CN106559195B

CN106559195B - Method and device for sending measurement reference signal

Info

Publication number: CN106559195B
Application number: CN201510623572.XA
Authority: CN
Inventors: 王瑜新; 李儒岳; 陈艺戬; 鲁照华; 李永; 肖华华; 吴昊; 蔡剑兴
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-09-25
Filing date: 2015-09-25
Publication date: 2020-11-20
Anticipated expiration: 2035-09-25
Also published as: CN106559195A

Abstract

The invention provides a method and a device for sending a measurement reference signal. Wherein, the method comprises the following steps: the user equipment transmits a Sounding Reference Signal (SRS) to the base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot; under the condition that no time domain symbol occupied by the guard interval in the special subframe supports sending the SRS, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10. By the method and the device, the problem that the SRS cannot be transmitted on the increased time domain symbol is solved, and the SRS can be transmitted on the increased time domain symbol.

Description

Method and device for sending measurement reference signal

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for sending a sounding reference signal.

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. In the frame structure of the FDD mode, as shown in fig. 1, a 10 millisecond (ms) radio frame is composed of twenty slots (slots) with the length of 0.5ms and the number of 0-19, and the slots 2i and 2i +1 constitute a subframe (subframe) i with the length of 1 ms. In TDD mode, 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 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 T_sIs defined as T _s1/(15000 × 2048) seconds, the supported Uplink and Downlink configurations are shown in table 1 below, where for each subframe in a radio frame, "D" denotes a subframe dedicated for Downlink transmission, "U" denotes a subframe dedicated for Uplink transmission, "S" denotes a special subframe for three fields, namely, Downlink Pilot Time Slot (DwPTS), Guard Period (GP) and Uplink Pilot Time Slot (UpPTS), the lengths of DwPTS and UpPTS are shown in table 2, and 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 T_slot＝15360·T_s＝0.5ms。

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.

TABLE 1 UL/DL configurations

TABLE 2 Special subframe configuration (DwPTS/GP/UpPTS length)

In LTE, the 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, and the like. 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.

The broadcast Information of the LTE system is divided into a master message block (MIB) and a system message block (SIB), wherein the MIB is transmitted on a Physical Broadcast Channel (PBCH), and the SIB is transmitted on a Physical Downlink Shared Channel (PDSCH) (also called SI, Scheduled Information). The SIB information is transmitted in several SIs according to the different scheduling requirements (e.g. period), and the system supports at least 4 SIs (i.e. SIB-1, SIB-2, SIB-3, SIB-4)

A Sounding Reference Signal (SRS) is a Signal between a terminal device and a base station for measuring wireless Channel 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 regular time according to parameters such as bandwidth, frequency domain position, sequence cyclic shift, 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 the same SRS bandwidth, multiple UEs may use different cyclic shifts on the same frequency comb and then transmit SRS through code division multiplexing, or two UEs may transmit SRS through frequency division multiplexing on different frequency combs. For example, in the LTE system, a UE transmitting an SRS within a certain SRS bandwidth (4 RBs) may use 8 cyclic shifts and 2 frequency combs, so that the UE has 16 resources available for transmitting the SRS in total, that is, at most 16 SRS may be transmitted simultaneously within the SRS bandwidth. Since an LTE system does not support uplink Single User Multiple Input Multiple Output (SU-MI MO), a UE can only have one antenna to transmit an SRS at each time, and thus only one UE needs one SRS resource, and therefore, the system can multiplex 16 UEs at most simultaneously within the SRS bandwidth.

An LTE-Advanced (LTE-Advanced, abbreviated as LTE-a) system is a next-generation evolution system of the LTE system, supports SU-MIMO in uplink, and can use 4 antennas at most as uplink transmission antennas. That is, the UE may transmit SRS on multiple antennas at the same time, and the eNB needs to estimate the state on each channel according to the SRS received on each antenna.

In the existing research of LTE-a, it is proposed: in uplink communication, non-precoded (i.e., antenna-specific) SRS should be used. 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. In addition, besides reserving the original period (periodic) of the LTE to transmit the SRS, the UE may also be configured by downlink control information or higher layer signaling to aperiodically (aperiodic) transmit the SRS.

For example, within a certain SRS bandwidth (4 RBs), if each UE transmits SRS using 4 antennas, the number of resources required by each UE is 4. According to the above-mentioned number of SRS resources that can be supported in one SRS bandwidth is 16 in total, the number of UEs that can be multiplexed in this SRS bandwidth is reduced to 4. The number of users that can be multiplexed simultaneously in the system is 1/4 of the original LTE. In the existing research of LTE-a Release 10(LTE-a Release 10), it is proposed that the UE may send the SRS through two triggering modes, namely, a higher layer signaling (also referred to as trigger through trigger type 0) or downlink control information (also referred to as trigger through trigger type 1), where the triggering mode based on the higher layer signaling is a periodic SRS and the triggering mode based on the downlink control information is an aperiodic SRS. 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.

