The frequency granularity of the second SRS is that the first SRS cannot be sent on the edge frequency band, and the frequency granularity used when the first SRS is sent on the edge PRB in this embodiment may be 1 PRB, thereby solving the problem of sending the first on the edge PRB. The problem with SRS.

Optionally, the network side device sends the edge frequency band detection information to the UE, so that the network side device and the UE may preset the edge frequency band as the system bandwidth before the UE sends the first SRS in the first frequency granularity on the edge frequency band of the system bandwidth. In addition to the UE transmitting bandwidth outside the full bandwidth corresponding to the second SRS on the central frequency band of the system bandwidth.

Specifically, in the prior art, the network side device sends an SRS full bandwidth configuration number to the UE, and the UE determines, according to the mapping relationship between the SRS full bandwidth configuration number and the central frequency band SRS full bandwidth, that the UE sends the second SRS in the central frequency band. Full bandwidth. As shown in Table 1, if the network side device sends the second SRS full bandwidth configuration number to the UE, the UE determines that the full bandwidth corresponding to the second SRS is 48 PRBs. Each time the frequency bandwidth of the second SRS is set to 4 PRBs and the frequency hopping of the SRS is enabled, the UE needs to send the second SRS at 12 different times to detect the CSI of 48 PRBs in the full bandwidth. If the network side device sends the SRS full bandwidth configuration number to the UE, the UE determines that the full bandwidth of the second SRS is 36 PRBs. In this case, if the network side device configures the UE to send the second SRS frequency each time. If the bandwidth is 4 PRBs and the SRS hopping is enabled, the second SRS needs to be sent at 9 different times to detect the CSI of 36 PRBs in the full bandwidth.

Table 1

SRS full bandwidth configuration number Center band SRS full bandwidth corresponding PRB number

0 48

1 48

2 40

3 36

4 32

5 24

6 20 In this embodiment, after the network side device sends the SRS full bandwidth configuration number to the UE, the UE can determine the edge frequency band according to the system bandwidth and the SRS full bandwidth number. For example, when the system bandwidth is 50 PRBs, if the network side device sends the SRS full bandwidth configuration number to the UE, the UE can determine that the edge bandwidth is the outermost two PRBs of the system bandwidth, specifically, the upper and lower edge frequency bands. If the network side device sends the SRS full bandwidth configuration number to the UE, the UE can determine that the edge bandwidth is the outermost 14 PRBs of the system bandwidth, specifically, the upper and lower edge bands each have 7 PRBs. The advantage of the network side device and the UE pre-setting the edge band is that the network side device does not need to add new signaling to notify the bandwidth of the UE edge band, which can save signaling overhead. It is explained here that the above system bandwidth can be notified to the UE by the network side device through other signaling.

Optionally, the network side device sends the edge band detection information to the UE, so that the network side device may send the edge band information to the UE, so that the UE sends the first SRS on the edge frequency band of the system bandwidth. The edge band is determined from the system bandwidth.

The edge band information includes, but is not limited to, the number of PRBs included in the edge band, the number of PRBs included in the upper edge band in the edge band, the number of PRBs included in the lower edge band in the edge band, or the configuration number of the edge band.

For example, the network side device sends the edge band information to the UE, and notifies the UE that the edge band includes two PRBs, and after receiving the UE, it determines that the outermost two PRBs of the system bandwidth are edge bands. Alternatively, the network side device transmits the edge band information to the UE, and notifies the UE of the number of PRBs included in the upper edge band or the lower edge band. Alternatively, the network side device and the UE preset a plurality of edge frequency bands and corresponding configuration numbers, and the network side device sends the edge frequency band information to the UE, and notifies the UE of the configuration number of the edge frequency band. For example, Table 2 shows an alternative correspondence between the edge band configuration number and the number of PRBs included in the edge band.

Table 2

Edge Band Configuration Number Number of PRBs included in the edge band

0 2

1 2

2 8

3 12 4 16

5 24

6 28

7 32, based on the foregoing Table 2, if the edge band configuration number sent by the network side device to the UE is 3, indicating that the edge frequency band includes 12 PRBs, the UE may determine that the outermost 12 PRBs of the system bandwidth are edge frequency bands; If the edge band configuration number sent by the device to the UE is 0 or 1, the edge band includes 2 PRBs, and the UE can determine that the outermost two PRBs of the system bandwidth are edge bands.

Optionally, in the embodiment of the present invention, the UE may use a parameter that is used to indicate that the UE sends the second SRS on the central frequency band, and sends the first SRS on the edge frequency band. The parameters indicating that the UE sends the second SRS on the central frequency band include a transmission time, an antenna port, an orthogonal code resource, and a comb. That is to say, the edge band sounding information sent by the network side device to the UE includes some or all configuration parameters for the UE to send the second SRS on the center frequency band.

In the prior art, the network side device sends the configuration information of the second SRS to the UE, and is used to indicate the parameters used by the UE to send the second SRS on the central frequency band, which specifically includes: 1. The sending time, for example, the UE sends the second SRS. The number of antenna ports, for example, the number of antenna ports, for example, the UE sends the second SRS through 1, 2 or 4 antenna ports; 3. The orthogonal code resource, for example, the orthogonal code used by the UE to send the second SRS, where different UEs Using different orthogonal codes, it is ensured that there is no interference between each other. For example, in an LTE system, the UE generates a second SRS by cyclically shifting a base sequence. In the LTE system, the network side device sends signaling to the UE. In order to set the Cyclic Shift (CS) value used by the UE to generate the second SRS, different UEs transmitting the second SRS on the same bandwidth are set with different CS values to ensure that the second SRSs they send are not between each other. Interference, where the CS value is the orthogonal code; 4, comb: For example, in the LTE system, the network side device can set the comb tooth to 0 or 1 for the UE, and different UEs can be assigned different comb teeth. To ensure that no interference between them. For example, as shown in FIG. 1B, the UE sends the second SRS by using the comb to be 1, that is, the UE sends the second SRS on the subcarriers with the odd number.

Optionally, the reuse of the configuration parameter for transmitting the second SRS on the edge frequency band may be pre-agreed by the network side device and the UE. Optionally, the reuse of the configuration parameter for transmitting the second SRS on the edge frequency band may be: the network side device notifies the UE by signaling before receiving the UE sending the first SRS on the edge frequency band at the first frequency granularity. of.

In this embodiment, the parameter used to instruct the UE to send the second SRS on the central frequency band is reused, so that the UE can use the UE to send some or all configuration parameters used by the second SRS on the central frequency band, and the first in the edge frequency band. The frequency granularity sends the first SRS. For the network side device, the UE may receive the first SRS sent by the UE using the UE to transmit some or all configuration parameters of the second SRS on the central frequency band and transmit the first frequency in the edge frequency band. Therefore, it is not necessary to introduce more signaling for transmitting the edge band configuration information for the first SRS transmitted on the edge band, which is advantageous for reducing signaling overhead.

For the UE, in addition to transmitting the first SRS on the edge frequency band by using the transmission time of transmitting the second SRS on the central frequency band, the first SRS may be sent by using the transmission time provided by the following manners.

