WO2017016216A1 - Procédé d'émission d'un signal de synchronisation de porteuse sans licence, station de base et support de stockage - Google Patents

Procédé d'émission d'un signal de synchronisation de porteuse sans licence, station de base et support de stockage Download PDF

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Publication number
WO2017016216A1
WO2017016216A1 PCT/CN2016/074100 CN2016074100W WO2017016216A1 WO 2017016216 A1 WO2017016216 A1 WO 2017016216A1 CN 2016074100 W CN2016074100 W CN 2016074100W WO 2017016216 A1 WO2017016216 A1 WO 2017016216A1
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Prior art keywords
drs
subframe
configuring
preset
configuration
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English (en)
Chinese (zh)
Inventor
赵亚军
徐汉青
莫林梅
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery

Definitions

  • the present invention relates to a wireless communication technology, and in particular, to a method for transmitting a synchronization signal of an unlicensed carrier, a base station, and a storage medium.
  • LTE-U Long Term Evolution-Unlicensed
  • Wired Fidelity Wireless Fidelity
  • radar radar
  • other different systems and the LTE-U system. Does not affect and retain LTE technology features.
  • the unlicensed carrier is required to support the LBT (Listen before Talk) function.
  • the Clear Channel Assessment (CCA) function needs to be performed. If the device is found to be using the unlicensed carrier, or the detected signal energy exceeds the CCA threshold, the access is delayed. If the channel is found to be idle, or the detected signal energy is lower than the CCA threshold, the unlicensed carrier is occupied.
  • the use of unlicensed carriers requires solving problems such as cell discovery and synchronization.
  • the discovery reference signal (DRS, Discovery Reference Signal) in the prior art can be used for cell discovery or synchronization of a common authorized carrier; wherein the DRS includes a primary synchronization signal/synchronization signal (PSS/SSS, Primary Synchronization Signal/Secondary Synchronization Signal) ), channel state indication reference signal (CSI-RS, Channel State Indication RS), common reference signal (CRS, Cell-specific Reference Signals).
  • PSS/SSS Primary Synchronization Signal/Secondary Synchronization Signal
  • CSI-RS channel state indication reference signal
  • CRS Cell-specific Reference Signals
  • the embodiment of the present invention is to provide a method for transmitting a synchronization signal of an unlicensed carrier, a base station, and a storage medium, which can implement transmission of a synchronization signal of an unlicensed carrier.
  • An embodiment of the present invention provides a method for sending a synchronization signal of an unlicensed carrier, where the method includes:
  • the base station configures a DRS transmission pattern;
  • the DRS transmission pattern includes at least one of the following parameters: a time parameter, a frequency domain location, and a component parameter;
  • the DRS is transmitted based on the configured DRS transmission pattern such that the DRS is periodic and/or persistent, or non-periodic and/or persistent.
  • the configuring a DRS transmission pattern includes: when the DRS is in a first half of a radio frame, configuring the DRS to be configured by using a reference signal structure based on a first preset subframe; and/or, when the DRS is in In the latter half of the radio frame, configuring the DRS is configured by using a reference signal structure based on the second preset subframe.
  • the configuring a DRS transmission pattern includes: configuring a DRS in a DRS time window; and the DRS time window has a pre-configured time domain location and a time domain length.
  • the configuring the DRS transmission pattern includes: when the starting subframe occupied by the DRS is an odd subframe or an even subframe, adopting a configuration manner corresponding to the odd subframe or the even subframe;
  • the configuration manner corresponding to the odd subframe or the even subframe includes: a PSS/SSS mapping corresponding to a parity of the starting subframe occupied by the DRS according to a parity of the starting subframe;
  • the DRS is composed of at least two subframes, starting with a subframe of an odd subframe or an even subframe Configuring the DRS;
  • the DRS is composed of at least one DRS structure.
  • the configuring a DRS transmission pattern includes: when configuring an Orthogonal Frequency Division Multiplexing (OFDM) symbol occupied by a DRS as an odd symbol or an even symbol, using the odd symbol or The transmission method corresponding to the even symbol;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the sending manner corresponding to the odd symbol or the even symbol includes: a PSS/SSS mapping corresponding to a parity of the initial OFDM symbol occupied by the DRS according to a parity of the initial OFDM symbol;
  • the DRS when the DRS is composed of at least two OFDM symbols, configuring the DRS with an odd OFDM symbol or an even OFDM symbol as a starting position;
  • the DRS is composed of a DRS structure of at least one OFDM symbol.
  • the configuring a DRS sending pattern includes: configuring a DRS and/or a reserved signal according to a preset rule;
  • the DRS and/or the reserved signal are configured according to a preset rule, including:
  • the configured DRS transmission pattern includes only DRS
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the DRS and the reserved signal are independent signals;
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the reserved signal is a component of the DRS.
  • the configuring the DRS to send the pattern includes: configuring the DRS to occupy the system bandwidth in the frequency domain according to the first preset configuration manner;
  • the DRS configured to occupy the system bandwidth in the frequency domain according to the first preset configuration manner includes:
  • Different bandwidths are respectively configured with DRS frequency domains according to preset rules; or,
  • a preset PSS/SSS structure is configured in a preset resource block (RB) of the intermediate frequency band of the frequency domain, and RBs on both sides of the preset RB configure other signals according to a preset configuration manner.
  • RB resource block
  • the configuring the DRS to send the pattern includes: configuring, according to the second preset manner, that the DRS is sent simultaneously or not simultaneously with the user data;
  • the sending, by the second preset manner, the DRS and the user data are sent at the same time or different times, including:
  • the configuration DRS is sent simultaneously or not simultaneously with the user data;
  • the configuration DRS is transmitted simultaneously or not simultaneously with the user data.
  • the configuring a DRS transmission pattern includes: configuring the DRS to be a periodic or aperiodic transmission mode;
  • the configuration of the DRS is a periodic transmission mode, including: the DRS transmission pattern is in a static or semi-static configuration; and the semi-static configuration indicates that the DRS transmission pattern does not change within a preset period;
  • the configuring the DRS to be an aperiodic transmission mode includes: dynamically configuring a DRS transmission pattern, where the DRS is triggered based on dynamic signaling.
  • the configuring a DRS transmission pattern includes: configuring a sounding reference signal (SRS) along with a DRS transmission;
  • SRS sounding reference signal
  • the configuration SRS is accompanied by DRS transmission, including:
  • the SRS is configured to accompany the DRS transmission based on the signaling indication.
  • the sending, by the configuration, the DRS transmission pattern, the DRS includes: configuring a broadcast channel to be accompanied by DRS transmission;
  • the configuration broadcast channel is accompanied by DRS transmission, including:
  • the configuration broadcast channel is accompanied by periodic DRS transmission, and the aperiodic DRS is not accompanied by the broadcast channel;
  • the number of antenna ports corresponding to the broadcast channel is the same as the number of antenna ports corresponding to the CRS component in the DRS; or
  • the configuration broadcast channel is transmitted on at least one of the predefined groups of carriers, and the other carriers in the carrier are not configured to transmit the broadcast channel.
  • the sending, by the configuration, the DRS transmission pattern, the DRS includes: controlling, according to the configured DRS transmission pattern, the periodic DRS and/or the aperiodic DRS according to the LBT transmission according to the third preset manner; or, pressing The fourth preset mode control period DRS and/or aperiodic DRS is not transmitted based on LBT.
  • configuring the DRS to be configured by using a reference signal structure of the first preset subframe including: configuring the subframe 1 to the subframe 4 to be sent in the radio frame.
  • the DRS adopts a deformation based on the RS sequence corresponding to the subframe 0;
  • configuring the DRS to be configured by using a reference signal structure based on the second preset subframe including: configuring the DRS sent in the subframe 6 to the subframe 9 to be based on the subframe 5 The deformation of the corresponding RS sequence.
  • the variant based on the RS sequence corresponding to the subframe 0 includes: configuring the subframe 1 to the subframe 4 to rotate an offset with respect to the RS sequence of the subframe 0;
  • the configuration of the DRS transmitted in the subframe 6 to the subframe 9 is based on the modification of the RS sequence corresponding to the subframe 5, and includes: configuring the subframe 6 to the subframe 9 to sequentially rotate by one offset with respect to the RS sequence of the subframe 5.
  • the DRS when the DRS is in the first half of the radio frame, configuring the DRS to be configured by using a reference signal structure of the first preset subframe, including: configuring the subframe 1 to the subframe 4 to be sent in the radio frame.
  • the DRS adopts an RS sequence corresponding to subframe 0;
  • configuring the DRS to be configured by using a reference signal structure based on the second preset subframe including: configuring the DRS sent in the subframe 6 to the subframe 9 to be based on the subframe 5 Corresponding RS sequence.
  • the DRS when the DRS is in the first half of the radio frame, configuring the DRS to be configured by using a reference signal structure of the first preset subframe, including: when in a time division duplex (TDD) mode, and the DRS is based on
  • TDD time division duplex
  • PSS/SSS primary synchronization signal/synchronization signal
  • the DRS transmitted in the subframes 0 to 4 in the configuration radio frame is composed of the SSS of the subframe 0 and the PSS structure of the subframe 1;
  • the DRS When the DRS is in the second half of the radio frame, configuring the DRS to be configured by using a reference signal structure based on the second preset subframe, including: when in the TDD mode, and the DRS is configured based on the PSS/SSS structure, configuring the wireless
  • the DRS transmitted in the subframe 5 to the subframe 9 in the frame is composed of the SSS of the subframe 5 and the PSS structure of the subframe 6.
  • the reference signal structure includes at least a reference signal (RS) sequence.
  • RS reference signal
  • An embodiment of the present invention further provides a base station, where the base station includes: a configuration unit and a sending unit;
  • the configuration unit is configured to configure a DRS transmission pattern;
  • the DRS transmission pattern includes at least one of the following parameters: a time parameter, a frequency domain location, and a component parameter;
  • the transmitting unit is configured to send the DRS based on the configured DRS transmission pattern to make the DRS periodic and/or persistent, or non-periodic and/or persistent.
  • the configuration unit is configured to configure, when the DRS is in the first half of the radio frame, the DRS is configured by using a reference signal structure based on the first preset subframe; and/or, when the DRS is in the radio frame In the latter half of the frame, configuring the DRS is configured by using a reference signal structure based on the second preset subframe.
  • the configuration unit is configured to configure the DRS in a DRS time window; the DRS time window has a pre-configured time domain location and a time domain length.
  • the configuration unit is configured to adopt a configuration manner corresponding to the odd subframe or the even subframe when the initial subframe occupied by the DRS is an odd subframe or an even subframe;
  • the configuration manner corresponding to the odd subframe or the even subframe includes: a PSS/SSS mapping corresponding to a parity of the starting subframe occupied by the DRS according to a parity of the starting subframe;
  • the DRS when the DRS is composed of at least two subframes, configuring the DRS with the odd subframe or the even subframe as the starting subframe;
  • the DRS is composed of at least one DRS structure.
  • the configuration unit is configured to configure, when the initial orthogonal frequency division multiplexing OFDM symbol occupied by the DRS burst is an odd symbol or an even symbol, adopt a sending manner corresponding to the odd symbol or the even symbol;
  • the sending manner corresponding to the odd symbol or the even symbol includes: a PSS/SSS mapping corresponding to a parity of the initial OFDM symbol occupied by the DRS according to a parity of the initial OFDM symbol;
  • the DRS when the DRS is composed of at least two OFDM symbols, configuring the DRS with an odd OFDM symbol or an even OFDM symbol as a starting position;
  • the DRS consists of a DRS structure of at least one OFDM symbol.
  • the configuration unit is configured to configure the DRS and/or the reserved signal according to a preset rule
  • the DRS and/or the reserved signal are configured according to a preset rule, including:
  • the configured DRS transmission pattern includes only DRS
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the DRS and the reserved signal are independent signals;
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the reserved signal is a component of the DRS.
  • the configuration unit is configured to configure the DRS to occupy the system bandwidth in the frequency domain according to the first preset configuration manner; wherein the configuring the DRS in the first preset configuration manner to occupy the frequency domain
  • the system bandwidth includes: configuring the system bandwidth DRS frequency domain pattern according to the preset unit DRS frequency domain pattern; or, configuring the DRS frequency domain according to a preset rule for different bandwidths; or configuring the regular PSS in the frequency band intermediate frequency band preset RB configuration /SSS structure, the RBs on both sides of the preset RB configure other signals according to a preset configuration manner.
  • the configuration unit is configured to send the DRS and the user data at the same time or different times according to the second preset manner; wherein the DRS is configured in the second preset manner and the user data is simultaneously Or sending at different times, including: when the DRS transmission pattern in the first preset time domain is consistent with the DRS transmission pattern in the second preset time domain, the configuration DRS is sent simultaneously or not simultaneously with the user data; or
  • the configuration DRS is transmitted simultaneously or not simultaneously with the user data.
  • the configuration unit is configured to configure the DRS to be a periodic or aperiodic transmission mode, where the configuring the DRS is a periodic transmission mode, including: the DRS transmission pattern is in a static or semi-static configuration.
  • the semi-static configuration characterizing the DRS transmission pattern
  • the DRS is configured to be a non-periodic transmission mode, and includes: DRS transmission pattern dynamic configuration, and the DRS is triggered based on dynamic signaling.
  • the configuration unit is configured to configure SRS to be associated with DRS transmission, and the configuration SRS is accompanied by DRS transmission, including: configuring the SRS to be sent with the DRS of the serving cell where the UE is located; or configuring the SRS and the UE where the UE is located.
  • the aperiodic DRS of the serving cell is accompanied by the transmission; or the SRS is configured to be accompanied by the periodic DRS of the serving cell and the neighboring cell where the UE is located; or the SRS is configured to be accompanied by the DRS transmission based on the signaling indication.
  • the configuration unit is configured to configure a broadcast channel with DRS transmission, where the configuration broadcast channel is accompanied by DRS transmission, including: configuring a broadcast channel with periodic DRS transmission, and the aperiodic DRS is not accompanied by a broadcast channel.
