CN106936558B

CN106936558B - Enhanced sounding reference signal mapping method and device

Info

Publication number: CN106936558B
Application number: CN201710258890.XA
Authority: CN
Inventors: 周明宇; 云翔
Original assignee: Beijing Bai Caibang Technology Co ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2021-03-30
Anticipated expiration: 2037-04-19
Also published as: WO2018192409A1; CN106936558A

Abstract

The embodiment of the invention provides a method and a device for enhanced sounding reference signal mapping, relates to the technical field of communication, and can perform coverage enhancement on sounding reference signals. The method comprises the steps that a base station determines information of time-frequency resources used for bearing eDRS according to cell coverage enhancement capability, wherein the eDRS comprises one or more of enhanced synchronization signals, enhanced reference signals, enhanced physical broadcast channels and enhanced data channels, and the information of the time-frequency resources comprises one or more of the size of occupied resources, the position of a frequency domain and the position of a time domain of the eDRS; the base station maps the eDRS according to the information of the time-frequency resource; the base station sends the time-frequency resource mapped with the eDRS to a terminal; and the terminal receives eDRS sent by the base station according to the information of the time-frequency resource. The technical scheme provided by the embodiment of the invention is suitable for the eDRS transmission process.

Description

Enhanced sounding reference signal mapping method and device

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

The communication system provides communication services for user terminals (e.g., mobile phones) through radio access network equipment (e.g., base stations) and core network equipment (e.g., home location registers), etc. At present, because the geographical location of some user terminals is special (such as water meter/electricity meter of basement), when the user terminal at the geographical location communicates with the base station, the signal penetration loss is large, the channel fading is large, and finally the communication quality of the user terminal is reduced. Therefore, it is necessary to expand the Signal energy or quality between the ue and the base station and perform coverage enhancement on each physical channel or Signal between the ue and the base station, including the Detection Reference Signal (DRS).

In the prior art, for a communication system operating in an authorized frequency band, probe signals are transmitted based on a narrow band. In a licensed band communication system, the channel is always available and the sounding signal achieves coverage enhancement through repeated transmission over time and frequency.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:

for a communication system working in an unlicensed frequency band, DRS is transmitted over a relatively large bandwidth, and there is a limitation of a Listen Before Talk mechanism (LBT, Listen Before Talk), and there is no feasible DRS coverage enhancement method at present.

[ summary of the invention ]

In view of this, embodiments of the present invention provide a method and an apparatus for enhanced sounding reference signal mapping, which, for a communication system operating in an unlicensed frequency band, transmit enhanced sounding reference signals (edrss) by introducing more time-frequency resources, so as to implement coverage enhancement of DRSs.

In a first aspect, an embodiment of the present invention provides an enhanced sounding reference signal mapping method, which is applicable to a base station operating in an unlicensed frequency band, where the method includes:

determining information of a time-frequency resource used for carrying enhanced sounding Reference signals (eDRSs) according to cell coverage enhancement capability, wherein the eDRSs comprise one or more of enhanced synchronization signals, enhanced Reference signals, enhanced physical broadcast channels and enhanced data channels, and the information of the time-frequency resource comprises one or more of occupied resource size, frequency domain position and time domain position of the eDRSs;

mapping the eDRS according to the information of the time-frequency resource;

and sending the time-frequency resource mapped with the eDRS to a terminal.

The above-described aspect and any possible implementation manner further provide an implementation manner, where the information about the time-frequency resources includes a size of occupied resources of the eDRS, and the size of the occupied resources depends on a level of cell coverage enhancement capability.

In the aspect and any possible implementation manner described above, an implementation manner is further provided, where when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a size of an occupied resource of the eDRS, the size of the occupied resource is used to indicate that the time-frequency resource occupied by the enhanced synchronization signal is m times of a time-frequency resource occupied by an existing synchronization signal, and a value of m is a first specified value.

The aspect and any possible implementation manner described above further provide an implementation manner, when the eDRS includes enhanced synchronization signals, and the information of the time-frequency resources includes frequency domain locations of the eDRS, where the frequency domain locations are used to indicate that the enhanced synchronization signals are located on the central 6 physical resource block pairs of the system bandwidth.

The aspect and any possible implementation manner described above further provide an implementation manner, when the eDRS includes enhanced synchronization signals, and the information of the time-frequency resources includes frequency domain locations of the eDRS, where the frequency domain locations are used to indicate that the enhanced synchronization signals are located on non-central 6 physical resource block pairs of a system bandwidth.

The aspect and any possible implementation manner described above further provide an implementation manner, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a time domain location of the eDRS, where the time domain location is used to indicate that the enhanced synchronization signal occupies any one orthogonal frequency division multiplexing symbol.

The foregoing aspect and any possible implementation manner further provide an implementation manner, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a time domain location of the eDRS, where the time domain location is used to indicate that the enhanced synchronization signal occupies a first designated orthogonal frequency division multiplexing symbol.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the first designated orthogonal frequency division multiplexing symbol represents a symbol without a cell reference signal or a symbol without a physical downlink control channel or a symbol without a cell reference signal and a physical downlink control channel;

the cell reference signal comprises at least an existing cell reference signal;

the physical downlink control channel at least comprises the existing physical downlink control channel.

As for the above-mentioned aspect and any possible implementation manner, an implementation manner is further provided, where the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes an occupied resource size of the eDRS, where the occupied resource size is used to indicate that the time-frequency resource occupied by the enhanced physical broadcast channel is n times of the occupied time-frequency resource of an existing physical broadcast channel, and a value of n is a second specified value.

The aspect and any possible implementation manner described above further provide an implementation manner, when the eDRS includes an enhanced physical broadcast channel and the information of the time-frequency resource includes a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced physical broadcast channel is located on the center 6 physical resource block pairs of the system bandwidth.

