CN105991264B - A kind of sending method of measuring reference signals, equipment and system - Google Patents

A kind of sending method of measuring reference signals, equipment and system Download PDF

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Publication number
CN105991264B
CN105991264B CN201510057156.8A CN201510057156A CN105991264B CN 105991264 B CN105991264 B CN 105991264B CN 201510057156 A CN201510057156 A CN 201510057156A CN 105991264 B CN105991264 B CN 105991264B
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srs
base station
control signaling
downlink control
terminal equipment
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CN105991264A (en
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王瑜新
李劲菊
陈艺戬
鲁照华
李儒岳
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2016/070083 priority patent/WO2016124060A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses the sending methods of measuring reference signals (SRS) a kind of, this method comprises: the configuration information of SRS is arranged in base station, and the configuration information of the SRS are issued to terminal device；The configuration information includes: the precoding enable instruction for being used to indicate the terminal device and whether carrying out precoding to the SRS；Wherein, the precoding enable instruction includes: the transmission block quantity or antenna port of downlink transfer mode or descending control signaling format or terminal device, the joint instructions information of scrambling code ID and the number of plies.The present invention further simultaneously discloses the equipment and system for realizing the method.

Description

Method, equipment and system for sending measurement reference signal
Technical Field
The present invention relates to a transmission technology of a Sounding Reference Signal (SRS) in the communication field, and in particular, to a method, a device and a system for sending an SRS.
Background
The SRS is a signal used between the terminal device and the base station to measure 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 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 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 triggering through trigger type 0) or downlink control information (also referred to as triggering through trigger type 1), where the triggering is based on the higher layer signaling and the triggering is based on the downlink control information, and the triggering is based on the higher layer signaling and the non-periodic SRS. Although the LTE-A Release 10 is added with the mode of non-periodically sending the SRS, the utilization rate of the SRS resource is improved to a certain extent, and the flexibility of resource scheduling is improved.
However, in the future LTE-a Release 13(LTE-a Release 13) research, in order to reduce the resource overhead of downlink pilot and reduce the feedback amount of UE, a Full-Dimension MIMO (Full Dimension-MIMO) or/and Massive-antenna MIMO (Massive-MIMO) system often uses channel reciprocity to obtain downlink CSI by measuring SRS, so that higher requirements are put forward on the multiplexing capacity of SRS and the accuracy of channel estimation measurement. How to further save the SRS resource, improve the SRS resource utilization rate, improve the SRS channel estimation performance, and reduce the SRS interference to the neighboring cells, so as to realize more effective support of FD-MIMO/Massive-MIMO system application, is a problem to be solved urgently. There is no effective solution to the above problems in the related art at present.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a method, a device, and a system for sending a sounding reference signal.
The embodiment of the invention provides a method for sending a measurement reference signal (SRS), which comprises the following steps:
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: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
The embodiment of the invention also provides a sending method of the SRS, which comprises the following steps:
the terminal equipment receives SRS configuration information issued by a base station, and sends a precoded SRS or an SRS which is not precoded according to the SRS configuration information;
the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
An embodiment of the present invention further provides a base station, where the base station includes: the device comprises a setting module and a sending module; wherein,
the setting module is used for setting the configuration information of the SRS and forwarding the configuration information to the sending module;
the sending module is used for sending the configuration information of the SRS to the terminal equipment;
wherein the configuration information comprises: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
An embodiment of the present invention further provides a terminal device, where the terminal device includes: the device comprises a receiving module and a processing and sending module; wherein,
the receiving module is used for receiving the configuration information of the SRS issued by the base station and forwarding the configuration information to the processing and sending module;
the processing and transmitting module is used for transmitting a precoded SRS or an SRS which is not precoded according to the SRS configuration information;
the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
An embodiment of the present invention further provides a system for sending an SRS, where the system includes: the base station and the terminal device described above.
According to the sending method, the equipment and the system of the measurement reference signal provided by the embodiment of the invention, the base station sets the configuration information of the SRS and sends the configuration information of the SRS to the terminal equipment; the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not; wherein the precoding enabling indication information includes: downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number. The embodiment of the invention can realize that the user terminal sends the precoded SRS, and the precoding enabling control of the SRS is bound with the transmission mode or the downlink control signaling format or the number of transmission blocks or the combined indication information of the scrambling ID and the number of layers of the antenna port, thereby solving the problem of the precoding enabling control of the SRS, saving the expense of downlink signaling, realizing more effective SRS precoding sending, saving SRS multiplexing resources, reducing the interference of the SRS to the adjacent region, and further achieving the effect of improving the overall performance of the system.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.
Fig. 1 is a schematic diagram of a comb structure of SRS in the related art;
fig. 2 is a flowchart illustrating an implementation of a method for sending a sounding reference signal according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an implementation of a method for sending a sounding reference signal according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 6 is a schematic configuration diagram of configuration information sent by the base station to the terminal device according to the second embodiment of the present invention.
Detailed Description
As can be known from the related art, the uplink Physical Channel of the Long Term Evolution (LTE) system includes a Physical Random Access Channel (PRACH), a Physical uplink shared Channel (PUS CH), and a Physical Uplink Control Channel (PUCCH).
In LTE, a Physical Downlink Control Channel (PDCCH) is used to carry uplink and downlink scheduling information and uplink power control information. A base station (e-Node-B, abbreviated as eNB) may configure a User equipment (User equipment, abbreviated as UE) through downlink control information, or the terminal equipment receives configuration of higher layers (highers), which is also called to configure the UE through higher layer signaling. The format (format) of the Downlink Control Information (DCI) is divided into DCI formats 0, 1A, 1B, 1C, 1D, 2A, 2B, 3A, and the like. Wherein,
the DCI format 0 is used to indicate scheduling of a Physical Uplink Shared Channel (PUSCH);
the DCI format 1, 1A, 1B, 1C, 1D is used for different transmission modes of a Physical Downlink Shared Channel (PDSCH) of a single transport block;
the DCI format 2, 2A, 2B is used for different transmission modes of downlink PDSCH space division multiplexing;
the DCI format 3, 3A is used for transmission of a Physical Uplink Control Channel (PUCCH) and a power control command of a PUSCH.
The transport block sizes of the DCI formats 0, 1A, 3, and 3A are the same, where 1 bit is used for format differentiation in the DCI formats 0 and 1A.
In the LTE system, the SRS sequence transmitted by the UE is a root sequenceAnd performing cyclic shift alpha in a time domain. Different SRS sequences can be obtained by performing different cyclic shifts alpha on the same root sequence, and the obtained SRS sequences are mutually orthogonal, so that the SR S sequences can be allocated to different UEs for use, thereby realizing the code division multiple access among the UEs.
In addition, within the same SRS bandwidth, subcarriers (sub-carriers) of the SRS are spaced apart, that is, the SRS is transmitted in a comb structure, the number of frequency combs (frequency combs) in the LTE system is 2, and a RePetition Factor (RPF) corresponding to a time domain is 2. Fig. 1 is a schematic diagram of a Comb structure of SRS in the related art, and as shown in fig. 1, when each UE transmits an SR S, only one of two frequency combs is used, Comb is 0 or Comb is 1. In this way, according to the frequency Comb position indication of 1-bit upper layer signaling, the UE transmits the SRS only using subcarriers with even or odd frequency domain indexes. This comb structure allows more UEs to transmit SRS within the same SRS bandwidth.