  • configuring the broadcast channel start OFDM symbol to be the same as the first group of PSS/SSS start OFDM symbols of the DRS component; or configuring the antenna corresponding to the number of antenna ports corresponding to the CRS component in the DRS The number of ports is consistent; or, the configuration broadcast channel is transmitted on the OFDM symbol in which the CRS component in the DRS is located, and/or on the OFDM symbol adjacent to the CRS; or, the broadcast channel is configured in at least one of the predefined carrier groups. Transmitted on one carrier, other carriers in the carrier are not configured to transmit the broadcast channel.
  • the sending unit is configured to control the periodic DRS and/or the aperiodic DRS according to the third preset manner, according to the configured DRS sending pattern, based on the first listening and then speaking, the LBT sending; or, according to the fourth preset
  • the mode control period DRS and/or the aperiodic DRS are not transmitted based on LBT.
  • the configuration unit is configured to configure, in the radio frame, the DRS sent by the subframe 1 to the subframe 4 to be deformed according to the RS sequence corresponding to the subframe 0; and/or configured in the subframe 6 to The DRS transmitted by the subframe 9 adopts a variant based on the RS sequence corresponding to the subframe 5.
  • the configuration unit is configured to configure subframe 1 to subframe 4 to rotate by one offset with respect to the RS sequence of subframe 0; and/or, configure subframe 6 to subframe 9 to sequentially The RS sequence of subframe 5 is rotated by an offset.
  • the configuration unit is configured to configure, in the radio frame, the DRS sent by the subframe 1 to the subframe 4 to adopt an RS sequence corresponding to the subframe 0; and/or, configured in the subframe 6 to the subframe.
  • the transmitted DRS adopts an RS sequence corresponding to subframe 5.
  • the configuration unit is configured to configure, when the TRS is in the TDD mode, and the DRS is configured based on the PSS/SSS structure, the DRS sent in the subframe 0 to the subframe 4 in the radio frame adopts the SSS and the subframe of the subframe 0.
  • the PSS structure of 1 is configured; and/or the DRS transmitted in the subframe 5 to the subframe 9 in the radio frame is configured by the SSS of the subframe 5 and the PSS structure of the subframe 6.
  • the reference signal structure includes at least an RS sequence.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to perform the sending of the synchronization signal of the unlicensed carrier according to the embodiment of the present invention. method.
  • a method for transmitting a synchronization signal of an unlicensed carrier, a base station, a storage medium, and a base station configuration discovery reference signal DRS transmission pattern includes at least one of the following parameters: a time parameter, a frequency domain location, A parameter is configured; the DRS is transmitted based on the configured DRS transmission pattern such that the DRS is periodic and/or persistent, or non-periodic and/or persistent.
  • the synchronization signal of the unlicensed carrier is transmitted, and the non-authorization can be satisfied.
  • FIG. 1 is a schematic flowchart of a method for transmitting a synchronization signal of an unlicensed carrier according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a first DRS transmission pattern in Embodiment 1 of the present invention.
  • FIG. 3 is a schematic diagram of a second DRS transmission pattern in Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of a third DRS transmission pattern in Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a fourth DRS transmission pattern according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a fifth DRS transmission pattern according to Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of a sixth DRS transmission pattern according to Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram of a seventh DRS transmission pattern according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of an eighth DRS transmission pattern according to Embodiment 1 of the present invention.
  • FIG. 10 is a schematic diagram of a ninth DRS transmission pattern according to Embodiment 1 of the present invention.
  • FIG. 11 is a schematic structural diagram of a base station according to Embodiment 2 of the present invention.
  • the embodiment of the invention provides a method for transmitting a synchronization signal.
  • 1 is a schematic flowchart of a method for transmitting a synchronization signal of an unlicensed carrier according to Embodiment 1 of the present invention; as shown in FIG. 1, the method for transmitting a synchronization signal includes:
  • Step 101 Configure a DRS transmission pattern.
  • the DRS transmission pattern includes at least one of the following parameters: a time parameter, a frequency domain location, and a component parameter.
  • Step 102 Send the DRS based on the configured DRS transmission pattern to make the DRS periodic and/or persistent, or non-periodic and/or persistent.
  • the configuring the DRS sending pattern includes:
  • configuring the DRS is configured by using a reference signal structure based on the first preset subframe; and/or, when the DRS is in the second half of the radio frame, configuring the DRS based on the first The reference signal structure of the two preset sub-frames.
  • the first preset subframe may be a subframe 0; and the second preset subframe may be a subframe 5.
  • the present embodiment has the following preferred embodiments:
  • Embodiment 1 DRS transmitted in subframe 0 to subframe 4 in a radio frame is configured by a reference signal (RS) structure based on subframe 0; correspondingly, DRS transmitted in subframe 5 to subframe 9 in a radio frame It is constructed using a subframe structure based on subframe 5.
  • 2 is a schematic diagram of a first DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 2, when the DRS is in a subframe 2, the DRS is configured by using an RS structure of a subframe 0; When the DRS is in the subframe 6, the DRS is constructed using the RS structure of the subframe 5.
  • RS reference signal
  • Embodiment 2 When Time Division Duplex (TDD) is used, and DRS is configured based on a primary synchronization signal/synchronization signal (PSS/SSS) structure, subframe 0 to subframe 4 are transmitted in one radio frame.
  • the DRS is composed of the SSS of the subframe 0 and the PSS structure of the subframe 1.
  • the DRS transmitted in the subframe 5 to the subframe 9 in one radio frame is composed of the SSS of the subframe 5 and the PSS structure of the subframe 6.
  • Embodiment 3 When Frequency Division Duplex (FDD) is used, and DRS is configured based on a primary synchronization signal/synchronization signal (PSS/SSS) structure, subframe 0 to subframe 4 are transmitted in one radio frame.
  • the DRS is constructed by using the PSS/SSS structure of the subframe 0; correspondingly, the DRS transmitted in the subframe 5 to the subframe 9 in one radio frame is configured by the PSS/SSS structure of the subframe 5.
  • FDD Frequency Division Duplex
  • PSS/SSS primary synchronization signal/synchronization signal
  • Embodiment 4 The DRS transmitted in the subframe 1 to the subframe 4 in the radio frame adopts a variant based on the RS sequence corresponding to the subframe 0; the DRS transmitted in the subframe 6 to the subframe 9 adopts the RS sequence corresponding to the subframe 5
  • the deformation may be an RS sequence rotation.
  • the subframe 1 to the subframe 4 are sequentially rotated by an offset with respect to the RS sequence of the subframe 0; correspondingly, the subframe 6 to the subframe 9 are sequentially rotated by an offset with respect to the RS sequence of the subframe 5.
  • the relationship between the RS sequence and the RS sequence of the subframe 0 can be used to determine the front and rear fields of one radio frame, and different subframes can be distinguished by different deformation characteristics (such as the amount of rotation) of different subframes.
  • deformation characteristics such as the amount of rotation
  • the complexity of sequence generation and detection can be simplified.
  • the DRS in the first half of the radio frame (ie, the subframe 0 to the subframe 4) is configured by using the RS structure based on the subframe 0, and is located in the second half of the radio frame (ie, the subframe 5 to the subframe 9).
  • the DRS is constructed using a subframe structure based on subframe 5.
  • 3 is a schematic diagram of a second DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG.
  • the DRS when the DRS is both on the subframe 4 and also on the subframe 5, that is, the DRS is simultaneously
  • the DRS is in the first half of the radio frame (ie, in subframe 4).
  • the part is configured by using the RS structure of the subframe 0.
  • the part of the DRS that is in the second half of the radio frame (that is, in the subframe 5) is configured by using the RS structure of the subframe 5.
  • This mode can maintain the uniformity of different mapping scenarios.
  • the sequence in the DRS is generated in two categories.
  • the user equipment (UE) also needs to detect two types separately.
  • the DRS burst structure When the starting subframe of the DRS burst structure is in the first half of the radio frame (ie, subframe 0 to subframe 4), the DRS burst structure also includes the second half of the radio frame ( That is, subframe 5 to subframe 9), in this scenario, the transmitted DRS is constructed using a subframe structure based on subframe 0. Similarly, when the starting subframe of the DRS burst is in the second half of the radio frame (subframe 5 to subframe 9), the DRS burst structure simultaneously includes the first half of the next radio frame of the radio frame. In this scenario, the transmitted DRS is constructed using a subframe structure based on subframe 5.
  • FIG. 4 is a schematic diagram of a third DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 4, when the start position of the DRS is in subframe 4 and includes subframe 5, that is, the DRS is simultaneously When the upper field and the lower field of the radio frame are included, the DRS is configured by using an RS structure based on subframe 0. This mode can maintain only one type of RS sequence for one DRS burst.
  • the configuring the DRS transmission pattern includes: configuring the DRS in a DRS time window; and the DRS time window has a pre-configured time domain location and a time domain length.
  • the start position and the end position of one DRS burst are within one DRS time window.
  • the DRS burst can select a fixed or variable time starting point within the DRS time window
  • the end point does not exceed the DRS time window
  • the initial transmission point may be a result based on the LBT execution, or may be an initial transmission point configured based on the coordination requirement.
  • the DRS time window adopts a preset configuration parameter;
  • the preset configuration parameter may be a configuration parameter of a DRS burst in the LTE R12 version, and the duration of the DRS time window in the FDD system may be 1 millisecond (ms) ) to 5 ms; the duration of the DRS time window in the TDD system may be 2 ms to 5 ms.
  • the DRS parameter in the prior art may also be used.
  • the DRS parameter refers to the duration of a DRS burst of R12 in the prior art, and now refers to a time window range of a DRS burst that may occur; preemption and transmission. Limiting to this range also favors the scope limitation of the UE detection, rather than any location.
  • the processing manner may include at least the following:
  • FIG. 5 is a schematic diagram of a fourth DRS transmission pattern in the first embodiment of the present invention; as shown in FIG. 5, the DRS burst part exceeding the time window is intercepted. Do not send.
  • the second processing mode limiting the starting point of the DRS burst, avoiding that the end portion of the DRS burst exceeds the DRS time window. Although this limits the flexibility of the selection of the starting point of the DRS burst, the time domain length of the DRS burst is guaranteed, which is beneficial to ensure the measurement requirements of the UE;
  • the third processing mode is: when one DRS burst is composed of at least one component repetition, for example, two PSS+SSS are used as basic constituent units, and it is assumed that the basic constituent unit occupies 4 OFDM symbols; then, one transmission is repeated, if DRS When the time window end position is at the intermediate position of the basic constituent unit, the transmission time of the current DRS burst is extended until all the components of the basic constituent unit are transmitted.
  • the configuring the DRS transmission pattern includes: when the initial subframe occupied by the DRS is an odd subframe or an even subframe, the corresponding subframe or even subframe is used. Configuration method.
  • the configuration manner in which the initial subframe occupied by the DRS is an odd subframe or an even subframe includes the following methods:
  • Mode 1 For the TDD structure, when the PSS and the SSS are respectively mapped to the SPS and the SSS, the PSS/SSS mapping corresponding to the parity of the starting subframe is used for the starting subframe occupied by the DRS burst. .
  • the mapping is PSS; similarly, when the original subframe is mapped to the PSS, When the starting subframe occupied by the DRS burst is an odd subframe, it is mapped to PSS. This mode can maintain the uniformity of parity subframe mapping.
  • Maintaining uniformity may enable the UE to retrieve the PSS/SSS correspondingly based on the parity attributes of the received subframe. Therefore, the PSS or SSS corresponding to the odd/even subframes in different cases is not changed because the parity attributes of the initial subframes are different, thereby bringing about detection complexity.
  • Mode 2 When the DRS burst is composed of at least two subframes, the DRS burst is configured with the odd subframe or the even subframe as the starting subframe.
  • the preset structure A configured with the odd subframe as the initial subframe is taken as an example.
  • the configuration is configured according to the preset structure A. The DRS bursts and sends.
  • the DRS when the start subframe of the DRS burst is an even subframe, the DRS is configured to remove the part of the odd subframe of the preset structure A, and only retain the a portion of the even subframe of the preset structure A and a portion after the even subframe; or, a portion of the even subframe of the preset structure A is used as a starting subframe, and the preset structure A
  • the odd subframe portion before the subframe is configured to the end of the DRS burst.
  • Manner 3 The DRS structures of the odd sub-frames and the even sub-frames are respectively configured; the primary DRS burst is composed of at least one DRS structure.
  • the mapping is pre-configured
  • the DRS structure corresponding to the odd subframe is set; when the starting position of the DRS burst is an even subframe, the DRS structure corresponding to the pre-configured even subframe is mapped. This method provides better flexibility and can be transmitted without being restricted by the parity attribute of the starting subframe.
  • the configuration of the DRS may also select a combination of at least one of the above three modes.
  • Further implementation includes:
  • the starting position of the DRS is defined, so that only the configuration of one of the above three methods is used before the configuration of the DRS is changed in different time slots.
  • the DRS structure corresponding to the odd subframe configuration manner in the foregoing three manners is used; or, when DRS If the starting position is an even subframe, and the DRS is only mapped in the even subframe configuration transmission, the DRS structure of the even subframe mode in the above three manners is used correspondingly; or, when the starting position of the DRS is even When the subframe is mapped and the DRS is simultaneously mapped and transmitted in the even subframe and the odd subframe configuration, the DRS structure including the even subframe and the odd subframe mode in the above three manners is used correspondingly; or, when the DRS is started When the start position is an even subframe, and the DRS is simultaneously mapped and transmitted in the odd subframe and the even subframe configuration, the DRS structure including the odd subframe and the even subframe manner in the above three manners is used correspondingly.
  • Mode 5 which partially defines the starting position of the DRS, only selects the combination of the configuration manners of the two DRS structures using the above three methods. For example, when the starting position of the defined DRS is an odd subframe or an even subframe, and one DRS burst structure is not simultaneously mapped in two subframes of the odd subframe and the even subframe, only the odd subframe or the even subframe is mapped. A type of subframe in a sub-frame.
  • the starting position of the DRS is not limited. Based on the starting position selection of the current DRS transmission, the configuration of the DRS structure of any of the above three methods may be used. That is, the starting position of the DRS may be an odd subframe or an even subframe, and one DRS structure mapping may also be mapped only in an odd subframe or an even subframe, or may be simultaneously mapped in an odd subframe and an even subframe.