Optionally, the network side device sends the edge band detection information to the UE in a dynamic signaling manner on the TTI numbered n, so that the UE sends the first edge frequency on the edge frequency band in at least one TTI after the TTI numbered n. SRS. Then, the UE receives the edge band detection information that is sent by the network side device in the manner of dynamic signaling on the TTI numbered n, and sends the first SRS on the edge band in at least one TTI after the number n.

In the communication system, the signaling sent by the network side device to the UE includes semi-static signaling and dynamic signaling. The dynamic signaling is characterized in that: after receiving the dynamic signaling, the UE only applies the information included in the dynamic signaling to a limited one or more signal transmission process.

For example, the network side device sends the edge band detection information to the UE by using dynamic signaling on the TTI numbered n, and after receiving the UE, the first SRS is sent once on the port numbered n+4, or at the number n+ The first SRS is transmitted on each of the plurality of TTIs such as 4 and n+5.

The foregoing method for transmitting the edge band detection information to the UE by using the dynamic signaling may require the different UEs to send the first SRS on the edge frequency band on different TTIs, so that more UEs can be acquired. Corresponding CSI on the edge band. For example, if the network side device sends the edge band detection information to the UE1 on the TTI numbered 1, the UE1 sends the first SRS on the edge band on the port numbered 5; the network side device on the TTI numbered 6 UE2 sends the edge band detection information, then UE2 can be on the edge band on the number 10 Send the first SRS. In this way, the network side device can obtain the uplink CSI corresponding to the edge of the UE by using the first SRS on the two TTIs.

Optionally, the network side device may further send the edge band detection information to the UE in a semi-static manner, so that the UE periodically sends the first sounding reference signal on the edge frequency band. The edge band detection information includes period information indicating that the UE sends the first sounding reference signal on the edge frequency band.

The semi-static signaling is characterized in that: if the UE receives the semi-static signaling, the information included in the semi-static signaling is always used before the UE receives the new semi-static signaling or dynamic signaling.

In this embodiment, the network side device sends the semi-static signaling to the UE, where the UE sends the periodic information of the first SRS on the edge frequency band, and the UE periodically periodically follows the edge frequency band after receiving the semi-static signaling. The first SRS is sent on. For example, if the period information sent by the network side device to the UE is 5 ΤΉ indicating that the UE sends the first SRS on the edge frequency band, the UE is on the TTI numbered 0, 5, 10, etc., which is a multiple of 5. The first SRS is transmitted on the edge band.

Further, the foregoing edge band detection information may include, in addition to the period information indicating that the UE sends the first SRS on the edge frequency band, time offset information, where the time offset information is used to indicate that the UE is offset from the information according to the time offset. The shifted ΤΉ begins to periodically transmit the first SRS on the edge band. For example, the network side device sends a semi-static signaling to the UE to indicate that the UE sends the first SRS on the edge band to a period of 5 TTIs, and the time offset is 2 TTIs, and the UE is numbered 2, 7, and 12. The first SRS is transmitted on the edge band.

In this embodiment, the method for transmitting the edge band detection information to the UE by using the semi-static signaling may control the UE to periodically send the first SRS on the edge frequency band by using one signaling, which can reduce the signaling overhead.

Further, optionally, the network side device may further indicate that the UE sends the first SRS in the upper and lower edge frequency bands before the first SRS sent by the UE in the edge frequency band.

For example, the network side device may send the first start edge indication information to the UE to indicate that the UE sends the first sounding reference signal on the edge frequency band by using the upper edge frequency band in the edge frequency band as a transmission starting point.

In this implementation manner, after receiving the first start edge indication information sent by the network side device, the UE may send the first SRS for the first time on the upper edge frequency band (for example, the PRB numbered 49), and then in the lower edge frequency band ( For example, the first SRS is sent for the second time on the PRB with the number 0, and then the first SRS is sent for the third time on the upper edge band, and so on, that is, the upper edge band is sent. The starting point is sent, and the first SRS is transmitted in the upper edge band and the lower edge band in turn. For example, after receiving the first start edge indication information sent by the network side device, the UE may send the first SRS on the upper edge frequency band (for example, the PRB numbered 49) on the TTI numbered 0, and the number is On the TTI of 5, the first SRS is transmitted on the lower edge band (for example, the PRB numbered 0); on the TTI numbered 10, the first SRS is transmitted on the upper edge band (for example, the PRB numbered 49), ... and so on, the above edge band is the transmission starting point, and the first SRS is transmitted in the upper edge band and the lower edge band in turn.

In this embodiment, the UE transmits the first SRS only on the upper edge band or the lower edge band, and does not simultaneously transmit the first SRS on the two edge bands, so that the PAPR of the signal transmitted by the UE can be reduced.

For another example, the network side device may send the second start edge indication information to the UE, to indicate that the UE sends the first sounding reference signal on the edge frequency band by using the lower edge frequency band in the edge frequency band as a transmission starting point.

In this implementation manner, after receiving the second start edge indication information sent by the network side device, the UE may send the first SRS for the first time on the lower edge frequency band (for example, the PRB numbered 0), and then the upper edge frequency band. (For example, the PRB numbered 49) sends the first SRS for the second time, and then sends the first SRS for the third time on the lower edge frequency band, and so on, that is, the following edge frequency band is the transmission starting point, and the rotation is under The first SRS is transmitted on the edge band and the upper edge band. For example, after receiving the second start edge indication information sent by the network side device, the UE may send the first SRS on the lower edge frequency band (for example, the PRB numbered 0) on the TTI numbered 0, and the number is On the TTI of 5, the first SRS is transmitted on the upper edge band (for example, the PRB numbered 49); on the TTI numbered 10, the first SRS is transmitted on the lower edge band (for example, the PRB numbered 0), ... and so on, the following edge band is the transmission starting point, and the first SRS is transmitted in the lower edge band and the upper edge band in turn.

In this embodiment, the UE transmits the first SRS only on the lower edge band or the upper edge band, and does not simultaneously transmit the first SRS on the two edge bands, so that the PAPR of the signal transmitted by the UE can be reduced.

For another example, the network side device may send upper and lower edge indication information to the UE, to indicate that the UE simultaneously transmits the first sounding reference signal on the upper edge frequency band and the lower edge frequency band in the edge frequency band.

After receiving the upper and lower edge indication information sent by the network side device, the UE sends the first SRS on the upper edge band and the lower edge band according to the upper and lower edge indication information.

In the above embodiment, the UE transmits the first SRS only on half of the edge frequency band, thus It is beneficial to reduce the PAPR to make full use of the transmission power of the UE. In this embodiment, the network side device sends the upper and lower edge indication information to the UE, and instructs the UE to simultaneously send the first SRS in the upper edge band and the lower edge band, which facilitates the network side device to quickly acquire the uplink CSI on the two edge bands. In particular, for those UEs that are less affected by the PAPR, such as UEs in the cell center, the first SRS is transmitted on the upper and lower edge frequency bands, which is not affected by the high PAPR, and is beneficial to the network side equipment. Get the uplink CSI of the two edge bands quickly.

It is noted herein that in various embodiments of the present invention, the first frequency granularity is different from the frequency granularity at which the UE transmits the second SRS on the central frequency band. Taking the frequency granularity of the second SRS transmitted by the UE on the central frequency band as 4 PRBs as an example, the first frequency granularity may be any non-zero integer number of PRBs other than 4, for example, 1, 2, 3, 5 or 6 PRBs, etc. . Preferably, the first frequency granularity is 1 PRB.