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 uplink single-user Multiple-Input Multiple-Output (SU-MI MO) is not supported in the LTE system, the UE can only have one antenna to transmit the SRS at each time, and thus only one SRS resource is needed for one UE, 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. On the basis of an original LTE format, a format 4 is added to a downlink control information format for uplink MIMO transmission, a format 2C is used for MIMO transmission of a downlink 8 antenna, and a format 2D is used for transmission of a downlink Coordinated Multi-point (CoMP for short) system.
In the embodiment of the invention, a base station sets configuration information of an SRS and transmits the configuration information of the SRS to terminal equipment; the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not; wherein the precoding enabling indication information includes: downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
The invention is described in further detail below with reference to the figures and the embodiments.
Fig. 2 is a flowchart of an implementation of a method for sending an SRS according to an embodiment of the present invention, and as shown in fig. 2, the method includes:
step 201: the base station sets SRS configuration information, wherein the configuration information comprises: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
step 202: the base station transmits the configuration information of the SRS to the terminal equipment;
wherein the precoding enabling indication information includes: downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
The embodiment of the invention can realize that the user terminal sends the precoded SRS, and the precoding enabling control of the SRS is bound with the transmission mode or the downlink control signaling format or the number of transmission blocks or the combined indication information of the scrambling ID and the number of layers of the antenna port, thereby solving the problem of the precoding enabling control of the SRS, saving the expense of downlink signaling, realizing more effective SRS precoding sending, saving SRS multiplexing resources, reducing the interference of the SRS to the adjacent region, and further achieving the effect of improving the overall performance of the system.
In this embodiment of the present invention, when the precoding enabling indication information includes a downlink transmission mode, the setting, by the base station, of the SRS configuration information includes:
when the base station configures the terminal equipment to be in a downlink transmission mode, setting the SRS sent by the terminal equipment as a precoded SRS; when the base station configures the terminal equipment to be in an uplink transmission mode, setting the SRS sent by the terminal equipment as a non-precoded SRS;
or, when the base station configures the terminal device to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, setting the SRS sent by the terminal device to be the precoded SRS; when the base station configures the terminal device to be a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, setting the SRS transmitted by the terminal device to be a non-precoded SRS.
In this embodiment of the present invention, when the precoding enabling indication information includes a downlink control signaling format, the setting, by the base station, of the SRS configuration information includes:
when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, the base station sets the SRS sent by the terminal equipment as the precoded SRS; when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 0, or in the downlink control signaling format 4, or in the downlink control signaling format 1A, the base station sets the SRS sent by the terminal equipment as a non-precoded SRS;
or, when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, or in the downlink control signaling format 1A, the base station configures the SRS transmitted by the terminal device as the precoded SRS; when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 0 or the downlink control signaling format 4, the base station sets the SRS sent by the terminal equipment as a non-precoded SRS.
In this embodiment of the present invention, when the precoding enabling indication information includes the number of transport blocks of the terminal device, the setting, by the base station, of the SRS configuration information includes:
when the base station configures the number of the uplink/downlink transmission blocks to be 1 or only one uplink/downlink transmission block is enabled to the terminal equipment, setting the SRS sent by the terminal equipment as a precoded SRS; and when the base station configures the number of the uplink/downlink transmission blocks to be 2 or both the uplink/downlink transmission blocks are enabled to the terminal equipment, setting the SRS sent by the terminal equipment as a non-precoded SRS.
In this embodiment of the present invention, the precoding enabling indication information includes: when the antenna port, the scrambling code ID and the combined indication information of the number of layers are used, the base station sets the configuration information of the SRS, which includes:
when the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 0 or 1, setting the SRS sent by the terminal equipment as a precoded SRS;
when the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 1 or 0, the SRS sent by the terminal equipment is set to be a non-precoded SRS.
In one embodiment, the precoding enabling indication information further includes: information indicating a periodicity of the precoded SRS and a subframe offset.
In the embodiment of the present invention, the setting, by the base station, the SRS configuration information further includes:
and the base station sets the period of the precoded SRS and the information of subframe offset for the terminal equipment through high-level RRC signaling.
In one embodiment, the precoding enabling indication information further includes: indication information of a precoding matrix index.
In this embodiment of the present invention, the precoding enabling indication information includes: when indicating information of a precoding matrix index, the base station sets configuration information of an SRS, including:
when a precoding matrix indicated by a precoding matrix index configured to the terminal equipment by the base station is a unit matrix, setting the terminal equipment to send a non-precoded SRS;
and when the precoding matrix indicated by the precoding matrix index configured to the terminal equipment by the base station is a non-unit matrix, setting the terminal equipment to send the precoded SRS.
An embodiment of the present invention further provides a method for sending a sounding reference signal SRS, as shown in fig. 3, where the method includes:
step 301: the method comprises the following steps that terminal equipment receives configuration information of an SRS issued by a base station, wherein the configuration information comprises: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
step 302: the terminal equipment sends a precoded SRS or an SRS which is not precoded according to the SRS configuration information;
the precoding enabling indication information includes: downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
The embodiment of the invention can realize that the user terminal sends the precoded SRS, and the precoding enabling control of the SRS is bound with the transmission mode or the downlink control signaling format or the number of transmission blocks or the combined indication information of the scrambling ID and the number of layers of the antenna port, thereby solving the problem of the precoding enabling control of the SRS, saving the expense of downlink signaling, realizing more effective SRS precoding sending, saving SRS multiplexing resources, reducing the interference of the SRS to the adjacent region, and further achieving the effect of improving the overall performance of the system.
In the embodiment of the present invention, the sending, by the terminal device, the precoded SRS or the non-precoded SRS according to the SRS configuration information includes:
when precoding enabling indication information in the SRS configuration information indicates enabling, the terminal equipment precodes the SRS to be transmitted and transmits the precoded SRS to the base station;
and when precoding enabling indication information in the SRS configuration information indicates that the SRS is not enabled, the terminal equipment transmits the non-precoded SRS to the base station.
In the embodiment of the present invention, when the precoding enabling indication information includes a downlink transmission mode,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the terminal equipment determines that the terminal equipment is configured to be in a downlink transmission mode, sending a precoded SRS; when determining that the SRS is configured as an uplink transmission mode, transmitting a non-precoded SRS;
or when the terminal device determines that the terminal device is configured as a downlink transmission mode 8, a downlink transmission mode 9, a downlink transmission mode 10 or a downlink transmission mode 11, the terminal device sends the precoded SRS; and when determining that the transmission mode is configured to be other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10 and the downlink transmission mode 11, transmitting the non-precoded SRS.