The aspect and any possible implementation manner described above further provide an implementation manner, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced physical broadcast channel is located on a non-central 6 physical resource block pairs of a system bandwidth.

The aspect and any possible implementation manner described above further provide an implementation manner, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a time domain location of the eDRS, where the time domain location is used to indicate that the enhanced physical broadcast channel occupies any one orthogonal frequency division multiplexing symbol.

The foregoing aspect and any possible implementation manner further provide an implementation manner, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a time domain location of the eDRS, where the time domain location is used for the enhanced physical broadcast channel to occupy a second designated orthogonal frequency division multiplexing symbol.

The above-described aspect and any possible implementation further provide an implementation in which the second designated orthogonal frequency division multiplexing symbol represents a symbol that does not contain a cell reference signal;

the cell reference signal includes at least an existing cell reference signal.

As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, when the eDRS includes an enhanced synchronization signal and an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain location of the eDRS, if both the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on a central 6 physical resource block pairs of a system bandwidth, a transmission priority of the enhanced synchronization signal is higher than a transmission priority of the enhanced physical broadcast channel.

As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, when the eDRS includes an enhanced synchronization signal and an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain location of the time-frequency resource, if the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on a central 6 physical resource block pairs or a non-central 6 physical resource block pairs of a system bandwidth, a transmission priority of the enhanced synchronization signal is the same as a transmission priority of the enhanced physical broadcast channel.

The above-described aspect and any possible implementation manner further provide an implementation manner, where when the information of the time-frequency resource includes a time-domain location of the time-frequency resource, a relative time relationship between the eDRS and an existing sounding reference signal (DRS) is fixed.

The above-described aspect and any possible implementation manner further provide an implementation manner, where when the information of the time-frequency resource includes a time domain location of the time-frequency resource, a relative time relationship between the eDRS and the DRS flexibly changes according to a time criterion.

The above-described aspects and any possible implementations further provide an implementation in which the temporal criteria includes a point in time at which a listen-before-talk mechanism succeeds and the eDRS available time period.

In a second aspect, an embodiment of the present invention provides an enhanced sounding reference signal mapping method, which is applicable to a terminal operating in an unlicensed frequency band, and the method includes:

and receiving eDRS sent by the base station according to the information of the time-frequency resource.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, where after the receiving the eDRS sent by the base station, the method further includes:

and performing blind detection on the received eDRS to decode the eDRS.

In a third aspect, an embodiment of the present invention provides an enhanced sounding reference signal mapping apparatus, which is suitable for a base station operating in an unlicensed frequency band, and the apparatus includes:

a determining unit, configured to determine, according to a cell coverage enhancement capability, information of a time-frequency resource used for carrying an enhanced sounding Reference Signal (eDRS), where the eDRS includes one or more of an enhanced synchronization Signal, an enhanced Reference Signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS;

a mapping unit, configured to map the eDRS according to the information of the time-frequency resource;

and the sending unit is used for sending the time-frequency resource mapped with the eDRS to a terminal.

the cell reference signal comprises at least an existing cell reference signal;

the cell reference signal includes at least an existing cell reference signal.

In a fourth aspect, an embodiment of the present invention provides an enhanced apparatus for sounding reference signal mapping, which is suitable for a terminal operating in an unlicensed frequency band, and the apparatus includes:

and the receiving unit is used for receiving the eDRS sent by the base station according to the information of the time-frequency resource.

In the aspect and any possible implementation manner described above, there is further provided an implementation manner, where after the receiving the eDRS sent by the base station, the apparatus further includes:

and a blind detection unit, configured to perform blind detection on the received eDRS to decode the eDRS.

In a fifth aspect, an embodiment of the present invention provides an apparatus for enhanced sounding reference signal mapping, which is suitable for a base station operating in an unlicensed frequency band, where the apparatus includes a processor, a memory, and a transceiver; the processor, the memory and the transceiver communicate through a bus; the memory has computer code configured therein that the processor can invoke to control the transceiver;

the processor is configured to determine, by the transceiver, information of a time-frequency resource used for carrying an enhanced sounding Reference Signal (eDRS) according to a cell coverage enhancement capability, where the eDRS includes one or more of an enhanced synchronization Signal, an enhanced Reference Signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS;

the processor is configured to map the eDRS through the transceiver according to the information of the time-frequency resource;

and the processor is configured to send the time-frequency resource mapped with the eDRS to a terminal through the transceiver.

In a sixth aspect, an embodiment of the present invention provides an apparatus for enhanced sounding reference signal mapping, which is suitable for a terminal operating in an unlicensed frequency band, where the apparatus includes a processor, a memory, and a transceiver; the processor, the memory and the transceiver communicate through a bus; the memory has computer code configured therein that the processor can invoke to control the transceiver;

and the processor is used for receiving the eDRS sent by the base station through the transceiver according to the information of the time-frequency resource. The embodiment of the invention provides a method and a device for mapping enhanced sounding reference signals, aiming at a communication system working in an unauthorized frequency band, according to information of time-frequency resources for bearing the enhanced sounding reference signals, more time-frequency resources are introduced to bear the enhanced sounding reference signals, and eDRS transmission is completed through interaction of a base station and a terminal, so that repeated transmission of the sounding reference signals on time frequency is realized, the energy of the sounding reference signals is improved, and the coverage enhancement of the sounding reference signals is realized.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a flowchart of a method for enhanced sounding reference signal mapping according to an embodiment of the present invention;

fig. 2 is a mapping diagram of an enhanced sounding reference signal according to an embodiment of the present invention;

fig. 3(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 3(b) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 3(c) is a schematic diagram of another enhanced sounding reference signal mapping provided by an embodiment of the present invention;