  • the configuring the DRS sending pattern includes: When the initial OFDM symbol occupied by the DRS burst is an odd symbol or an even symbol, the transmission mode corresponding to the odd symbol or the even symbol is adopted.
  • the configuration manner in which the initial OFDM symbol occupied by the DRS burst is an odd symbol or an even symbol includes the following methods:
  • the odd/even OFDM symbols respectively correspond to different PSS/SSS, and the initial OFDM symbol parity occupied by the DRS burst is different according to the PSS/SSS mapping corresponding to the initial OFDM symbol parity.
  • the PSS is also mapped when the starting OFDM symbol of the DRS burst is an even OFDM symbol; similarly, when the odd OFDM symbol is mapped to PSS, when the DRS is bursting
  • the PSS is also mapped when the originating OFDM symbol is an odd OFDM symbol. This mode can maintain the uniformity of parity OFDM symbol mapping.
  • Maintaining uniformity may enable the UE to retrieve the PSS/SSS correspondingly based on the parity attributes of the received subframe. Therefore, the PSS or SSS corresponding to the odd/even subframes in different cases is not changed because the parity attributes of the initial subframes are different, thereby bringing about detection complexity.
  • Mode 2 When the DRS burst is composed of at least two OFDM symbols, the DRS burst is configured with an odd OFDM symbol or an even OFDM symbol as a starting position.
  • the preset structure B configured with the odd OFDM symbol as a starting position is taken as an example.
  • the DRS burst is configured according to the preset structure B. Send and send.
  • the DRS when the start position of the DRS burst is an even OFDM symbol, the DRS is configured to remove the part of the odd OFDM symbol of the preset structure B, and only retain the pre- Let the even OFDM symbol portion of the structure B and the portion after the even OFDM symbol; or, the portion of the even OFDM symbol of the preset structure B as a starting position, before the even OFDM symbol of the preset structure B
  • the odd OFDM symbol portion is configured to the end of this DRS burst.
  • Mode 3 The DRS structures of the odd OFDM symbols and the even OFDM symbols are respectively configured.
  • a primary DRS burst consists of a DRS structure of at least one OFDM symbol. Mapping a pre-configured DRS structure of the odd OFDM symbol when the starting position of the DRS burst is an odd OFDM symbol; mapping the pre-configured even OFDM symbol when the starting position of the DRS burst is an even OFDM symbol. This method provides better flexibility and can be transmitted without being restricted by the parity attribute of the starting subframe.
  • the configuration of the DRS may also select a combination of at least one of the above three modes.
  • Further implementation includes:
  • the starting position of the DRS is defined, so that only the configuration of one of the above three methods is used before the configuration of the DRS is changed in different time slots.
  • the DRS structure corresponding to the odd OFDM symbol configuration manner in the foregoing three manners is used; or, when DRS The starting position is an even OFDM symbol, and the DRS is only mapped in the even OFDM symbol configuration transmission, and then the DRS structure corresponding to the even OFDM symbol configuration manner in the above three manners is used; or when the starting position is even OFDM And when the DRS is simultaneously mapped and transmitted in the even OFDM symbol and the odd OFDM symbol configuration, the DRS structure including the even OFDM symbol and the odd OFDM symbol configuration manner in the above three manners is used correspondingly; or, when the DRS is started The start position is an even OFDM symbol, and the DRS is simultaneously mapped in the odd OFDM symbol and the even OFDM symbol configuration transmission, and the DRS structure including the odd OFDM symbol and the even OFDM symbol configuration manner in the above three manners is used correspondingly.
  • Mode 5 which partially defines the starting position of the DRS, only uses the above three methods to combine the configuration of the two DRS structures. For example, if the starting position of the defined DRS is an odd OFDM symbol or an even OFDM symbol, and one DRS burst structure is not simultaneously mapped in the odd OFDM symbol and the even OFDM symbol, only the odd OFDM symbol or the even OFDM symbol is mapped. A class of OFDM symbols.
  • the starting position of the DRS is not limited. Based on the starting position selection of the current DRS transmission, the configuration of the DRS structure of any of the above three methods may be used. That is, the starting position of the DRS may be an odd OFDM symbol or an even OFDM symbol, and one DRS structure mapping may also be mapped only to one type of OFDM symbols in an odd OFDM symbol or an even OFDM symbol, or may be simultaneously mapped to an odd OFDM symbol and Even OFDM symbol.
  • FIG. 6 is a schematic diagram of a fifth DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 6, this example is a schematic diagram of an initial OFDM symbol occupied by the DRS being an odd symbol, that is, the DRS is occupied.
  • the initial OFDM symbol is symbol 5; in the present illustration, the DRS is composed of an SSS structure.
  • FIG. 7 is a schematic diagram of a sixth DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 7, this example is a schematic diagram of an initial OFDM symbol occupied by the DRS as an even symbol, that is, the DRS is occupied.
  • the initial OFDM symbol is symbol 4; in the present illustration, the DRS is composed of a CRS structure.
  • the configuring the DRS sending pattern includes: configuring the DRS and/or the reserved signal according to a preset rule.
  • the DRS and/or the reserved signal are configured according to a preset rule, including the following methods:
  • Mode 1 When the first condition is met, the configured DRS transmission pattern includes only the DRS, and does not include the reserved signal.
  • the DRS is transmitted when the LBT successfully starts to occupy.
  • the starting position of the DRS is an OFDM symbol edge
  • the following manners may be adopted: 1. controlling the DRS burst structure translation to be performed with the Initial OFDM symbol alignment; 2. Controlling the DRS burst structure and the defined OFDM symbol as the starting transmission position, intercepting the remainder of the DRS burst structure after the start of the starting OFDM symbol.
  • the DRS that retains part of the burst structure can still be measured.
  • mapping start point of the DRS burst structure is the symbol n (n>0)
  • the starting point of the carrier occupancy is the symbol n+1
  • the component corresponding to the symbol n of the DRS structure is removed, and only the symbol n+1 and subsequent components in the DRS structure are transmitted.
  • the following control manners may be adopted: 1. Limiting the LBT of the DRS; preferably, performing LBT before the edge of the OFDM symbol, and completing the edge at the edge of the OFDM symbol
  • the LBT process can start occupying at the edge of the OFDM symbol if the LBT preemption succeeds.
  • the LBT of the frame-based equipment (FBE) is configured, and the CCA window of the LBT is configured before the edge of the OFDM symbol. If the CCA successfully occupies resources, the OFDM symbol can start to occupy resources. Sending the DRS signal.
  • the LBT of the load-based equipment (LBE) the end position of the LBT process is limited to the edge of the OFDM symbol, and if the LBT process successfully occupies resources, the resource may start to occupy resources at the OFDM symbol.
  • transmitting the DRS signal 2. when a starting position of the DRS burst is in the middle of an i-th (i>0) OFDM symbol (eg, the DRS burst is divided by the i-th OFDM symbol) When the remaining length is L), then controlling the second half of the DRS burst structure on the i+1th OFDM symbol (ie, the portion of the DRS whose remaining length is L) is copied in the ith On OFDM symbols.
  • This method is equivalent to lengthening the cyclic prefix (CP) length on the ith ith OFDM; or the CP length of the i+1th OFDM symbol is lengthened to be extended to the occupied starting point of the nth OFDM symbol.
  • CP cyclic prefix
  • the starting position of the DRS when the starting position of the DRS is in the middle of an OFDM symbol, it indicates that the DRS occupies an application scenario of a non-complete OFDM symbol.
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the DRS and the reserved signal are independent signals.
  • the DRS and the reserved signal included in the DRS transmission pattern include the following application scenarios:
  • the reserved signal is configured when the occupied start position is a non-complete OFDM symbol, that is, when the occupied start position is in the middle of the OFDM symbol, the reserved signal is configured. Specifically, the configuration reservation signal occupies the non-complete OFDM symbol, and the DRS is configured and sent at the first complete OFDM symbol.
  • This method can transmit DRS with as many resources as possible to better perform DRS measurement.
  • Scenario 2 At least the reserved signal of the T (T>0) duration is sent, so that the end position of the reserved signal of the T duration is an OFDM symbol edge, and then the DRS is configured and sent, that is, the transmission is started by using a complete OFDM symbol. DRS.
  • This method can use the reserved signal to obtain better initial synchronization, automatic gain control (AGC), etc., to better perform DRS measurement.
  • AGC automatic gain control
  • the DRS structure starting OFDM symbol is defined on a limited at least one OFDM symbol; the configuration reservation signal is continued from the occupied starting point to the at least one OFDM symbol edge defined by the DRS structure.
  • the DRS structure if there are multiple optional starting points defined by the DRS structure, if the occupied starting point and the position distance defined by the jth (j>0) DRS structures are greater than or equal to a predetermined time length t (t>0) And configuring the reserved signal to continue to the position defined by the jth DRS structure; if the occupied starting point and the positional distance defined by the jth DRS structure are less than the predetermined time length t, configuring the reserved signal to continue to the first j+1 positions defined by the DRS structure.
  • a reserved signal of a certain duration can be guaranteed, and the reserved signal can be used to obtain a better initial synchronization, AGC, etc., to better perform DRS measurement.
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the reserved signal is a component of the DRS.
  • the reserved signal component in the DRS may be selected for channel resource reservation, which may include the following scenarios:
  • the reserved signal component in the DRS is configured when the occupied start position is a non-complete OFDM symbol, that is, the reserved signal component in the DRS is used to occupy the non-complete OFDM symbol, and the first complete OFDM symbol is configured. And send DRS. This way can be as many resources as possible The DRS signal is sent for better DRS measurements.
  • Scenario 2 At least the reserved signal component in the DRS of the T duration is transmitted, so that the end position of the reserved signal component in the D duration of the T duration is an OFDM symbol edge, and then the DRS is configured and transmitted.
  • a better initial synchronization, AGC, etc. can be obtained by using the reserved signal component in the DRS to better perform DRS measurement.
  • the DRS structure starting OFDM symbol is defined on a limited at least one OFDM symbol; the reserved signal component in the DRS continues from the occupied starting point to the at least one OFDM symbol edge defined by the DRS structure.
  • the reservation in the DRS is configured.
  • the signal component continues to a position defined by the jth DRS structure; if the occupied starting point and the positional distance defined by the jth DRS structure are less than the predetermined duration T, then the reserved signal component in the DRS is configured to continue to j+1 positions defined by the DRS structure. In this way, a reserved signal of a certain duration can be guaranteed, and a better initial synchronization, AGC, etc. can be obtained by using the reserved signal component in the DRS to better perform DRS measurement.
  • the configuring the DRS transmission pattern includes: configuring the DRS to occupy the system bandwidth in the frequency domain according to the first preset configuration manner;
  • the DRS configured to occupy the system bandwidth in the frequency domain according to the first preset configuration manner includes:
  • Different bandwidths are respectively configured with DRS frequency domains according to preset rules; or,
  • the preset RBs in the intermediate frequency band of the frequency domain are configured with a conventional PSS/SSS structure, and the RBs on both sides of the preset RB configure other signals according to a preset configuration manner.
  • the configuring the DRS frequency domain to occupy the system bandwidth includes the following methods:
  • Method 1 According to the preset unit DRS frequency domain pattern (such as 5MHz DRS frequency domain pattern) System bandwidth DRS frequency domain pattern configuration;
  • DRS frequency domain pattern such as 5MHz DRS frequency domain pattern
  • System bandwidth DRS frequency domain pattern configuration
  • Mode 3 Configuring a conventional PSS/SSS structure in a preset RB of the intermediate frequency band of the frequency domain, and configuring, by the RBs on the two sides of the preset RB, other signals according to a preset configuration manner;
  • the method for configuring the DRS frequency domain pattern of the mode 1 and the mode 2 includes: configuring a regular PSS/SSS in a preset RB of the intermediate frequency band in the frequency domain, and configuring at least one RB on the two sides of the preset RB according to a preset configuration manner. PSS/SSS copy.
  • the DRS frequency domain pattern is configured to repeat according to a preset 5 MHz basic bandwidth DRS pattern.
  • the 20MHz system bandwidth its DRS frequency domain pattern is composed of four 5MHz baseband DRS frequency domain patterns.
  • the configuration manner of the reference signal composed of the DRS in the frequency domain of 5 MHz may include: for the PSS and SSS components in the DRS, first, the middle 6 resource blocks (RBs) of the 5 MHz frequency domain are configured with a conventional PSS/SSS, A PSS/SSS replica is separately configured based on the RBs on both sides of the middle 6 RBs.
  • the manner in which the RBs on the two sides are respectively configured with one PSS/SSS copy includes: 1.
  • the RBs on the two sides are symmetrically placed on the PSS/SSS replica, that is, the DRS frequency domain pattern is symmetric; 2.
  • the RBs on the two sides are
  • the sequence used for the configured PSS/SSS copy is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copies of the RBs placed on the two sides is the middle 6 RB configurations.
  • Deformation of the sequence used by the PSS/SSS the deformation is not included in the range of the conventional PSS/SSS, to minimize the confusion caused by the UE detecting the conventional PSS/SSS; 3.
  • the RBs on the two sides may select an RB occupying the edge of the 5 MHz bandwidth, and at least one RB is spared between the RBs configured with PSS/SSS in the middle, so as to occupy a bandwidth of 5 MHz as much as possible; or, adjacent to the intermediate configuration 6 RBs with regular PSS/SSS begin to configure the PSS/SSS copy, free of other RB, this can minimize interference to adjacent bandwidths; or, edge vacant parts RB, such as 1 RB free, to reduce the sideband effect.
  • the configuration of the DRS frequency domain image in the 5 MHz bandwidth may be: for the PSS and SSS components in the DRS, first, the middle 6 RBs in the 5 MHz frequency domain are configured with conventional PSS/SSS, and the RBs on both sides are respectively configured one. PSS/SSS copy. This mode can be specifically referred to the above description, and details are not described herein again.