In the embodiment of the invention, when the precoding enabling indication information comprises a downlink control signaling format,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the terminal equipment receives a downlink control signaling which is sent by a base station and triggers sending of an SRS (sounding reference signal) in a downlink control signaling format 2B, a downlink control signaling format 2C or a downlink control signaling format 2D, the terminal equipment sends the precoded SRS; when receiving a downlink control signaling which is sent by a base station and triggers sending of an SRS (sounding reference signal) in a downlink control signaling format 0, a downlink control signaling format 4 or a downlink control signaling format 1A, sending a non-precoded SRS;
or, when receiving a downlink control signaling format 2B, or a downlink control signaling format 2C, or a downlink control signaling format 2D, or a downlink control signaling format 1A, which is sent by a base station and triggers sending of an SRS, the terminal device sends the precoded SRS; and when receiving a downlink control signaling which is sent by the base station and triggers sending of the SRS in a downlink control signaling format 0 or a downlink control signaling format 4, sending the non-precoded SRS.
In the embodiment of the invention, when the precoding enabling indication information comprises the number of the transmission blocks of the terminal equipment,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the number of uplink/downlink transmission blocks of the terminal equipment configured by a base station is 1 or only one uplink/downlink transmission block is enabled, the terminal equipment sends a precoded SRS; and when the number of uplink/downlink transmission blocks of the terminal equipment configured by the base station is 2 or both the uplink/downlink transmission blocks are enabled, the terminal equipment sends a non-precoded SRS.
In the embodiment of the present invention, when the precoding enabling indication information includes the joint indication information of the antenna port, the scrambling code ID and the number of layers,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the high 1 bit value of the combined indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling received by the terminal equipment is 0 or 1, sending a precoded SRS; and when the value of the high 1 bit of the combined indication information of the antenna port, the scrambling code ID and the layer number in the received downlink control signaling is 1 or 0, sending the non-precoded SRS.
In one embodiment, the precoding enabling indication information further includes: information indicating a periodicity of the precoded SRS and a subframe offset.
In this embodiment of the present invention, the sending, by the terminal device, the precoded SRS or the non-precoded SRS according to the configuration information includes:
when the terminal equipment determines that the subframe index of the subframe for sending the SRS, which is set by the base station, meets the relation between the indication precoded SRS period and the subframe offset, the terminal equipment sends the precoded SRS; otherwise, a non-precoded SRS is transmitted.
In one embodiment, the precoding enabling indication information further includes: indication information of a precoding matrix index.
In the embodiment of the invention, when the precoding enabling indication information comprises indication information of a precoding matrix index,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when a precoding matrix indicated by a precoding matrix index configured to a terminal device by a base station is a unit matrix, the terminal device sends a non-precoded SRS;
when a precoding matrix indicated by a precoding matrix index configured to the terminal equipment by the base station is a non-unitary matrix, the terminal equipment sends the precoded SRS.
An embodiment of the present invention further provides a base station, and as shown in fig. 4, the base station 40 includes: a setting module 401 and a sending module 402; wherein,
the setting module 401 is configured to set configuration information of an SRS, and forward the configuration information to the sending module;
the sending module 402 is configured to issue the configuration information of the SRS to a terminal device;
wherein the configuration information comprises: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
The embodiment of the invention can realize that the user terminal sends the precoded SRS, and the precoding enabling control of the SRS is bound with the transmission mode or the downlink control signaling format or the number of transmission blocks or the combined indication information of the scrambling ID and the number of layers of the antenna port, thereby solving the problem of the precoding enabling control of the SRS, saving the expense of downlink signaling, realizing more effective SRS precoding sending, saving SRS multiplexing resources, reducing the interference of the SRS to the adjacent region, and further achieving the effect of improving the overall performance of the system.
In the embodiment of the present invention, when the precoding enabling indication information includes a downlink transmission mode,
when the base station configures the terminal device in a downlink transmission mode, the setting module 401 is configured to set the SRS sent by the terminal device to be a precoded SRS; when the base station configures the terminal device in an uplink transmission mode, the setting module 401 is configured to set the SRS sent by the terminal device to be a non-precoded SRS;
or, when the base station configures the terminal device to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the setting module 401 is configured to set the SRS sent by the terminal device to be the precoded SRS; when the base station configures the terminal device as a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the setting module 401 is configured to set the SRS sent by the terminal device as a non-precoded SRS.
In the embodiment of the invention, when the precoding enabling indication information comprises a downlink control signaling format,
when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, the setting module 401 is configured to set the SRS transmitted by the terminal device to be the precoded SRS; when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in downlink control signaling format 0, or downlink control signaling format 4, or downlink control signaling format 1A, the setting module 401 is configured to set the SRS transmitted by the terminal device to be a non-precoded SRS;
or, when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or the downlink control signaling format 2C, or the downlink control signaling format 2D, or the downlink control signaling format 1A, the setting module 401 is configured to configure the SRS transmitted by the terminal device as the precoded SRS; when the base station triggers the terminal device to transmit the SRS using the downlink control signaling in the downlink control signaling format 0 or the downlink control signaling format 4, the setting module 401 is configured to set the SRS transmitted by the terminal device to be a non-precoded SRS.
In the embodiment of the invention, when the precoding enabling indication information comprises the number of the transmission blocks of the terminal equipment,
when the base station configures 1 uplink/downlink transport block number or only one uplink/downlink transport block enable to the terminal device, the setting module 401 is configured to set the SRS sent by the terminal device to be a precoded SRS; when the base station configures the terminal device with the number of uplink/downlink transport blocks of 2, or both uplink/downlink transport blocks are enabled, the setting module 401 is configured to set the SRS sent by the terminal device to be a non-precoded SRS.
In this embodiment of the present invention, the precoding enabling indication information includes: when the antenna port, the scrambling code ID and the joint indication information of the layer number,
the setting module 401 is configured to set an SRS sent by the terminal device as a precoded SRS, when a value of a high 1 bit of joint indication information of an antenna port, a scrambling ID, and a layer number in a downlink control signaling configured by the base station to the terminal device is 0 or 1;
the setting module 401 is configured to set the SRS sent by the terminal device to be a non-precoded SRS when a value of a high 1 bit of the joint indication information of the antenna port, the scrambling ID, and the number of layers in the downlink control signaling configured by the base station to the terminal device is 1 or 0.
In one embodiment, the precoding enabling indication information further includes: information indicating a periodicity of the precoded SRS and a subframe offset.
In this embodiment of the present invention, the setting module 401 is further configured to set the period of the precoded SRS and the subframe offset information for the terminal device through a high-level RRC signaling.
In one embodiment, the precoding enabling indication information further includes: indication information of a precoding matrix index.
In this embodiment of the present invention, the precoding enabling indication information includes: when the indication information of the precoding matrix index is,
when the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a unit matrix, the setting module 401 is configured to set the terminal device to transmit a non-precoded SRS;
the setting module 401 is configured to set the terminal device to send the precoded SRS when the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal device is a non-unitary matrix.