FIG. 3(d) is a mapping diagram of another enhanced SRS provided by the embodiment of the invention;

fig. 4(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 4(b) is a mapping diagram of another enhanced sounding reference signal provided by the embodiment of the present invention;

fig. 4(c) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 4(d) is a mapping diagram of another enhanced SRS provided by the embodiment of the invention;

fig. 4(e) is a mapping diagram of another enhanced sounding reference signal provided by the embodiment of the present invention;

FIG. 4(f) is an illustration of a mapping scheme of another enhanced SRS provided by an embodiment of the present invention;

fig. 5(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 5(b) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 5(c) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 5(d) is an illustration of a mapping scheme of another enhanced SRS provided by an embodiment of the present invention;

fig. 6(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 6(b) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 6(c) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 6(d) is an illustration of a mapping scheme of another enhanced SRS provided by an embodiment of the present invention;

fig. 7(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 7(b) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 7(c) is an illustration of a mapping scheme of another enhanced SRS provided by an embodiment of the present invention;

fig. 8(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 8(b) is a mapping diagram of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 8(c) is an illustration of a mapping scheme of another enhanced SRS provided by an embodiment of the present invention;

fig. 9(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 9(b) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 9(c) is an illustration of a mapping scheme of another enhanced SRS provided by an embodiment of the present invention;

fig. 10 is a diagram illustrating a mapping of another enhanced sounding reference signal according to an embodiment of the present invention;

fig. 11(a) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 11(b) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

fig. 11(c) is a schematic diagram of a mapping of another enhanced sounding reference signal provided by an embodiment of the present invention;

FIG. 11(d) is a mapping diagram of another enhanced SRS provided by the embodiment of the invention;

fig. 12 is a flowchart of another method for enhanced sounding reference signal mapping according to an embodiment of the present invention;

fig. 13 is a block diagram illustrating an enhanced apparatus for mapping sounding reference signals according to an embodiment of the present invention;

fig. 14 is a block diagram illustrating an enhanced apparatus for mapping sounding reference signals according to an embodiment of the present invention;

fig. 15 is a block diagram illustrating another enhanced srs mapping apparatus according to an embodiment of the present invention;

fig. 16 is a physical structure diagram of an enhanced sounding reference signal mapping apparatus according to an embodiment of the present invention;

fig. 17 is a physical structure diagram of an enhanced sounding reference signal mapping apparatus according to an embodiment of the present invention.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that although the terms first and second may be used to describe XXX in embodiments of the present invention, these documents should not be limited to these terms. These terms are only used to distinguish documents from each other. For example, a first file may also be referred to as a second file, and similarly, a second file may also be referred to as a first file, without departing from the scope of embodiments of the present invention.

The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The embodiment of the invention provides an enhanced sounding reference signal mapping method, which is applied to a mobile communication system in an unlicensed frequency band (especially for a cellular communication system independently working in the unlicensed frequency band, such as MulteFire (MF)), and in the transmission process of an enhanced sounding reference signal between a coverage enhanced terminal and a base station in the unlicensed frequency band.

The mobile communication technology of the present invention may be WCDMA (Wideband Code Division Multiple Access), CDMA2000(Code Division Multiple Access 2000), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access), WiMAX (world Interoperability for Microwave Access), LTE/LTE-a (Long Term Evolution/Long Term Evolution-Advanced, Long Term Evolution/enhanced, Long Term Access, radio Access based on authorized frequency band), multimedia, and fifth, sixth, and nth generation mobile communication technologies that may appear subsequently.

For convenience of description, the following embodiments are illustrated with an MF system in an unlicensed frequency band. MulteFire is a radio access technology that extends LTE to unlicensed bands, in which unlicensed band carriers can independently provide services without the help of licensed band carriers. This technology also becomes stand-alone LTE-U (stand-alone LTE-U). In order to fairly occupy the unlicensed band channel and avoid mutual interference between unlicensed band devices and other devices in the unlicensed band (e.g., WiFi devices), the MF physical layer introduces a Listen-Before-Talk (LBT) mechanism similar to the WiFi carrier sensing technique. When the base station or the terminal monitors that the unlicensed frequency band channel is occupied, namely LBT fails, the signal is stopped being sent, and when the channel is monitored to be idle, namely LBT succeeds, the signal is sent.

The base station refers to a form of radio station, and refers to a radio access network device that transmits various channels or signals to a terminal through a mobile switching center in a certain radio coverage area.

The terminal refers to a terminal side product capable of supporting a communication protocol of a land mobile communication system, and a special communication Modem module (Wireless Modem) can be integrated by various terminal forms such as a mobile phone, a tablet computer, a data card and the like to complete a communication function.

In the embodiment of the invention, the base station and the terminal both work in an unauthorized frequency band, and are referred to as the base station and the terminal for convenience of description.

As shown in fig. 1, the method includes:

101. the base station determines information of time-frequency resources for carrying enhanced sounding Reference signals (eDRS) according to the cell coverage enhancement capability.

Wherein the eDRS comprises one or more of an enhanced synchronization signal, an enhanced reference signal, an enhanced physical broadcast channel, and an enhanced data channel.

Wherein the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain position, and a time domain position of the eDRS. The information of the time-frequency resource is used for indicating the mapping and transmission of the eDRS.

It should be noted that, for the users performing coverage enhancement in the MF system, the present invention introduces additional time-frequency resources to transmit DRSs, so that the coverage enhancement users can synchronize to obtain system information. In order to be distinguished from the original DRS, the DRS loaded on the additionally introduced time-frequency resource is named as eDRS, and the original DRS is named as the existing DRS. The existing DRS includes an existing synchronization signal (legacy Sync), an existing reference signal, an existing physical broadcast channel, and an existing data channel, the eDRS includes an enhanced synchronization signal (enhanced Sync, e-Sync), an enhanced reference signal, an enhanced physical broadcast channel (enhanced MF-PBCH, eMF-PBCH), an enhanced data channel, and the like, and information carried by each channel in the existing DRS and the eDRS is the same. And, the coverage enhancement users need to decode the eDRS and the existing DRS, and the non-coverage enhancement users only decode the existing DRS.

