CN106411375B - SRS indication sending method, SRS sending method and device - Google Patents

SRS indication sending method, SRS sending method and device Download PDF

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CN106411375B
CN106411375B CN201510466487.7A CN201510466487A CN106411375B CN 106411375 B CN106411375 B CN 106411375B CN 201510466487 A CN201510466487 A CN 201510466487A CN 106411375 B CN106411375 B CN 106411375B
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srs
frequency band
downlink
subframe
configuration information
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CN106411375A (en
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王瑜新
鲁照华
陈艺戬
李儒岳
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

The invention provides an SRS indication sending method, an SRS sending method and a device. The SRS indication sending method comprises the following steps: generating configuration information for instructing a terminal device to transmit an SRS in a downlink frequency band or a preset frequency band, wherein the preset frequency band comprises: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; and sending the configuration information to the terminal equipment. The invention solves the problems of downlink pilot frequency resource overhead and terminal feedback overhead waste in a Massive MIMO FDD system, and reduces the downlink pilot frequency resource overhead and the feedback quantity of the terminal.

Description

SRS indication sending method, SRS sending method and device
Technical Field
The present invention relates to the field of communications, and in particular, to an SRS indication transmitting method, an SRS transmitting method, and an apparatus thereof.
Background
A radio frame (radio frame) in a Long Term Evolution (LTE) system includes frame structures of a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode. Fig. 1 is a diagram illustrating a frame structure of an FDD mode according to the related art, and as shown in fig. 1, a 10 millisecond (ms) radio frame is composed of twenty slots (slots) with a length of 0.5ms and numbers of 0 to 19, and slots 2i and 2i +1 constitute a subframe (subframe) i with a length of 1 ms. Fig. 2 is a diagram illustrating a frame structure of a TDD mode according to the related art, and as shown in fig. 2, a 10ms radio frame is composed of two half-frames (half frames) with a length of 5ms, one half-frame includes 5 subframes with a length of 1ms, and a subframe i is defined as 2 slots 2i and 2i +1 with a length of 0.5 ms.
In the above two frame structures, for a Normal Cyclic Prefix (Normal CP), a slot contains 7 symbols with a length of 66.7 microseconds (us), wherein the CP length of the first symbol is 5.21us, and the CP length of the remaining 6 symbols is 4.69 us; for an Extended Cyclic Prefix (Extended CP), a slot contains 6 symbols, and the CP length of all symbols is 16.67 us. Time unit TsDefinition ofIs TsThe supported uplink and downlink configurations are shown in table 1, assuming 1/(15000 × 2048) seconds.
Table 1 uplink (Up Link, UL)/downlink (Down Link, DL) configuration
Figure BDA0000772785980000011
As shown in table 1, for each subframe in one radio frame, "D" denotes a subframe dedicated to downlink transmission, "U" denotes a subframe dedicated to uplink transmission, "S" denotes a special subframe, including: the method is used for three fields of a Downlink Pilot Time Slot (DwPTS for short), a Guard Period (GP for short) and an Uplink Pilot Time Slot (UpPTS for short). The length of DwPTS and UpPTS are shown in Table 2, wherein the total length of DwPTS, GP and UpPTS is 30720. T s1 ms. Each subframe i is represented by 2 slots 2i and 2i +1, each slot being of length Tslot＝15360·Ts＝0.5ms。
TABLE 2 Special subframe configuration (DwPTS/GP/UpPTS length)
Figure BDA0000772785980000021
LTE TDD supports uplink and downlink switching periods of 5ms and 10 ms. If the period of the downlink-to-uplink switching point is 5ms, the special subframe exists in two half frames; if the downlink-to-uplink switching point period is 10ms, the special subframe only exists in the first half frame. Subframe 0 and subframe 5 and DwPTS are always used for downlink transmission. The UpPTS and the subframe immediately following the special subframe are dedicated for uplink transmission.
In LTE, a Physical Downlink Control Channel (PDCCH) is used to carry uplink and downlink scheduling information, as well as uplink power control information. Downlink Control Information (DCI) format (format) is divided into DCI formats 0, 1A, 1B, 1C, 1D, 2A, 3A, etc., and then, DCI formats 2B, 2C, 2D are added to LTE-a Release 12(LTE-a Release 12) to support various applications and transmission modes. A base station (e-Node-B, abbreviated as eNB) may configure a terminal device (User Equipment, abbreviated as UE) through downlink control information, or the terminal device receives configuration of a higher layer (highers), which is also called to configure the UE through a higher layer signaling.
A Sounding Reference Signal (SRS) is a Signal between a terminal device and a base station for measuring Channel State Information (CSI). In a long term evolution system, a UE (user equipment) transmits an uplink SRS (sounding reference signal) on the last data symbol of a transmission subframe at fixed time according to parameters such as a frequency band, a frequency domain position, a sequence cyclic shift, a period and subframe offset indicated by an eNB (evolved node B). And the eNB judges the uplink CSI of the UE according to the received SRS, and performs operations such as frequency domain selection scheduling, closed-loop power control and the like according to the obtained CSI.
In a study of the existing LTE-a Release 10(LTE-a Release 10) it was proposed: in uplink communication, non-precoded SRS should be used, namely: the SRS is specific to an antenna, and a Reference Signal (De Modulation Reference Signal, abbreviated as DMRS) for demodulation of the PUSCH is precoded. The base station can estimate the original CSI of the uplink by receiving the non-precoded SRS, and the precoded DMRS can not enable the base station to estimate the original CSI of the uplink. At this time, when the UE transmits the non-precoded SRS using multiple antennas, SRS resources required by each UE are increased, which results in a decrease in the number of UEs that can be simultaneously multiplexed in the system. The UE may send the SRS through two triggering modes, namely, a higher layer signaling (also referred to as being triggered by trigger type 0) or downlink control information (also referred to as being triggered by trigger type 1), where the triggering mode is a periodic SRS based on the higher layer signaling, and the triggering mode is an aperiodic SRS based on the downlink control information. The LTE-A Release 10 is added with a mode of non-periodically sending the SRS, thereby improving the utilization rate of the SRS resource to a certain extent and improving the flexibility of resource scheduling.