In the future LTE-a Release 13(LTE-a Release 13) research, under the scenario of configuring MIMO (Full Dimension-MIMO, abbreviated as FD-MIMO) with complete dimensions or MIMO (Massive-MIMO) with a large number of antennas, along with the increase of SRS measurement requirements due to TDD channel reciprocity and the increase of the number of multiplexing users, the existing SRS multiplexing capacity has become difficult to meet the requirements.

In the related art, a way of increasing a time domain symbol (e.g., UpPTS) for transmitting the SRS is proposed, however, an effective solution has not been proposed yet how to transmit the SRS on the increased time domain symbol.

Disclosure of Invention

The invention provides a method and a device for sending a Sounding Reference Signal (SRS), which at least solve the problem that the SRS can not be sent on an increased time domain symbol in the related art.

According to an aspect of the present invention, there is provided a sounding reference signal, SRS, transmitting method, including: the user equipment transmits a Sounding Reference Signal (SRS) to the base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot;

and when none of the time domain symbols occupied by the guard interval in the special subframe supports sending the SRS, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10.

Optionally, before the ue transmits the SRS to the base station on the special subframe, the method further includes: the user equipment receives Radio Resource Control (RRC) signaling, wherein the RRC signaling is used for indicating the number of time domain symbols occupied by a guard interval for transmitting an SRS in the special subframe or indicating the number of time domain symbols occupied by an increased uplink pilot time slot.

Optionally, one or more time domain symbols in the time domain symbols occupied by the guard interval are adjacent to the time domain symbols occupied by the uplink pilot time slot.

Optionally, the number of time domain symbols occupied by the guard interval is greater than 3.

Optionally, before the ue transmits the SRS to the base station on the special subframe, the method further includes: the user equipment receives a special subframe configuration, wherein the special subframe configuration is at least used for indicating the number of time domain symbols occupied by the uplink pilot time slot in the special subframe.

Optionally, before the ue transmits the SRS to the base station in the special subframe, the method further includes: the user equipment receives configuration information sent by a base station, wherein the configuration information comprises at least one of the following: configuring SRS transmission period and subframe offset of the user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; OCC indication information;

the user equipment transmitting the SRS to the base station on the special subframe comprises: and the user equipment sends the SRS to the base station according to the configuration information.

Optionally, the transmitting, by the user equipment, the SRS to the base station on the special subframe includes: the UE transmits the SRS to the base station according to predefined configuration information, wherein the predefined configuration information comprises at least one of the following: configuring SRS transmission period and subframe offset of the user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; the OCC indication information.

Optionally, the SRS transmission period and subframe offset configuration of the user equipment include at least one of:

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 0 and 4;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 0 and 5;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 0 and 6;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 1 and 4;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 1 and 5;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 1 and 6;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 2 and 4;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 2 and 5;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 2 and 6;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 3 and 4;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 3 and 5;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 3 and 6;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 4 and 5;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 4 and 6;

the SRS sending period value of the user equipment is 2, and the SRS subframe offset values are 5 and 6.

Optionally, the correspondence between the subframe index, the uplink pilot slot index, and the SRS transmission subframe index includes at least one of the following:

when the subframe index is 1 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 0;

when the subframe index is 1 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 1;

when the subframe index is 1 and is the 3 rd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 2;

when the subframe index is 1 and is the 4 th time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 3;

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 6 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 7;

when the subframe index is 6 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 8;

when the subframe index is 6 and is the 3 rd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 9;

when the subframe index is 6 and is the 4 th time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 10;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 1 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 0;

when the subframe index is 1 and is the 3 rd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 1;

when the subframe index is 1 and is the 4 th time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 1;

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 6 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 5;

when the subframe index is 6 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 5;

when the subframe index is 6 and is the 3 rd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 6;

when the subframe index is 6 and is the 4 th time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

Optionally, the corresponding relationship among the subframe index, the guard interval symbol index, the uplink pilot slot index, and the SRS transmission subframe index includes at least one of:

when the subframe index is 1 and is the 1 st time domain symbol occupied by the guard interval, the subframe index of sending the SRS is 0;

when the subframe index is 1 and is the 2 nd time domain symbol occupied by the guard interval, the subframe index of sending the SRS is 1;

when the subframe index is 1 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 2;

when the subframe index is 1 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 3;