The Synchronization Signal refers to a Primary Synchronization Signal/Secondary Synchronization Signal (PSS/SSS), MF Primary Synchronization Signal/MF Secondary Synchronization Signal (MF-PSS/MF-SSS, Multefire Primary Synchronization Signal/Multefire Secondary Synchronization Signal).

The Reference signals refer to Cell Reference Signals (CRS) and configured Channel State Information Reference signals (CSI-RS).

The Physical Broadcast Channel refers to an MF Physical Broadcast Channel (MF-PBCH). Here, the MF-PBCH carries an MF main system Information Block (MIB-MF).

The data Channel includes a broadcast Physical Downlink Shared Channel (PDSCH) and a corresponding Physical Downlink Control Channel (PDCCH). Here, the broadcasted PDSCH-carried Information includes an MF System Information Block 1(SIB-MF1, System Information Block Multefire 1).

102. And the base station maps the eDRS according to the information of the time-frequency resource.

And the base station maps the eDRS to the corresponding time-frequency resource according to the specific information of the video resource, such as the size of the resource occupied by the eDRS, the position of the frequency domain, the position of the time domain and the like.

103. And the base station sends the time-frequency resource mapped with the eDRS to a terminal.

The terminal in step 103 is a terminal for performing coverage enhancement, and for convenience of description, the terminal is hereinafter referred to as a terminal for short.

104. And the terminal receives eDRS sent by the base station according to the information of the time-frequency resource.

And the terminal receives the eDRS according to the information of the specific time-frequency resource.

The embodiment of the invention provides a method for mapping enhanced sounding reference signals, which aims at a communication system working in an unauthorized frequency band, introduces more time-frequency resources to bear the enhanced sounding reference signals according to information of the time-frequency resources for bearing the enhanced sounding reference signals, completes transmission of eDRS through interaction of a base station and a terminal, realizes repeated transmission of the sounding reference signals on time frequency, improves the energy of the sounding reference signals, and realizes coverage enhancement of the sounding reference signals.

Further, with reference to the foregoing method flow, when the information of the time-frequency resource includes the size of the occupied resource of the eDRS, the size of the occupied resource depends on the level of the cell coverage enhancement capability.

The maximum coverage enhancement capability of the system may be divided into a plurality of levels, and each cell may determine a set of time-frequency resources of a corresponding size for transmitting eDRS according to different maximum coverage enhancement capabilities (for example, the maximum coverage enhancement capability of the system has three levels of {8dB, 4dB, 0dB }. when the maximum coverage enhancement capability of the system is 0dB, the cell does not perform coverage enhancement). I.e. the size of the time-frequency resources used to carry eDRS depends on the cell coverage enhancement capability. Here, the maximum coverage enhancement capability is taken to be the channel with the worst coverage, and the coverage enhancement of other channels is based on the coverage difference with the channel before the worst channel, so as to compensate different coverage enhancements correspondingly. Therefore, the coverage enhancement of different channels is different, and correspondingly, time-frequency resources with different sizes and different positions are needed.

The embodiment of the invention introduces the information of the enhanced sounding reference signal respectively based on the enhanced synchronization signal (used for synchronization of the coverage enhancement user) and the enhanced physical broadcast channel (used for the coverage enhancement user to obtain the system information MIB-MF).

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a size of an occupied resource of the eDRS, the size of the occupied resource is used to indicate that the time-frequency resource occupied by the enhanced synchronization signal is m times of the time-frequency resource occupied by an existing synchronization signal, and a value of m is a first specified value.

When the time frequency resource occupied by the enhanced synchronization signal is m times of the time frequency resource occupied by the existing synchronization signal, the existing synchronization signal is repeatedly transmitted for m +1 times, namely the existing synchronization signal is enhanced for m +1 times.

Wherein the first specified value may be any non-negative number.

In order to enhance the coverage of the synchronization signal of the coverage enhancement user, the repeated transmission of a certain multiple of the existing synchronization signal is realized by transmitting the enhanced synchronization signal. The size of the resource occupied by the enhanced synchronization signal depends on the cell coverage capability, that is, the number of times of the repeated transmission of the existing synchronization signal depends on the coverage enhancement capability of one cell.

For a clearer explanation, the magnitude relationship between the enhanced synchronization signal and the existing synchronization signal is described as follows. Based on the cell coverage enhancement capability of 0, 4, 8dB, the coverage enhancement of the existing synchronization signal is 0, 2.5, 6.5 dB. Correspondingly, in example 1, the maximum number of repeated transmissions of the existing synchronization signal may be {1, 2, 5}, so as to achieve different coverage enhancement capabilities of the cells. That is, the size of the time-frequency resource occupied by the introduced enhanced synchronization signal is {0, 1, 4} times of the time-frequency resource occupied by the existing synchronization signal, that is, m is {0, 1, 4 }. Example 2, the maximum retransmission number of the existing synchronization signal may be {1, 2, 4.5 }. That is, the size of the time-frequency resource occupied by the introduced enhanced synchronization signal is {0, 1, 3.5} times of the time-frequency resource occupied by the existing synchronization signal, i.e., m is {0, 1, 3.5 }. In example 3, the maximum number of repeated transmissions of the conventional synchronization signal is {1, 2, 4 }. That is, the size of the time-frequency resource occupied by the introduced enhanced synchronization signal is {0, 1, 3} times that occupied by the existing synchronization signal, i.e., m is {0, 1, 3 }. Example 4, the maximum retransmission times of the existing synchronization signal may be {1, 1.5, 4.5 }. That is, the size of the time-frequency resource occupied by the introduced enhanced synchronization signal is {0, 0.5, 3.5} times of the time-frequency resource occupied by the existing synchronization signal, that is, m is {0, 0.5, 3.5 }. Correspondingly, according to the above example, when it is assumed that the coverage enhancement is based on the existing PSS/SSS and MF-PSS/SSS (that is, the existing synchronization signal occupies 4 OFDM (Orthogonal Frequency Division Multiplexing) symbols in total), and the number of OFDM symbols occupied by the enhanced synchronization signal is denoted as N, N is 4 m, that is, the value of N in example 1 is {0, 4, 16}, the value of N in example 2 is {0, 4, 14}, the value of N in example 3 is {0, 4, 12}, and the value of N in example 4 is {0, 2, 14 }. When it is assumed that the coverage enhancement is based on the existing MF-PSS/SSS or PSS/SSS (i.e. the existing synchronization signals occupy 2 OFDM symbols in total), in examples 1, 2, 3, and 4, the values of N are {0, 2, 8}, {0, 2, 7}, {0, 2, 6}, and {0, 1, 7}, respectively.