An embodiment of the present invention further provides a terminal device, and as shown in fig. 5, the terminal device 50 includes: a receiving module 501 and a processing and sending module 502; wherein,
the receiving module 501 is configured to receive the configuration information of the SRS sent by the base station, and forward the configuration information to the processing and sending module;
the processing and transmitting module 502 is configured to transmit a precoded SRS or an non-precoded SRS according to the SRS configuration information;
the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
The embodiment of the invention can realize that the user terminal sends the precoded SRS, and the precoding enabling control of the SRS is bound with the transmission mode or the downlink control signaling format or the number of transmission blocks or the combined indication information of the scrambling ID and the number of layers of the antenna port, thereby solving the problem of the precoding enabling control of the SRS, saving the expense of downlink signaling, realizing more effective SRS precoding sending, saving SRS multiplexing resources, reducing the interference of the SRS to the adjacent region, and further achieving the effect of improving the overall performance of the system.
In the embodiment of the present invention, the first and second substrates,
the processing and transmitting module 502 is configured to precode the SRS to be transmitted when it is determined that precoding enabling indication information in the SRS configuration information indicates enabling, and transmit the precoded SRS to the base station;
and when determining that the precoding enabling indication information in the SRS configuration information indicates that the SRS is not enabled, transmitting the non-precoded SRS to the base station.
In the embodiment of the present invention, when the precoding enabling indication information includes a downlink transmission mode,
the processing and transmitting module 502 is configured to transmit a precoded SRS when it is determined that the terminal device is configured in a downlink transmission mode; when the terminal equipment is configured to be in an uplink transmission mode, sending a non-precoded SRS;
or, when determining that the terminal device is configured as a downlink transmission mode 8, or a downlink transmission mode 9, or a downlink transmission mode 10, or a downlink transmission mode 11, sending the precoded SRS; and when determining that the terminal equipment is configured to be in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10 and the downlink transmission mode 11, transmitting a non-precoded SRS.
In the embodiment of the invention, when the precoding enabling indication information comprises a downlink control signaling format,
the processing and transmitting module 502 is configured to, when receiving a downlink control signaling that triggers sending of an SRS and is sent by a base station, send a precoded SRS, where the downlink control signaling is in a downlink control signaling format 2B, a downlink control signaling format 2C, or a downlink control signaling format 2D; when the terminal equipment receives a downlink control signaling which is sent by a base station and triggers sending of an SRS (sounding reference signal) in a downlink control signaling format 0, a downlink control signaling format 4 or a downlink control signaling format 1A, the terminal equipment sends a non-precoded SRS;
or, the terminal device sends the precoded SRS when receiving a downlink control signaling format 2B, a downlink control signaling format 2C, a downlink control signaling format 2D, or a downlink control signaling format 1A sent by the base station to trigger sending the SRS; and when the terminal equipment receives a downlink control signaling which is sent by the base station and triggers sending of the SRS in a downlink control signaling format 0 or a downlink control signaling format 4, the terminal equipment sends the non-precoded SRS.
In the embodiment of the invention, when the precoding enabling indication information comprises the number of the transmission blocks of the terminal equipment,
the processing and transmitting module 502 is configured to transmit a precoded SRS when the number of uplink/downlink transmission blocks of the terminal device configured by the base station is determined to be 1 or only one uplink/downlink transmission block is enabled; and when the number of the uplink/downlink transmission blocks of the terminal equipment configured by the base station is determined to be 2 or both the uplink/downlink transmission blocks are enabled, sending the non-precoded SRS.
In the embodiment of the present invention, when the precoding enabling indication information includes the joint indication information of the antenna port, the scrambling code ID and the number of layers,
the processing and transmitting module 502 is configured to transmit a precoded SRS when a high-1 bit value of the joint indication information of the antenna port, the scrambling code ID, and the number of layers in the downlink control signaling received by the terminal device is 0 or 1; and when the high 1 bit value of the combined indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling received by the terminal equipment is 1 or 0, sending the non-precoded SRS.
In one embodiment, the precoding enabling indication information further includes: information indicating a periodicity of the precoded SRS and a subframe offset.
In this embodiment of the present invention, the processing and transmitting module 502 is further configured to transmit the precoded SRS when it is determined that the subframe index of the SRS-transmitting subframe set by the base station satisfies the relationship between the indication-precoded SRS period and the subframe offset; otherwise, a non-precoded SRS is transmitted.
In one embodiment, the precoding enabling indication information further includes: indication information of a precoding matrix index.
In the embodiment of the invention, when the precoding enabling indication information comprises indication information of a precoding matrix index,
the processing and transmitting module 502 is configured to transmit a non-precoded SRS when it is determined that a precoding matrix indicated by a precoding matrix index configured by a base station to a terminal device is a unit matrix; and when the precoding matrix indicated by the precoding matrix index configured to the terminal equipment by the base station is determined to be a non-unit matrix, sending the precoded SRS.
The embodiment of the invention also provides a sending system of the SRS, which comprises: the base station 40 and the terminal device 50 described above.
The invention is described below with reference to several different scenario embodiments.
Example one
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enable indication information for indicating whether to precode the SRS; wherein, the downlink transmission mode is related to the precoding enabling indication information, that is: the precoding enabling indication information comprises a downlink transmission mode.
When the base station configures the terminal equipment to be in a downlink transmission mode, setting the SRS sent by the terminal equipment as a precoded SRS; when the base station configures the terminal equipment to be in an uplink transmission mode, setting the SRS sent by the terminal equipment as a non-precoded SRS;
or, when the base station configures the terminal device to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, setting the SRS sent by the terminal device to be the precoded SRS; when the base station configures the terminal equipment to be a transmission mode except the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10 and the downlink transmission mode 11, setting the SRS sent by the terminal equipment to be a non-precoded SRS;
if Precoding is to be performed, Precoding is performed according to Precoding information (PMI for short) carried in the downlink control signaling; or precoding according to the precoding information of the last transmission or the latest corresponding downlink control signaling; or precoding according to precoding information in the configuration information; or the UE obtains a downlink channel by measuring a reference signal (CSI-RS) used for channel state information and/or a cell-specific reference signal (CRS) in the downlink reference signal, predicts the uplink channel through channel reciprocity, performs singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix and a diagonal matrix, and selects a column vector corresponding to the largest singular value from the right singular matrix as a precoding matrix to precode the SRS.
The downlink control signaling in this embodiment is format 4, format 2B, format 2C, format 2D, or format 2E.
When the precoding enabling indication information indicates enabling, the user terminal precodes the SRS to be transmitted and transmits the precoded SRS to the base station; and when the precoding enabling indication information indicates that the precoding is not enabled, transmitting the SRS which is not precoded to the base station.
Example two
The sending method of the sounding reference signal provided in this embodiment is implemented by a system including a base station and a user equipment. Wherein,
the base station is used for triggering the user terminal to send the measurement reference signal and sending the configuration information of the measurement reference signal to the user terminal;
the configuration information includes one or more of the following indication information: precoding enabling indication information of the measurement reference signal, precoding information of the measurement reference signal.
And the user terminal is used for sending the measurement reference signal to the base station according to the obtained configuration information.