Further preferably, the first frequency granularity is smaller than a frequency granularity at which the UE transmits the second SRS for use on the central frequency band.

Optionally, the UE may send the first SRS on the last one or two symbols of the edge band. For the network side device, it can receive the first SRS sent by the UE on the last one or two symbols of the edge band.

Optionally, the UE may send the first SRS on all subcarriers that send the symbol of the first SRS, but is not limited thereto. For the network side device, it may receive the first SRS sent by the UE on all subcarriers for receiving the symbols of the first SRS on the edge frequency band.

Wherein, since the CSIs of the adjacent subcarriers are similar, the UE may send the first SRS on a part of the subcarriers of one symbol by combing. For the network side device, it may receive the first SRS sent by the UE on a part of the subcarriers for receiving the symbols of the first SRS on the edge frequency band. In doing so, it is possible to measure accurate CSI and to assign different combs to different UEs, thereby increasing the capacity of the first SRS. The capacity referred to herein refers to the number of UEs that transmit the first SRS while being supported on a specific symbol.

The format and generation process of the SRS transmitted by the UE on the edge band will be described in the following embodiments.

The foregoing embodiments of the present invention mainly describe how to enable a UE to transmit a first SRS on an edge frequency band from the perspective of a network side device. In the foregoing embodiments, the network side device sends the edge frequency band configuration information to the UE, so that the UE sends the first SRS on the edge frequency band, and then the uplink CSI on the edge frequency band is obtained according to the first SRS sent by the UE on the edge frequency band. UE on the edge band The data signal is transmitted for accurate scheduling, which improves the transmission efficiency on the edge band. The above embodiments are applicable to various application scenarios that need to detect CSI on an edge band.

FIG. 3 is a flowchart of a method for sending an SRS according to an embodiment of the present invention. As shown in FIG. 3, the method of this embodiment includes:

Step 301: The UE receives the edge band detection information, where the edge band detection information is sent by the network side device, and is used to indicate that the UE sends the first SRS in the first frequency granularity on the edge band of the system bandwidth. The first frequency granularity and the UE are in the system. The frequency granularity used to transmit the second SRS on the center band of the bandwidth is different.

Step 302: The UE sends the first SRS at the first frequency granularity on the edge frequency band.

The first SRS refers to the SRS sent by the UE on the edge frequency band, and the second SRS refers to the SRS sent by the UE in the central frequency band. The first SRS and the second SRS may be the same or different.

In this embodiment, the UE receives the edge band detection information sent by the network side device, and then sends the first SRS on the edge frequency band by using a frequency granularity different from that of transmitting the second SRS on the center frequency band according to the indication of the edge band detection information. The problem that the UE cannot transmit the first SRS on the edge frequency band by using the method for transmitting the second SRS on the central frequency band in the prior art is solved, so that the network side device can learn the edge frequency band according to the first SRS sent by the UE on the edge frequency band. The uplink CSI can further accurately schedule the data transmission of the UE on the edge frequency band, which is beneficial to improve the transmission efficiency on the edge frequency band.

The UE includes an operation of generating a first SRS before transmitting the first SRS on the edge frequency band at the first frequency granularity.

Optionally, an optional implementation manner of the UE generating the first SRS is: the UE is used to generate

The first SRS is generated by the DM RS or using the base sequence in the base sequence set used to generate the second SRS.

Wherein, the base sequence group includes a plurality of base sequences of different lengths. For example, the network side device instructs the UE to transmit a reference signal (Reference Signal, RS) of one PRB, and uses a base sequence of length 12 in the base sequence group; if the network side device instructs the UE to transmit RSs of 2 PRBs, the network side device uses a base sequence of length 24 in the base sequence set; these base sequences of different lengths correspond to the same base sequence Group, that is, the base sequence group corresponding to the same group number.

In the prior art, the uplink RS includes a DM RS in addition to the SRS. The second SRS of the DM RS and the center band may use different base sequence groups.

Based on the foregoing, the process of the UE generating the first SRS includes: the UE cyclically shifts the base sequence in the base sequence group used to generate the DM RS or used to generate the second SRS, and then generates the base sequence after the cyclic shift First SRS.

For example, as shown in FIG. 1B, the DM RS occupies all subcarriers, and the minimum sequence length of the DM RS can support one PRB, wherein the minimum sequence length is 12, so the UE can generate the DM RS by multiplexing. The first SRS transmitted by the UE on the edge band.

The process of the UE generating the DM RS includes: the UE performs cyclic shift on the sequence of length 12xN_prb, and then performs an inverse discrete Fourier transform (IDFT). Where N_prb represents the number of PRBs. The UE can use the same method to generate the first SRS that needs to be transmitted on the edge frequency band, that is, after the same base sequence is cyclically shifted, IDFT is obtained to obtain the first SRS. Based on the special design of the DM RS sequence in the current LTE system, when the network side device allocates different cyclic shifts to different UEs for the same PRB, the first SRSs sent by the UEs are orthogonal to each other, that is, mutual No interference. This allows multiple UEs to send the first SRS on the same PRB to increase the capacity of the first SRS.

In the above embodiment, the UE uses all subcarriers when transmitting the SRS in the edge band, so that the number of PRBs included in the edge band is not limited, for example, if the upper edge band or the lower edge band includes only one PRB, the UE needs to transmit the length. A sequence of 12, whereas a base sequence of length 12 is present in the prior art.

Further, in the case where the number of PRBs included in the edge band is a multiple of 4, the UE may also generate a first SRS that needs to be transmitted on the edge frequency by using a method of generating a second SRS transmitted on the center frequency in the prior art. This method belongs to the prior art and will not be described too much here.

It is explained here that since the number of PRBs included in the edge band is not necessarily a multiple of 4, the manner of generating the second SRS in the prior art is not applicable to any edge band. For example, assuming that the edge band has only 1 PRB (including 12 subcarriers), if one of the two combs is still used to generate the first SRS as in the prior art, the required base sequence has a length of 6, and the existing There is no base sequence of length 6 in the technology, which requires redesigning the base sequence. The UE and the network side device also need to re-store the base sequence of length 6, and then generate the first SRS based on the newly designed base sequence. In addition, The method for generating the second SRS in the prior art is still applicable to the edge band with a multiple of the number of PRBs. For example, if the edge band has only 2 PRBs (including 24 subcarriers), the length of the required base sequence is 12, and the existing There is a base sequence of length 12 in the technology, and the first SRS can also be generated by using the method of generating the second SRS in the prior art.

Further, before the UE sends the first SRS in the first frequency granularity on the edge frequency band, the method may further include: acquiring an operation of sending the orthogonal code resource used by the first SRS.

It is explained herein that the combo information may not be indicated for the UE, considering that the UE may use the first SRS for all subcarriers on the edge band. In order to enable multiple UEs to simultaneously send the first SRS on the same PRB, the network side device may allocate different orthogonal code resources to different UEs through signaling. The UE may obtain the orthogonal code resource used for sending the first SRS from the signaling sent by the network side device.

Further, in order to reduce signaling overhead, the UE may determine an orthogonal code for transmitting the first SRS on the edge frequency band according to orthogonal code resources and/or comb information allocated for transmitting the second SRS in the central frequency band. Resources. Specifically, the UE may generate orthogonal code resources used by the UE to send the first SRS on the edge frequency band according to the orthogonal code resource and/or comb information used by the UE to send the second SRS on the central frequency band.