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 6 and is the 1 st time domain symbol occupied by the guard interval, the transmission subframe index of the SRS is 7;

when the subframe index is 6 and is the 2 nd time domain symbol occupied by the guard interval, the transmission subframe index of the SRS is 8;

when the subframe index is 6 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 9;

when the subframe index is 6 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 10;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 1 and is the 2 nd time domain symbol occupied by the guard interval, the subframe index of sending the SRS is 0;

when the subframe index is 1 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 1;

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 6 and is the 1 st time domain symbol occupied by the guard interval, the subframe index of sending the SRS is 5;

when the subframe index is 6 and is the 2 nd time domain symbol occupied by the guard interval, the subframe index of sending the SRS is 5;

when the subframe index is 6 and is the 1 st time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 6;

when the subframe index is 6 and is the 2 nd time domain symbol occupied by the uplink pilot time slot, the sending subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

Optionally, the OCC enable information is used to indicate whether OCC is enabled.

Optionally, the OCC indication information is used to: under the condition that OCC is enabled and the number of time domain symbols occupied by the uplink pilot time slot of the special subframe is 4, performing time domain OCC expansion on the 1 st uplink pilot time slot time domain symbol and the 2 nd uplink pilot time slot time domain symbol according to the OCC indication information, and performing time domain OCC expansion on the 3 rd uplink pilot time slot time domain symbol and the 4 th uplink pilot time slot time domain symbol; alternatively, the first and second electrodes may be,

and under the condition that the number of time domain symbols used for sending the SRS in the time domain symbols occupied by the guard interval of the special subframe is 2 and the number of time domain symbols occupied by the uplink pilot time slot of the special subframe is 2, performing time domain OCC expansion on the 1 st GP time domain symbol and the 2 nd GP time domain symbol according to the OCC indication information, and performing time domain OCC expansion on the 1 st uplink pilot time slot time domain symbol and the 2 nd uplink pilot time slot time domain symbol.

Optionally, the OCC indication information includes: first OCC indication information for indicating that the user equipment uses [ +1, +1] as an orthogonal mask, and second OCC indication information for indicating that the user equipment uses [ +1, -1] as an orthogonal mask.

Optionally, when an SRS transmission period is 2, the user equipment transmits the SRS to the base station on a subframe satisfying the following relationship: (transmission subframe index of SRS-SRS subframe offset value) mod7 ═ 0, where mod is a modulo function.

Optionally, in a case that none of time domain symbols occupied by a guard interval in the special subframe support SRS transmission, the special subframe configuration includes: a special subframe configuration 10, where the special subframe configuration 10 is at least used to indicate that the number of time domain symbols occupied by an uplink pilot time slot in the special subframe is N, where N is an integer and N is greater than or equal to 3 and less than or equal to 10.

Optionally, a value of N is one of: 3. 4, 5 and 6.

According to another aspect of the present invention, there is also provided a sounding reference signal, SRS, transmitting apparatus, applied to a user equipment, including: a sending module, configured to send a Sounding Reference Signal (SRS) to a base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot; and when none of the time domain symbols occupied by the guard interval in the special subframe supports sending the SRS, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10.

Optionally, the apparatus further comprises: a first receiving module, configured to receive a radio resource control RRC signaling, where the RRC signaling is used to indicate a number of time domain symbols occupied by a guard interval for transmitting an SRS in the special subframe or indicate a number of time domain symbols occupied by an uplink pilot timeslot to be increased.

Optionally, the apparatus further comprises: a second receiving module, configured to receive a special subframe configuration, where the special subframe configuration is at least used to indicate the number of time domain symbols occupied by the uplink pilot timeslot in the special subframe.

Optionally, the apparatus further comprises: a third receiving module, configured to receive configuration information sent by a base station, where the configuration information includes at least one of: configuring SRS transmission period and subframe offset of the user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; OCC indication information;

the sending module is configured to send the SRS to the base station according to the configuration information.

Optionally, the sending module is configured to send the SRS to the base station according to predefined configuration information, where the predefined configuration information includes at least one of: configuring SRS transmission period and subframe offset of the user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; the OCC indication information.

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

Optionally, the sending module is configured to send, to the base station, the SRS in a subframe that satisfies a following relationship when an SRS transmission period is 2: (transmission subframe index of SRS-SRS subframe offset value) mod7 ═ 0, where mod is a modulo function.

Optionally, a value of N is one of: 3. 4, 5 and 6.