The inventor of the present invention finds in the research process that, in the LTE-a Release 13(LTE-a Release 13), in order to reduce the resource overhead of downlink pilot and reduce the feedback amount of UE in a Full-Dimension MIMO (Full Dimension-MIMO) or MIMO (Massive-MIMO) system with a large number of antennas, a TDD system base station often obtains downlink CSI by measuring SRS and utilizing Channel reciprocity, but for an FDD system, due to the frequency band difference between an uplink and a downlink, the method of obtaining downlink CSI by measuring SRS and utilizing Channel reciprocity at a base station side becomes very unreliable, and in order to obtain downlink CSI at a base station side, a large number of downlink pilots are transmitted for a large number of antennas only by a conventional method, a downlink pilot is measured at a UE side, then Channel Quality Information (CQI, Channel Quality Information) and a matrix precoding index (PMI) are fed back to the base station, precoded Matrix Index), such conventional approach will inevitably waste a large amount of downlink pilot resource overhead and increase the feedback amount of the UE.
Aiming at the problem of waste of downlink pilot frequency resource overhead and terminal feedback overhead in an FDD system of Massive MIMO in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides an SRS indication sending method, an SRS sending method and a device, which are used for at least solving the problems of downlink pilot frequency resource overhead and terminal feedback overhead waste in a Massive MIMO FDD system.
According to another aspect of the present invention, there is also provided an SRS transmission method, including: generating configuration information for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; and sending the configuration information to the terminal equipment.
Preferably, before generating the configuration information, the method further comprises: and receiving capability information of the terminal equipment from an uplink frequency band, wherein the capability information is used for indicating whether the terminal equipment has the capability of transmitting the SRS on the downlink frequency band.
Preferably, the configuration information comprises at least one of: the configuration information of uplink and downlink, the configuration information of subframe group, and the sending parameters of SRS configured on the downlink frequency band or in the downlink control signaling.
Preferably, the transmission parameters of the SRS configured on the downlink frequency band include: configuring a transmission period of the SRS on the downlink frequency band; the sending parameters configured in the downlink control signaling include: configuring an SRS request field in the downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
Preferably, the transmission period of the SRS configured on the downlink frequency band is used to instruct the terminal device to transmit the SRS on a subframe in the transmission period.
Preferably, the transmission period includes one of: 2 milliseconds, 5 milliseconds, 10 milliseconds.
Preferably, when the transmission period is 2 milliseconds or 5 milliseconds, the transmission period is used to instruct the terminal device to transmit the SRS in an uplink pilot timeslot of a special subframe, where each radio frame on the downlink frequency band includes 2 special subframes; and/or under the condition that the transmission period is 10 milliseconds, the transmission period is used for instructing the terminal device to transmit the SRS in an uplink pilot timeslot of a special subframe, wherein each radio frame on the downlink frequency band includes 1 special subframe.
Preferably, the transmission parameter of the SRS configured on the downlink frequency band includes at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
Preferably, when a value of the request field of the SRS configured in the downlink control signaling is a preset value, the request field is configured to: indicating that the terminal device transmits the SRS on the downlink frequency band under the condition that a current communication system of the terminal device is a Frequency Division Duplex (FDD) system; and/or indicating that the terminal equipment sends the SRS in an uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system.
Preferably, the downlink control signaling includes one of: DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
Preferably, the radio frame structure indicated by the uplink and downlink configuration includes 1 or 2 special subframes, where a next subframe of the special subframes is a downlink subframe.
Preferably, the special subframe is located at one or two of the following subframe numbers: subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe number 9.
Preferably, the configuration information of the subframe group includes at least one of: indicating a first subframe group for transmitting the SRS in the downlink frequency band; indicating a second subframe group to transmit the SRS in an uplink frequency band.
Preferably, the first subframe group is used to indicate: when the subframe where the downlink control signaling for triggering SRS transmission is located is in the first subframe group, transmitting the SRS triggered by the downlink control signaling in the downlink frequency band; the second subframe group is used for indicating that: and when the subframe where the downlink control signaling for triggering SRS transmission is located is in the second subframe group, transmitting the SRS triggered by the downlink control signaling in the uplink frequency band.
According to another aspect of the present invention, there is also provided a SRS transmission method, including: the method comprises the steps that terminal equipment receives configuration information used for indicating the terminal equipment to send SRS on a downlink frequency band or a preset frequency band, wherein the preset frequency band comprises: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; and sending the SRS on the downlink frequency band or the preset frequency band according to the configuration information.
Preferably, before the terminal device receives the configuration information, the method further includes: and the terminal equipment sends capability information of the terminal equipment to a sender of the configuration information, wherein the capability information is used for indicating whether the terminal equipment has the capability of sending the SRS on the downlink frequency band.
Preferably, the configuration information comprises at least one of: the configuration information of uplink and downlink, the configuration information of subframe group, and the sending parameters of SRS configured on the downlink frequency band or in the downlink control signaling.
Preferably, the transmission parameters of the SRS configured on the downlink frequency band include: configuring a transmission period of the SRS on the downlink frequency band; the sending parameters configured in the downlink control signaling include: configuring an SRS request field in the downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
Preferably, when the configuration information includes a transmission period of an SRS configured in the downlink frequency band, transmitting the SRS in the downlink frequency band or the preset frequency band according to the configuration information includes: and the terminal equipment transmits the SRS on the subframe in the transmission period.
Preferably, the transmission period includes one of: 2 milliseconds, 5 milliseconds, 10 milliseconds.
Preferably, when the configuration information includes a transmission period of an SRS configured in the downlink frequency band, transmitting the SRS in the downlink frequency band or the preset frequency band according to the configuration information includes: under the condition that the sending period is 2 milliseconds or 5 milliseconds, the terminal equipment sends the SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on the downlink frequency band comprises 2 special subframes; and/or under the condition that the transmission period is 10 milliseconds, the terminal equipment transmits the SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on the downlink frequency band comprises 1 special subframe.
Preferably, the transmission parameter of the SRS configured on the downlink frequency band includes at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
Preferably, when the configuration information includes the request field of the SRS configured in the downlink control signaling, and a value of the request field is a preset value, sending the SRS on the downlink frequency band or the preset frequency band according to the configuration information includes: the terminal equipment transmits the SRS on the downlink frequency band under the condition that the current communication system of the terminal equipment is a Frequency Division Duplex (FDD) system; and/or the terminal equipment sends the SRS on an uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system.
Preferably, the downlink control signaling includes one of: DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
Preferably, the radio frame structure indicated by the uplink and downlink configuration includes 1 or 2 special subframes, where a next subframe of the special subframes is a downlink subframe.