Optionally, the UE generates, according to the following formula (1), formula (2) or formula (3), an orthogonal code resource used by the UE to send the first SRS on the edge frequency band.

CS_edge= ( CS— center + combx8 ) mod 12 ( 1 )

CS-edge=CS— center mod 12 ( 2 )

CS—edge: ( comb x 6 ) mod 12 ( 3 )

The CS_edge is an orthogonal code resource used by the UE to send the first SRS on the edge frequency band. The CS-center is an orthogonal code resource used by the UE to transmit the second SRS on the central frequency band. The comb is the comb information used by the UE to transmit the second SRS on the central frequency band. Mod represents the modulo operation.

After the acquiring the orthogonal code resource used by the UE to send the first SRS, the process of the UE transmitting the first SRS at the first frequency granularity on the edge frequency band specifically includes: the UE uses the orthogonal resource code to use the first frequency on the edge frequency band. The granularity sends the first SRS.

It can be seen from the above that the process of the UE transmitting the first SRS at the first frequency granularity on the edge frequency band may be: the UE sends the first SRS on the first frequency granularity on all subcarriers in the edge frequency band, but is not limited thereto. Optionally, an optional implementation manner of the UE receiving the edge band detection information includes: receiving, by the UE, the edge band detection information that is sent by the network side device in the dynamic signaling manner on the TTI numbered n.

Based on this, an optional implementation manner in which the UE sends the first SRS at the first frequency granularity on the edge frequency band includes: the UE sends the first SRS on the edge frequency band in at least one TTI after the TTI numbered n.

For example, the network side device sends the edge band detection information to the UE by dynamic signaling on the TTI numbered n, and after receiving the UE, the first SRS is sent once on the port numbered n+4, or the first time is sent multiple times. SRS.

In this implementation manner, the network side device sends the edge frequency band detection information by using dynamic signaling, and the UE sends the first SRS on the network specified by the dynamic signaling, although the dynamic signaling overhead required is large, but different UEs may be allowed. The first SRS is transmitted on the edge band on different TTIs, so that more CSIs corresponding to the UE on the edge band can be acquired.

Optionally, another optional implementation manner of the UE receiving the edge band detection information includes: receiving, by the UE, edge band detection information that is sent by the network side device in a semi-static manner, where the edge band detection information includes indicating that the UE sends the first on the edge frequency band. Cycle information of the SRS.

Correspondingly, another optional implementation manner that the UE sends the first SRS at the first frequency granularity on the edge frequency band includes: the UE periodically sends the first SRS on the edge frequency band according to the periodic information.

The semi-static signaling is characterized in that: after receiving the semi-static signaling, the UE uses the information included in the semi-static signaling before receiving the new semi-static signaling or dynamic signaling.

Further, the foregoing edge band detection information further includes: time offset information. And transmitting, by the UE, the first SRS periodically on the edge frequency band according to the period information, the method includes: the UE periodically transmitting the first SRS on the edge frequency band according to the period information, starting from a 偏移 offset according to the time offset information.

In this embodiment, the network side device sends semi-static signaling including the period information of the first SRS sent by the UE on the edge frequency band to the UE, and the UE periodically sends the edge frequency band after receiving the semi-static signaling. An SRS controls the UE to periodically transmit the first SRS on the edge frequency band by one signaling, which can reduce signaling overhead.

Optionally, the edge band detection information received by the UE includes the UE sending the second on the central frequency band. Some or all of the configuration parameters used by SRS.

Correspondingly, another embodiment of the UE transmitting the first SRS at the first frequency granularity on the edge frequency band includes: the UE transmitting some or all configuration parameters used by the second SRS on the central frequency band by using the UE, and using the first frequency parameter on the edge frequency band The first SRS is transmitted at a frequency granularity.

The parameters indicating that the UE sends the second SRS on the central frequency band include a transmission time, an antenna port, an orthogonal code resource, a comb, and the like. Accordingly, some or all of the above configuration parameters may be part or all of a transmission time, an antenna port, an orthogonal code resource, and a comb. For example, if the edge band sounding information only includes an antenna port indicating that the UE transmits the second SRS for use on the center frequency band, the UE may send the first SRS on the edge frequency band by using the antenna port used for transmitting the second SRS on the center frequency band. . For example, if the edge band sounding information only includes a transmission time indicating that the UE transmits the second SRS usage on the central frequency band, for example, TTI, the UE may simultaneously transmit the second SRS and the first on the central frequency band and the edge frequency band on the same TTI. SRS.

Optionally, the reuse of the configuration parameters for transmitting the second SRS on the edge frequency band may be pre-agreed by the network side device and the UE.

Optionally, the reuse of the configuration parameter for transmitting the second SRS on the edge frequency band may be: the network side device notifies the UE by signaling before receiving the UE sending the first SRS on the edge frequency band at the first frequency granularity. of.

In this embodiment, the UE reuses the configuration parameters used for transmitting the second SRS on the central frequency band, and does not need the network side device to introduce more signaling specifically for the first SRS transmitted on the edge frequency band for transmitting the edge band configuration. Information, which helps to reduce signaling overhead.

Optionally, before receiving the edge band detection information, the UE may include: receiving, by the UE, edge band information sent by the network side device, and determining an edge band from the system bandwidth according to the edge band information.

Optionally, the edge frequency band is a bandwidth of the system bandwidth except the UE transmitting the full bandwidth corresponding to the second SRS in the central frequency band.

For the implementation manner, refer to the description in the method for the network side device to receive the first SRS.

Optionally, before the sending, by the UE, the first SRS in the first frequency granularity on the edge frequency band, the UE includes: receiving, by the UE, first start edge indication information sent by the network side device. Correspondingly, another embodiment of the UE transmitting the first SRS at the first frequency granularity on the edge frequency band includes:

The UE determines, according to the first start edge indication information, an upper edge frequency band in the edge frequency band as a transmission start point, and then transmits the first SRS on the edge frequency band at a first frequency granularity.

In this implementation manner, after receiving the first start edge indication information sent by the network side device, the UE sends the first SRS on the upper edge frequency band and the lower edge frequency band in turn. For example, after receiving the first start edge indication information sent by the network side device, the UE may send the first SRS on the upper edge frequency band (for example, the PRB numbered 49) on the TTI numbered 0, and the number is On the TTI of 5, the first SRS is transmitted on the lower edge band (for example, the PRB numbered 0); on the TTI numbered 10, the first SRS is transmitted on the upper edge band (for example, the PRB numbered 49), ... and so on, the above edge band is the transmission starting point, and the first SRS is transmitted in the upper edge band and the lower edge band in turn.

Optionally, before the sending, by the UE, the first SRS in the first frequency granularity on the edge frequency band, the UE includes: receiving, by the UE, second start edge indication information sent by the network side device.

Correspondingly, another embodiment of the UE transmitting the first SRS in the first frequency granularity on the edge frequency band includes: determining, by the UE, the lower edge frequency band in the edge frequency band as the transmission starting point according to the second starting edge indication information, and then in the edge frequency band The first SRS is transmitted at the first frequency granularity.