By the invention, the user equipment is adopted to send the SRS to the base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot; under the condition that no time domain symbol occupied by the guard interval in the special subframe supports SRS transmission, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10, the problem that the SRS cannot be transmitted on the increased time domain symbols is solved, and the SRS can be transmitted on the increased time domain symbols.

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 an alternative flowchart one of a sounding reference signal transmission method according to an embodiment of the present invention;

fig. 4 is an alternative flowchart of a sounding reference signal transmission method according to an embodiment of the present invention;

fig. 5 is a third alternative flowchart of a sounding reference signal transmission method according to an embodiment of the present invention;

fig. 6 is a block diagram of an alternative structure of a measurement reference signal transmission apparatus according to an embodiment of the present invention;

fig. 7 is a block diagram of an alternative configuration of a sounding reference signal transmitting apparatus according to an embodiment of the present invention;

fig. 8 is a block diagram of an alternative configuration of a measurement reference signal transmission apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram of the time domain position of SRS transmission on UpPTS2 according to an alternative embodiment of the present invention;

fig. 10 is a schematic diagram of time domain locations for transmitting SRS over a guard interval according to an alternative 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.

In this embodiment, a method for sending a sounding reference signal SRS is provided, the method including the following steps:

step S302, the user equipment sends a Sounding Reference Signal (SRS) to the base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot; under the condition that no time domain symbol occupied by the guard interval in the special subframe supports sending the SRS, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10.

Through the steps, a mode of sending the SRS on one or more time domain symbols in the time domain symbols occupied by the guard interval and/or one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot is adopted, wherein the number of the time domain symbols occupied by the uplink pilot time slot is more than 2 under the condition that the time domain symbols occupied by the guard interval in the special subframe do not support sending the SRS. Compared with the prior art that the SRS can only be transmitted on the uplink pilot frequency time slot with the length of two time domain symbols at most, but the SRS cannot be transmitted on more than two time domain symbols or the time domain symbols occupied by the guard interval, the method and the device solve the problem that the SRS cannot be transmitted on the increased time domain symbols any more, and realize the transmission of the SRS on the increased time domain symbols.

Fig. 3 is an optional flowchart one of the method for sending a sounding reference signal according to an embodiment of the present invention, as shown in fig. 3, optionally before the ue sends an SRS to the base station on a special subframe, the process further includes the following steps:

in step S300a, the ue receives a radio resource control RRC signaling, where the RRC signaling is used to indicate the number of time domain symbols occupied by a guard interval for transmitting SRS in the special subframe or indicate the number of time domain symbols occupied by an uplink pilot timeslot to be increased.

Optionally, one or more of the time domain symbols occupied by the guard interval are adjacent to the time domain symbol occupied by the uplink pilot time slot.

Fig. 4 is an optional flowchart of a sounding reference signal transmission method according to an embodiment of the present invention, and as shown in fig. 4, optionally before the ue transmits the SRS to the base station on the special subframe, the process further includes the following steps:

step S300b, the ue receives a special subframe configuration, where the special subframe configuration is at least used to indicate the number of time domain symbols occupied by the uplink pilot timeslot in the special subframe.

Fig. 5 is a third optional flow chart of a method for sending a sounding reference signal according to an embodiment of the present invention, as shown in fig. 5, optionally, before the ue sends an SRS to the base station in a special subframe, the flow further includes the following steps:

step S300c, the ue receives configuration information sent by the base station, where the configuration information includes at least one of the following: configuring SRS transmission period and subframe offset of user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; OCC indication information; the method for the user equipment to transmit the SRS to the base station on the special subframe comprises the following steps: and the user equipment sends the SRS to the base station according to the configuration information.

Optionally, the sending, by the user equipment, the SRS to the base station on the special subframe includes: the user equipment transmits the SRS to the base station according to predefined configuration information, wherein the predefined configuration information comprises at least one of the following: configuring SRS transmission period and subframe offset of user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; the OCC indication information.

the SRS transmission period value of the user equipment is 2, and the SRS subframe offset values are 5 and 6.

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

Optionally, the correspondence between the subframe index and the uplink pilot slot index and the SRS transmission subframe index includes at least one of the following:

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

Optionally, under the condition that OCC is enabled and the number of time domain symbols occupied by the uplink pilot time slot of the special subframe is 4, performing time domain OCC extension on the 1 st uplink pilot time slot time domain symbol and the 2 nd uplink pilot time slot time domain symbol according to the OCC indication information, and performing time domain OCC extension on the 3 rd uplink pilot time slot time domain symbol and the 4 th uplink pilot time slot time domain symbol; or, under the condition that the number of time domain symbols used for sending the SRS in the time domain symbols occupied by the guard interval of the special subframe is 2 and the number of time domain symbols occupied by the uplink pilot time slot of the special subframe is 2, performing time domain OCC expansion on the 1 st GP time domain symbol and the 2 nd GP time domain symbol according to the OCC indication information, and performing time domain OCC expansion on the 1 st uplink pilot time slot time domain symbol and the 2 nd uplink pilot time slot time domain symbol.