As shown in fig. 2, coverage enhancement of an existing synchronization signal (legacy Sync) based on 4-OFDM symbols (in the figure, OFDM symbols are identified by symbol) is given. That is, an N-symbol enhanced synchronization signal (e-Sync) is obtained through the existing PSS/SSS and MF-PSS/MF-SSS. For convenience of illustration, assuming that the transmission bandwidth of the enhanced synchronization signal is 6 PRB (Physical Resource Block) pairs, fig. 2 shows a schematic diagram of one PRB pair (the same as the other 5 PRB pairs). In the figure, each small lattice refers to a Resource Element (RE).

It should be noted that, in the embodiment of the present invention, subsequent e-Sync maps are all described based on a legacy Sync with 4-OFDM symbols (that is, the legacy Sync includes PSS/SSS and MF-PSS/MF-SSS), and details are not repeated in the following.

Further, with reference to the foregoing method procedure, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a frequency domain location of the eDRS, the frequency domain location is used to indicate the frequency domain location of the enhanced synchronization signal in a system bandwidth, and the enhanced synchronization signal may be located on the central 6 PRB pairs of the system bandwidth or may be located on the non-central 6 PRB pairs of the system bandwidth.

Based on that the existing synchronization signal (legacy Sync) occupies 4 OFDM symbols, the enhanced synchronization signal (e-Sync) occupies N OFDM symbols, and based on fig. 3(a) -3 (d), the frequency domain position relationship between the enhanced synchronization signal and the existing synchronization signal is further explained. As shown in fig. 3(a) and 3(b), the enhanced synchronization signal is located in the center 6 PRB pairs in the system bandwidth, fig. 3(a) the enhanced synchronization signal of the N-symbol is in a Transmission Time Interval (TTI) different from the conventional synchronization signal, and fig. 3(b) a part of the enhanced synchronization signal is in the same TTI as the conventional synchronization signal. As shown in fig. 3(c), fig. 3(d), the enhanced synchronization signal may also be located in the non-central 6 PRB pairs of the system bandwidth. Fig. 3(c) the enhanced synchronization signal of N-symbol is located in multiple non-central 6 PRB pairs in the TTI of the existing synchronization signal, and fig. 3(d) the enhanced synchronization signal of N-symbol is located in multiple non-central 6 PRB pairs and central 6 PRB pairs in multiple different TTIs. In fig. 3(a) -3 (d), when the enhanced synchronization signal is divided into a plurality of parts, Part1, 2, and 3 … are illustrated. It should be noted that the relationship between the enhanced synchronization signal and the existing synchronization signal is not limited to the examples of fig. 3(a) -3 (d), and there may be more ways.

It should be noted that, for other signals or channels in the eDRS, such as the enhanced physical broadcast channel, the location relationship with the existing broadcast channel may also be mapped according to the location relationships in the examples of fig. 3(a) -3 (d), and is not illustrated here.

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a time-domain location of the eDRS, the time-domain location is used to indicate the time-domain location of the enhanced synchronization signal, and the enhanced synchronization signal may occupy any one OFDM symbol or may occupy a first specified OFDM symbol.

Wherein the first designated orthogonal frequency division multiplexing symbol indicates a symbol without a Cell Reference Signal (CRS), a symbol without a Physical Downlink Control Channel (PDCCH), or a symbol without a cell reference signal and a physical downlink control channel.

The enhanced synchronization signal is transmitted in any one OFDM symbol, which means that the RE of the enhanced synchronization signal can be any one of signals in the legacy system. The enhanced synchronization signal is transmitted on an OFDM symbol without CRS, which means that the RE of the enhanced synchronization signal may be a downlink signal. The enhanced synchronization signal is transmitted on OFDM symbols that do not contain a PDCCH, i.e. the enhanced synchronization signal may be a downlink control channel (PDCCH) signal. The enhanced synchronization signal is transmitted on OFDM symbols that do not contain CRS and PDCCH, i.e. the enhanced synchronization signal may be transmitted in a downlink shared channel (PDCCH) and CRS.

Wherein the Cell Reference Signals (CRS) comprise at least existing cell reference signals. Or, the cell reference signal includes an existing cell reference signal and an enhanced cell reference signal.

Wherein the Physical Downlink Control Channel (PDCCH) comprises at least an existing PDCCH. Or, the physical downlink control channel includes an existing physical downlink control channel and an enhanced physical downlink control channel.

To further illustrate the time domain position of the enhanced synchronization signal in detail, the OFDM symbol occupied by the enhanced synchronization signal is illustrated in the following with reference to fig. 4(a) -4 (e) and fig. 5(a) -5 (c). Fig. 4(f) and 5(d) are illustrations of fig. 4(a) to 4(e) and fig. 5(a) to 5(c), respectively.

In fig. 4(a) -4 (e), the enhanced synchronization signal, the downlink CRS, is used for downlink CRS, but the downlink PDCCH is not used for downlink CRS. 4(a), 4(b) and 4(c) the prior art synchronization signal is enhanced by 4 times; FIG. 4(d) prior art synchronization signal enhancement by a factor of 4.5; fig. 4(e) prior art sync signal enhancement is 5 times.