In this embodiment, after receiving the second start edge indication information sent by the network side device, the UE sends the first SRS on the lower edge frequency band and the upper edge frequency band in turn. For example, after receiving the second start edge indication information sent by the network side device, the UE may send the first SRS on the lower edge frequency band (for example, the PRB numbered 0) on the TTI numbered 0, and the number is On the top of 5, the first SRS is transmitted on the upper edge band (for example, the PRB numbered 49); on the frame numbered 10, the first SRS is transmitted on the lower edge band (for example, the PRB numbered 0), ... and so on, the following edge band is the transmission starting point, and the first SRS is transmitted in the lower edge band and the upper edge band in turn.

Optionally, before the sending, by the UE, the first SRS in the first frequency granularity on the edge frequency band, the UE includes: Receiving upper and lower edge indication information sent by the network side device.

Correspondingly, another embodiment of the UE transmitting the first SRS on the edge frequency band at the first frequency granularity includes: the UE according to the upper and lower edge indication information, and simultaneously adopting the first frequency on the upper edge frequency band and the lower edge frequency band in the edge frequency band The granularity sends the first SRS.

In this embodiment, after receiving the upper and lower edge indication information sent by the network side device, the UE sends the first SRS on the upper edge frequency band and the lower edge frequency band, which facilitates the network side device to quickly acquire the two edge frequency bands. Uplink CSI, especially for UEs that are less affected by PAPR, such as UEs in the cell center, and simultaneously transmit the first SRS on the upper and lower edge frequency bands, which is not affected by the PAPR high and is beneficial to the network side. The device acquires the uplink CSI of the two edge bands faster.

The process of the UE transmitting the first SRS on the edge frequency band is compatible with the process of the network side device receiving the first SRS on the edge frequency band, and the cooperation between the network side device and the UE solves the problem that the UE cannot use the prior art. The method of transmitting the second SRS on the central frequency band transmits the first SRS on the edge frequency band, so that the UE successfully transmits the first SRS on the edge frequency band, and then learns the uplink frequency on the edge frequency band according to the first SRS sent by the UE on the edge frequency band. CSI, for the UE to accurately transmit data signals on the edge frequency band, improves the transmission efficiency on the edge frequency band. The above embodiments are applicable to various application scenarios in which CSI needs to be detected on an edge band.

FIG. 4 is a schematic structural diagram of a network side device according to an embodiment of the present invention. As shown in FIG. 4, the network side device of this embodiment includes: a first transmitter 41 and a first receiver 42.

The first transmitter 41 is configured to send edge band detection information to the UE, so that the UE sends the first SRS at the first frequency granularity on the edge frequency band of the system bandwidth. The first frequency granularity is different from the frequency granularity used by the UE to send the second SRS on the central frequency band of the system bandwidth.

The first receiver 42 is configured to receive, after the first transmitter 41 sends the edge band detection information to the UE, the first SRS that is sent by the UE at the first frequency granularity on the edge frequency band. Optional, first receiving The device 42 is connected to the first transmitter 41.

The function modules of the network side device in this embodiment can be used to perform the process of the SRS receiving method shown in FIG. 2, and the specific working principle is not described here. For details, refer to the description of the method embodiment.

The network side device in this embodiment may be a BS, an AP, an RRE, a remote radio port (RRH, an RRU, a relay node, etc.), but is not limited thereto.

The network side device in this embodiment sends the edge SPON configuration information to the UE, so that the UE sends the first SRS on the edge frequency band by using a frequency granularity different from that of sending the second SRS on the center frequency, which solves the problem that the UE cannot use the existing technology. The method of transmitting the second SRS on the central frequency band transmits the first SRS on the edge frequency band, so that the UE sends the first SRS on the edge frequency band, and the network side device can send the first SRS according to the UE on the edge frequency band. The CSI on the edge frequency band is obtained, and then the CSI on the obtained edge frequency band is used to accurately schedule the data transmitted by the UE on the edge frequency band, thereby improving the transmission efficiency on the edge frequency band.

Optionally, the first transmitter 41 is specifically configured to send the edge band detection information to the UE in a dynamic signaling manner on the transmission time interval of the number n, so that the UE is at least one after the TTI numbered n. The first SRS is transmitted on the edge band.

Optionally, the first transmitter 41 is specifically configured to send the edge band detection information to the UE in a semi-static manner, so that the UE periodically sends the first SRS on the edge frequency band. The edge band detection information includes period information indicating that the UE sends the first SRS on the edge frequency band.

Further, the edge band detection information sent by the first transmitter 41 may further include: time offset information, configured to indicate that the UE periodically sends the first SRS on the edge band starting from the TTI after the offset according to the time offset information.

Optionally, the edge band detection information of this embodiment may include some or all configuration parameters used by the UE to send the second SRS on the central frequency band. Based on this, the first receiver 42 is specifically configured to receive, by the UE, part or all of the configuration parameters used by the UE to transmit the second SRS on the central frequency band, and send the first SRS in the first frequency granularity on the edge frequency band.

Further, the first transmitter 41 of this embodiment may be further configured to send the edge band information to the UE before the edge band detection information is sent to the UE, so that the UE determines the edge band from the system bandwidth.

The edge band information includes but is not limited to: the number of PRBs included in the edge band, the number of PRBs included in the upper edge band in the edge band, the number of PRBs included in the lower edge band in the edge band, or the configuration number of the edge band. Optionally, the edge band in this embodiment is a bandwidth in the system bandwidth except that the UE sends the full bandwidth corresponding to the second SRS in the center band.

Further, the first transmitter 41 is further configured to: before the first receiver 42 receives the first SRS, send, to the UE, first start edge indication information, to indicate that the UE uses the upper edge frequency band in the edge frequency band as a transmission starting point, in the edge frequency band. The first SRS is sent on. Or

The first transmitter 41 is further configured to: before the first receiver 42 receives the first SRS, send second start edge indication information to the UE, to indicate that the UE uses the lower edge frequency band in the edge frequency band as a transmission starting point, on the edge frequency band. Send the first SRS. Or

The first transmitter 41 is further configured to send upper and lower edge indication information to the UE before the first receiver 42 receives the first SRS, to indicate that the UE simultaneously transmits the first SRS on the upper edge band and the lower edge band in the edge band.

Preferably, the first frequency granularity is 1 PRB.

Preferably, the first frequency granularity is smaller than a frequency granularity used by the UE to transmit the second SRS on the central frequency band.

The first transmitter 41 and the first receiver 42 in this embodiment may be used to perform the corresponding processes in the foregoing SRS receiving method embodiment, and details are not described herein again. For details, refer to the description of the method embodiments.

FIG. 5 is a schematic structural diagram of a UE according to an embodiment of the present invention. As shown in FIG. 5, the UE in this embodiment includes: a second receiver 51 and a second transmitter 52.

The second receiver 51 is configured to receive the edge band detection information, where the edge band detection information is sent by the network side device, and is used to indicate that the UE sends the first SRS at the first frequency granularity on the edge frequency band of the system bandwidth. The frequency granularity is different from the frequency granularity used by the UE to transmit the second SRS on the central frequency band of the system bandwidth.

a second transmitter 52, configured to detect edge band detection information according to the second receiver 51, The first SRS is transmitted at the first frequency granularity on the edge frequency band. Optionally, the second transmitter 52 is connected to the second receiver 51.