Optionally, when the SRS transmission period is 2, the user equipment transmits the SRS to the base station on a subframe satisfying the following relationship: (transmission subframe index of SRS-SRS subframe offset value) mod7 ═ 0, where mod is a modulo function.

Optionally, when none of the time domain symbols occupied by the guard interval in the special subframe supports SRS transmission, the special subframe configuration includes: the special subframe configuration 10 is at least used for indicating that the number of time domain symbols occupied by an uplink pilot time slot in the special subframe is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10.

Optionally, a value of N is one of: 3. 4, 5 and 6.

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, a measurement reference signal sending apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. 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.

The apparatus for sending SRS for measurement reference signals provided in this embodiment is applied to user equipment, and includes:

a transmitting module 62, configured to transmit a sounding reference signal SRS to the base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot; under the condition that no time domain symbol occupied by the guard interval in the special subframe supports sending the SRS, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer, and N is more than or equal to 3 and less than or equal to 10.

Fig. 6 is a block diagram of an alternative structure of a measurement reference signal transmitting apparatus according to an embodiment of the present invention, as shown in fig. 6, optionally, the apparatus further includes: a first receiving module 60a, coupled to the transmitting module 62, configured to receive radio resource control RRC signaling, where the RRC signaling is used to indicate the number of time domain symbols occupied by a guard interval for transmitting an SRS in a special subframe or indicate the number of time domain symbols occupied by an uplink pilot timeslot to be added.

Fig. 7 is a block diagram of an alternative structure of a measurement reference signal transmitting apparatus according to an embodiment of the present invention, as shown in fig. 7, optionally, the apparatus further includes: a second receiving module 60b, coupled to the sending module 62, configured to receive a special subframe configuration, where the special subframe configuration is at least used to indicate the number of time domain symbols occupied by the uplink pilot timeslot in the special subframe.

Fig. 8 is a block diagram of an alternative structure of a measurement reference signal transmitting apparatus according to an embodiment of the present invention, as shown in fig. 8, optionally, the apparatus further includes: a third receiving module 60c, coupled to the sending module 62, configured to receive configuration information sent by the base station, where the configuration information includes at least one of: configuring SRS transmission period and subframe offset of user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; OCC indication information; and the sending module is used for sending the SRS to the base station according to the configuration information.

Optionally, the sending module 62 is configured to send the SRS to the base station according to predefined configuration information, where the predefined configuration information includes at least one of: configuring SRS transmission period and subframe offset of user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; the OCC indication information.

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

Optionally, the sending module 62 is configured to send, to the base station, the SRS on a subframe that satisfies the following relationship when the SRS transmission period is 2: (transmission subframe index of SRS-SRS subframe offset value) mod7 ═ 0, where mod is a modulo function.

Optionally, a value of N is one of: 3. 4, 5 and 6.

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 may be configured to store the software.

In order to make the description of the embodiments of the present invention clearer, the following description and illustrations are made with reference to alternative embodiments.

In the optional embodiment of the present invention, according to the predefined transmission criteria of both the base station and the terminal, the sounding reference signal is transmitted on the guard interval of the special subframe or the newly added UpPTS, so that the user multiplexing capacity of the SRS is increased. Therefore, the optional embodiment of the invention solves the problem of the reduction of the number of users when the SRS is transmitted by multiple antennas in the LTE-A system in the prior art, increases the number of the SRS resources available in the LTE-A system, and improves the number of users which can be accommodated in the LTE-A system.

Alternative embodiment 1

In an application scenario of this embodiment, in a Time Division Duplex (TDD) system, uplink-downlink configuration is set to 1 according to configuration information shown in table 1, a downlink subframe uses a conventional cyclic prefix, and an uplink subframe uses a conventional cyclic prefix.

For a terminal (marked as a legacy terminal) with a version of Rel-12 or before Rel-12, the base station may set the special subframe configuration according to table 2, assuming that configuration 6 is adopted, i.e., the number of time domain symbols occupied by the downlink pilot time slot, the guard interval, and the uplink pilot time slot is 9, 3, and 2.