  • the configuration of the DRS frequency domain image in the 10 MHz bandwidth may be: For the PSS and SSS components in the DRS, first, the middle 6 RBs in the 10 MHz frequency domain are configured with the regular PSS/SSS. The RBs on both sides are respectively configured with at least one copy of the PSS/SSS. among them,
  • the method for configuring one PSS/SSS copy for each RB on both sides includes the following: 1.
  • the RBs on both sides are symmetrically placed on the PSS/SSS copy, that is, the DRS frequency domain pattern is symmetric; 2.
  • the two The sequence of the PSS/SSS copy of the side RB configuration is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copy of the RB placed on both sides is the middle 6
  • Deformation of the sequence used by the PSS/SSS of the RB configuration the deformation is not included in the range of the conventional PSS/SSS, so as to minimize the confusion caused by the UE detecting the conventional PSS/SSS;
  • the PSS/SSS copy of the RB configuration of the side may select an RB occupying the edge of the 10 MHz bandwidth, and at least one RB is spared between the RBs configured with PSS/SSS in the middle, so as to
  • the method for configuring two PSS/SSS copies on both sides includes the following: 1.
  • the RBs on both sides are symmetrically placed on the PSS/SSS copy, that is, the DRS frequency domain pattern is symmetric; 2.
  • the two sides are
  • the sequence of the PSS/SSS copy of the RB configuration is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence of the PSS/SSS copies of the RBs placed on the two sides is the middle 6
  • Deformation of the sequence used by the PSS/SSS of the RB configuration the deformation is not included in the range of the conventional PSS/SSS, so as to minimize the confusion caused by the UE detecting the conventional PSS/SSS;
  • the PSS/SSS copy of the RB configuration may select an RB occupying the edge of the 10 MHz bandwidth, and at least one RB may be spared between the RBs configured with PSS/SSS in the middle, so as to occupy
  • the two PSS/SSS copies one of which is configured at the edge of the system bandwidth, as one of the embodiments may spare part of the RB, such as 1 RB; another PSS /SSS copy configuration in center PSS/SSS with edge PSS/SSS He said intermediate position in this manner may be uniformly arranged as PSS / SSS replica, a signal occupying a more uniform, but also useful for measuring the uniformity of the frequency domain samples.
  • the method for configuring three PSS/SSS copies on both sides includes the following: 1.
  • the RBs on both sides are symmetrically placed on the PSS/SSS copy, that is, the DRS frequency domain pattern is symmetric; 2.
  • the two sides are
  • the sequence used for the PSS/SSS copy of the RB configuration is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copies of the RBs placed on the two sides is the middle 6 RBs.
  • the PSS/SSS replica of the RB configuration may select an RB occupying the edge of the 10 MHz bandwidth, and at least one RB may be spared between the RBs configured with PSS/SSS in the middle, so as to occupy a bandwidth of 10 MHz as much as possible; or, adjacent to the middle
  • the 6 RBs configured with the normal PSS/SSS start to configure the PSS/SSS replicas, and spare other RBs, so as to minimize interference to adjacent bandwidths; or, the edge vacant portions RBs, for example, 1 free space RB to reduce the sideband effect; 4.
  • the 3 PSS/SSS replicas one PSS/SSS replica on the outer side is configured at the edge of the system bandwidth, and some RBs can be spared, for example, 1 RB, and the remaining two PSS/SSS replica configurations In the middle position of the center PSS/SSS and the edge PSS/SSS symmetry, this way can place several PSS/SSS copies as evenly as possible, occupying a more uniform signal, and also facilitating uniform measurement and sampling in the frequency domain.
  • the configuration of the DRS frequency domain image in the 15/20 MHz bandwidth may be: For the PSS and SSS components in the DRS, first, the middle 6 RBs in the 15/20 MHz frequency domain are configured with the conventional PSS/SSS. The RBs on both sides are respectively configured with at least one PSS/SSS copy.
  • the specific implementation manner is the same as the configuration of the DRS frequency domain image of the 10 MHz bandwidth, and details are not described herein again.
  • FIG. 8 is a schematic diagram of a seventh DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 8, where R represents a CRS.
  • R represents a CRS.
  • the CRS or the CSI-RS may be a CRS/CSI-RS component in the DRS, and its constituent features are consistent with those on other OFDM symbols of the DRS. For example, the number of antenna ports is the same and the sequence used is the same.
  • the configuring the DRS sending pattern includes: configuring, according to the second preset manner, that the DRS is sent at the same time or different from the user data;
  • the sending, by the second preset manner, the DRS and the user data are sent at the same time or different times, including:
  • the DRS is configured to be sent simultaneously or not simultaneously with the user data;
  • the DRS is configured to be sent simultaneously or not simultaneously with the user data.
  • the configuring the DRS is sent simultaneously or not simultaneously with user data, including the following Several scenarios:
  • Scenario 1 The scenario in which the DRS transmission pattern in the first preset time domain is inconsistent with the DRS transmission pattern in the second preset time domain, that is, the time domain in the T1 duration and the time domain in the T2 duration, the DRS is sent. Scenes with inconsistent patterns; where T1 and T2 are both greater than zero.
  • This scenario includes the following implementations:
  • Embodiment 1 When the DRS is sent together with the user data, only the RBs of the system bandwidth center can be configured to send the PSS/SSS, and the RBs on the two sides do not send the PSS/SSS copy; wherein the RBs on the two sides can be configured to be configured to send. User data.
  • Embodiment 2 When the DRS is transmitted together with the user data, only the RB of the system bandwidth center may be configured to transmit the PSS/SSS, and the RBs on both sides may not send the PSS/SSS copy; and the CRS/CSI-RS in the DRS component is transmitted. Due to the frequency domain sparse occupancy, the REs occupied by the reference signals on the OFDM symbols punct the data: 1. When the data is rate matched, the RE occupied by the reference signal is considered to be an unavailable RE; 2. When the data is rate matched, it is considered The REs occupied by the reference signals are available REs, but the data corresponding to the REs are not removed when the data is mapped.
  • Embodiment 3 Configure a DRS burst with a short duration. For example, only one basic structure of the DRS is transmitted.
  • the DRS structure currently used by the UE may, for example, notify whether or not data is transmitted at the same time, or only select to notify the change of the DRS structure, and whether data is simultaneously transmitted transparent to the UE.
  • the DRS when the DRS is transmitted together with the user data, the DRS cannot be mapped to a resource element (RE, Resource Element) where the demodulation reference signal (DMRS) is located; and/or cannot be mapped to the transmitting physical broadcast channel (PBCH) ) The RE where it is located.
  • RE resource element
  • PBCH physical broadcast channel
  • Scenario 2 the DRS transmission pattern in the first preset time domain and the DRS in the second preset time domain The scene in which the patterns are consistent, that is, the time domain in the T1 duration and the time domain in the T2 duration, the scene in which the DRS transmission pattern is consistent.
  • the DRS is full of the entire system bandwidth of the OFDM symbol in which it is located.
  • only the RBs of the system bandwidth center may be configured to transmit PSS/SSS, and the RBs on both sides are not configured to send PSS/SSS replicas, and send CRS and/or CSI-RS in the DRS component. Since the CRS and/or CSI-RS components are sparsely occupied in the frequency domain, these RBs can still be configured to schedule transmission of user data.
  • the RBs on both sides adopt the extension mode of the PSS/SSS copy, that is, the RBs on both sides configure the PSS/SSS copy by using a preset rule, and only the spare RB can send the user data.
  • the RBs are not configured to transmit user data, or the REs occupied by the reference signals on the OFDM symbols punct data: 1.
  • the rate matching is considered to be unavailable RE; 2.
  • the data is rate matched, it is considered The REs occupied by the reference signals are available REs, but the data corresponding to the REs are not removed when the data is mapped.
  • the configuring the DRS transmission pattern includes: configuring the DRS to be a periodic or aperiodic transmission mode;
  • the configuration of the DRS is a periodic transmission mode, including: the DRS transmission pattern is in a static or semi-static configuration; and the semi-static configuration indicates that the DRS transmission pattern does not change within a preset period;
  • the configuring the DRS to be an aperiodic transmission mode includes: dynamically configuring a DRS transmission pattern, where the DRS is triggered based on dynamic signaling.
  • the periodic DRS has at least one feature that the DRS transmission pattern is in a static or semi-static configuration, that is, the DRS transmission pattern does not change within a preset time range.
  • the periodic transmission mode that is, the preset period (that is, the preset time range) allows a certain offset to be performed based on the pre-configuration, and the offset mode is predefined; the UE and other neighboring cell UEs may be notified to perform measurement.
  • the aperiodic DRS has at least one of the following features: DRS transmission pattern dynamic configuration, the DRS transmission pattern dynamic configuration, that is, the DRS transmission pattern changes in real time, or at the first
  • the preset preset time range is smaller than the preset preset time range, that is, the first preset time range is smaller than the preset period.
  • the aperiodic transmission mode is triggered by the dynamic aperiodic mode, and dynamic signaling is required. In consideration of the interaction delay requirement, it is preferably configured as a UE measurement of the service; therefore, as an implementation manner, only the serving UE is notified. Make measurements.
  • the aperiodic DRS is primarily configured for synchronization, AGC and/or channel state information measurements, and/or channel occupancy of the UEs it serves.
  • the structure of the aperiodic DRS is different from the structure of the periodic DRS.
  • the aperiodic DRS When the aperiodic DRS is used for channel state information measurement, if channel state information measurement is performed based on the CRS, the antenna port configuring the CRS component in the aperiodic DRS is consistent with the CRS conventionally used for channel state information measurement; if based on CSI- The RS performs channel state information measurement, and then the antenna port configuring the CSI-RS component in the aperiodic DRS is consistent with the CSI-RS conventionally used for channel state information measurement.
  • the base station aperiodicly triggers the aperiodic DRS, and the UE may perform channel state information measurement based on CSI-RS and/or CRS components in the aperiodic DRS.
  • the UE needs to be triggered to perform measurement, and the triggering manner may be: (1) explicit mode, which is notified by the physical layer control signaling. Preferably, it is a common control signaling, that is, can be simultaneously received by multiple UEs and simultaneously notify the multiple UEs; (2) implicitly, the aperiodic DRS defaults to the initial subframe of the occupation period, for example, the first or the first In two subframes, the UE performs measurements on the default subframe. Or, by default, k subframes before resource preemption occur, and the UE performs measurement on the k subframes.
  • the aperiodic DRS and the CSI-RS and/or CRS conventionally used for channel state information measurement appear in the same subframe and/or adjacent subframe, it may be processed as follows: (1) Simultaneous transmission, notifying the aperiodic DRS
  • the UE performs channel state information measurement based on the CSI-RS and/or the CRS component in the aperiodic DRS, and the UE can perform not only channel state information measurement but also the aperiodic measurement by using the aperiodic DRS.
  • Other information carried by the DRS; the UE not notifying the aperiodic DRS performs channel state information measurement based on CSI-RS and/or CRS conventionally used for channel information measurement.
  • the UE notifying the aperiodic DRS is not based on the non-circle
  • the CSI-RS and/or CRS components in the DRS perform channel state information measurement, but perform channel state information measurement based on the regular CSI-RS and/or CRS, and the UE obtains the measurement through the aperiodic DRS.
  • Other information carried by the aperiodic DRS; the UE not notifying the aperiodic DRS performs channel state information measurement based on CSI-RS and/or CRS conventionally used for channel information measurement.
  • the aperiodic DRS may adopt a periodic DRS structure, that is, the number of antenna ports of its CSI-RS and/or CRS components is small, and does not need to be consistent with the antenna ports of the conventional CSI-RS and/or CRS. (3) Not transmitting at the same time, only the regular CSI-RS and/or CRS are transmitted. Since the conventional CSI-RS and/or CRS can already satisfy the main channel state measurement and the like, the resource overhead of the aperiodic DRS can be reduced. However, the unique information carried by the non-periodic DRS cannot be transmitted and measured. (4) Not transmitting at the same time, only the aperiodic DRS is transmitted. The resource overhead of conventional CSI-RS and/or CRS can be reduced. However, it is necessary to notify the configuration of the aperiodic DRS to all UEs that need to be measured based on conventional CSI-RS and/or CRS, which will generate a certain signaling overhead.
  • Scenario 1 The aperiodic DRS is transmitted before the initial transmission of data, that is, part or all of the transmission of the DRS structure does not overlap with data transmission.
  • the P1 portion of the DRS can be used for channel occupation.
  • the P1 partial structure of the DRS satisfies the specification requirement of the claimed bandwidth in the time domain continuous and/or frequency domain occupied bandwidth.
  • the aperiodic DRS is sent at the end of the data transmission, that is, part or all of the transmission of the DRS structure does not overlap with the data transmission, and for the P2 part of the DRS that does not overlap, the P2 part structure of the DRS
  • the bandwidth occupied in the time domain continuous and / or frequency domain meets the specification requirements of the claimed bandwidth.
  • Scenario 2 The aperiodic DRS is sent in the middle of the data. This scenario includes the following implementations:
  • Embodiment 1 Part or all of the signal P3 of the aperiodic DRS is transmitted simultaneously with data, and the P3 part of the DRS and the data occupy different resources in the frequency domain.
  • the DRS The P3 part can occupy frequency domain resources that are not occupied by data, and this mode can also function as a channel.
  • the bandwidth occupied by the data transmission does not meet the requirements of the specification, and the P3 part of the DRS can be used to achieve the occupied bandwidth to meet the specification requirements.
  • FIG. 9 is a schematic diagram of an eighth DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 9, a part of the time slot resource T1 is not transmitted in the middle of the data structure, and is configured at the time.
  • the resource in which the slot resource T1 is located continuously occupies the aperiodic DRS, so as to achieve the purpose of channel occupation, the time slot resource T1 can be prevented from being preempted by other nodes.
  • the configuring the DRS transmission pattern includes: configuring a sounding reference signal (SRS) along with DRS transmission;
  • SRS sounding reference signal
  • the configuration SRS is accompanied by DRS transmission, including:
  • the SRS is configured to accompany the DRS transmission based on the signaling indication.
  • channel state information (CSI) of downlink (DL, Down Link) and uplink (UL, Up Link) can be obtained by using channel reciprocity, and the CSI is configured as an adjacent DL and / or UL's scheduling.