The function modules of the UE provided in this embodiment can be used to perform the process of the SRS sending method shown in FIG. 3, and the specific working principle is not described here. For details, refer to the description of the method embodiment.

The UE in this embodiment cooperates with the network side device provided by the foregoing embodiment of the present invention to receive the edge band detection information sent by the network side device, and then uses the edge band according to the indication of the edge band detection information. The frequency of the second SRS is sent on the central frequency band to send the first SRS, which solves the problem that the UE cannot send the first SRS on the edge frequency band by using the method of sending the second SRS on the central frequency band in the prior art, so that the network side device can The uplink CSI on the edge frequency band is learned according to the first SRS sent by the UE on the edge frequency band, and thus the data signal transmitted by the UE on the edge frequency band can be accurately scheduled, which is advantageous for providing transmission efficiency on the edge frequency band.

FIG. 6 is a schematic structural diagram of a UE according to another embodiment of the present invention. This embodiment is implemented based on the embodiment shown in FIG. As shown in Fig. 6, the UE of this embodiment also includes: a second receiver 51 and a second transmitter 52, and the second receiver 51 and the second transmitter 52 also have the operations in the embodiment shown in Fig. 5.

Further, the UE in this embodiment further includes: a first generation module 53.

The first generating module 53 is configured to generate the first SRS by using a base sequence used to generate the DM RS or using a base sequence used to generate the second SRS before the second transmitter 52 sends the first SRS. Optionally, the first generating module 53 is connected to the second transmitter 52, and configured to provide the first SRS to the second transmitter 52.

Further, the first generating module 53 is specifically configured to cyclically shift a base sequence in a base sequence group used to generate the DM RS or used to generate the second SRS, and then generate a first SRS by using the cyclically shifted base sequence. .

Further, the UE in this embodiment further includes: a second generation module 54.

a second generating module 54, configured to send, according to the orthogonal code resource and/or comb information used by the UE to send the second SRS on the central frequency band, before the second transmitter 52 sends the first SRS, to generate the UE to send on the edge frequency band. The orthogonal code resource used by the first SRS. The second generation module 54 is coupled to the second transmitter 52 for providing the second transmitter 52 with orthogonal code resources for transmitting the first SRS.

Based on the above, the second transmitter 52 is specifically configured to send the first SRS on the edge frequency band at the first frequency granularity by using the orthogonal code resource generated by the second generation module 54. Further, the second generation module 54 is specifically configured to generate, according to the formula (1), the formula (2) or the formula (3), an orthogonal code resource used by the UE to send the first SRS on the edge frequency band. For a description of the formula (1), the formula (2) or the formula (3), refer to the description in the above method embodiment.

Optionally, the second transmitter 52 is specifically configured to send the first SRS at a first frequency granularity on all subcarriers in the edge frequency band.

Optionally, the second receiver 51 is specifically configured to receive the edge band detection information that is sent by the network side device in the dynamic signaling manner on the transmission time interval of the number n.

Correspondingly, the second transmitter 52 is specifically operable to transmit the first SRS on the edge band in at least one TTI after the number n.

Optionally, the second receiver 51 is specifically configured to receive edge band detection information that is sent by the network side device in a semi-static manner, and the edge band detection information includes period information that indicates that the UE sends the first SRS on the edge frequency band.

Correspondingly, the second transmitter 52 is specifically configured to periodically transmit the first SRS on the edge band according to the period information.

Further, the edge band detection information received by the second receiver 51 may further include: time offset information. The second transmitter 52 is more specifically operable to periodically transmit the first SRS on the edge band according to the period information, starting from the TTI offset according to the time offset information.

Further, the edge band sounding information of this embodiment may include some or all configuration parameters used by the UE to transmit the second SRS on the center frequency band. The second transmitter 52 is specifically configured to send, by using the UE, part or all of the configuration parameters used by the second SRS on the central frequency band, and send the first SRS on the edge frequency band at the first frequency granularity.

Further, the second receiver 51 of the embodiment may be further configured to: receive the edge band information sent by the network side device before receiving the edge band detection information, and determine the edge band from the system bandwidth according to the edge band information.

Further, the second receiver 51 of the embodiment may be further configured to receive the first start edge indication information sent by the network side device before the second sender 52 sends the first SRS.

Correspondingly, the second transmitter 52 is specifically configured to determine an edge according to the first start edge indication information. The upper edge band in the band is the transmission start point, and then the first SRS is transmitted at the first frequency granularity on the edge band. or

The second receiver 52 is further configured to receive the second start edge indication information sent by the network side device before the second sender 52 sends the first SRS.

Correspondingly, the second transmitter 52 has a body for determining that the lower edge band in the edge band is the transmission starting point according to the second starting edge indication information, and then transmitting the first SRS at the first frequency granularity on the edge band. Or

The second receiver 51 is further configured to receive upper and lower edge indication information sent by the network side device before the second transmitter 52 sends the first SRS.

Correspondingly, the second transmitter 52 is specifically operable to transmit the first SRS at the first frequency granularity on the upper edge band and the lower edge band in the edge band according to the upper and lower edge indication information.

The edge band of this embodiment is the bandwidth of the system bandwidth except the UE transmitting the full bandwidth corresponding to the second SRS in the center band.

Preferably, the first frequency granularity of this embodiment is 1 PRB.

Preferably, the first frequency granularity of the embodiment is smaller than the frequency granularity used by the UE to transmit the second SRS on the central frequency band.

The function modules of the UE provided in this embodiment may be used to perform the corresponding processes in the foregoing SRS sending method embodiment, and the specific working principles are not described herein. For details, refer to the description of the method embodiments.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Claim

A method for receiving a sounding reference signal, comprising:

The method for receiving sounding reference signals according to claim 1, wherein the network side device sends edge band sounding information to the user equipment UE, so that the UE uses the first frequency in the edge frequency band of the system bandwidth. The granularity of transmitting the first sounding reference signal includes:

Sending, by the network side device, the edge band detection information to the UE in a dynamic signaling manner on a transmission time interval TTI numbered n, so that the UE is in at least one after the TTI numbered n Transmitting the first sounding reference signal on the edge frequency band.

The network side device sends the edge frequency band detection information to the UE in a semi-static manner, so that the UE periodically sends the first sounding reference signal on the edge frequency band; the edge frequency band detection information And including period information indicating that the UE sends the first sounding reference signal on the edge frequency band.

The detection reference signal receiving method according to claim 3, wherein the edge band detection information further includes: time offset information, configured to indicate that the UE is offset from the time offset information The transmission time interval ΤΉ begins to periodically transmit the first sounding reference signal on the edge frequency band.

The method for receiving a sounding reference signal according to claim 1, wherein the edge band sounding information includes part or all of configuration parameters used by the UE to transmit the second sounding reference signal on the center frequency band. ;

The receiving, by the network side device, the first sounding reference signal that is sent by the UE on the edge frequency band at the first frequency granularity includes: Receiving, by the network side device, part or all configuration parameters used by the UE to send the second sounding reference signal on the central frequency band by using the UE, and sending the first frequency granularity on the edge frequency band. The first sounding reference signal.

The method for receiving sounding reference signals according to any one of claims 1 to 5, wherein the network side device sends edge band sounding information to the user equipment UE, so that the UE is in an edge band of the system bandwidth. Before transmitting the first sounding reference signal at the first frequency granularity, the method includes:

The network side device sends edge band information to the UE, so that the UE determines the edge band from the system bandwidth.