For a terminal (marked as a new version terminal) with a version of Rel-13 or after Rel-13, adopting table 3 to set special subframe configuration, if the capacity requirement of the SRS is not large, setting one of configuration 0 to configuration 9, namely, the UpPTS is the configuration of 1 symbol or 2 symbols; if the capacity requirement of the SRS is larger, setting the configuration 10, and setting the UpPTS symbol number of the configuration 10 to be 4, thereby greatly enhancing the multiplexing capacity of the SRS. As shown in fig. 9, UpPTS2 is a newly added uplink pilot timeslot that can be used for sending SRS, and UpPTS is an original uplink pilot timeslot that can be used for sending SRS of a system before Rel-13.

For a new version of the terminal, if set to configuration 10, the length of UpPTS indicates 4 time domain symbols. The base station sends configuration information to the terminal through signaling, and the terminal sends a measurement reference signal to the base station according to the received configuration information or a predefined criterion, wherein the configuration information or the predefined criterion comprises: user-specific SRS period and subframe offset configuration, subframe index and uplink pilot time slot index and SRS transmission subframe index k_SRSThe corresponding relation between them.

Wherein, the configuration set of the SRS period and the subframe offset special for the user is shown in Table 4, and the subframe index, the uplink pilot frequency slot index and the SRS sending subframe index k_SRSThe correspondence between them is shown in table 5.

When the SRS period under the time division duplex system is 2, the sending subframe index k of the SRS_SRSIf it satisfies (k)_SRS-T_offset,1) mod7 is 0, the terminal transmits the SRS. Wherein T is_offset,1For SRS subframe biasing, mod is a modulo function.

TABLE 3 Special subframe configuration (DwPTS/GP/UpPTS length)

Table 4 TDD trigger type 1 user specific SRS period and subframe offset configuration

SRS configuration index ISRS	SRS period T_SRS,1(ms)	SRS subframe offset T _offset,1
			0	Reservation	Reservation
1	2	0,4
			2	2	0,5
3	2	0,6
			4	2	1,4
5	2	1,5
			6	2	1,6
7	2	2,4
			8	2	2,5
9	2	2,6
			10	2	3,4
11	2	3,5
			12	2	3,6
13	2	4,5
			14	2	4,6
15	2	5,6
			16–20	5	ISRS–16
21–30	10	ISRS–21
			31	Reservation	Reservation

TABLE 5K in TDD_SRS

Alternative embodiment two

For a new version of the terminal, if set to configuration 10, the length of UpPTS indicates 4 time domain symbols. The base station sends configuration information to the terminal through signaling, and the terminal sends a measurement reference signal to the base station according to the received configuration information or a predefined criterion, wherein the configuration information or the predefined criterion comprises: user specializationSRS period and subframe offset configuration, subframe index and uplink pilot time slot index, and SRS transmission subframe index k_SRSThe orthogonal mask OCC enable information and the orthogonal mask OCC indication information.

Wherein, the configuration set of the SRS period and the subframe offset special for the user is shown in Table 6, and the subframe index, the uplink pilot frequency slot index and the SRS transmission subframe index k_SRSThe correspondence between them is shown in table 7.

When the orthogonal mask OCC is enabled, it indicates that the terminal performs time domain OCC extension on the uplink pilot time slot of the 1 st symbol and the uplink pilot time slot of the 2 nd symbol, and performs time domain OCC extension on the uplink pilot time slot of the 3 rd symbol and the uplink pilot time slot of the 4 th symbol.

An orthogonal mask OCC indication information of "0" indicates that terminal usage [ +1, +1], and an orthogonal mask OCC indication information of "1" indicates that terminal usage [ +1, -1 ]; alternatively, an orthogonal mask OCC indication information of "0" indicates that terminal usage [ +1, -1] is indicated, and an orthogonal mask OCC indication information of "1" indicates that terminal usage [ +1, +1] is indicated;

when the SRS period under the time division duplex system is 2, the sending subframe index k of the SRS_SRSIf so:

(k_SRS-T_offset,1) mod5 is 0, the terminal transmits the SRS. Wherein T is_offset,1For SRS subframe biasing, mod is a modulo function.