Preferably, the special subframe is located at one or two of the following subframe numbers: subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe number 9.
Preferably, the configuration information of the subframe group includes at least one of: indicating a first subframe group for transmitting the SRS in the downlink frequency band; indicating a second subframe group to transmit the SRS in an uplink frequency band.
Preferably, when the configuration information includes configuration information of the subframe group, transmitting the SRS on the downlink frequency band or the preset frequency band according to the configuration information includes: when the subframe where the downlink control signaling for triggering SRS transmission is located is in the first subframe group, the terminal equipment transmits the SRS triggered by the downlink control signaling in the downlink frequency band; and when the subframe in which the downlink control signaling for triggering SRS transmission is located is in the second subframe group, the terminal equipment transmits the SRS triggered by the downlink control signaling in the uplink frequency band.
According to another aspect of the present invention, there is also provided an SRS indication transmitting apparatus, including: a generating module, configured to generate configuration information for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; and the sending module is used for sending the configuration information to the terminal equipment.
Preferably, the apparatus further comprises: a receiving module, configured to receive capability information of the terminal device from an uplink frequency band, where the capability information is used to indicate whether the terminal device has a capability of transmitting the SRS on the downlink frequency band.
According to another aspect of the present invention, there is also provided an SRS transmission apparatus, applied to a terminal device, including: a receiving module, configured to receive configuration information used for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; a first sending module, configured to send the SRS in the downlink frequency band or the preset frequency band according to the configuration information.
Preferably, the apparatus further comprises: a second sending module, configured to send capability information of the terminal device to a sender of the configuration information, where the capability information is used to indicate whether the terminal device has a capability of sending the SRS on the downlink frequency band.
According to another aspect of the present invention, there is also provided a base station, including: the above-described instruction transmitting apparatus for the sounding reference signal SRS.
According to another aspect of the present invention, there is also provided a terminal device, including: the above-described transmission apparatus for a sounding reference signal SRS.
According to the invention, the configuration information for indicating the terminal equipment to send the SRS on the downlink frequency band or the preset frequency band is generated, wherein the preset frequency band comprises: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; the method for sending the configuration information to the terminal equipment solves the problem of downlink pilot frequency resource overhead and terminal feedback overhead waste in an FDD system of Massive MIMO, and reduces the downlink pilot frequency resource overhead and the feedback quantity of the terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a diagram of a frame structure of an FDD mode according to the related art;
fig. 2 is a diagram of a frame structure of a TDD mode according to the related art;
fig. 3 is a flowchart of an indication transmitting method of an SRS according to an embodiment of the present invention;
fig. 4 is a flowchart of a method of transmitting an SRS according to an embodiment of the present invention;
fig. 5 is a block diagram of an instruction transmitting apparatus for SRS according to an embodiment of the present invention;
fig. 6 is a block diagram of a preferred structure of an indication transmitting apparatus for SRS according to an embodiment of the present invention;
fig. 7 is a block diagram of a structure of an SRS transmission apparatus according to an embodiment of the present invention;
fig. 8 is a block diagram of a preferred structure of an SRS transmission apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In this embodiment, an SRS indication transmitting method is provided, and fig. 3 is a flowchart of an SRS indication transmitting method according to an embodiment of the present invention, where as shown in fig. 3, the flowchart includes the following steps:
step S302, generating configuration information for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
and step S304, sending the configuration information to the terminal equipment.
Through the above steps, by sending configuration information to the terminal device, the terminal device is instructed to send the SRS on the downlink frequency band or the preset frequency band, so that the terminal device can send the SRS information on the downlink frequency band or the preset frequency band (for example, the uplink pilot time slot) according to the configuration information. The method solves the problem of waste of downlink pilot frequency resource overhead and terminal feedback overhead in an FDD system of Massive MIMO, and reduces the resource overhead of downlink pilot frequency and the feedback quantity of the terminal.
Preferably, the above steps may be implemented by a base station apparatus. In particular, the above method may be implemented by a processing module on or connected to the base station. In the present embodiment, a base station will be described and illustrated as an example.
The preset frequency band includes: a downlink frequency band, or a frequency band for uplink transmission on a special subframe.
Preferably, before step S302, the base station may further receive, through the uplink frequency band, capability information of the terminal device, where the capability information is used to indicate whether the terminal device has a capability of transmitting the SRS or the uplink data on the downlink frequency band. And after the base station receives the capability information of the terminal equipment, determining whether to send the configuration information to the user equipment according to the capability of the terminal equipment. For example, in the case that the terminal device does not have the capability of transmitting the SRS on the downlink frequency band, the terminal device may be instructed to transmit the SRS on the uplink frequency band in a conventional manner, or the terminal device may be informed of the SRS transmission on a preset frequency band such as an uplink pilot slot by configuring information.
Preferably, the configuration information includes, but is not limited to, at least one of: the configuration information of uplink and downlink, the configuration information of subframe group, and the sending parameters of SRS configured on downlink frequency band or in downlink control signaling. Other configuration information may also be conceivable as long as it can be used to instruct the terminal device to transmit the SRS on the downlink frequency band or the preset frequency band, and therefore, in the embodiment of the present invention, the configuration information is not limited to the above three types of configuration information.
Preferably, the transmission parameter of the SRS configured in the downlink frequency band may be a transmission period of the SRS configured in the downlink frequency band, and is used to instruct the terminal device to transmit the SRS in a subframe of the transmission period.
Preferably, the above-mentioned transmission period selectable values include: 2 milliseconds, 5 milliseconds, 10 milliseconds. A value of a transmission period has a certain relationship with a frame structure, for example, in the case that the transmission period is 2 milliseconds or 5 milliseconds, the transmission period is used for instructing a terminal device to transmit an SRS in an uplink pilot timeslot of a special subframe, wherein each radio frame on a downlink frequency band includes 2 special subframes; for another example, when the transmission period is 10ms, the transmission period is used to instruct the terminal device to transmit the SRS in the uplink pilot slot of a special subframe, where 1 special subframe is included in each radio frame on the downlink frequency band.
Preferably, the parameters of the SRS include one or more of the following information: cyclic shift information, frequency domain position, user-specific bandwidth, position of frequency comb, SRS bandwidth configuration information.
Preferably, the transmission parameter configured in the downlink control signaling may also be a request field of the SRS configured in the downlink control signaling, or other information configured in the downlink control signaling for instructing SRS transmission.