In fig. 5(a) -5 (c), the enhanced synchronization signal is transmitted without using the legacy CRS and PDCCH, and the enhanced synchronization signal and the CRS are transmitted without colliding with each other (i.e., the enhanced synchronization signal is mapped within the CRS-free OFDM symbol). Fig. 5(a) prior art synchronization signal enhancement is 4 times; fig. 5(b) prior art synchronization signal enhancement by a factor of 4.5; fig. 5(c) prior art synchronization signal enhancement is 5 times.

And for convenience of illustration, in fig. 4(a) -4 (e) and fig. 5(a) -5 (c), the enhanced synchronization signal is transmitted only in the central 6 PRB pairs of the system bandwidth, and the diagram of only one of the PRB pairs is shown (the other 5 are the same). In the figure, each small lattice refers to one RE.

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes an occupied resource size of the eDRS, the occupied resource size is used to indicate that the time-frequency resource occupied by the enhanced physical broadcast channel is n times of the time-frequency resource occupied by the existing physical broadcast channel, and a value of n is a second specified value.

When the time-frequency resource occupied by the enhanced physical broadcast channel is n times of the time-frequency resource occupied by the existing physical broadcast channel, the existing physical broadcast channel repeatedly transmits for n +1 times, namely the existing physical broadcast channel is enhanced by n +1 times.

Wherein the second specified value may be any non-negative number.

In order to cover the coverage enhancement of the physical broadcast channel of the enhanced user, the repeated transmission of a certain multiple of the existing physical broadcast channel is realized by transmitting the enhanced physical broadcast channel. The size of the resource occupied by the enhanced physical broadcast channel depends on the cell coverage capability, that is, the number of times of the repeated transmission of the existing physical broadcast channel depends on the coverage enhancement capability of one cell. Based on the enhanced cell coverage capability {0, 4, 8} dB, the MF-PBCH is correspondingly enhanced by {0, 4, 8} dB, the maximum number of repeated transmissions with the MF-PBCH may be 6 times (n is 5), 6.5 times (n is 5.5), or 7 times (n is 6), that is, the resource size of the enhanced synchronization signal is 5 times, 5.5 times, or 6 times that of the existing MF-PBCH.

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain location of the eDRS, the frequency domain location is used to indicate the frequency domain location of the enhanced physical broadcast channel in a system bandwidth, and the enhanced physical broadcast channel may be located on the central 6 physical resource block pairs of the system bandwidth or may be located on the non-central 6 PRB pairs of the system bandwidth.

The frequency domain location relationship of the enhanced MF-PBCH to the existing MF-PBCH is further explained. When the enhanced MF-PBCH is located on the central 6 PRB pairs of the system bandwidth, the enhanced MF-PBCH and the existing MF-PBCH may not be in the same TTI or in the same TTI. When the enhanced MF-PBCH is located on the non-central 6 PRB pairs of the system bandwidth, the enhanced MF-PBCH and the existing MF-PBCH may not be in the same TTI or in the same TTI.

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced physical broadcast channel and the information of the time-frequency resource includes a time-domain location of the eDRS, the time-domain location is used to indicate the time-domain location of the enhanced physical broadcast channel, and the enhanced physical broadcast channel may occupy any one orthogonal frequency division multiplexing symbol or may occupy a second specified orthogonal frequency division multiplexing symbol.

Wherein the second designated orthogonal frequency division multiplexing symbol represents a symbol that does not contain a cell reference signal.

Wherein the cell reference signal at least comprises an existing cell reference signal. Or, the cell reference signal includes an existing cell reference signal and an enhanced cell reference signal.

It should be noted that, when transmitting the enhanced MF-PBCH, if the OFDM symbol carrying the existing MF-PBCH does not contain CRS, the enhanced MF-PBCH may be mapped to the OFDM symbol without CRS; or mapping to OFDM symbols containing CRS, and simultaneously, using the pure CRS. If the OFDM symbol carrying the existing MF-PBCH contains CRS, the enhanced MF-PBCH is mapped to the OFDM symbol containing CRS or not containing CRS. For an OFDM symbol containing CRS, the CRS may be repeatedly transmitted in corresponding time-frequency resources, or not transmitted.

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced synchronization signal and an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain position of the eDRS, if both the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on the central 6 physical resource block pairs of the system bandwidth, the transmission priority of the enhanced synchronization signal is higher than the transmission priority of the enhanced physical broadcast channel.

When the transmission priority of the enhanced synchronization signal is higher than that of the enhanced physical broadcast channel, the system preferentially transmits the enhanced synchronization signal using all available resources as much as possible, and then starts to transmit the enhanced MF-PBCH. I.e. the transmission of the enhanced synchronization signal takes precedence over the enhanced MF-PBCH.

Further, with reference to the foregoing method flow, when the eDRS includes an enhanced synchronization signal and an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain position of the time-frequency resource, if the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on the central 6 physical resource block pairs or the non-central 6 physical resource block pairs of the system bandwidth, a transmission priority of the enhanced synchronization signal is the same as a transmission priority of the enhanced physical broadcast channel.

When the transmission priority of the enhanced synchronization signal is the same as that of the enhanced physical broadcast channel, the system transmits the enhanced synchronization signal and the enhanced MF-PBCH in parallel.