  • the carrier preemption of the UL is performed by a base station (eNB) to perform an LBT scenario.
  • eNB base station
  • the eNB performs carrier preemption based on the DRS transmission requirement.
  • the UE transmits the SRS to the base station at time T2 after the time T1 immediately after receiving the DRS.
  • UE user equipment
  • the SRS occupied bandwidth is at least 80% of the nominal system bandwidth.
  • T 0 represents the minimum allowable duration
  • T MAX represents the maximum allowable duration
  • Aperiodic DRS carrier preemption and transmission can be triggered. Preferably, only the UE of the serving cell is notified for the UE in the serving cell, and the UE of other neighboring cells may not be aware of the aperiodic DRS. Triggering aperiodic DRS transmission can be used for at least one of the following purposes: CSI measurement, synchronization measurement requirement, and SRS transmission requirement.
  • Two types of DRS periodic (or quasi-periodic) DRS, aperiodic DRS.
  • the periodic (or quasi-periodic) DRS is used for both the UE in the serving cell and the neighboring cell UE; the aperiodic DRS can be used only for the UE in the local cell.
  • the periodic (or quasi-periodic) DRS needs to inform the UE of the neighboring cell, while the non-periodic DRS only needs to inform the UE of the own cell.
  • the quasi-period DRS refers to a periodic manner, but each periodic point is a time window, and the DRS may have a certain offset around the time window, and/or some of the periods may not be transmitted.
  • the specific indication manner may be: each time the control information indicates whether to send; or, the semi-static configuration changes the transmission mode: a mode in which the SRS is transmitted or a mode in which the SRS is not transmitted.
  • the trigger transmission time is preferably an aperiodic SRS.
  • the occupied time domain resource is transmitted in the last OFDM symbol of one subframe.
  • the processing manner may be:
  • the eNB indicates not to transmit the DRS and/or SRS to avoid conflict with user data; or, the eNB Instructing not to send user data, avoiding user data conflict with DRS and/or SRS;
  • the DRS and/or SRS are allowed to be transmitted.
  • the DRS and/or the SRS may be configured to be transmitted in the last OFDM symbol, and only the last OFDM symbol is not configured to transmit the user data, thereby avoiding the user data and the DRS. And / or SRS conflicts.
  • DRS and/or SRS may be transmitted in multiple OFDM symbols after the previous subframe of one UL subframe, or in the next one of the UL subframes
  • the plurality of OFDM symbols following the subframe transmit DRS and/or SRS; of course, the last OFDM symbol of the UL subframe may also be included; preferably, the DRS and/or SRS are configured in the last one of the subframes
  • the OFDM symbol transmits an SRS.
  • the relationship between the DRS and/or the SRS for the DL and the user data may be transmitted in the UpPTS or in the first N1 OFDM symbols occupying one subframe, and N1 is a positive integer.
  • N2 OFDM symbols are transmitted in the control domain of one subframe, N2 is a positive integer, and N2 is less than or equal to N1, and the number of OFDM symbols is not more than 3.
  • the first N3 OFDM symbols of one DL subframe are generally a control domain, N3 is a positive integer, and N3 is greater than N2, and user data is not mapped.
  • the UE performs a scenario in which the LBT preempts the UL carrier resource.
  • the UE performs the LBT at the time when the DRS may occur. Since the base station of the LSA (Licensed-Assisted Access) has occupied and transmitted the DRS, the probability that the UE immediately succeeds in preempting the DRS transmission time is high.
  • LSA Licensed-Assisted Access
  • the eNB triggers/configures non-periodic DRS measurements, and the UE performs LBT at the configured aperiodic DRS end position to preempt and transmit the SRS.
  • the beneficial effect of this embodiment is that the random occupation of the carriers makes the CSI-RS transmission also random. This makes the measurement feedback of CSI unable to meet the timeliness of scheduling requirements in time.
  • the uplink and downlink CSI can be obtained in a timely manner based on SRS.
  • This method is also beneficial to solve the problem that the DRS occupation time may be less than 1 ms; the CSI can be obtained in time.
  • the configuring the DRS transmission pattern includes: configuring a broadcast channel to be accompanied by DRS transmission;
  • the configuration broadcast channel is accompanied by DRS transmission, including:
  • the configuration broadcast channel is accompanied by periodic DRS transmission, and the aperiodic DRS is not accompanied by the broadcast channel;
  • the number of antenna ports corresponding to the broadcast channel is the same as the number of antenna ports corresponding to the CRS component in the DRS; or
  • the configuration broadcast channel is transmitted on at least one of the predefined groups of carriers, and the other carriers in the carrier are not configured to transmit the broadcast channel.
  • the configuring, by the third preset manner, the broadcast channel is accompanied by DRS transmission, including at least one of the following manners:
  • the other frequency resources of the system bandwidth preferably map at least one RS component of the DRS;
  • the broadcast channel is configured on a preset number of RBs in a carrier center, for example, configured on six RBs in the middle of the carrier;
  • the other frequency resources of the system bandwidth preferably map at least one RS component of the DRS, the RS component comprising a CSI-RS and/or a CRS.
  • the starting OFDM symbol of the broadcast channel is the same as the first group of PSS/SSS starting OFDM symbols of the DRS component; or the starting OFDM symbol of the broadcast channel is in the first group On the OFDM symbol after PSS/SSS. It is convenient for the UE to select the DRS-based PSS/SSS component to obtain synchronization and ID information to facilitate identification and demodulation of the broadcast channel.
  • the number of antenna ports corresponding to the broadcast channel is the same as the number of antenna ports corresponding to the CRS component in the DRS; preferably, the number of the ports is 1.
  • the number of antenna ports corresponding to the broadcast channel is the same as the number of antenna ports corresponding to the CRS component of the DRS, which facilitates demodulation based on the CRS component.
  • the broadcast channel configuration is transmitted on the OFDM symbol in which the CRS component in the DRS is located, and/or on the OFDM symbol adjacent to the CRS, to facilitate the UE to demodulate the broadcast channel based on the CRS.
  • the configuration broadcast channel is transmitted on at least one of the predefined carrier groups, and the other carriers other than the at least one carrier are not configured to transmit the broadcast channel.
  • the predefined carrier group CG consists of N carriers.
  • the carrier C1 is configured to transmit the broadcast channel, and the other N-1 carriers in the carrier group CG do not transmit the broadcast channel.
  • the sending, according to the configured DRS sending pattern, the DRS includes: controlling, according to the configured DRS sending pattern, the periodic DRS and/or the aperiodic DRS according to the LBT according to the third preset manner; or, according to the first The four preset mode control period DRS and/or the aperiodic DRS are not transmitted based on LBT.
  • Embodiment 1 Periodic DRS is transmitted based on LBT, and aperiodic DRS is not transmitted based on LBT.
  • the aperiodic DRS may be sent according to a short control information (SCS, Short Control Singnalling); and/or the aperiodic DRS is accompanied by user data transmission, and there is no need to specifically perform LBT for the aperiodic DRS transmission.
  • SCS Short Control Singnalling
  • This mode facilitates timely trigger transmission of aperiodic DRS, thereby facilitating timely measurement requirements based on the aperiodic DRS.
  • Embodiment 2 Both periodic DRS and aperiodic DRS are transmitted based on LBT. This mode mainly considers scenarios where the SCS mechanism is not supported.
  • Embodiment 3 Aperiodic DRS is transmitted based on LBT, and periodic DRS is not transmitted based on LBT.
  • the periodic DRS may be sent based on short control information (SCS); and/or the period
  • SCS short control information
  • the DRS is accompanied by user data transmission, and there is no need to specifically carry out a unique LBT for the periodic DRS transmission.
  • the method mainly utilizes the feature that the period of the periodic DRS transmission is long and the duration of each burst is also short, and the duration of the transmission occupation can be controlled within the delay requirement range of the SCS.
  • Embodiment 4 The foregoing Embodiments 1 to 3 are mixed and transmitted in different manners to provide more flexibility and obtain more transmission opportunities.
  • Embodiment 5 The LBT implementation method of the DRS includes: (1) a contention window end position is set at a time point of pre-configured DRS transmission; or (2) a random backoff value ends in a nearby pre-configured DRS candidate transmission. Time point. This method can improve the priority of DRS preemption and improve the transmission opportunity.
  • the synchronization signal of the unlicensed carrier is transmitted, and the unlicensed carrier can be satisfied.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to perform the sending of the synchronization signal of the unlicensed carrier according to the embodiment of the present invention. method.
  • the embodiment of the invention further provides a base station.
  • 11 is a schematic structural diagram of a base station according to Embodiment 2 of the present invention. As shown in FIG. 11, the base station includes: a configuration unit 21 and a sending unit 22;
  • the configuration unit 21 is configured to configure a DRS transmission pattern;
  • the DRS transmission pattern includes at least one of the following parameters: a time parameter, a frequency domain location, and a component parameter;
  • the sending unit 22 is configured to send the DRS based on the configured DRS transmission pattern to make the DRS periodic and/or persistent, or non-periodic and/or persistent.
  • the configuration unit 21 is configured to: when the DRS is in the first half of the radio frame, configure the DRS to adopt a reference signal structure based on the first preset subframe. And/or, when the DRS is in the second half of the radio frame, configuring the DRS is configured by using a reference signal structure based on the second preset subframe.
  • the first preset subframe may be a subframe 0; and the second preset subframe may be a subframe 5.
  • the present embodiment has the following preferred embodiments:
  • Embodiment 1 The DRS transmitted in the subframe 0 to the subframe 4 in the radio frame is configured by using a reference signal (RS) structure based on the subframe 0; correspondingly, the DRS transmitted in the subframe 5 to the subframe 9 in the radio frame is adopted.
  • the RS structure is constructed based on the subframe 5. As shown in FIG. 2, when the DRS is in the subframe 2, the DRS is configured by using the RS structure of the subframe 0; correspondingly, when the DRS is in the subframe 6, the DRS adopts the RS of the subframe 5. Structure.
  • Embodiment 2 When TDD is adopted and the DRS is configured based on the PSS/SSS structure, the DRS transmitted in the subframe 0 to the subframe 4 in one radio frame is composed of the SSS of the subframe 0 and the PSS structure of the subframe 1; correspondingly, The DRS transmitted in subframe 5 to subframe 9 in one radio frame is composed of the SSS of subframe 5 and the PSS structure of subframe 6.
  • Embodiment 3 When FDD is adopted and the DRS is configured based on the PSS/SSS structure, the DRS transmitted in the subframe 0 to the subframe 4 in one radio frame is configured by the PSS/SSS structure of the subframe 0; correspondingly, in a wireless The DRS transmitted in subframe 5 to subframe 9 in the frame is constructed using the PSS/SSS structure of subframe 5.
  • Embodiment 4 The DRS transmitted in the subframe 1 to the subframe 4 in the radio frame adopts a variant based on the RS sequence corresponding to the subframe 0; the DRS transmitted in the subframe 6 to the subframe 9 adopts the RS sequence corresponding to the subframe 5
  • the deformation may be an RS sequence rotation.
  • the subframe 1 to the subframe 4 are sequentially rotated by an offset with respect to the RS sequence of the subframe 0; correspondingly, the subframe 6 to the subframe 9 are sequentially rotated by an offset with respect to the RS sequence of the subframe 5.
  • the relationship between the RS sequence and the RS sequence of the subframe 0 can be used to determine the front and rear fields of one radio frame, and different subframes can be distinguished by different deformation characteristics (such as the amount of rotation) of different subframes.
  • deformation characteristics such as the amount of rotation
  • the DRS in the first half of the radio frame (ie, the subframe 0 to the subframe 4) is configured by using the RS structure based on the subframe 0, and is located in the second half of the radio frame (ie, the subframe 5 to the subframe 9).
  • the DRS is constructed using a subframe structure based on subframe 5.
  • 3 is a schematic diagram of a second DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG.
  • the DRS when the DRS is both on the subframe 4 and also on the subframe 5, that is, the DRS is simultaneously
  • the DRS is in the first half of the radio frame (ie, in subframe 4).
  • the part is configured by using the RS structure of the subframe 0.
  • the part of the DRS that is in the second half of the radio frame (that is, in the subframe 5) is configured by using the RS structure of the subframe 5.
  • This mode can maintain the uniformity of different mapping scenarios.
  • the sequence in the DRS is generated in two categories.
  • the user equipment (UE) also needs to detect two types separately.
  • the DRS burst structure When the starting subframe of the DRS burst structure is in the first half of the radio frame (ie, subframe 0 to subframe 4), the DRS burst structure also includes the second half of the radio frame ( That is, subframe 5 to subframe 9), in this scenario, the transmitted DRS is constructed using a subframe structure based on subframe 0. Similarly, when the starting subframe of the DRS burst is in the second half of the radio frame (subframe 5 to subframe 9), the DRS burst structure simultaneously includes the first half of the next radio frame of the radio frame. In this scenario, the transmitted DRS is constructed using a subframe structure based on subframe 5.
  • FIG. 4 is a schematic diagram of a third DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 4, when the start position of the DRS is in subframe 4 and includes subframe 5, that is, the DRS is simultaneously When the upper field and the lower field of the radio frame are included, the DRS is configured by using an RS structure based on subframe 0. This mode can maintain only one type of RS sequence for one DRS burst.
  • the configuration unit 21 is configured to configure the DRS in the DRS.
  • the DRS time window has a pre-configured time domain location and time domain length.
  • the start position and the end position of one DRS burst are within one DRS time window.
  • the DRS burst may select a fixed or variable time start point in the DRS time window as an initial transmission point, and an end point does not exceed the DRS time window; the initial transmission point may be based on LBT
  • the result of the execution may also be the initial sending point configured based on the coordinated requirements.
  • the DRS time window adopts a preset configuration parameter;
  • the preset configuration parameter may be a configuration parameter of a DRS burst in the LTE R12 version, and the duration of the DRS time window in the FDD system may be 1 to 5 milliseconds. (ms); the duration of the DRS time window in the TDD system may be 2 to 5 ms.
  • the DRS parameter in the prior art may also be used.
  • the DRS parameter refers to the duration of a DRS burst of R12 in the prior art, and now refers to a time window range of a DRS burst that may occur; preemption and transmission. Limiting to this range also favors the scope of the UE blind detection, rather than any location.