Preferably, when a value of a request field of the SRS configured in the downlink control signaling is a preset value, the request field is configured to: indicating that the terminal equipment sends the SRS on a downlink frequency band under the condition that the current communication system of the terminal equipment is a Frequency Division Duplex (FDD) system; and/or indicating that the terminal equipment sends the SRS in the uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system. The preset value is determined according to a preset setting, for example, when the request field can be set to 0 or 1 (that is, the preset value is 0 or 1), it indicates that the SRS is transmitted on the downlink frequency band; and then, sending the SRS according to the judged result by judging whether the current communication system is FDD or TDD. The value of the SRS sent by the request field in the downlink frequency band may be set to other values, which are only used as an exemplary description in the embodiment of the present invention, and does not mean that the preset value is only limited to the value in the exemplary description.
Preferably, the downlink control signaling includes one of the following: DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
Preferably, the radio frame structure indicated by the uplink and downlink configuration information includes 1 or 2 special subframes, where a next subframe of the special subframes is a downlink subframe. The uplink and downlink configuration information is used for instructing the terminal to transmit the SRS in the special subframe of the radio frame structure instructed by the terminal.
Preferably, the optional positions of the special subframes may be: and the subframe is positioned on the subframe with the subframe number of 0 or 1 or 2 or 5 or 6 or 9.
Preferably, the configuration information of the subframe group includes at least one of: indicating a first subframe group for transmitting an SRS in a downlink frequency band; and indicating a second subframe group for transmitting the SRS in the uplink frequency band. In some preferred embodiments, there may be only the first group of subframes; in other embodiments, the configuration information includes configuration information for the first group of subframes and the second group of subframes.
Preferably, the first subframe group is used to indicate: when the subframe where the downlink control signaling for triggering SRS transmission is located is in the first subframe group, transmitting the SRS triggered by the downlink control signaling in a downlink frequency band; the second subframe group is used for indicating: and when the subframe in which the downlink control signaling triggering the SRS transmission is located is in the second subframe group, transmitting the SRS triggered by the downlink control signaling in the uplink frequency band.
In this embodiment, a SRS transmission method is provided, and fig. 4 is a flowchart of the SRS transmission method according to the embodiment of the present invention, and as shown in fig. 4, the flowchart includes the following steps:
step S402, the terminal device receives configuration information for instructing the terminal device to transmit an SRS in a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
step S404, according to the configuration information, transmitting the SRS in the downlink frequency band or the preset frequency band.
Preferably, before the step S402, the terminal device transmits capability information of the terminal device to a transmitter of the configuration information, where the capability information is used to indicate whether the terminal device has a capability of transmitting the SRS on the downlink frequency band.
Preferably, the configuration information comprises at least one of: the configuration information of uplink and downlink, the configuration information of subframe group, and the sending parameters of SRS configured on downlink frequency band or in downlink control signaling.
Preferably, the SRS transmission parameters configured in the downlink frequency band include: a sending period of the SRS configured on the downlink frequency band; the transmission parameters configured in the downlink control signaling include: configuring an SRS request field in downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
Preferably, in step S404, if the configuration information includes a transmission period of the SRS configured in the downlink frequency band, the terminal device transmits the SRS in a subframe of the transmission period.
Preferably, when the configuration information includes a transmission period of the SRS configured in the downlink frequency band, transmitting the SRS in the downlink frequency band or the preset frequency band according to the configuration information includes: under the condition that the sending period is 2 milliseconds or 5 milliseconds, the terminal equipment sends the SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on a downlink frequency band comprises 2 special subframes; and/or under the condition that the transmission period is 10 milliseconds, the terminal equipment transmits the SRS in an uplink pilot frequency slot of the special sub-frame, wherein each radio frame on the downlink frequency band comprises 1 special sub-frame.
Preferably, the transmission parameter of the SRS configured on the downlink frequency band includes at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
Preferably, in step S404, when the configuration information includes a request field of the SRS configured in the downlink control signaling, and a value of the request field is a preset value: under the condition that the current communication system of the terminal equipment is a Frequency Division Duplex (FDD) system, the terminal equipment sends an SRS on a downlink frequency band; and/or the terminal equipment sends the SRS on the uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system.
Preferably, the downlink control signaling may be one of the following: DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
Preferably, the radio frame structure information indicated by the uplink and downlink configuration information includes: 1 or 2 special subframes, wherein the next subframe of the special subframes is a downlink subframe.
Preferably, the position of the special subframe is located on the subframe with subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6 or subframe number 9.
Preferably, the configuration information of the subframe group includes at least one of: indicating a first subframe group for transmitting an SRS in a downlink frequency band; and indicating a second subframe group for transmitting the SRS in the uplink frequency band.
Preferably, in a case that the configuration information includes configuration information of a subframe group, transmitting the SRS on the downlink frequency band or the preset frequency band according to the configuration information includes: when a subframe where a downlink control signaling for triggering SRS transmission is located is in a first subframe group, terminal equipment transmits an SRS triggered by the downlink control signaling in a downlink frequency band; and when the subframe in which the downlink control signaling for triggering the SRS to be sent is located is in the second subframe group, the terminal equipment sends the SRS triggered by the downlink control signaling in the uplink frequency band.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, an SRS indication sending apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of which have been already described are omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a block diagram of an apparatus for transmitting an SRS according to an embodiment of the present invention, as shown in fig. 5, the apparatus includes: a generating module 52 and a transmitting module 54, where the generating module 52 is configured to generate configuration information used for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; a first sending module 54, coupled to the generating module 52, is configured to send the configuration information to the terminal device.
Fig. 6 is a block diagram of a preferred structure of an SRS transmission apparatus according to an embodiment of the present invention, as shown in fig. 6, the apparatus preferably further includes: a receiving module 62, coupled to the generating module 52, configured to receive capability information of the terminal device from the uplink frequency band, where the capability information is used to indicate whether the terminal device has a capability of transmitting the SRS on the downlink frequency band.
Preferably, the configuration information comprises at least one of: the configuration information of uplink and downlink, the configuration information of subframe group, and the sending parameters of SRS configured on downlink frequency band or in downlink control signaling.
Preferably, the SRS transmission parameters configured in the downlink frequency band include: a sending period of the SRS configured on the downlink frequency band; the transmission parameters configured in the downlink control signaling include: configuring an SRS request field in downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
Preferably, the SRS transmission period configured on the downlink frequency band is used to instruct the terminal device to transmit the SRS on a subframe in the transmission period.