In this embodiment, the base station may configure the configuration information for sending the sounding reference signal to the user equipment according to the manner shown in fig. 6:
for the aperiodic SRS, the precoding is not needed;
for the periodic SRS, the base station configures the SRS period special for the user terminal and the period of the pre-coded SRS for the user terminal through high-level RRC signaling, wherein the period of the pre-coded SRS is integral multiple of the SRS period special for the user terminal. On the subframe of the periodic SRS, when the subframe index satisfies the relationship between the precoded SRS period and the subframe offset, for example: satisfies (10. n)f+kSRS-Toffset)modTSRSWhen the relation is 0, the precoded SRS is transmitted, otherwise, the SRS which is not precoded is transmitted. Wherein n isfNumbering system frames, kSRSFor sub-frame indices, T, within a frameoffsetFor subframe offset, TSRSIs the period of the precoded SRS. The base station can configure the period of the precoded SRS and the value of the subframe offset according to the factors such as the scene where the user terminal is located, the channel condition, the moving speed and the like.
In this embodiment, the precoding enabling indication information of the sounding reference signal is used to indicate whether the sounding reference signal is to be precoded.
In this embodiment, if precoding is to be performed, precoding is performed according to precoding information carried in the downlink control signaling; or precoding according to the precoding information of the last transmission or the latest corresponding downlink control signaling; or precoding according to precoding information in the configuration information; or the UE obtains a downlink channel by measuring a reference signal (CSI-RS) used for channel state information and/or a cell-specific reference signal (CRS) in the downlink reference signal, predicts the uplink channel through channel reciprocity, performs singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix and a diagonal matrix, and selects a column vector corresponding to the largest singular value from the right singular matrix as a precoding matrix to precode the SRS.
In this embodiment, the downlink control signaling may also be format 4, format 2B, format 2C, format 2D, or format 2E.
EXAMPLE III
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enabling indication information for indicating whether the terminal device precodes the SRS or not, wherein the precoding enabling indication information comprises: and the base station sets the information of the period and the subframe offset of the precoded SRS for the terminal equipment through high-level RRC signaling.
Transmission set at base stationOn the subframe of SRS, when the subframe index satisfies the relationship between the precoded SRS period and the subframe offset, for example: satisfies (10. n)f+kSRS-Toffset)modTSRSA relationship of 0, or satisfies (k)SRS-Toffset,1) mod5 is 0, the terminal device sends a precoded SRS; otherwise, the non-precoded SRS is transmitted.
Wherein n isfNumbering system frames, kSRSFor sub-frame indices, T, within a frameoffsetFor subframe offset, TSRSIs the period of the precoded SRS. The base station can configure the period of the precoded SRS and the value of the subframe offset according to the factors such as the scene where the user terminal is located, the channel condition, the moving speed and the like.
For FDD and TDD systems, the precoded SRS period and subframe offset configuration may refer to tables 1 and 2.
TABLE 1 user terminal specific precoded SRS periodicity and subframe offset configuration (FDD system)
TABLE 2 user terminal specific precoded SRS periodicity and subframe offset configuration (TDD system)
Example four
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enable indication information for indicating whether to precode the SRS; wherein, the downlink control signaling format is related to the precoding enabling indication information, that is: the precoding enabling indication information comprises a downlink control signaling format.
When the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, the base station sets the SRS sent by the terminal equipment as the precoded SRS; when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 0, or in the downlink control signaling format 4, or in the downlink control signaling format 1A, the base station sets the SRS sent by the terminal equipment as a non-precoded SRS;
or, when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, or in the downlink control signaling format 1A, the base station configures the SRS transmitted by the terminal device as the precoded SRS; when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 0 or the downlink control signaling format 4, the base station sets the SRS sent by the terminal equipment as a non-precoded SRS;
if Precoding is to be performed, Precoding is performed according to Precoding information (PMI for short) carried in the downlink control signaling; or precoding according to the precoding information of the last transmission or the latest corresponding downlink control signaling; or precoding according to precoding information in the configuration information; or the UE obtains a downlink channel by measuring a reference signal (CSI-RS) used for channel state information and/or a cell-specific reference signal (CRS) in the downlink reference signal, predicts the uplink channel through channel reciprocity, performs singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix and a diagonal matrix, and selects a column vector corresponding to the largest singular value from the right singular matrix as a precoding matrix to precode the SRS.
The downlink control signaling in this embodiment is format 4, format 2B, format 2C, format 2D, or format 2E.
When the precoding enabling indication information indicates enabling, the user terminal precodes the SRS to be transmitted and transmits the precoded SRS to the base station; and when the precoding enabling indication information indicates that the precoding is not enabled, transmitting the SRS which is not precoded to the base station.
EXAMPLE five
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enable indication information for indicating whether to precode the SRS; wherein, the number of transmission blocks is related to precoding enabling indication information, namely: the precoding enabling indication information comprises the number of transmission blocks of the terminal equipment.
When the base station configures the number of the uplink/downlink transmission blocks to be 1 or only one uplink/downlink transmission block is enabled to the terminal equipment, setting the SRS sent by the terminal equipment as a precoded SRS; when the base station configures 2 uplink/downlink transmission blocks or both the uplink/downlink transmission blocks to the terminal equipment, setting the SRS sent by the terminal equipment as a non-precoded SRS;
if Precoding is to be performed, Precoding is performed according to Precoding information (PMI for short) carried in the downlink control signaling; or precoding according to the precoding information of the last transmission or the latest corresponding downlink control signaling; or precoding according to precoding information in the configuration information; or the UE obtains a downlink channel by measuring a reference signal (CSI-RS) used for channel state information and/or a cell-specific reference signal (CRS) in the downlink reference signal, predicts the uplink channel through channel reciprocity, performs singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix and a diagonal matrix, and selects a column vector corresponding to the largest singular value from the right singular matrix as a precoding matrix to precode the SRS.
The downlink control signaling in this embodiment is format 4, format 2B, format 2C, format 2D, or format 2E.
When the precoding enabling indication information indicates enabling, the user terminal precodes the SRS to be transmitted and transmits the precoded SRS to the base station; and when the precoding enabling indication information indicates that the precoding is not enabled, transmitting the SRS which is not precoded to the base station.
EXAMPLE six
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enable indication information for indicating whether to precode the SRS; wherein, the joint indication information of the antenna port, the scrambling code ID (identity) and the number of layers of the user is related to the precoding enabling indication information, that is: the precoding enabling indication information includes: antenna port, scrambling code ID, and layer number joint indication information.
When the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 0 or 1, setting the SRS sent by the terminal equipment as a precoded SRS; when the value of the high 1 bit of the combined indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 1 or 0, setting the SRS sent by the terminal equipment as a non-precoded SRS;
if Precoding is to be performed, Precoding is performed according to Precoding information (PMI for short) carried in the downlink control signaling; or precoding according to the precoding information of the last transmission or the latest corresponding downlink control signaling; or precoding according to precoding information in the configuration information; or the UE obtains a downlink channel by measuring a reference signal (CSI-RS) used for channel state information and/or a cell-specific reference signal (CRS) in the downlink reference signal, predicts the uplink channel through channel reciprocity, performs singular value decomposition on the uplink channel to obtain a left singular matrix, a right singular matrix and a diagonal matrix, and selects a column vector corresponding to the largest singular value from the right singular matrix as a precoding matrix to precode the SRS.