  • the processing manner may be referred to the processing manner listed in the first embodiment, which is not specifically described in this embodiment.
  • the configuration unit 21 is configured to adopt a configuration manner corresponding to the odd subframe or the even subframe when the initial subframe occupied by the DRS is an odd subframe or an even subframe;
  • the configuration manner corresponding to the odd subframe or the even subframe includes: a PSS/SSS mapping corresponding to a parity of the starting subframe occupied by the DRS according to a parity of the starting subframe;
  • the DRS when the DRS is composed of at least two subframes, configuring the DRS with the odd subframe or the even subframe as the starting subframe;
  • the DRS is composed of at least one DRS structure.
  • the configuration manner in which the initial subframe occupied by the DRS is an odd subframe or an even subframe includes the following methods:
  • Mode 1 For the TDD structure, when the PSS and the SSS are respectively mapped to the SPS and the SSS, the PSS/SSS mapping corresponding to the parity of the starting subframe is used for the starting subframe occupied by the DRS burst. .
  • the mapping is PSS; similarly, when the original subframe is mapped to the PSS, When the starting subframe occupied by the DRS burst is an odd subframe, it is mapped to PSS. This mode can maintain the uniformity of parity subframe mapping.
  • Maintaining uniformity may enable the UE to retrieve the PSS/SSS correspondingly based on the parity attributes of the received subframe. Therefore, the PSS or SSS corresponding to the odd/even subframes in different cases is not changed because the parity attributes of the initial subframes are different, thereby bringing about detection complexity.
  • Mode 2 When the DRS burst is composed of at least two subframes, the DRS burst is configured with the odd subframe or the even subframe as the starting subframe.
  • the preset structure A configured with the odd subframe as the initial subframe is taken as an example.
  • the configuration is configured according to the preset structure A. The DRS bursts and sends.
  • the DRS when the start subframe of the DRS burst is an even subframe, the DRS is configured to remove the part of the odd subframe of the preset structure A, and only retain the a portion of the even subframe of the preset structure A and a portion after the even subframe; or, a portion of the even subframe of the preset structure A is used as a starting subframe, and the preset structure A
  • the odd subframe portion before the subframe is configured to the end of the DRS burst.
  • Manner 3 The DRS structures of the odd sub-frames and the even sub-frames are respectively configured; the primary DRS burst is composed of at least one DRS structure.
  • mapping a DRS structure corresponding to the pre-configured odd subframe mapping the pre-configured even when the starting position of the DRS burst is an even subframe.
  • the configuration of the DRS may also select a combination of at least one of the above three modes.
  • Further implementation includes:
  • the starting position of the DRS is defined, so that only the configuration of one of the above three methods is used before the configuration of the DRS is changed in different time slots.
  • the DRS structure corresponding to the odd subframe configuration manner in the foregoing three manners is used; or, when DRS If the starting position is an even subframe, and the DRS is only mapped in the even subframe configuration transmission, the DRS structure of the even subframe mode in the above three manners is used correspondingly; or, when the starting position of the DRS is even When the subframe is mapped and the DRS is simultaneously mapped and transmitted in the even subframe and the odd subframe configuration, the DRS structure including the even subframe and the odd subframe mode in the above three manners is used correspondingly; or, when the DRS is started When the start position is an even subframe, and the DRS is simultaneously mapped and transmitted in the odd subframe and the even subframe configuration, the DRS structure including the odd subframe and the even subframe manner in the above three manners is used correspondingly.
  • Mode 5 which partially defines the starting position of the DRS, only selects the combination of the configuration manners of the two DRS structures using the above three methods. For example, when the starting position of the defined DRS is an odd subframe or an even subframe, and one DRS burst structure is not simultaneously mapped in two subframes of the odd subframe and the even subframe, only the odd subframe or the even subframe is mapped. A type of subframe in a sub-frame.
  • the starting position of the DRS is not limited. Based on the starting position selection of the current DRS transmission, the configuration of the DRS structure of any of the above three methods may be used. That is, the starting position of the DRS may be an odd subframe or an even subframe, and one DRS structure mapping may also be mapped only in an odd subframe or an even subframe, or may be simultaneously mapped in an odd subframe and an even subframe.
  • the configuration unit 21 is configured to: when the initial orthogonal frequency division multiplexing OFDM symbol occupied by the DRS burst is configured as an odd symbol or an even symbol, the corresponding symbol or even symbol is used for sending. the way;
  • the sending manner corresponding to the odd symbol or the even symbol includes: DRS accounted for The parity of the starting OFDM symbol used is different according to the PSS/SSS mapping corresponding to the initial OFDM symbol parity;
  • the DRS when the DRS is composed of at least two OFDM symbols, configuring the DRS with an odd OFDM symbol or an even OFDM symbol as a starting position;
  • the DRS is composed of a DRS structure of at least one OFDM symbol.
  • the configuration manner in which the initial OFDM symbol occupied by the DRS burst is an odd symbol or an even symbol includes the following methods:
  • the odd/even OFDM symbols respectively correspond to different PSS/SSS, and the initial OFDM symbol parity occupied by the DRS burst is different according to the PSS/SSS mapping corresponding to the initial OFDM symbol parity.
  • the PSS is also mapped when the starting OFDM symbol of the DRS burst is an even OFDM symbol; similarly, when the odd OFDM symbol is mapped to PSS, when the DRS is bursting
  • the PSS is also mapped when the originating OFDM symbol is an odd OFDM symbol. This mode can maintain the uniformity of parity OFDM symbol mapping.
  • Maintaining uniformity may enable the UE to retrieve the PSS/SSS correspondingly based on the parity attributes of the received subframe. Therefore, the PSS or SSS corresponding to the odd/even subframes in different cases is not changed because the parity attributes of the initial subframes are different, thereby bringing about detection complexity.
  • Mode 2 When the DRS burst is composed of at least two OFDM symbols, the DRS burst is configured with an odd OFDM symbol or an even OFDM symbol as a starting position.
  • the preset structure B configured with the odd OFDM symbol as a starting position is taken as an example.
  • the DRS burst is configured according to the preset structure B. Send and send.
  • the DRS when the start position of the DRS burst is an even OFDM symbol, the DRS is configured to remove the part of the odd OFDM symbol of the preset structure B, and only retain the pre- Let the even OFDM symbol portion of the structure B and the portion after the even OFDM symbol; or, the portion of the even OFDM symbol of the preset structure B as a starting position, The odd OFDM symbol portion before the even OFDM symbol of the preset structure B is configured to the end portion of the current DRS burst.
  • This method adds a certain complexity to the above mode 1, it provides better flexibility.
  • the UE may perform detection according to the above rules according to the parity attribute of the structure A and the starting subframe.
  • Mode 3 The DRS structures of the odd OFDM symbols and the even OFDM symbols are respectively configured.
  • a primary DRS burst consists of a DRS structure of at least one OFDM symbol. Mapping a pre-configured DRS structure of the odd OFDM symbol when the starting position of the DRS burst is an odd OFDM symbol; mapping the pre-configured even OFDM symbol when the starting position of the DRS burst is an even OFDM symbol. This method provides better flexibility and can be transmitted without being restricted by the parity attribute of the starting subframe.
  • the configuration of the DRS may also select a combination of at least one of the above three modes.
  • Further implementation includes:
  • the starting position of the DRS is defined, so that only the configuration of one of the above three methods is used before the configuration of the DRS is changed in different time slots.
  • the DRS structure corresponding to the odd OFDM symbol configuration manner in the foregoing three manners is used; or, when DRS The starting position is an even OFDM symbol, and the DRS is only mapped in the even OFDM symbol configuration transmission, and then the DRS structure corresponding to the even OFDM symbol configuration manner in the above three manners is used; or when the starting position is even OFDM And when the DRS is simultaneously mapped and transmitted in the even OFDM symbol and the odd OFDM symbol configuration, the DRS structure including the even OFDM symbol and the odd OFDM symbol configuration manner in the above three manners is used correspondingly; or, when the DRS is started The start position is an even OFDM symbol, and the DRS is simultaneously mapped in the odd OFDM symbol and the even OFDM symbol configuration transmission, and the DRS structure including the odd OFDM symbol and the even OFDM symbol configuration manner in the above three manners is used correspondingly.
  • Mode 5 which partially defines the starting position of the DRS, only uses the above three methods.
  • a combination of the configuration of the DRS structure For example, if the starting position of the defined DRS is an odd OFDM symbol or an even OFDM symbol, and one DRS burst structure is not simultaneously mapped in the odd OFDM symbol and the even OFDM symbol, only the odd OFDM symbol or the even OFDM symbol is mapped.
  • a class of OFDM symbols For example, if the starting position of the defined DRS is an odd OFDM symbol or an even OFDM symbol, and one DRS burst structure is not simultaneously mapped in the odd OFDM symbol and the even OFDM symbol, only the odd OFDM symbol or the even OFDM symbol is mapped.
  • the starting position of the DRS is not limited. Based on the starting position selection of the current DRS transmission, the configuration of the DRS structure of any of the above three methods may be used. That is, the starting position of the DRS may be an odd OFDM symbol or an even OFDM symbol, and one DRS structure mapping may also be mapped only to one type of OFDM symbols in an odd OFDM symbol or an even OFDM symbol, or may be simultaneously mapped to an odd OFDM symbol and Even OFDM symbol.
  • the configuration unit 21 is configured to configure the DRS and/or the reserved signal according to a preset rule
  • the DRS and/or the reserved signal are configured according to a preset rule, including:
  • the configured DRS transmission pattern includes only DRS
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the DRS and the reserved signal are independent signals;
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the reserved signal is a component of the DRS.
  • the DRS and/or the reserved signal are configured according to a preset rule, including the following methods:
  • Mode 1 When the first condition is met, the configured DRS transmission pattern includes only the DRS, and does not include the reserved signal.
  • the DRS is transmitted when the LBT successfully starts to occupy.
  • the starting position of the DRS is an OFDM symbol edge
  • the following manners may be adopted: 1. controlling the DRS burst structure translation to be performed with the Initial OFDM symbol alignment; 2. Controlling the DRS burst structure and the defined OFDM symbol as the starting transmission position, intercepting the remainder of the DRS burst structure after the start of the starting OFDM symbol.
  • the DRS that retains part of the burst structure can still be measured.
  • mapping start point of the DRS burst structure is the symbol n and the starting point occupied by the carrier is the symbol n+1
  • the component corresponding to the symbol n of the DRS structure is removed, and only the symbol n in the DRS structure is transmitted. +1 and beyond.
  • Limiting the LBT of the DRS preferably, performing the LBT before the OFDM symbol, and after the LBT preemption succeeds, may be at the edge of the OFDM symbol Beginning to occupy, LBT of a frame structure based device (FBE); 2.
  • the starting position of the DRS when the starting position of the DRS is in the middle of an OFDM symbol, it indicates that the DRS occupies an application scenario of a non-complete OFDM symbol.
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the DRS and the reserved signal are independent signals.
  • the DRS and the reserved signal included in the DRS transmission pattern include the following application scenarios:
  • the reserved signal is configured when the occupied start position is a non-complete OFDM symbol, that is, when the occupied start position is in the middle of the OFDM symbol, the reserved signal is configured. Specifically, the configuration reservation signal occupies the non-complete OFDM symbol, and the DRS is configured and sent at the first complete OFDM symbol. This method can be sent with as many resources as possible DRS for better DRS measurements.
  • Scenario 2 At least the reserved signal of the T duration is transmitted, so that the end position of the reserved signal of the T duration is an OFDM symbol edge, and then the DRS is configured and transmitted, that is, the DRS is started to be transmitted through a complete OFDM symbol.
  • This method can use the reserved signal to obtain better initial synchronization, automatic gain control (AGC), etc., to better perform DRS measurement.
  • AGC automatic gain control
  • the DRS structure starting OFDM symbol is defined on a limited at least one OFDM symbol; the configuration reservation signal is continued from the occupied starting point to the at least one OFDM symbol edge defined by the DRS structure.
  • the configuration reservation signal continues to the The position defined by the jth DRS structure; if the occupied starting point and the positional distance defined by the jth DRS structure are less than the predetermined time length t, then the reserved signal is configured to continue to the position defined by the j+1th DRS structure. In this way, a reserved signal of a certain duration can be guaranteed, and the reserved signal can be used to obtain a better initial synchronization, AGC, etc., to better perform DRS measurement.
  • the configured DRS transmission pattern includes a DRS and a reserved signal; wherein the reserved signal is a component of the DRS.
  • the reserved signal component in the DRS may be selected for channel resource reservation, which may include the following scenarios:
  • Scenario 1 The reserved signal component in the DRS is configured when the occupied start position is a non-complete OFDM symbol, that is, the reserved signal component in the DRS is used to occupy the non-complete OFDM symbol, and the first complete OFDM symbol is configured. And send DRS.
  • This method can transmit DRS signals as much as possible to better perform DRS measurements.
  • Scenario 2 At least the reserved signal component in the DRS of the T duration is transmitted, so that the end position of the reserved signal component in the D duration of the T duration is an OFDM symbol edge, and then the DRS is configured and transmitted.
  • This method can obtain better initial synchronization and AGC by using the reserved signal component in DRS. Etc. for better DRS measurements.
  • the DRS structure starting OFDM symbol is defined on a limited at least one OFDM symbol; the reserved signal component in the DRS continues from the occupied starting point to the at least one OFDM symbol edge defined by the DRS structure.
  • the reservation in the DRS is configured.
  • the signal component continues to a position defined by the jth DRS structure; if the occupied starting point and the positional distance defined by the jth DRS structure are less than the predetermined duration T, then the reserved signal component in the DRS is configured to continue to j+1 positions defined by the DRS structure. In this way, a reserved signal of a certain duration can be guaranteed, and a better initial synchronization, AGC, etc. can be obtained by using the reserved signal component in the DRS to better perform DRS measurement.
  • the configuration unit 21 is configured to configure the DRS to occupy the system bandwidth in the frequency domain according to the first preset configuration manner, where the DRS is configured in the frequency domain according to the first preset configuration manner.