Preferably, the transmission period comprises one of: 2 milliseconds, 5 milliseconds, 10 milliseconds.
Preferably, when the transmission period is 2 milliseconds or 5 milliseconds, the transmission period is used to instruct the terminal device to transmit the SRS in the uplink pilot timeslot of the special subframe, where each radio frame on the downlink frequency band includes 2 special subframes; and/or under the condition that the transmission period is 10 milliseconds, the transmission period is used for instructing the terminal equipment to transmit the SRS in the uplink pilot frequency slot of the special sub-frame, wherein each radio frame on the downlink frequency band comprises 1 special sub-frame.
Preferably, the transmission parameter of the SRS configured on the downlink frequency band includes at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
Preferably, when a value of a request field of the SRS configured in the downlink control signaling is a preset value, the request field is configured to: indicating that the terminal equipment sends the SRS on a downlink frequency band under the condition that the current communication system of the terminal equipment is a Frequency Division Duplex (FDD) system; and/or indicating that the terminal equipment sends the SRS in the uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system.
Preferably, the downlink control signaling includes one of: DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
Preferably, the radio frame structure indicated by the uplink and downlink configuration includes 1 or 2 special subframes, where a next subframe of the special subframes is a downlink subframe.
Preferably, the special subframe is located at one or two of the following subframe numbers: subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe number 9.
Preferably, the configuration information of the subframe group includes at least one of: indicating a first subframe group for transmitting an SRS in a downlink frequency band; and indicating a second subframe group for transmitting the SRS in the uplink frequency band.
Preferably, the first subframe group is used to indicate: when the subframe where the downlink control signaling for triggering SRS transmission is located is in the first subframe group, transmitting the SRS triggered by the downlink control signaling in a downlink frequency band; the second subframe group is used for indicating: and when the subframe in which the downlink control signaling triggering the SRS transmission is located is in the second subframe group, transmitting the SRS triggered by the downlink control signaling in the uplink frequency band.
In this embodiment, there is also provided an SRS transmission apparatus, fig. 7 is a block diagram of a structure of an SRS transmission apparatus according to an embodiment of the present invention, and as shown in fig. 7, the apparatus is applied to a terminal device, and the apparatus includes: a receiving module 72 and a first sending module 74, where the receiving module 72 is configured to receive configuration information used for instructing a terminal device to send an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device; a first sending module 74, coupled to the receiving module 72, configured to send the SRS on the downlink frequency band or the preset frequency band according to the configuration information.
Fig. 8 is a block diagram of a preferred structure of an SRS transmission apparatus according to an embodiment of the present invention, and as shown in fig. 8, the apparatus preferably further includes: and a second sending module 82, coupled to the first receiving module 72, configured to send capability information of the terminal device to a sender of the configuration information, where the capability information is used to indicate whether the terminal device has a capability of sending an SRS on a downlink frequency band.
Preferably, the configuration information comprises at least one of: the configuration information of uplink and downlink, the configuration information of subframe group, and the sending parameters of SRS configured on downlink frequency band or in downlink control signaling.
Preferably, the SRS transmission parameters configured in the downlink frequency band include: a sending period of the SRS configured on the downlink frequency band; the transmission parameters configured in the downlink control signaling include: configuring an SRS request field in downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
Preferably, the first transmitting module 74 is configured to transmit the SRS on a subframe in a transmission period when the configuration information includes the transmission period of the SRS configured on the downlink frequency band.
Preferably, the transmission period comprises one of: 2 milliseconds, 5 milliseconds, 10 milliseconds.
Preferably, the first sending module 74 is configured to, when the configuration information includes a sending period of the SRS configured on the downlink frequency band: under the condition that the transmission period is 2 milliseconds or 5 milliseconds, transmitting an SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on a downlink frequency band comprises 2 special subframes; and/or transmitting the SRS in an uplink pilot time slot of a special subframe under the condition that the transmission period is 10 milliseconds, wherein each radio frame on a downlink frequency band comprises 1 special subframe.
Preferably, the transmission parameter of the SRS configured on the downlink frequency band includes at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
Preferably, the first sending module 74 is configured to, when the configuration information includes a request field of the SRS configured in the downlink control signaling, and a value of the request field is a preset value: sending an SRS on a downlink frequency band under the condition that a current communication system of the terminal equipment is a frequency division duplex FDD system; and/or sending the SRS on an uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system.
Preferably, the downlink control signaling includes one of: DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
Preferably, the radio frame structure indicated by the uplink and downlink configuration includes 1 or 2 special subframes, where a next subframe of the special subframes is a downlink subframe.
Preferably, the special subframe is located at one or two of the following subframe numbers: subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe number 9.
Preferably, the configuration information of the subframe group includes at least one of: indicating a first subframe group for transmitting an SRS in a downlink frequency band; and indicating a second subframe group for transmitting the SRS in the uplink frequency band.
Preferably, the first sending module 74 is configured to, in case that the configuration information includes configuration information of a subframe group: when a subframe where a downlink control signaling for triggering SRS transmission is located is in a first subframe group, transmitting an SRS triggered by the downlink control signaling in a downlink frequency band; and when the subframe in which the downlink control signaling for triggering the SRS to be sent is located is in the second subframe group, sending the SRS triggered by the downlink control signaling in the uplink frequency band.
In this embodiment, a base station is further provided, including: the SRS instruction transmitting apparatus described above.
In this embodiment, a terminal device is further provided, including: the above-described transmission apparatus for a sounding reference signal SRS.
In this embodiment, a system for transmitting an SRS is further provided, where the system includes: the SRS instruction transmitting device and the SRS transmitting device.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.
The embodiment of the present invention also provides software for executing the technical solutions described in the above embodiments and preferred embodiments.
The embodiment of the invention also provides a storage medium. In the present embodiment, the storage medium described above may be configured to store program code for performing the steps of:
s200, generating configuration information for instructing a terminal device to transmit an SRS in a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
s400, sending the configuration information to the terminal equipment.
The embodiment of the invention also provides a storage medium. In the present embodiment, the storage medium described above may be configured to store program code for performing the steps of:
s600, a terminal device receives configuration information for instructing the terminal device to transmit an SRS in a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
and S800, sending the SRS on the downlink frequency band or the preset frequency band according to the configuration information.
Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
In order that the description of the embodiments of the invention will be more apparent, reference is now made to the preferred embodiments for illustration.