The downlink control signaling in this embodiment is format 4, format 2B, format 2C, format 2D, or format 2E.
When the precoding enabling indication information indicates enabling, the user terminal precodes the SRS to be transmitted and transmits the precoded SRS to the base station; and when the precoding enabling indication information indicates that the precoding is not enabled, transmitting the SRS which is not precoded to the base station.
EXAMPLE seven
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enable indication information for indicating whether to precode the SRS; wherein the indication information of the precoding matrix index is related to the precoding enabling indication information, that is: the precoding enabling indication information includes: indication information of a precoding matrix index.
When the precoding matrix indicated by the precoding matrix index is a unit array, the unit array corresponding to the 2 transmitting antennas is the unit arrayOr 4 unit array corresponding to transmitting antennaIf so, setting the SRS sent by the terminal equipment as a non-precoded SRS; and when the precoding matrix indicated by the precoding matrix index is a non-unit matrix, setting the SRS sent by the terminal equipment as the precoded SRS.
And if the precoding is required, precoding according to the indication information of the precoding matrix index.
Example eight
In this embodiment, the base station issues SRS configuration information to the user terminal, where the SRS configuration information includes: precoding enabling indication information for indicating whether to precode the SRS. The precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal device, or the joint indication information of antenna ports, scrambling ID and layer number.
When the precoding enabling indication information indicates that the SRS is to be precoded, the matrix is adoptedPrecoding the SRS, wherein RINCovariance matrix for interference plus noise, eta is a parameter predefined by base station and user equipment, ()TRepresenting the transpose of the fetch matrix.
The base station receives the precoded SRS, and measures to obtain an uplink equivalent channelThen obtaining the downlink equivalent channel through the channel reciprocity, and when the user equipment adopts the matrixWhen filtering and receiving the downlink signal, the downlink interference and noise can be whitened, so that the downlink transmission capacity can be increased, and the effect of improving the overall performance of the system is achieved.
Through the above description, it can be seen that the embodiment of the present invention can implement that the user terminal sends the precoded SRS, and bind the precoding enabling control of the SRS with the transmission mode or the downlink control signaling format or the number of transmission blocks or the joint indication information of the antenna port scrambling ID and the number of layers, thereby solving the problem of SRS precoding enabling control, saving the overhead of downlink signaling, and thus implementing more effective SRS precoding sending, saving SRS multiplexing resources, reducing the interference of SRS to neighboring cells, and further achieving the effect of improving the overall performance of the system.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (35)

1. A method for transmitting a Sounding Reference Signal (SRS), the method comprising:
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: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal equipment, or the joint indication information of antenna ports, scrambling code ID and layer number;
when the precoding enabling indication information includes a downlink control signaling format, the base station sets configuration information of an SRS, including:
when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, the base station sets the SRS sent by the terminal equipment as the precoded SRS; when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 0, or in the downlink control signaling format 4, or in the downlink control signaling format 1A, the base station sets the SRS sent by the terminal equipment as a non-precoded SRS;
or, when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, or in the downlink control signaling format 1A, the base station configures the SRS transmitted by the terminal device as the precoded SRS; when the base station triggers the terminal equipment to send the SRS by using the downlink control signaling in the downlink control signaling format 0 or the downlink control signaling format 4, the base station sets the SRS sent by the terminal equipment as a non-precoded SRS.
2. The method of claim 1, wherein when the precoding enabling indication information includes a downlink transmission mode, the base station sets configuration information of an SRS (sounding reference signal), and the method includes:
when the base station configures the terminal equipment to be in a downlink transmission mode, setting the SRS sent by the terminal equipment as a precoded SRS; when the base station configures the terminal equipment to be in an uplink transmission mode, setting the SRS sent by the terminal equipment as a non-precoded SRS;
or, when the base station configures the terminal device to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, setting the SRS sent by the terminal device to be the precoded SRS; when the base station configures the terminal device to be a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, setting the SRS transmitted by the terminal device to be a non-precoded SRS.
3. The method of claim 1, wherein when the precoding enabling indication information includes the number of transport blocks of the terminal device, the base station sets configuration information of the SRS, including:
when the base station configures the number of the uplink/downlink transmission blocks to be 1 or only one uplink/downlink transmission block is enabled to the terminal equipment, setting the SRS sent by the terminal equipment as a precoded SRS; and when the base station configures the number of the uplink/downlink transmission blocks to be 2 or both the uplink/downlink transmission blocks are enabled to the terminal equipment, setting the SRS sent by the terminal equipment as a non-precoded SRS.
4. The method of claim 1, wherein the precoding enabling indication information comprises: when the antenna port, the scrambling code ID and the combined indication information of the number of layers are used, the base station sets the configuration information of the SRS, which includes:
when the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 0 or 1, setting the SRS sent by the terminal equipment as a precoded SRS;
when the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 1 or 0, the SRS sent by the terminal equipment is set to be a non-precoded SRS.
5. The method of claim 1, wherein the precoding enabling indication information further comprises: information indicating a periodicity of the precoded SRS and a subframe offset.
6. The method of claim 5, wherein the base station sets configuration information of an SRS, further comprising:
and the base station sets the period of the precoded SRS and the information of subframe offset for the terminal equipment through high-level RRC signaling.
7. The method of claim 1, wherein the precoding enabling indication information further comprises: indication information of a precoding matrix index.
8. The method of claim 7, wherein the precoding enabling indication information comprises: when indicating information of a precoding matrix index, the base station sets configuration information of an SRS, including:
when a precoding matrix indicated by a precoding matrix index configured to the terminal equipment by the base station is a unit matrix, setting the terminal equipment to send a non-precoded SRS;
and when the precoding matrix indicated by the precoding matrix index configured to the terminal equipment by the base station is a non-unit matrix, setting the terminal equipment to send the precoded SRS.
9. A method for transmitting a Sounding Reference Signal (SRS), the method comprising:
the terminal equipment receives SRS configuration information issued by a base station, and sends a precoded SRS or an SRS which is not precoded according to the SRS configuration information;
the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal equipment, or the joint indication information of antenna ports, scrambling code ID and layer number;
when the precoding enabling indication information includes a downlink control signaling format, the terminal device sends a precoded SRS or an non-precoded SRS according to the configuration information, including:
when the terminal equipment receives a downlink control signaling which is sent by a base station and triggers sending of an SRS (sounding reference signal) in a downlink control signaling format 2B, a downlink control signaling format 2C or a downlink control signaling format 2D, the terminal equipment sends the precoded SRS; when receiving a downlink control signaling which is sent by a base station and triggers sending of an SRS (sounding reference signal) in a downlink control signaling format 0, a downlink control signaling format 4 or a downlink control signaling format 1A, sending a non-precoded SRS;
or, when receiving a downlink control signaling format 2B, or a downlink control signaling format 2C, or a downlink control signaling format 2D, or a downlink control signaling format 1A, which is sent by a base station and triggers sending of an SRS, the terminal device sends the precoded SRS; and when receiving a downlink control signaling which is sent by the base station and triggers sending of the SRS in a downlink control signaling format 0 or a downlink control signaling format 4, sending the non-precoded SRS.