  • the system bandwidth is occupied by the DRS frequency domain pattern according to the preset unit DRS frequency domain pattern; or the different bandwidths are respectively configured according to preset rules; or the preset RB configuration in the frequency domain intermediate frequency band
  • the RBs on both sides of the preset RB configure other signals according to a preset configuration manner.
  • the configuring the DRS frequency domain to occupy the system bandwidth includes the following methods:
  • Method 1 Perform a system bandwidth DRS frequency domain pattern configuration according to a preset unit DRS frequency domain pattern (such as a 5 MHz DRS frequency domain pattern);
  • Method 2 Different bandwidths are respectively configured with DRS frequency domain patterns according to preset rules
  • Mode 3 Configuring a conventional PSS/SSS in a preset RB of the intermediate frequency band in the frequency domain, and configuring other signals on the two sides of the preset RB according to a preset configuration manner;
  • the mode of configuring the DRS frequency domain pattern of the mode 1 and the mode 2 includes: configuring a regular PSS/SSS in a preset RB of the intermediate frequency band in the frequency domain, and configuring the RBs on both sides of the preset RB according to a preset configuration. Configure at least one PSS/SSS copy.
  • the DRS frequency domain pattern is configured to repeat according to a preset 5 MHz basic bandwidth DRS pattern.
  • the 20MHz system bandwidth its DRS frequency domain pattern is composed of four 5MHz baseband DRS frequency domain patterns.
  • the configuration manner of the reference signal composed of the DRS in the frequency domain of 5 MHz may include: for the PSS and SSS components in the DRS, first, the middle 6 resource blocks (RBs) of the 5 MHz frequency domain are configured with a conventional PSS/SSS, A PSS/SSS replica is separately configured based on the RBs on both sides of the middle 6 RBs.
  • the manner in which the RBs on the two sides are respectively configured with one PSS/SSS copy includes: 1.
  • the RBs on the two sides are symmetrically placed on the PSS/SSS replica, that is, the DRS frequency domain pattern is symmetric; 2.
  • the RBs on the two sides are
  • the sequence used for the configured PSS/SSS copy is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copies of the RBs placed on the two sides is the middle 6 RB configurations.
  • Deformation of the sequence used by the PSS/SSS the deformation is not included in the range of the conventional PSS/SSS, to minimize the confusion caused by the UE detecting the conventional PSS/SSS; 3.
  • the RBs on the two sides may select an RB occupying the edge of the 5 MHz bandwidth, and at least one RB is spared between the RBs configured with PSS/SSS in the middle, so as to occupy a bandwidth of 5 MHz as much as possible; or, adjacent to the intermediate configuration
  • the 6 RBs with the regular PSS/SSS start to configure the PSS/SSS replicas, and the other RBs are spared, so that the interference to the adjacent bandwidth can be minimized as much as possible; or the edge vacant part RBs, for example, 1 RB free, Reduce the sideband effect.
  • the configuration of the DRS frequency domain image in the 5 MHz bandwidth may be: for the PSS and SSS components in the DRS, first, the middle 6 RBs in the 5 MHz frequency domain are configured with the conventional PSS/SSS, The RBs on both sides are respectively configured with a PSS/SSS copy.
  • This mode can be specifically referred to the above description, and details are not described herein again.
  • the configuration of the DRS frequency domain image in the 10 MHz bandwidth may be: For the PSS and SSS components in the DRS, first, the middle 6 RBs in the 10 MHz frequency domain are configured with the regular PSS/SSS. The RBs on both sides are respectively configured with at least one copy of the PSS/SSS. among them,
  • the method for configuring one PSS/SSS copy for each RB on both sides includes the following: 1.
  • the RBs on both sides are symmetrically placed on the PSS/SSS copy, that is, the DRS frequency domain pattern is symmetric; 2.
  • the two The sequence of the PSS/SSS copy of the side RB configuration is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copy of the RB placed on both sides is the middle 6
  • Deformation of the sequence used by the PSS/SSS of the RB configuration the deformation is not included in the range of the conventional PSS/SSS, so as to minimize the confusion caused by the UE detecting the conventional PSS/SSS;
  • the PSS/SSS copy of the RB configuration of the side may select an RB occupying the edge of the 10 MHz bandwidth, and at least one RB is spared between the RBs configured with PSS/SSS in the middle, so as to
  • the method for configuring two PSS/SSS copies on both sides includes the following: 1.
  • the RBs on both sides are symmetrically placed with PSS/SSS copies, that is, the DRS frequency domain patterns are symmetric; 2.
  • the two sides are
  • the sequence used for the PSS/SSS copy of the RB configuration is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copies of the RBs placed on the two sides is the middle 6 RBs.
  • the PSS/SSS replica of the RB configuration may select an RB occupying the edge of the 10 MHz bandwidth, and at least one spare space between the RBs configured with PSS/SSS in the middle. RB, so that the 10MHz bandwidth can be occupied as much as possible; or, adjacent to the 6 RBs with the conventional PSS/SSS configured in the middle, the PSS/SSS replicas are configured to be spared, and other RBs are spared, so that the phase can be minimized as much as possible.
  • edge vacant part RB for example, 1 RB free to reduce the sideband effect; 4.
  • the 2 PSS/SSS copies one of which is configured at the edge of the system bandwidth, as One embodiment may spare part of the RB, for example, 1 RB; another PSS/SSS copy is placed in the middle of the center PSS/SSS and the edge PSS/SSS symmetry, which can configure the PSS/SSS copy as uniformly as possible, occupying
  • the signal is more uniform, which is also conducive to uniform measurement and sampling in the frequency domain.
  • the method for configuring three PSS/SSS copies on both sides includes the following: 1.
  • the RBs on both sides are symmetrically placed on the PSS/SSS copy, that is, the DRS frequency domain pattern is symmetric; 2.
  • the two sides are
  • the sequence used for the PSS/SSS copy of the RB configuration is the same as the sequence used by the PSS/SSS of the middle 6 RB configurations to simplify the design; or the sequence used for the PSS/SSS copies of the RBs placed on the two sides is the middle 6 RBs.
  • the PSS/SSS replica of the RB configuration may select an RB occupying the edge of the 10 MHz bandwidth, and at least one RB may be spared between the RBs configured with PSS/SSS in the middle, so as to occupy a bandwidth of 10 MHz as much as possible; or, adjacent to the middle
  • the 6 RBs configured with the normal PSS/SSS start to configure the PSS/SSS replicas, and spare other RBs, so as to minimize interference to adjacent bandwidths; or, the edge vacant part RBs, for example, 1 RB, To reduce the sideband effect; 4, the 3 PSS/SSS copies, one PSS/S outside The SS copy is configured at the edge of the system bandwidth, and some RBs can be spared, for example, 1 RB.
  • PSS/SSS replicas are placed in the middle of the center PSS/SSS and the edge PSS/SSS symmetry.
  • a PSS/SSS copy which occupies a more uniform signal, is also advantageous for uniform measurement and sampling in the frequency domain.
  • the configuration of the DRS frequency domain image in the 15/20 MHz bandwidth can be: for DRS In the PSS and SSS components, first, the middle 6 RBs in the 15/20 MHz frequency domain are configured with conventional PSS/SSS. The RBs on both sides are respectively configured with at least one PSS/SSS copy.
  • the specific implementation manner is the same as the configuration of the DRS frequency domain image of the 10 MHz bandwidth, and details are not described herein again.
  • FIG. 8 is a schematic diagram of a seventh DRS transmission pattern according to Embodiment 1 of the present invention; as shown in FIG. 8, where R represents a CRS.
  • R represents a CRS.
  • the CRS or the CSI-RS may be a CRS/CSI-RS component in the DRS, and its constituent features are consistent with those on other OFDM symbols of the DRS. For example, the number of antenna ports is the same and the sequence used is the same.
  • the configuration unit 21 is configured to send the DRS and the user data at the same time or different times according to the second preset manner, where the DRS and the user are configured according to the second preset manner.
  • the data is sent at the same time or different times, including: when the DRS transmission pattern in the first preset time domain is consistent with the DRS transmission pattern in the second preset time domain, the DRS is configured to be sent simultaneously or not simultaneously with the user data; or When the DRS transmission pattern in the first preset time domain and the DRS transmission pattern in the second preset time domain are inconsistent, the DRS is configured to be sent simultaneously or not simultaneously with the user data.
  • the configuring the DRS and the user data are sent at the same time or different times, including the following scenarios:
  • Scenario 1 The scenario in which the DRS transmission pattern in the first preset time domain is inconsistent with the DRS transmission pattern in the second preset time domain, that is, the time domain in the T1 duration and the time domain in the T2 duration, the DRS is sent.
  • the scenario is inconsistent; this scenario includes the following implementations:
  • Embodiment 1 When the DRS is sent together with the user data, only the RBs of the system bandwidth center can be configured to send the PSS/SSS, and the RBs on the two sides do not send the PSS/SSS copy; wherein the RBs on the two sides can be configured to be configured to send. User data.
  • Embodiment 2 When the DRS is transmitted together with the user data, only the RB of the system bandwidth center may be configured to transmit the PSS/SSS, and the RBs on both sides may not send the PSS/SSS copy; and the CRS/CSI-RS in the DRS component is transmitted. Due to the frequency domain sparse occupancy, the REs occupied by the reference signals on the OFDM symbols punct the data: 1. When the data is rate matched, the RE occupied by the reference signal is considered to be an unavailable RE; 2. When the data is rate matched, it is considered The REs occupied by the reference signals are available REs, but the data corresponding to the REs are not removed when the data is mapped.
  • Embodiment 3 Configure a DRS burst with a short duration. For example, only one basic structure of the DRS is transmitted.
  • the UE In a manner that the DRS transmission pattern in the first preset time domain is inconsistent with the DRS transmission pattern in the second preset time domain, the UE needs to assume two possible DRS structures, which may be based on detection and measurement;
  • the DRS structure currently used by the UE may, for example, notify whether or not data is transmitted at the same time, or only select to notify the change of the DRS structure, and whether data is simultaneously transmitted transparent to the UE.
  • the DRS when the DRS is transmitted together with the user data, the DRS cannot be mapped to the RE where the demodulation reference signal (DMRS) is located; it cannot be mapped to the RE where the physical broadcast channel (PBCH) is transmitted.
  • DMRS demodulation reference signal
  • PBCH physical broadcast channel
  • Scenario 2 The scenario in which the DRS transmission pattern in the first preset time domain is consistent with the DRS transmission pattern in the second preset time domain, that is, in the time domain of the T1 duration and the time domain of the T2 duration, the DRS is transmitted.
  • the DRS is full of the entire system bandwidth of the OFDM symbol in which it is located.
  • the RBs of the system bandwidth center may be configured to transmit PSS/SSS, and the RBs on both sides are not configured to send PSS/SSS replicas, and send CRS and/or CSI-RS in the DRS component. Since the CRS and/or CSI-RS components are sparsely occupied in the frequency domain, these RBs can still be configured to schedule transmission of user data.
  • the RBs on both sides adopt the extension mode of the PSS/SSS copy, that is, the RBs on both sides adopt the preset rule to configure the PSS/SSS copy, then only the spare RB can be used.
  • the RBs are not configured to transmit user data, or the REs occupied by the reference signals on the OFDM symbols punct data: 1.
  • the rate matching is considered to be unavailable RE; 2.
  • the data is rate matched, it is considered The REs occupied by the reference signals are available REs, but the data corresponding to the REs are not removed when the data is mapped.
  • the configuration unit 21 is configured to configure the DRS to be a periodic or aperiodic transmission mode.
  • the configuration, where the DRS is a periodic transmission mode includes: the DRS transmission pattern is static or half. Static configuration; the semi-static configuration indicates that the DRS transmission pattern does not change in a preset period; the configuring the DRS to be an aperiodic transmission manner, including: DRS transmission pattern dynamic configuration, the DRS is triggered based on dynamic signaling .
  • the periodic DRS has at least one feature that the DRS transmission pattern is in a static or semi-static configuration, that is, the DRS transmission pattern does not change within a preset time range.
  • the periodic transmission mode that is, the preset period (that is, the preset time range) allows a certain offset to be performed based on the pre-configuration, and the offset mode is predefined; the UE and other neighboring cell UEs may be notified to perform measurement.
  • the aperiodic DRS has at least one of the following features: DRS transmission pattern dynamic configuration, the DRS transmission pattern dynamic configuration, that is, the DRS transmission pattern changes in real time, or changes within a first preset time range; A preset time range is less than the preset time range, that is, the first preset time range is smaller than the preset period.
  • the aperiodic transmission mode is triggered by the dynamic aperiodic mode, and dynamic signaling is required. In consideration of the interaction delay requirement, it is preferably configured as a UE measurement of the service; therefore, as an implementation manner, only the serving UE is notified. Make measurements.
  • the aperiodic DRS is primarily configured for synchronization, AGC and/or channel state information measurements, and/or channel occupancy of the UEs it serves.
  • the structure of the aperiodic DRS is different from the structure of the periodic DRS.
  • the antenna port configuring the CRS component in the aperiodic DRS is consistent with the CRS conventionally used for channel state information measurement; if based on CSI- RS performs channel state information measurement, then configures The antenna port of the CSI-RS component in the aperiodic DRS is identical to the CSI-RS conventionally used for channel state information measurement.
  • the base station aperiodicly triggers the aperiodic DRS, and the UE may perform channel state information measurement based on CSI-RS and/or CRS components in the aperiodic DRS.
  • the UE needs to be triggered to perform measurement, and the triggering manner may be: (1) explicit mode, which is notified by the physical layer control signaling. Preferably, it is a common control signaling, that is, can be simultaneously received by multiple UEs and simultaneously notify the multiple UEs; (2) implicitly, the aperiodic DRS defaults to the initial subframe of the occupation period, for example, the first or the first In two subframes, the UE performs measurements on the default subframe. Or, by default, k subframes before resource preemption occur, and the UE performs measurement on the k subframes.
  • the aperiodic DRS and the CSI-RS and/or CRS conventionally used for channel state information measurement appear in the same subframe and/or adjacent subframe, it may be processed as follows: (1) Simultaneous transmission, notifying the aperiodic DRS
  • the UE performs channel state information measurement based on the CSI-RS and/or the CRS component in the aperiodic DRS, and the UE can perform not only channel state information measurement but also the aperiodic measurement by using the aperiodic DRS.