Preferred embodiment 1
In this preferred embodiment, the base station issues SRS configuration information to the user terminal, where the configuration information includes: information for instructing the terminal device to transmit the SRS on the downlink frequency band; the information for instructing the terminal device to transmit the SRS in the downlink frequency band includes: an SRS transmission period configured on a downlink frequency band;
a base station configures an SRS sending period on a downlink frequency band for terminal equipment through a high-level RRC signaling, and when the terminal equipment is positioned on a subframe of the SRS sending period of the downlink frequency band, the terminal equipment sends an SRS on the subframe; for example, when the subframe index satisfies the following formula, the SRS is transmitted on the subframe.
(10·nf+kSRS-Toffset)modTSRS＝0
Wherein n isfIs the system frame number, kSRSIs a subframe index, ToffsetFor SRS subframe offset, TSRSFor SRS period, TSRSIs greater than or equal to 2 milliseconds;
when T isSRS>At2, kSRSThe values of (a) are shown in table 3, table 4 or table 5;
when T isSRSWhen 2, subframeIndex kSRSThe value of (k) is satisfiedSRS-Toffset)mod5＝0。
TABLE 3 subframe index Table one when SRS period is greater than 2
Figure BDA0000772785980000141
TABLE 4 subframe index Table II when SRS period is greater than 2
Figure BDA0000772785980000142
TABLE 5 subframe index Table III for SRS periods greater than 2
Figure BDA0000772785980000143
Preferably, the SRS transmission period may be 2 ms or 5ms or 10 ms;
preferred embodiment two
In this preferred embodiment, the base station issues SRS configuration information to the user terminal, where the configuration information includes: information for instructing the terminal device to transmit the SRS on the downlink frequency band; the information for instructing the terminal device to transmit the SRS in the downlink frequency band includes: an SRS transmission period configured on a downlink frequency band;
preferably, before setting the SRS configuration information, the base station receives capability information of the terminal device, which is sent by the terminal device, where the capability information is used to indicate whether the terminal device has a capability of sending the SRS or uplink data in a downlink frequency band.
When the terminal device has the capability of transmitting the uplink SRS in the downlink frequency band and the base station has the capability of receiving the uplink SRS in the downlink frequency band, the base station may configure an SRS transmission period in the downlink frequency band to the terminal device, and at the same time, the frame structure in the downlink frequency band is adjusted to a frame structure including the special subframe.
When the SRS transmission period is 2 milliseconds or 5 milliseconds, it indicates that each radio frame on the downlink frequency band includes 2 special subframes, and the terminal device transmits the SRS in the uplink pilot time slot of the special subframe; when the SRS transmission period is 10ms, it indicates that each radio frame on the downlink frequency band includes 1 special subframe, and the terminal device transmits the SRS in the uplink pilot timeslot of the special subframe.
Preferred embodiment three
The sending method of the sounding reference signal provided in the preferred embodiment is implemented by a system including a base station and a user terminal (corresponding to the terminal device). The base station sets configuration information of the SRS and issues the configuration information of the SRS to the terminal equipment; the configuration information includes: information for instructing the terminal device to transmit the SRS on the downlink frequency band;
preferably, the information for instructing the terminal device to transmit the SRS in the downlink frequency band includes: an SRS request domain in the downlink control signaling and information used for indicating SRS sending in the downlink control signaling;
preferably, the SRS request field in the downlink control signaling includes: when the value of the SRS request field in the downlink control signaling is effective and a communication system of the base station and the terminal equipment is an FDD system, indicating that the terminal equipment is instructed to send the SRS on a downlink frequency band; when the value of the SRS request domain in the downlink control signaling is effective and the communication system of the base station and the terminal equipment is a TDD system, indicating that the terminal equipment is instructed to transmit the SRS on an uplink frequency band; and when the value of the SRS request field is 0 or 1, the value is effective.
The information for indicating SRS transmission in the downlink control signaling includes: the downlink control signaling is information used for indicating SRS sending in existing DCI format 2B, DCI format 2C or DCI format2D in LTE-A Release 12 or DCI format2E or DCI format 2F newly added in LTE-A subsequent evolution edition;
and the terminal equipment transmits the SRS according to the received SRS configuration information. Preferably, the information in the DCI format2E or DCI format 2F for indicating SRS transmission may be 2 bits, and as shown in table 6 or table 7 or table 8, the information may be represented by an SRS request field.
TABLE 6 meanings of SRS request field one
Dereferencing of SRS request fields Description of the invention
’00’ No SRS trigger
‘01’ Triggering SRS to transmit in uplink frequency band
‘10’ Triggering SRS transmission in downlink frequency band
‘11’ Reservation
TABLE 7 SRS request field meaning two
Dereferencing of SRS request fields Description of the invention
’00’ No SRS trigger
‘01’ Triggering SRS transmission in downlink frequency band
‘10’ Triggering SRS to transmit in uplink frequency band
‘11’ Reservation
TABLE 8 implications of SRS request field three
Dereferencing of SRS request fields Description of the invention
’00’ No SRS trigger
‘01’ Triggering SRS to transmit in uplink frequency band
‘10’ Triggering SRS transmission in downlink frequency band
‘11’ Triggering SRS transmission in downlink and uplink frequency bands
It should be noted that the meaning of the request field is used as an illustration of the embodiment of the present invention, and it is not meant to indicate that the meaning of the SRS request field is limited to the three ways illustrated above.
Preferred embodiment four
In this preferred embodiment, the base station issues SRS configuration information to the terminal device, where the SRS configuration information includes: configuration information of uplink and downlink;
preferably, the uplink and downlink configuration information includes: the radio frame structure information of the uplink and downlink configuration indication includes 1 or 2 special subframes (special subframes), and the next subframe of the special subframes is a downlink subframe;
preferably, the position of the special subframe is located on the subframe with subframe number of 0 or subframe number of 1 or subframe number of 2 or subframe number of 6 or subframe number of 9;
preferably, the number of the downlink pilot time slots DwPTS included in the special subframe is N, where N is a certain integer between 8 and 12, including 8 and 12;
and the terminal equipment performs uplink and downlink subframe configuration and sends the SRS on the special subframe according to the uplink and downlink configuration information configured by the base station.