Table 6 TDD trigger type 1 user specific SRS period and subframe offset configuration

SRS configuration index ISRS	SRS period T_SRS,1(ms)	SRS subframe offset T _offset,1
			0	Reservation	Reservation
1	2	0,2
			2	2	1,2
3	2	0,3
			4	2	1,3
5	2	0,4
			6	2	1,4
7	2	2,3
			8	2	2,4
9	2	3,4
			10–14	5	ISRS–10

15–24	10	ISRS–15
			25–31	Reservation	Reservation

TABLE 7K in TDD_SRS

Alternative embodiment three

An application scenario of this embodiment is that in a Time Division Duplex (TDD) system, a terminal sends a measurement reference signal to a base station on a time-frequency resource corresponding to a guard band in a special subframe of a radio frame, where the guard band is a guard band from a downlink to an uplink, and a guard band (GP) for sending an SRS is adjacent to an UpPTS symbol, as shown in fig. 10,

the base station sends configuration information to the terminal through signaling, and the terminal sends a measurement reference signal to the base station according to the received configuration information or a predefined criterion, wherein the configuration information or the predefined criterion comprises: user-specific SRS period and subframe offset configuration, subframe indexIndex of pilot time slot and SRS sending sub-frame index k_SRSThe corresponding relation between them.

TABLE 8K in TDD_SRS

TABLE 9K in TDD_SRS

Wherein, the configuration set of the SRS period and the subframe offset special for the user is shown in Table 4, and the subframe index, the uplink pilot frequency slot index and the SRS sending subframe index k_SRSThe correspondence between them is shown in table 8 or table 9.

For example, when the period of the SRS in the tdd system is 2 and the correspondence relationship shown in table 8 is used, the transmission subframe index k of the SRS is set to be_SRSIf so:

(k_SRS-T_offset,1) mod7 is 0, the terminal transmits the SRS. Wherein T is_offset,1For SRS subframe biasing, mod is a modulo function.

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

1. A SRS sending method is characterized by comprising the following steps:

the user equipment transmits a Sounding Reference Signal (SRS) to the base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval GP and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot;

under the condition that none of the time domain symbols occupied by the guard intervals in the special sub-frame support sending of the SRS, the number of the time domain symbols occupied by the uplink pilot time slot is N, wherein N is an integer and is more than or equal to 3 and less than or equal to 10;

the user equipment transmitting the SRS to the base station on the special subframe comprises:

the UE transmits the SRS to the base station according to predefined configuration information, wherein the predefined configuration information comprises at least one of the following: configuring SRS transmission period and subframe offset of the user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; OCC indication information;

the OCC indication information is used for:

under the condition that OCC is enabled and the number of time domain symbols occupied by the uplink pilot time slot of the special subframe is 4, performing time domain OCC expansion on the 1 st uplink pilot time slot time domain symbol and the 2 nd uplink pilot time slot time domain symbol according to the OCC indication information, and performing time domain OCC expansion on the 3 rd uplink pilot time slot time domain symbol and the 4 th uplink pilot time slot time domain symbol; alternatively, the first and second electrodes may be,

2. The method of claim 1, wherein before the user equipment transmits the SRS to the base station on the special subframe, the method further comprises:

the user equipment receives Radio Resource Control (RRC) signaling, wherein the RRC signaling is used for indicating the number of time domain symbols occupied by a guard interval for transmitting an SRS in the special subframe or indicating the number of time domain symbols occupied by an increased uplink pilot time slot.

3. The method of claim 1, wherein one or more of the time domain symbols occupied by the guard interval are adjacent to the time domain symbols occupied by the uplink pilot time slot.

4. The method of claim 1, wherein the number of time domain symbols occupied by the guard interval is greater than 3.

5. The method of claim 1, wherein before the user equipment transmits the SRS to the base station on the special subframe, the method further comprises:

the user equipment receives a special subframe configuration, wherein the special subframe configuration is at least used for indicating the number of time domain symbols occupied by the uplink pilot time slot in the special subframe.

6. The method of claim 1,

before the user equipment transmits the SRS to the base station in the special subframe, the method further includes: and the user equipment receives the configuration information sent by the base station.

7. The method of claim 1 or 6, wherein the SRS transmission periodicity and subframe offset configuration of the user equipment comprises at least one of:

8. The method of claim 1 or 6, wherein the correspondence among the subframe index, the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

9. The method according to claim 1 or 6, wherein the correspondence between the subframe index and the uplink pilot slot index and the transmission subframe index of SRS comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

10. The method of claim 1 or 6, wherein the corresponding relationship among the subframe index, the guard interval symbol index, the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

11. The method of claim 1 or 6, wherein the corresponding relationship among the subframe index, the guard interval symbol index, the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

12. The method of claim 1 or 6, wherein the OCC enabling information is used to indicate whether OCC is enabled.

13. The method of claim 1, wherein the OCC indication information comprises:

first OCC indication information for indicating that the user equipment uses [ +1, +1] as an orthogonal mask, and second OCC indication information for indicating that the user equipment uses [ +1, -1] as an orthogonal mask.