The sounding reference signal receiving method according to claim 6, wherein the edge frequency band information comprises: a number of PRBs included in the edge frequency band, a number of PRBs included in an upper edge frequency band in the edge frequency band, The number of PRBs included in the lower edge band in the edge band or the configuration number of the edge band.

The sounding reference signal receiving method according to any one of claims 1 to 5, wherein the edge frequency band is the system bandwidth, and the second sounding reference is sent by the UE in the center frequency band. The bandwidth outside the full bandwidth corresponding to the signal.

The method for receiving a sounding reference signal according to any one of claims 1 to 8, wherein the network side device receives the said UE transmits the first frequency granularity on the edge frequency band. Before the first sounding reference signal includes:

The network side device sends the first start edge indication information to the UE, to indicate that the UE uses the upper edge frequency band in the edge frequency band as a transmission starting point, and sends the first sounding reference signal on the edge frequency band. ; or

The network side device sends the second start edge indication information to the UE, to indicate that the UE uses the lower edge frequency band in the edge frequency band as a transmission starting point, and sends the first sounding reference on the edge frequency band. Signal; or

And the network side device sends upper and lower edge indication information to the UE, to instruct the UE to simultaneously send the first sounding reference signal on an upper edge frequency band and a lower edge frequency band in the edge frequency band.

The sounding reference signal receiving method according to any one of claims 1 to 9, wherein the first frequency granularity is 1 PRB.

The sounding reference signal receiving method according to any one of claims 1 to 9, characterized in that The first frequency granularity is smaller than a frequency granularity used by the UE to send the second sounding reference signal on the central frequency band.

12. A method for transmitting a sounding reference signal, comprising:

13. The sounding reference signal transmitting method according to claim 12, wherein:

Before the UE sends the first sounding reference signal at the first frequency granularity on the edge frequency band, the method includes:

The UE generates the first sounding reference signal using a base sequence for generating a DM RS or using a base sequence set for generating the second sounding reference signal.

The method for transmitting a sounding reference signal according to claim 13, wherein the generating the first sounding reference signal by the base sequence in the column group comprises:

Performing, by the UE, a base sequence in the base sequence group used to generate the DM RS or used to generate the second sounding reference signal, and then generating the first sequence by using the cyclically shifted base sequence Probe reference signal.

The method for transmitting a sounding reference signal according to claim 12, 13 or 14, wherein the transmitting, by the UE, the first sounding reference signal at the first frequency granularity on the edge frequency band comprises:

Generating, by the UE, the orthogonal code resource and/or comb information used by the second sounding reference signal on the central frequency band, and generating, by the UE, the first probe on the edge frequency band. The orthogonal code resource used by the reference signal;

The transmitting, by the UE, the first sounding reference signal at the first frequency granularity on the edge frequency band includes:

The UE transmits the first sounding reference signal at the first frequency granularity on the edge frequency band by using the orthogonal code resource.

The sounding reference signal transmitting method according to claim 15, wherein the UE transmits orthogonal code resources and/or combs used by the second sounding reference signal on the central frequency band by the UE. The orthogonal information resource used by the UE to send the first sounding reference signal on the edge frequency band is:

The UE generates the according to the formula CS_edge= ( CS− center + combx8 ) mod 12

Transmitting, by the UE, the orthogonal code resource used by the first sounding reference signal on the edge frequency band; or the UE generating, according to the formula CS_edge=CS_center mod 12, the sending of the UE on the edge frequency band An orthogonal code resource used by the first sounding reference signal; or

The UE generates an orthogonal code resource used by the UE to send the first sounding reference signal on the edge frequency band according to a formula CS_edge=( combx6) mod 12;

The CS_edge is an orthogonal code resource used by the UE to send the first sounding reference signal on the edge frequency band;

The CS-center is an orthogonal code resource used by the UE to send the second sounding reference signal on the central frequency band;

Comb is the comb information used by the UE to send the second sounding reference signal on the center frequency band;

Mod represents the modulo operation.

The method for transmitting a sounding reference signal according to any one of claims 12 to 16, wherein the transmitting, by the UE, the first sounding reference signal at the first frequency granularity on the edge frequency band comprises:

The UE transmits the first sounding reference signal at the first frequency granularity on all subcarriers in the edge frequency band.

The method for transmitting sounding reference signals according to any one of claims 12-17, wherein the receiving, by the user equipment UE, the edge band detection information comprises:

Receiving, by the UE, the edge band detection information that is sent by the network side device in a dynamic signaling manner on a transmission time interval TTI of number n;

The UE transmits the first sounding reference signal on the edge frequency band in at least one TTI after the TTI numbered n.

The UE receives the edge band detection information that is sent by the network side device in a semi-static manner, and the edge band detection information includes period information indicating that the UE sends the first sounding reference signal on the edge frequency band. ;

The UE periodically transmits the first probe reference signal on the edge frequency band according to the period information.

The sounding reference signal transmitting method according to claim 19, wherein the edge frequency band detecting information further comprises: time offset information;

The periodically transmitting, by the UE, the first detection reference signal on the edge frequency band according to the period information includes:

The UE periodically transmits the first sounding reference signal on the edge frequency band according to the period information, starting from a transmission time interval 偏移 according to the time offset information offset.

The method for transmitting a sounding reference signal according to any one of claims 12 to 16, wherein the edge band sounding information includes that the UE transmits the second sounding reference signal on the center frequency band. Some or all of the configuration parameters;

And transmitting, by the UE, part or all configuration parameters used by the second sounding reference signal on the central frequency band, and transmitting, by using the first frequency granularity, the first sounding reference signal on the edge frequency band .

The method for transmitting a sounding reference signal according to any one of claims 12 to 21, wherein before the user equipment UE receives the edge frequency band detection information, the method includes:

The UE receives the edge band information sent by the network side device, and determines the edge band from the system bandwidth according to the edge band information.

The sounding reference signal transmitting method according to claim 22, wherein the edge frequency band information comprises: a number of PRBs included in the edge frequency band, a number of PRBs included in an upper edge frequency band in the edge frequency band, The number of PRBs included in the lower edge band in the edge band Or the configuration number of the edge band.

The sounding reference signal transmitting method according to any one of claims 12 to 21, wherein the edge frequency band is the system bandwidth, and the second sounding reference is sent by the UE in the central frequency band. The bandwidth outside the full bandwidth corresponding to the signal.

The method for transmitting a sounding reference signal according to any one of claims 12 to 24, wherein the UE includes the first sounding reference signal before transmitting the first sounding reference signal on the edge frequency band. :

Receiving, by the UE, first start edge indication information sent by the network side device;

Determining, by the UE, the upper edge frequency band in the edge frequency band as a transmission starting point according to the first starting edge indication information, and then transmitting the first sounding reference signal on the edge frequency band at the first frequency granularity; or

Receiving, by the UE, second start edge indication information sent by the network side device;

Determining, by the UE according to the second start edge indication information, a lower edge frequency band in the edge frequency band as a transmission starting point, and then transmitting the first sounding reference signal on the edge frequency band at the first frequency granularity; Or

Receiving, by the UE, upper and lower edge indication information sent by the network side device;

And transmitting, by the UE, the first sounding reference signal at the first frequency granularity on an upper edge frequency band and a lower edge frequency band in the edge frequency band according to the upper and lower edge indication information.