Preferred embodiment five
In this preferred embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: the terminal equipment feeds back capability information of the terminal equipment to the base station, wherein the capability information comprises whether the terminal equipment has the capability of sending SRS or uplink data on a downlink frequency band;
the base station receives the capability information fed back by the terminal equipment through the uplink frequency band, then judges whether the base station has the capability of performing uplink receiving on the downlink frequency band, and if the capability is provided, the base station can issue the configuration information of the SRS to the user terminal and instruct the terminal equipment to transmit the SRS on the downlink frequency band.
Preferred embodiment six
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: configuration information of subframe groups;
the configuration information of the subframe group comprises a subframe group 1 and a subframe group 2, or a subframe set 1 and a subframe set 2;
when the subframe where the DCI signaling triggering SRS transmission is located is in subframe group 1 or subframe set 1, it means that the triggered SRS is transmitted in the downlink frequency band; when the subframe in which the DCI signaling triggering SRS transmission is located is in subframe group 2 or subframe set 2, it means that the triggered SRS is transmitted in the uplink frequency band.
Or, when the subframe in which the DCI signaling triggering SRS transmission is located is in subframe group 2 or subframe set 2, it indicates that the triggered SRS is transmitted in the downlink frequency band; when the subframe in which the DCI signaling triggering SRS transmission is located is in subframe group 1 or subframe set 1, it means that the triggered SRS is transmitted in the uplink frequency band.
In summary, through the above embodiments and the preferred embodiments of the present invention, a new mode for sending the sounding reference signal is added. Through the above embodiment or the preferred embodiment, the terminal device can send the SRS on the downlink frequency band, which solves the problem of channel reciprocity utilized by the existing FDD system, reduces the resource overhead of downlink pilot frequency and reduces the feedback amount of the UE, thereby more reliably utilizing the channel reciprocity to realize better transmission performance of the FD-MIMO/Massive-MIM system, and further achieving the effect of improving the overall performance of the system.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (28)

1. An indication sending method for measuring a reference signal (SRS), comprising:
generating configuration information for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
sending the configuration information to the terminal equipment;
the configuration information includes at least one of:
uplink and downlink configuration information, subframe group configuration information, and SRS transmission parameters configured on the downlink frequency band or in downlink control signaling;
the configuration information of the subframe group includes at least one of:
indicating a first subframe group for transmitting the SRS in the downlink frequency band;
indicating a second subframe group to transmit the SRS in an uplink frequency band.
2. The method of claim 1, wherein prior to generating the configuration information, the method further comprises:
and receiving capability information of the terminal equipment from an uplink frequency band, wherein the capability information is used for indicating whether the terminal equipment has the capability of transmitting the SRS on the downlink frequency band.
3. The method of claim 1,
the transmission parameters of the SRS configured on the downlink frequency band include: configuring a transmission period of the SRS on the downlink frequency band;
the sending parameters configured in the downlink control signaling include: configuring an SRS request field in the downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
4. The method of claim 3, wherein the transmission period of the SRS configured in the downlink frequency band is used for instructing the terminal device to transmit the SRS in a subframe located in the transmission period.
5. The method of claim 3, wherein the transmission period comprises one of:
2 milliseconds, 5 milliseconds, 10 milliseconds.
6. The method of claim 5,
under the condition that the sending period is 2 milliseconds or 5 milliseconds, the sending period is used for instructing the terminal equipment to send the SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on the downlink frequency band comprises 2 special subframes; and/or
And under the condition that the transmission period is 10 milliseconds, the transmission period is used for instructing the terminal device to transmit the SRS in an uplink pilot timeslot of a special subframe, wherein each radio frame on the downlink frequency band includes 1 special subframe.
7. The method of claim 1, wherein the transmission parameters of the SRS configured on the downlink frequency band comprise at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
8. The method of claim 3, wherein, when a value of the request field of the SRS configured in the downlink control signaling is a preset value, the request field is configured to:
indicating that the terminal device transmits the SRS on the downlink frequency band under the condition that a current communication system of the terminal device is a Frequency Division Duplex (FDD) system; and/or
And indicating that the terminal equipment sends the SRS on an uplink frequency band under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system.
9. The method of claim 1, wherein the downlink control signaling comprises one of:
downlink control information DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
10. The method of claim 1, wherein a radio frame structure of the uplink and downlink configuration indication comprises 1 or 2 special subframes, and wherein a next subframe of the special subframes is a downlink subframe.
11. The method of claim 10, wherein the special subframe is located at one or two of the following subframe numbers:
subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe number 9.
12. The method of claim 11,
the first subframe group is used for indicating that: when the subframe where the downlink control signaling for triggering SRS transmission is located is in the first subframe group, transmitting the SRS triggered by the downlink control signaling in the downlink frequency band;
the second subframe group is used for indicating that: and when the subframe where the downlink control signaling for triggering SRS transmission is located is in the second subframe group, transmitting the SRS triggered by the downlink control signaling in the uplink frequency band.
13. A method for transmitting a Sounding Reference Signal (SRS), comprising:
the method comprises the steps that terminal equipment receives configuration information used for indicating the terminal equipment to send SRS on a downlink frequency band or a preset frequency band, wherein the preset frequency band comprises: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
according to the configuration information, the SRS is sent on the downlink frequency band or the preset frequency band;
the configuration information includes at least one of:
uplink and downlink configuration information, subframe group configuration information, and SRS transmission parameters configured on the downlink frequency band or in downlink control signaling;
the configuration information of the subframe group includes at least one of:
indicating a first subframe group for transmitting the SRS in the downlink frequency band;
indicating a second subframe group to transmit the SRS in an uplink frequency band.
14. The method of claim 13, wherein before the terminal device receives the configuration information, the method further comprises:
and the terminal equipment sends capability information of the terminal equipment to a sender of the configuration information, wherein the capability information is used for indicating whether the terminal equipment has the capability of sending the SRS on the downlink frequency band.
15. The method of claim 13,
the transmission parameters of the SRS configured on the downlink frequency band include: configuring a transmission period of the SRS on the downlink frequency band;
the sending parameters configured in the downlink control signaling include: configuring an SRS request field in the downlink control signaling, or configuring information used for indicating SRS transmission in the downlink control signaling.
16. The method of claim 15, wherein, when the configuration information includes a transmission period of an SRS configured in the downlink frequency band, transmitting the SRS in the downlink frequency band or the preset frequency band according to the configuration information comprises:
and the terminal equipment transmits the SRS on the subframe in the transmission period.
17. The method of claim 15, wherein the transmission period comprises one of:
2 milliseconds, 5 milliseconds, 10 milliseconds.