10. The method of claim 9, wherein the terminal device transmits a precoded SRS or an un-precoded SRS according to the SRS configuration information, comprising:
when precoding enabling indication information in the SRS configuration information indicates enabling, the terminal equipment precodes the SRS to be transmitted and transmits the precoded SRS to the base station;
and when precoding enabling indication information in the SRS configuration information indicates that the SRS is not enabled, the terminal equipment transmits the non-precoded SRS to the base station.
11. The method of claim 9, wherein when the precoding enabling indication information includes a downlink transmission mode,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the terminal equipment determines that the terminal equipment is configured to be in a downlink transmission mode, sending a precoded SRS; when determining that the SRS is configured as an uplink transmission mode, transmitting a non-precoded SRS;
or when the terminal device determines that the terminal device is configured as a downlink transmission mode 8, a downlink transmission mode 9, a downlink transmission mode 10 or a downlink transmission mode 11, the terminal device sends the precoded SRS; and when determining that the transmission mode is configured to be other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10 and the downlink transmission mode 11, transmitting the non-precoded SRS.
12. The method of claim 9, wherein when the precoding enabling indication information includes the number of transport blocks of the terminal device,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the number of uplink/downlink transmission blocks of the terminal equipment configured by a base station is 1 or only one uplink/downlink transmission block is enabled, the terminal equipment sends a precoded SRS; and when the number of uplink/downlink transmission blocks of the terminal equipment configured by the base station is 2 or both the uplink/downlink transmission blocks are enabled, the terminal equipment sends a non-precoded SRS.
13. The method of claim 9, wherein when the precoding enabling indication information includes joint indication information of antenna ports, scrambling code IDs and number of layers,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when the high 1 bit value of the combined indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling received by the terminal equipment is 0 or 1, sending a precoded SRS; and when the value of the high 1 bit of the combined indication information of the antenna port, the scrambling code ID and the layer number in the received downlink control signaling is 1 or 0, sending the non-precoded SRS.
14. The method of claim 9, wherein the precoding enabling indication information further comprises: information indicating a periodicity of the precoded SRS and a subframe offset.
15. The method of claim 14, wherein the terminal device transmits a precoded SRS or an un-precoded SRS according to the configuration information, comprising:
when the terminal equipment determines that the subframe index of the subframe for sending the SRS, which is set by the base station, meets the relation between the indication precoded SRS period and the subframe offset, the terminal equipment sends the precoded SRS; otherwise, a non-precoded SRS is transmitted.
16. The method of claim 9, wherein the precoding enabling indication information further comprises: indication information of a precoding matrix index.
17. The method of claim 16, wherein when the precoding enabling indication information includes indication information of a precoding matrix index,
the terminal equipment sends the precoded SRS or the non-precoded SRS according to the configuration information, and the method comprises the following steps:
when a precoding matrix indicated by a precoding matrix index configured to a terminal device by a base station is a unit matrix, the terminal device sends a non-precoded SRS;
when a precoding matrix indicated by a precoding matrix index configured to the terminal equipment by the base station is a non-unitary matrix, the terminal equipment sends the precoded SRS.
18. A base station, characterized in that the base station comprises: the device comprises a setting module and a sending module; wherein,
the setting module is used for setting the configuration information of the SRS and forwarding the configuration information to the sending module;
the sending module is used for sending the configuration information of the SRS to the terminal equipment;
wherein the configuration information comprises: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal equipment, or the joint indication information of antenna ports, scrambling code ID and layer number;
when the precoding enabling indication information comprises a downlink control signaling format,
when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, the setting module is configured to set the SRS transmitted by the terminal device to be a precoded SRS; when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in downlink control signaling format 0, or downlink control signaling format 4, or downlink control signaling format 1A, the setting module is configured to set the SRS transmitted by the terminal device to be a non-precoded SRS;
or, when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 2B, or in the downlink control signaling format 2C, or in the downlink control signaling format 2D, or in the downlink control signaling format 1A, the setting module is configured to configure the SRS transmitted by the terminal device as the precoded SRS; when the base station triggers the terminal device to transmit the SRS by using the downlink control signaling in the downlink control signaling format 0 or the downlink control signaling format 4, the setting module is configured to set the SRS transmitted by the terminal device to be a non-precoded SRS.
19. The base station of claim 18, wherein when the precoding enabling indication information comprises a downlink transmission mode,
when the base station configures the terminal device to be in a downlink transmission mode, the setting module is configured to set the SRS sent by the terminal device to be a precoded SRS; when the base station configures the terminal device to be in an uplink transmission mode, the setting module is used for setting the SRS sent by the terminal device to be a non-precoded SRS;
or, when the base station configures the terminal device to be in the downlink transmission mode 8, or the downlink transmission mode 9, or the downlink transmission mode 10, or the downlink transmission mode 11, the setting module is configured to set the SRS sent by the terminal device to be the precoded SRS; when the base station configures the terminal device to be a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10, and the downlink transmission mode 11, the setting module is configured to set the SRS sent by the terminal device to be a non-precoded SRS.
20. The base station of claim 18, wherein when the precoding enabling indication information includes the number of transport blocks of the terminal device,
when the base station configures the number of the uplink/downlink transmission blocks to be 1 or only one uplink/downlink transmission block is enabled to the terminal equipment, the setting module is configured to set the SRS sent by the terminal equipment to be the precoded SRS; and when the base station configures the number of the uplink/downlink transmission blocks to be 2 or both the uplink/downlink transmission blocks are enabled for the terminal equipment, the setting module is configured to set the SRS sent by the terminal equipment to be a non-precoded SRS.
21. The base station of claim 18, wherein the precoding enabling indication information comprises: when the antenna port, the scrambling code ID and the joint indication information of the layer number,
when the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the number of layers in the downlink control signaling configured by the base station to the terminal device is 0 or 1, the setting module is configured to set the SRS sent by the terminal device to be a precoded SRS;
and when the value of the high 1 bit of the joint indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling configured by the base station to the terminal equipment is 1 or 0, the setting module is used for setting the SRS sent by the terminal equipment to be the non-precoded SRS.
22. The base station of claim 18, wherein the precoding enabling indication information further comprises: information indicating a periodicity of the precoded SRS and a subframe offset.
23. The base station of claim 22,
the setting module is further configured to set the period of the precoded SRS and the subframe offset information for the terminal device through a high-level RRC signaling.
24. The base station of claim 18, wherein the precoding enabling indication information further comprises: indication information of a precoding matrix index.
25. The base station of claim 24, wherein the precoding enabling indication information comprises: when the indication information of the precoding matrix index is,
when the precoding matrix indicated by the precoding matrix index configured to the terminal equipment by the base station is a unit matrix, the setting module is used for setting the terminal equipment to send the non-precoded SRS;
and when the precoding matrix indicated by the precoding matrix index configured by the base station to the terminal equipment is a non-unitary matrix, the setting module is used for setting the terminal equipment to send the precoded SRS.