  • Other information carried by the DRS; the UE not notifying the aperiodic DRS performs channel state information measurement based on CSI-RS and/or CRS conventionally used for channel information measurement.
  • the UE notifying the aperiodic DRS does not perform channel state information measurement based on the CSI-RS and/or CRS components in the aperiodic DRS, but performs channel based on the regular CSI-RS and/or CRS.
  • State information measurement the UE obtains other information carried by the aperiodic DRS by using the aperiodic DRS; and not notifying the UE of the aperiodic DRS based on CSI-RS and/or CRS conventionally used for channel information measurement Perform channel state information measurement.
  • the aperiodic DRS may adopt a periodic DRS structure, that is, the number of antenna ports of its CSI-RS and/or CRS components is small, and does not need to be consistent with the antenna ports of the conventional CSI-RS and/or CRS. (3) Not transmitting at the same time, only the regular CSI-RS and/or CRS are transmitted. Since the conventional CSI-RS and/or CRS can already satisfy the main channel state measurement and the like, the resource overhead of the aperiodic DRS can be reduced. However, the unique information carried by the non-periodic DRS cannot be transmitted and measured. (4) Not transmitting at the same time, only the aperiodic DRS is transmitted. Can reduce conventional CSI-RS and / or Resource overhead of CRS. However, it is necessary to notify the configuration of the aperiodic DRS to all UEs that need to be measured based on conventional CSI-RS and/or CRS, which will generate a certain signaling overhead.
  • Scenario 1 The aperiodic DRS is transmitted before the initial transmission of data, that is, part or all of the transmission of the DRS structure does not overlap with data transmission.
  • the P1 portion of the DRS can be used for channel occupation.
  • the P1 partial structure of the DRS satisfies the specification requirement of the claimed bandwidth in the time domain continuous and/or frequency domain occupied bandwidth.
  • the aperiodic DRS is sent at the end of the data transmission, that is, part or all of the transmission of the DRS structure does not overlap with the data transmission, and for the P2 part of the DRS that does not overlap, the P2 part structure of the DRS
  • the bandwidth occupied in the time domain continuous and / or frequency domain meets the specification requirements of the claimed bandwidth.
  • Scenario 2 The aperiodic DRS is sent in the middle of the data. This scenario includes the following implementations:
  • Embodiment 1 Part or all of the signal P3 of the aperiodic DRS is transmitted simultaneously with data, and the P3 part of the DRS and the data occupy different resources in the frequency domain.
  • the P3 part of the DRS can occupy frequency domain resources that are not occupied by data, and the manner can also play a channel occupation role.
  • the bandwidth occupied by the data transmission does not meet the requirements of the specification, and the P3 part of the DRS can be used to achieve the occupied bandwidth to meet the specification requirements.
  • Embodiment 2 As shown in FIG. 9, a part of the time slot resource T1 is not transmitted in the middle of the data structure, and is configured to continuously transmit the aperiodic DRS on the resource where the time slot resource T1 is located to reach the channel. For the purpose of occupation, the time slot resource T1 can be prevented from being preempted by other nodes as being idle.
  • the configuration unit 21 is configured to configure SRS to be associated with DRS transmission; the configuration SRS is accompanied by DRS transmission, including: configuring the SRS to be accompanied by DRS accompanying transmission of the serving cell where the UE is located; or configuring the SRS and the UE Aperiodic DRS of the serving cell Accompanying transmission; or, configuring the SRS to be accompanied by the periodic DRS of the serving cell and the neighboring cell where the UE is located; or configuring the SRS along with the DRS transmission based on the signaling indication.
  • CSI of DL and UL may be obtained by using channel reciprocity, which is configured as scheduling of adjacent DL and/or UL.
  • the carrier preemption of the UL is performed by a base station (eNB) to perform an LBT scenario.
  • eNB base station
  • the eNB performs carrier preemption based on the DRS transmission requirement.
  • the UE transmits the SRS to the base station at time T2 after the time T1 immediately after receiving the DRS.
  • the SRS transmission is as early as possible; on the other hand, to improve the accuracy of the measurement, the SRS can repeatedly transmit multiple OFDM symbols.
  • the SRS occupied bandwidth is at least 80% of the nominal system bandwidth.
  • T 0 represents the minimum allowable duration
  • T MAX represents the maximum allowable duration
  • the SRS is sent along with the DRS of the serving cell where the UE is located, instead of the DRS of other neighboring cells;
  • Aperiodic DRS carrier preemption and transmission can be triggered. Preferably, only the UE of the serving cell is notified for the UE in the serving cell, and the UE of other neighboring cells may not be aware of the aperiodic DRS. Triggering aperiodic DRS transmission can be used for at least one of the following purposes: CSI measurement, synchronization measurement requirement, and SRS transmission requirement.
  • Two types of DRS periodic (or quasi-periodic) DRS, aperiodic DRS.
  • the periodic (or quasi-periodic) DRS is used for both the UE in the serving cell and the neighboring cell UE; the aperiodic DRS can be used only for the UE in the local cell.
  • the periodic (or quasi-periodic) DRS needs to inform the UE of the neighboring cell instead of The periodic DRS only needs to inform the UE of the own cell.
  • the quasi-period DRS refers to a periodic manner, but each periodic point is a time window, and the DRS may have a certain offset around the time window, and/or some of the periods may not be transmitted.
  • the specific indication manner may be: each time the control information indicates whether to send; or, the semi-static configuration changes the transmission mode: a mode in which the SRS is transmitted or a mode in which the SRS is not transmitted.
  • the trigger transmission time is preferably an aperiodic SRS.
  • the occupied time domain resource is transmitted in the last OFDM symbol of one subframe.
  • the processing manner may be:
  • the eNB indicates not to send the DRS and/or SRS to avoid conflict with user data; or the eNB indicates that user data is not sent, and the user data is prevented from colliding with the DRS and/or the SRS;
  • the DRS and/or SRS are allowed to be transmitted.
  • the DRS and/or the SRS may be configured to be transmitted in the last OFDM symbol, and only the last OFDM symbol is not configured to transmit the user data, thereby avoiding the user data and the DRS. And / or SRS conflicts.
  • DRS and/or SRS may be transmitted in multiple OFDM symbols after the previous subframe of one UL subframe, or in the next one of the UL subframes
  • the plurality of OFDM symbols following the subframe transmit DRS and/or SRS; of course, the last OFDM symbol of the UL subframe may also be included; preferably, the DRS and/or SRS are configured in the last one of the subframes
  • the OFDM symbol transmits an SRS.
  • the relationship between the DRS and/or the SRS for the DL and the user data may be transmitted in the UpPTS or in the first N1 OFDM symbols occupying one subframe, and N1 is a positive integer.
  • N2 OFDM symbols are transmitted in the control domain of one subframe, N2 is a positive integer, and N2 is less than or equal to N1, and the number of OFDM symbols is not more than 3.
  • the first N3 OFDM symbols of one DL subframe are generally a control domain, N3 is a positive integer, and N3 is greater than N2, and user data is not mapped.
  • the UE performs a scenario in which the LBT preempts the UL carrier resource.
  • the UE performs the LBT at the time when the DRS may occur. Since the base station of the LAA has occupied and transmitted the DRS, the probability that the UE immediately succeeds in preempting the DRS transmission time is high.
  • the eNB triggers/configures non-periodic DRS measurements, and the UE performs LBT at the configured aperiodic DRS end position to preempt and transmit the SRS.
  • the beneficial effect of this embodiment is that the random occupation of the carriers makes the CSI-RS transmission also random. This makes the measurement feedback of CSI unable to meet the timeliness of scheduling requirements in time.
  • the uplink and downlink CSI can be obtained in a timely manner based on SRS.
  • This method is also beneficial to solve the problem that the DRS occupation time may be less than 1 ms; the CSI can be obtained in time.
  • the configuration unit 21 is configured to configure a broadcast channel with DRS transmission, where the configuration broadcast channel is accompanied by DRS transmission, including: configuring a broadcast channel with periodic DRS transmission, and aperiodic DRS not with a broadcast channel.
  • the broadcast channel start OFDM symbol to be the same as the first group of PSS/SSS start OFDM symbols of the DRS component; or configuring the number of antenna ports corresponding to the broadcast channel to correspond to the CRS component in the DRS
  • the number of antenna ports is consistent; or the configuration broadcast channel is transmitted on the OFDM symbol in which the CRS component in the DRS is located, and/or on the OFDM symbol adjacent to the CRS; or, the configuration broadcast channel is in a predefined carrier group
  • the at least one carrier is sent, and the other carriers in the carrier are not configured to send the broadcast channel.
  • the configuring, by the third preset manner, the broadcast channel is accompanied by DRS transmission, including at least one of the following manners:
  • the other frequency resources of the system bandwidth preferably map at least one RS component of the DRS;
  • the broadcast channel is configured on a preset number of RBs in a carrier center. For example, it is configured to be sent on six RBs in the middle of the carrier;
  • the other frequency resources of the system bandwidth preferably map at least one RS component of the DRS, the RS component comprising a CSI-RS and/or a CRS.
  • the starting OFDM symbol of the broadcast channel is the same as the first group of PSS/SSS starting OFDM symbols of the DRS component; or the starting OFDM symbol of the broadcast channel is on the OFDM symbol after the first group of PSS/SSS . It is convenient for the UE to select the DRS-based PSS/SSS component to obtain synchronization and ID information to facilitate identification and demodulation of the broadcast channel.
  • the number of antenna ports corresponding to the broadcast channel is the same as the number of antenna ports corresponding to the CRS component in the DRS; preferably, the number of the ports is 1.
  • the number of antenna ports corresponding to the broadcast channel is the same as the number of antenna ports corresponding to the CRS component of the DRS, which facilitates demodulation based on the CRS component.
  • the broadcast channel configuration is transmitted on the OFDM symbol in which the CRS component in the DRS is located, and/or on the OFDM symbol adjacent to the CRS, to facilitate the UE to demodulate the broadcast channel based on the CRS.
  • the configuration broadcast channel is transmitted on at least one of the predefined carrier groups, and the other carriers other than the at least one carrier are not configured to transmit the broadcast channel.
  • the predefined carrier group CG consists of N carriers.
  • the carrier C1 is configured to transmit the broadcast channel, and the other N-1 carriers in the carrier group CG do not transmit the broadcast channel.
  • the sending unit 22 is configured to control the periodic DRS and/or the aperiodic DRS according to the third preset manner according to the configured DRS transmission pattern, and then perform the LBT transmission based on the first listening; or, according to the fourth preset manner, Periodic DRS and/or aperiodic DRS are not transmitted based on LBT.
  • Embodiment 1 Periodic DRS is transmitted based on LBT, and aperiodic DRS is not transmitted based on LBT.
  • the aperiodic DRS may be sent according to a short control information (SCS) manner; and/or the aperiodic DRS is accompanied by user data transmission, and there is no need to specifically carry out a unique LBT for the aperiodic DRS transmission.
  • SCS short control information
  • This method is beneficial to timely triggering transmission of aperiodic DRS, thereby facilitating the base Timely measurement requirements for non-periodic DRS.
  • Embodiment 2 Both periodic DRS and aperiodic DRS are transmitted based on LBT. This mode mainly considers scenarios where the SCS mechanism is not supported.
  • Embodiment 3 Aperiodic DRS is transmitted based on LBT, and periodic DRS is not transmitted based on LBT.
  • the periodic DRS may be sent according to a short control information (SCS) manner; and/or the periodic DRS is accompanied by user data transmission, and there is no need to specifically carry out a unique LBT for the periodic DRS transmission.
  • SCS short control information
  • the method mainly utilizes the feature that the period of the periodic DRS transmission is long and the duration of each burst is also short, and the duration of the transmission occupation can be controlled within the delay requirement range of the SCS.
  • Embodiment 4 The foregoing Embodiments 1 to 3 are mixed and transmitted in different manners to provide more flexibility and obtain more transmission opportunities.
  • Embodiment 5 The LBT implementation method of the DRS includes: (1) a contention window end position is set at a time point of pre-configured DRS transmission; or (2) a random backoff value ends in a nearby pre-configured DRS candidate transmission. Time point. This method can improve the priority of DRS preemption and improve the transmission opportunity.
  • the configuration unit 21 in the base station may be implemented by a central processing unit (CPU), a digital signal processor (DSP), or a programmable signal processor (DSP) in the actual application.
  • CPU central processing unit
  • DSP digital signal processor
  • DSP programmable signal processor
  • a Field-Programmable Gate Array (FPGA) is implemented; the transmitting unit 22 in the base station can be implemented by a transmitter or a transmitting antenna in the base station in practical applications.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the various components shown or discussed may be through some interface, device or unit.
  • the indirect coupling or communication connection can be electrical, mechanical or other form.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk.
  • optical disk A medium that can store program code.
  • the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disk, or an optical disk.
  • the synchronization signal of the unlicensed carrier is transmitted by configuring the at least one of the time parameter, the frequency domain location, and the component parameter in the DRS transmission pattern, and the opportunity occupancy of the unlicensed carrier can be satisfied. Continuously occupied demand.

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

Abstract

La présente invention concerne, dans certains modes de réalisation, un procédé d'émission d'un signal de synchronisation de porteuse sans licence, une station de base et un support de stockage. Le procédé comporte les étapes suivantes: une station de base configure un diagramme d'émission pour le signal de référence de découverte (DRS), le diagramme d'émission du DRS comprenant au moins un des paramètres suivants: paramètre de temps, emplacement dans le domaine fréquentiel et paramètre de composition; et le DRS est émis sur la base du diagramme d'émission de DRS configuré pour permettre au DRS de présenter une périodicité et/ou une persistance, ou une apériodicité et/ou une persistance.
PCT/CN2016/074100 2015-07-28 2016-02-19 Procédé d'émission d'un signal de synchronisation de porteuse sans licence, station de base et support de stockage Ceased WO2017016216A1 (fr)

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CN201510449433.X 2015-07-28

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