The method for transmitting a sounding reference signal according to any one of claims 12 to 25, wherein the first frequency granularity is 1 PRB.

The method for transmitting a sounding reference signal according to any one of claims 12 to 25, wherein the first frequency granularity is smaller than that used by the UE to transmit the second sounding reference signal on the central frequency band. Frequency granularity.

28. A network side device, comprising:

The network side device according to claim 28, wherein the first transmitter is specifically configured to send the edge to the UE in a dynamic signaling manner on a transmission time interval TTI numbered n Band detection information, such that the UE transmits the first sounding reference signal on the edge frequency band in at least one TTI after a TTI numbered n.

The network side device according to claim 28, wherein the first transmitter is specifically configured to send the edge band detection information to the UE in a semi-static manner, so that the UE is in the The first sounding reference signal is periodically transmitted on the edge frequency band; the edge frequency band sounding information includes period information indicating that the UE transmits the first sounding reference signal on the edge frequency band.

The network side device according to claim 28, wherein the edge band detection information comprises a part or all configuration parameters used by the UE to send the second sounding reference signal on the center frequency band;

The first receiver is specifically configured to receive part or all of configuration parameters used by the UE to send the second sounding reference signal on the central frequency band by using the UE, where the first frequency band is The first sounding reference signal transmitted at a frequency granularity.

The network side device according to any one of claims 28 to 31, wherein the first transmitter is further configured to send to the UE before sending the edge band detection information to the UE. Edge band information to cause the UE to determine the edge band from the system bandwidth.

The network side device according to any one of claims 28 to 32, wherein the first transmitter is further configured to: before the first receiver receives the first sounding reference signal, Transmitting, by the UE, first start edge indication information, to indicate that the UE sends the first sounding reference signal on the edge frequency band by using an upper edge frequency band in the edge frequency band as a transmission starting point; or the first sending The device is further configured to: before the first receiver receives the first sounding reference signal, send second start edge indication information to the UE, to indicate that the UE uses a lower edge frequency band in the edge frequency band as Sending a starting point, transmitting the first sounding reference signal on the edge frequency band; or

The first transmitter is further configured to send upper and lower edge indication information to the UE before the first receiver receives the first sounding reference signal, to indicate that the UE is in an upper edge of the edge frequency band. The first sounding reference signal is simultaneously transmitted on the frequency band and the lower edge frequency band.

34. A user equipment UE, which is characterized by comprising:

a second receiver, configured to receive the edge frequency band detection information, where the edge frequency band detection information is sent by the network side device, and is used to indicate that the UE sends the first sounding reference signal at a first frequency granularity on an edge frequency band of the system bandwidth. The first frequency granularity is different from a frequency granularity used by the UE to transmit a second sounding reference signal on a center frequency band of the system bandwidth;

And a second transmitter, configured to send the first sounding reference signal at the first frequency granularity on the edge frequency band.

The UE according to claim 34, further comprising:

a first generating module, configured to use, before the second transmitter sends the first sounding reference signal, a base used in generating a DM RS or using a base sequence group used to generate the second sounding reference signal The sequence generates the first sounding reference signal.

The UE according to claim 35, wherein the first generating module is specifically configured to be used in the base sequence group for generating the DM RS or for generating the second sounding reference signal. The base sequence is cyclically shifted, and then the first sounding reference signal is generated using the cyclically shifted base sequence.

The UE according to claim 34, 35 or 36, further comprising: a second generating module, configured to: according to the UE, before the second transmitter sends the first sounding reference signal Transmitting an orthogonal code resource and/or comb information used by the second sounding reference signal on the central frequency band to generate an orthogonal code used by the UE to send the first sounding reference signal on the edge frequency band Resource

The second transmitter is specifically configured to use the orthogonal code resource on the edge band to The first frequency reference granularity transmits the first sounding reference signal.

The UE according to claim 37, wherein the second generating module is specifically configured to generate, according to a formula CS_edge=( CS− center + combx8 ) mod 12, the UE to send on the edge frequency band. An orthogonal code resource used by the first sounding reference signal; or

The second generating module is specifically configured to generate, according to the formula CS_edge=CS_center mod 12, an orthogonal code resource used by the UE to send the first sounding reference signal on the edge frequency band; or

The second generation module is specifically configured to generate, according to the formula CS_edge=( combx6) mod 12, an orthogonal code resource used by the UE to send the first sounding reference signal on the edge frequency band; wherein, CS— An edge is an orthogonal code resource used by the UE to send the first sounding reference signal on the edge frequency band;

Mod represents the modulo operation.

The UE according to any one of claims 34 to 38, wherein the second transmitter is specifically configured to send the first frequency granularity on all subcarriers in the edge frequency band. The first sounding reference signal.

The UE according to any one of claims 34 to 39, wherein the second receiver is specifically configured to receive the network side device to dynamically signal on a transmission time interval TTI numbered n. The edge band detection information sent by the method;

The second transmitter is specifically configured to send the first sounding reference signal on the edge frequency band in at least one of the numbers after the number n.

The UE according to any one of claims 34 to 39, wherein the second receiver is specifically configured to receive the edge band detection information that is sent by the network side device in a semi-static manner, The edge band sounding information includes period information indicating that the UE transmits the first sounding reference signal on the edge frequency band;

The second transmitter is specifically configured to periodically send the first sounding reference signal on the edge frequency band according to the period information.

The UE according to claim 41, wherein the edge band detection information further includes: time offset information;

The second transmitter is further configured to periodically send the first probe on the edge frequency band according to the period information, starting from a transmission time interval 偏移 according to the time offset information offset. Reference signal.

The UE according to any one of claims 34 to 38, wherein the edge band sounding information includes part or all of a configuration in which the UE transmits the second sounding reference signal on the center frequency band. Parameter

The second transmitter is specifically configured to use the UE to send some or all configuration parameters used by the second sounding reference signal on the center frequency band, and send the first frequency granularity on the edge frequency band. The first sounding reference signal is described.

The UE according to any one of claims 34-43, wherein the second receiver is further configured to receive the edge band information sent by the network side device before receiving the edge band detection information. And determining the edge band from the system bandwidth according to the edge band information.

The UE according to any one of claims 34 to 44, wherein the second receiver is further configured to receive the network before the second transmitter sends the first sounding reference signal The first start edge indication information sent by the side device;

The second transmitter is configured to determine, according to the first start edge indication information, an upper edge frequency band in the edge frequency band as a transmission start point, and then send the first frequency granularity on the edge frequency band. a sounding reference signal; or

The second receiver is further configured to receive second start edge indication information sent by the network side device, before the second transmitter sends the first sounding reference signal;

The second transmitter is specifically configured to determine, according to the second start edge indication information, a lower edge frequency band in the edge frequency band as a transmission start point, and then send the first frequency granularity on the edge frequency band. First sounding reference signal; or

The second receiver is further configured to receive upper and lower edge indication information sent by the network side device, before the second transmitter sends the first sounding reference signal;

The second transmitter is specifically configured to send the first sounding reference signal at the first frequency granularity on the upper edge frequency band and the lower edge frequency band in the edge frequency band according to the upper and lower edge indication information.