26. A terminal device, characterized in that the terminal device comprises: the device comprises a receiving module and a processing and sending module; wherein,
the receiving module is used for receiving the configuration information of the SRS issued by the base station and forwarding the configuration information to the processing and sending module;
the processing and transmitting module is used for transmitting a precoded SRS or an SRS which is not precoded according to the SRS configuration information;
the configuration information includes: precoding enabling indication information for indicating whether the terminal equipment precodes the SRS or not;
wherein the precoding enabling indication information includes:
downlink transmission mode, or downlink control signaling format, or the number of transmission blocks of the terminal equipment, or the joint indication information of antenna ports, scrambling code ID and layer number;
when the precoding enabling indication information comprises a downlink control signaling format,
the processing and transmitting module is used for the terminal equipment to transmit the precoded SRS when receiving the downlink control signaling which is sent by the base station and triggers the SRS transmission in a downlink control signaling format 2B, a downlink control signaling format 2C or a downlink control signaling format 2D; when the terminal equipment receives a downlink control signaling which is sent by a base station and triggers sending of an SRS (sounding reference signal) in a downlink control signaling format 0, a downlink control signaling format 4 or a downlink control signaling format 1A, the terminal equipment sends a non-precoded SRS;
or, the terminal device sends the precoded SRS when receiving a downlink control signaling format 2B, a downlink control signaling format 2C, a downlink control signaling format 2D, or a downlink control signaling format 1A sent by the base station to trigger sending the SRS; and when the terminal equipment receives a downlink control signaling which is sent by the base station and triggers sending of the SRS in a downlink control signaling format 0 or a downlink control signaling format 4, the terminal equipment sends the non-precoded SRS.
27. The terminal device of claim 26,
the processing and transmitting module is configured to precode the SRS to be transmitted and transmit the precoded SRS to the base station when it is determined that precoding enabling indication information in the SRS configuration information indicates enabling;
and when determining that the precoding enabling indication information in the SRS configuration information indicates that the SRS is not enabled, transmitting the non-precoded SRS to the base station.
28. The terminal device according to claim 26, wherein when the precoding enabling indication information includes a downlink transmission mode,
the processing and transmitting module is configured to transmit a precoded SRS when it is determined that the terminal device is configured in the downlink transmission mode; when the terminal equipment is configured to be in an uplink transmission mode, sending a non-precoded SRS;
or, when determining that the terminal device is configured as a downlink transmission mode 8, or a downlink transmission mode 9, or a downlink transmission mode 10, or a downlink transmission mode 11, sending the precoded SRS; and when determining that the terminal equipment is configured to be in a transmission mode other than the downlink transmission mode 8, the downlink transmission mode 9, the downlink transmission mode 10 and the downlink transmission mode 11, transmitting a non-precoded SRS.
29. The terminal device of claim 26, wherein when the precoding enabling indication information includes a number of transport blocks of the terminal device,
the processing and transmitting module is configured to transmit a precoded SRS when the number of uplink/downlink transport blocks of the terminal device configured by the base station is determined to be 1 or only one uplink/downlink transport block is enabled; and when the number of the uplink/downlink transmission blocks of the terminal equipment configured by the base station is determined to be 2 or both the uplink/downlink transmission blocks are enabled, sending the non-precoded SRS.
30. The terminal device of claim 26, wherein when the precoding enabling indication information comprises joint indication information of antenna ports, scrambling code IDs and number of layers,
the processing and sending module is used for sending the precoded SRS when the high 1 bit value of the combined indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling received by the terminal equipment is 0 or 1; and when the high 1 bit value of the combined indication information of the antenna port, the scrambling code ID and the layer number in the downlink control signaling received by the terminal equipment is 1 or 0, sending the non-precoded SRS.
31. The terminal device according to claim 26, wherein the precoding enabling indication information further comprises: information indicating a periodicity of the precoded SRS and a subframe offset.
32. The terminal device of claim 31,
the processing and transmitting module is further configured to transmit the precoded SRS when it is determined that the subframe index of the SRS-transmitting subframe set by the base station satisfies the relationship between the instructed precoded SRS period and the subframe offset; otherwise, a non-precoded SRS is transmitted.
33. The terminal device according to claim 26, wherein the precoding enabling indication information further comprises: indication information of a precoding matrix index.
34. The terminal device according to claim 33, wherein when the precoding enabling indication information includes indication information of a precoding matrix index,
the processing and transmitting module is used for transmitting a non-precoded SRS when the precoding matrix indicated by the precoding matrix index configured to the terminal equipment by the base station is determined to be a unit matrix; and when the precoding matrix indicated by the precoding matrix index configured to the terminal equipment by the base station is determined to be a non-unit matrix, sending the precoded SRS.
35. A transmission system for measuring a reference signal, SRS, the system comprising: the base station of any of claims 18-25 and the terminal device of any of claims 26-34.
CN201510057156.8A 2015-02-03 2015-02-03 A kind of sending method of measuring reference signals, equipment and system Active CN105991264B (en)

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Publication number Priority date Publication date Assignee Title
CN115987343A (en) 2016-08-10 2023-04-18 Idac控股公司 Methods, apparatus, systems, and procedures for Uplink (UL) channel reciprocity
CN107888255B (en) * 2016-09-30 2023-07-14 中兴通讯股份有限公司 Method, device and system for sending uplink reference signals, base station and terminal
US10469224B2 (en) * 2016-09-30 2019-11-05 Qualcomm Incorporated Joint transmission of precoded and unprecoded sounding reference signals in uplink
CN108023700B (en) * 2016-11-04 2022-08-26 中兴通讯股份有限公司 Pilot frequency parameter feedback and configuration method and device, user terminal and base station
US10911195B2 (en) 2017-01-08 2021-02-02 Lg Electronics Inc. Method for uplink transmission and reception in wireless communication system and apparatus therefor
CN111446995B (en) * 2017-04-18 2024-08-16 Oppo广东移动通信有限公司 User equipment for multi-antenna transmission, method and device in base station
PL3692639T3 (en) 2017-10-02 2022-04-11 Telefonaktiebolaget Lm Ericsson (Publ) Sounding reference transmission
CN109802801B (en) 2017-11-17 2021-12-14 华为技术有限公司 Method, device and system for transmitting and receiving signals
CN113597001A (en) * 2020-04-30 2021-11-02 华为技术有限公司 Signal receiving method, signal sending method and corresponding devices

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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CN102111246B (en) * 2011-01-12 2017-03-29 中兴通讯股份有限公司 The method and user equipment of feeding back channel state information
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CN102332945B (en) * 2011-09-30 2017-08-25 中兴通讯股份有限公司 A kind of information feedback method and user equipment
CN107040490A (en) * 2012-02-01 2017-08-11 华为技术有限公司 Demodulated pilot signal processing method, base station and user equipment
US9596065B2 (en) * 2012-10-24 2017-03-14 Qualcomm Incorporated Enhanced SRS transmission for MIMO operation in LTE-A

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