14. The method according to claim 1 or 6, wherein when the SRS transmission period is 2, the user equipment transmits the SRS to the base station on a subframe satisfying the following relation:

(transmission subframe index of SRS-SRS subframe offset value) mod7 ═ 0, where mod is a modulo function.

15. The method according to claim 1 or 6, wherein in case that none of the time domain symbols occupied by the guard interval in the special subframe support SRS transmission, the special subframe configuration comprises:

a special subframe configuration 10, where the special subframe configuration 10 is at least used to indicate that the number of time domain symbols occupied by an uplink pilot time slot in the special subframe is N, where N is an integer and N is greater than or equal to 3 and less than or equal to 10.

16. The method of claim 15, wherein N is one of: 3. 4, 5 and 6.

17. A SRS sending device applied to User Equipment (UE) is characterized by comprising:

a sending module, configured to send a Sounding Reference Signal (SRS) to a base station on at least one of the following special subframes: one or more time domain symbols in the time domain symbols occupied by the guard interval GP and one or more time domain symbols in the time domain symbols occupied by the uplink pilot time slot;

the transmitting module is further configured to transmit the SRS to the base station according to predefined configuration information, where the predefined configuration information includes at least one of: configuring SRS transmission period and subframe offset of the user equipment; configuring a special subframe; the corresponding relation among the subframe index, the uplink pilot frequency time slot index and the SRS sending subframe index; the corresponding relation of the subframe index, the guard interval symbol index, the uplink pilot frequency time slot index and the SRS sending subframe index; orthogonal mask OCC enable information; OCC indication information;

the OCC indication information is used for:

18. The apparatus of claim 17, further comprising:

a first receiving module, configured to receive a radio resource control RRC signaling, where the RRC signaling is used to indicate a number of time domain symbols occupied by a guard interval for transmitting an SRS in the special subframe or indicate a number of time domain symbols occupied by an uplink pilot timeslot to be increased.

19. The apparatus of claim 17, wherein one or more of the time domain symbols occupied by the guard interval are adjacent to the time domain symbols occupied by the uplink pilot time slot.

20. The apparatus of claim 17, wherein the guard interval occupies a number of time domain symbols greater than 3.

21. The apparatus of claim 17, further comprising:

a second receiving module, configured to receive a special subframe configuration, where the special subframe configuration is at least used to indicate the number of time domain symbols occupied by the uplink pilot timeslot in the special subframe.

22. The apparatus of claim 17,

the device further comprises: and the third receiving module is used for receiving the configuration information sent by the base station.

23. The apparatus according to claim 17 or 22, wherein the SRS transmission period and subframe offset configuration of the user equipment comprises at least one of:

24. The apparatus according to claim 17 or 22, wherein the correspondence among the subframe index, the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

25. The apparatus according to claim 17 or 22, wherein the correspondence between the subframe index and the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

26. The apparatus of claim 17 or 22, wherein the corresponding relationship among the subframe index, the guard interval symbol index, the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 4;

when the subframe index is 3, the subframe index for transmitting the SRS is 5;

when the subframe index is 4, the transmission subframe index of the SRS is 6;

when the subframe index is 7, the transmission subframe index of the SRS is 11;

when the subframe index is 8, the transmission subframe index of the SRS is 12;

when the subframe index is 9, the transmission subframe index of the SRS is 13.

27. The apparatus of claim 17 or 22, wherein the corresponding relationship among the subframe index, the guard interval symbol index, the uplink pilot slot index and the SRS transmission subframe index comprises at least one of:

when the subframe index is 2, the subframe index for transmitting the SRS is 2;

when the subframe index is 3, the subframe index for transmitting the SRS is 3;

when the subframe index is 4, the subframe index for transmitting the SRS is 4;

when the subframe index is 7, the transmission subframe index of the SRS is 7;

when the subframe index is 8, the transmission subframe index of the SRS is 8;

when the subframe index is 9, the transmission subframe index of the SRS is 9.

28. The apparatus of claim 17 or 22, wherein the OCC enabling information is used to indicate whether OCC is enabled.

29. The apparatus of claim 17, wherein the OCC indication information comprises:

30. The apparatus of claim 17 or 22, wherein the transmitting module is configured to transmit the SRS to the base station on a subframe satisfying a following relationship when an SRS transmission period is 2:

31. The apparatus of claim 17 or 22, wherein in case that none of the time domain symbols occupied by the guard interval in the special subframe support SRS transmission, the special subframe configuration comprises:

32. The apparatus of claim 31, wherein N is one of: 3. 4, 5 and 6.