18. The method of claim 17, wherein if the configuration information includes a transmission period of an SRS configured in the downlink frequency band, transmitting the SRS in the downlink frequency band or the preset frequency band according to the configuration information comprises:
under the condition that the sending period is 2 milliseconds or 5 milliseconds, the terminal equipment sends the SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on the downlink frequency band comprises 2 special subframes; and/or
And under the condition that the transmission period is 10 milliseconds, the terminal equipment transmits the SRS in an uplink pilot frequency slot of a special subframe, wherein each radio frame on the downlink frequency band comprises 1 special subframe.
19. The method of claim 13, wherein the transmission parameters of the SRS configured on the downlink frequency band comprise at least one of: cyclic shift information, frequency domain position information, user-specific bandwidth, position information of a frequency comb, and SRS bandwidth configuration information.
20. The method of claim 15, wherein when the configuration information includes the request field of the SRS configured in the downlink control signaling, and a value of the request field is a preset value, transmitting the SRS on the downlink frequency band or the preset frequency band according to the configuration information comprises:
the terminal equipment transmits the SRS on the downlink frequency band under the condition that the current communication system of the terminal equipment is a Frequency Division Duplex (FDD) system; and/or
And under the condition that the current communication system of the terminal equipment is a Time Division Duplex (TDD) system, the terminal equipment sends the SRS on an uplink frequency band.
21. The method of claim 15, wherein the downlink control signaling comprises one of:
downlink control information DCI format 2B, DCI format 2C, DCI format2D, DCI format2E, and DCI format 2F.
22. The method of claim 15, wherein a radio frame structure of the uplink and downlink configuration indication comprises 1 or 2 special subframes, and wherein a next subframe of the special subframes is a downlink subframe.
23. The method of claim 22, wherein the special sub-frame is located at one or two of the following sub-frame numbers:
subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe number 9.
24. The method of claim 13, wherein, in case that the configuration information includes configuration information of the subframe group, transmitting the SRS on the downlink frequency band or the preset frequency band according to the configuration information comprises:
when the subframe where the downlink control signaling for triggering SRS transmission is located is in the first subframe group, the terminal equipment transmits the SRS triggered by the downlink control signaling in the downlink frequency band;
and when the subframe in which the downlink control signaling for triggering SRS transmission is located is in the second subframe group, the terminal equipment transmits the SRS triggered by the downlink control signaling in the uplink frequency band.
25. An indication transmission apparatus for measuring a reference signal (SRS), comprising:
a generating module, configured to generate configuration information for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
a sending module, configured to send the configuration information to the terminal device;
a receiving module, configured to receive capability information of the terminal device from an uplink frequency band, where the capability information is used to indicate whether the terminal device has a capability of transmitting the SRS on the downlink frequency band; wherein the content of the first and second substances,
the configuration information includes at least one of:
uplink and downlink configuration information, subframe group configuration information, and SRS transmission parameters configured on the downlink frequency band or in downlink control signaling;
the configuration information of the subframe group includes at least one of:
indicating a first subframe group for transmitting the SRS in the downlink frequency band;
indicating a second subframe group to transmit the SRS in an uplink frequency band.
26. A sending device for measuring a reference signal (SRS) is applied to terminal equipment, and is characterized by comprising:
a receiving module, configured to receive configuration information used for instructing a terminal device to transmit an SRS on a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied for uplink transmission of the terminal device;
a first sending module, configured to send the SRS in the downlink frequency band or the preset frequency band according to the configuration information;
a second sending module, configured to send capability information of the terminal device to a sender of the configuration information, where the capability information is used to indicate whether the terminal device has a capability of sending the SRS on the downlink frequency band; wherein the content of the first and second substances,
the configuration information includes at least one of:
uplink and downlink configuration information, subframe group configuration information, and SRS transmission parameters configured on the downlink frequency band or in downlink control signaling;
the configuration information of the subframe group includes at least one of:
indicating a first subframe group for transmitting the SRS in the downlink frequency band;
indicating a second subframe group to transmit the SRS in an uplink frequency band.
27. A base station, comprising: indication transmitting device of sounding reference signals, SRSs, according to claim 25.
28. A terminal device, characterized by comprising: the apparatus for transmitting sounding reference signals, SRSs, according to claim 26.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111446995A (en) 2017-04-18 2020-07-24 上海朗帛通信技术有限公司 Method and device for user equipment and base station for multi-antenna transmission
CN113225170A (en) 2017-09-30 2021-08-06 中兴通讯股份有限公司 Wireless communication method and device
CN109802779B (en) * 2017-11-16 2024-01-16 华为技术有限公司 Reference signal processing method, network equipment and terminal equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101754230A (en) * 2008-12-17 2010-06-23 华为技术有限公司 Carrier polymerizing method in FDD system and device thereof
CN102088303A (en) * 2010-02-11 2011-06-08 大唐移动通信设备有限公司 SRS (sounding reference signal) transmitting method, and triggering method and device for triggering SRS transmitting
CN103327597A (en) * 2012-03-21 2013-09-25 北京三星通信技术研究有限公司 Power control method of SRS, base station and terminal device
CN104518845A (en) * 2013-09-27 2015-04-15 中兴通讯股份有限公司 Method and system for configuring power control parameter of sounding reference signal in time division duplex system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8824420B2 (en) * 2007-03-22 2014-09-02 Mitsubishi Electric Research Laboratories, Inc. Method and system for generating antenna selection signals in OFDM tranceivers with fewer RF chains than antennas in MIMO wireless networks
CN102282822B (en) * 2009-03-11 2013-11-06 华为技术有限公司 Method, device and system for identifying different frame structures
CN105099632B (en) * 2014-04-23 2019-12-13 北京三星通信技术研究有限公司 Method and equipment for transmitting uplink sounding reference signal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101754230A (en) * 2008-12-17 2010-06-23 华为技术有限公司 Carrier polymerizing method in FDD system and device thereof
CN102088303A (en) * 2010-02-11 2011-06-08 大唐移动通信设备有限公司 SRS (sounding reference signal) transmitting method, and triggering method and device for triggering SRS transmitting
CN103327597A (en) * 2012-03-21 2013-09-25 北京三星通信技术研究有限公司 Power control method of SRS, base station and terminal device
CN104518845A (en) * 2013-09-27 2015-04-15 中兴通讯股份有限公司 Method and system for configuring power control parameter of sounding reference signal in time division duplex system

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