To make the transmission situation of e-Sync and enhanced MF-PBCH easier to understand, the mapping of e-Sync and enhanced MF-PBCH is exemplified by fig. 6(a) -6 (c), 7(a), 7(b), 8(a), 8(b), 9(a), 9(b) based on different existing synchronization signal enhancement factors and existing MF-PBCH enhancement factors. Fig. 6(d), 7(c), 8(c), and 9(c) are illustrations of fig. 6(a) to 6(c), 7(a) to 7(b), 8(a) to 8(b), and 9(a) to 9(b), respectively. For convenience of illustration, in fig. 6(a) -6 (c), 7(a), 7(b), 8(a), 8(b), 9(a) and 9(b), the enhanced synchronization signal is transmitted only in the central 6 PRB pairs of the system bandwidth, and only one of the PRB pairs is illustrated (the other 5 are the same).

In fig. 6(a) -6 (c), the existing synchronization signal is enhanced by 4 times, and the existing MF-PBCH is enhanced by 6 times. In fig. 7(a), 7(b), the existing synchronization signal is enhanced by 4.5 times, and the existing MF-PBCH is enhanced by 6 times. In fig. 8(a), 8(b), the existing synchronization signal is enhanced by 4.5 times, and the existing MF-PBCH is enhanced by 7 times. In fig. 9(a), 9(b), the existing synchronization signal is enhanced by 5 times, and the existing MF-PBCH is enhanced by 6.5 times.

Wherein eMF-PBCH in the figure is divided into a plurality of parts and is identified by eMF-

PBCH #

1, 2, 3 and 4 ….

In the above illustration, except for the TTI including the existing DRS, other TTIs including eDRS may be transmitted within the non-central 6 PRB pairs in one TTI according to the existing pattern. Therefore, the time-frequency resources for transmitting eDRS may be obtained by only time domain spreading, may also be obtained by only frequency domain spreading (i.e. not the central 6 PRBs), and may also be obtained by spreading in both time domain and frequency domain. Wherein, the TTI containing eDRS can also contain the existing DRS.

Further, with reference to the foregoing method flow, when the information of the time-frequency resource includes the time-domain location of the time-frequency resource, the relative time relationship between the eDRS and the existing DRS is fixed; or flexibly change according to time criteria.

Wherein the time criteria include a point in time when a listen-before-talk mechanism succeeds and the eDRS available period.

It should be noted that, in order to implement DRS coverage enhancement for coverage-enhanced users, the transmission time of eDRS may be greater than 1 TTI.

The relative temporal relationship between the existing DRS and eDRS may be fixed. For example, the existing DRS is always transmitted first, and then the eDRS is transmitted, and considering that there is another data channel to be transmitted, the existing DRS is always transmitted in TTI0 or TTI5, and then the eDRS is transmitted in a TTI subsequent to TTI0 or TTI5, as shown in fig. 10. It is further explained that the existing DRS can start at any one TTI if there is no user specific data.

The relative time relationship between the existing DRS and the eDRS is flexible and variable, and can be flexibly changed according to the time point when the listen-before-talk mechanism succeeds and the time criterion of the available time period of the eDRS. However, in order to reduce the complexity of blind detection of the user, the relative time relationship between the existing DRS and eDRS may be defined. As shown in fig. 11(a), 11(b), 11(c), and 11(d), the relative time relationship between the existing DRS and eDRS may vary depending on the time point at which LBT succeeds. In fig. 11(a), 11(b), 11(c), and 11(d), it is assumed that eDRS occupies 4 TTIs in the time domain, and conventional DRS occupies 1 TTI and can transmit only in TTI #0 and TTI # 5.

In fig. 11(a), after LBT is successful, eNB starts downlink transmission from TTI # 1. Since the existing DRS can only be transmitted in TTI #0/5, the eDRS is transmitted in advance to TTIs #1- # 4.

In fig. 11(b), after LBT is successful, eNB starts downlink transmission from TTI # 2. The 2 nd to 4 th parts of the eDRS are placed on TTIs #2- #4 to transmit first, then the existing DRS is transmitted, and then the 1 st part of the eDRS is transmitted.

In fig. 11(c), the eNB starts downlink transmission from TTI #3 after LBT is successful. The 3 rd to 4 th parts of the eDRS are placed on TTIs #3- #4 to transmit first, then the existing DRS is transmitted, and then the 1 st and 2 nd parts of the eDRS are transmitted.

In fig. 11(d), the eNB starts downlink transmission from TTI #4 after LBT is successful. The 4 th part of the eDRS is placed on TTI #4 to transmit first, then the existing DRS is transmitted, and then the 1 st part to the 3 rd part of the eDRS are transmitted.

Further, in combination with the foregoing method procedure, after the terminal receives the eDRS, because the relative time relationship between the eDRS and the existing DRS is flexibly changed, after the terminal receives the eDRS, blind detection needs to be performed to decode the eDRS. Therefore, another possible implementation manner of the embodiment of the present invention further provides the following method flow, as shown in fig. 12, after step 104, including:

105. and the terminal performs blind detection on the received eDRS so as to decode the eDRS.

Based on the above embodiments, it should be noted that the coverage enhancement user receives the existing DRS within a sounding reference signal Measurement Configuration (DMTC) window. And the base station may transmit the eDRS within the DMTC or outside the DMTC. It should be noted that, when the base station transmits the eDRS outside the DMTC, the coverage enhancement user does not need to combine the existing DRSs inside the DMTC, and may perform decoding only based on the eDRS outside the DMTC.

An embodiment of the present invention provides an enhanced apparatus for sounding reference signal mapping, which is applicable to a base station operating in an unlicensed frequency band and is applicable to the above method flow, and as shown in fig. 13, the apparatus includes:

a determining unit 21, configured to determine, according to a cell coverage enhancement capability, information of a time-frequency resource used to carry an enhanced sounding Reference Signal (eDRS), where the eDRS includes one or more of an enhanced synchronization Signal, an enhanced Reference Signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS.

And a mapping unit 22, configured to map the eDRS according to the information of the time-frequency resource.

A sending unit 23, configured to send the time-frequency resource mapped with the eDRS to a terminal.

Optionally, when the information of the time-frequency resource includes a size of an occupied resource of the eDRS, the size of the occupied resource depends on a level of a cell coverage enhancement capability.

Optionally, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a size of an occupied resource of the eDRS, the size of the occupied resource is used to indicate that the time-frequency resource occupied by the enhanced synchronization signal is m times of the time-frequency resource occupied by an existing synchronization signal, and a value of m is a first specified value.

Optionally, when the eDRS includes enhanced synchronization signals and the information of the time-frequency resources includes frequency-domain locations of the eDRS, the frequency-domain locations are used to indicate that the enhanced synchronization signals are located on the central 6 physical resource block pairs of the system bandwidth.

Optionally, when the eDRS includes enhanced synchronization signals and the information of the time-frequency resources includes frequency-domain locations of the eDRS, the frequency-domain locations are used to indicate that the enhanced synchronization signals are located on non-central 6 physical resource block pairs of a system bandwidth.

Optionally, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced synchronization signal occupies any one orthogonal frequency division multiplexing symbol.

Optionally, when the eDRS includes an enhanced synchronization signal, and the information of the time-frequency resource includes a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced synchronization signal occupies a first designated orthogonal frequency division multiplexing symbol.

Optionally, the first specified ofdm symbol represents a symbol that does not include a cell reference signal or a symbol that does not include a physical downlink control channel or a symbol that does not include a cell reference signal and a physical downlink control channel; the cell reference signal comprises at least an existing cell reference signal; the physical downlink control channel at least comprises the existing physical downlink control channel.

Optionally, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a size of an occupied resource of the eDRS, the size of the occupied resource is used to indicate that the time-frequency resource occupied by the enhanced physical broadcast channel is n times of the time-frequency resource occupied by an existing physical broadcast channel, and a value of n is a second specified value.

Optionally, when the eDRS includes an enhanced physical broadcast channel and the information of the time-frequency resource includes a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced physical broadcast channel is located on the center 6 physical resource block pairs of the system bandwidth.

Optionally, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced physical broadcast channel is located on a non-central 6 physical resource block pairs of a system bandwidth.

Optionally, when the eDRS includes an enhanced physical broadcast channel and the information of the time-frequency resource includes a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced physical broadcast channel occupies any one orthogonal frequency division multiplexing symbol.

Optionally, when the eDRS includes an enhanced physical broadcast channel, and the information of the time-frequency resource includes a time-domain location of the eDRS, the time-domain location is used for the enhanced physical broadcast channel to occupy a second designated orthogonal frequency division multiplexing symbol.

Optionally, the second designated orthogonal frequency division multiplexing symbol represents a symbol without a cell reference signal; the cell reference signal includes at least an existing cell reference signal.

Optionally, when the eDRS includes an enhanced synchronization signal and an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain position of the eDRS, if both the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on a central 6 physical resource block pair of a system bandwidth, a transmission priority of the enhanced synchronization signal is higher than a transmission priority of the enhanced physical broadcast channel.

Optionally, when the eDRS includes an enhanced synchronization signal and an enhanced physical broadcast channel, and the information of the time-frequency resource includes a frequency domain position of the time-frequency resource, if the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on the central 6 physical resource block pairs or the non-central 6 physical resource block pairs of the system bandwidth, a transmission priority of the enhanced synchronization signal is the same as a transmission priority of the enhanced physical broadcast channel.

Optionally, when the information of the time-frequency resource includes a time-domain position of the time-frequency resource, a relative time relationship between the eDRS and an existing sounding reference signal (DRS) is fixed.

Optionally, when the information of the time-frequency resource includes a time-domain location of the time-frequency resource, a relative time relationship between the eDRS and the DRS is flexibly changed according to a time criterion.

Optionally, the time criterion includes a time point when a listen-before-talk mechanism succeeds and the eDRS available period.

The embodiment of the invention provides a device for mapping enhanced sounding reference signals, aiming at a communication system working in an unauthorized frequency band, introducing more time-frequency resources to bear the enhanced sounding reference signals according to information of the time-frequency resources for bearing the enhanced sounding reference signals, and completing transmission of eDRS through interaction of a base station and a terminal, thereby realizing repeated transmission of the sounding reference signals on time frequency, improving the energy of the sounding reference signals and realizing coverage enhancement of the sounding reference signals.

An embodiment of the present invention provides an enhanced apparatus for mapping a sounding reference signal, which is suitable for a terminal operating in an unlicensed frequency band, and is suitable for the above method flow, as shown in fig. 14, where the apparatus includes:

a receiving unit 31, configured to receive the eDRS sent by the base station according to the information of the time-frequency resource.

Optionally, as shown in fig. 15, the apparatus further includes:

a blind detection unit 32, configured to perform blind detection on the received eDRS to decode the eDRS.

An enhanced apparatus for sounding reference signal mapping is provided in an embodiment of the present invention, and is suitable for a base station operating in an unlicensed frequency band, as shown in fig. 16, the apparatus includes a processor 41, a memory 42, and a transceiver 43; the processor 41, memory 42 and transceiver 43 communicate via a bus; the memory 42 has computer code configured therein that the processor 41 can invoke to control the transceiver 43.

The processor 41 is configured to determine, through the transceiver 43, information of a time-frequency resource used for carrying an enhanced sounding Reference Signal (eDRS) according to a cell coverage enhancement capability, where the eDRS includes one or more of an enhanced synchronization Signal, an enhanced Reference Signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS.

The processor 41 is configured to map the eDRS through the transceiver 43 according to the information of the time-frequency resource.

The processor 41 is configured to send the time-frequency resource mapped with the eDRS to a terminal through the transceiver 43.

An enhanced apparatus for sounding reference signal mapping is provided in an embodiment of the present invention, and is suitable for a terminal operating in an unlicensed frequency band, as shown in fig. 17, the apparatus includes a processor 51, a memory 52, and a transceiver 53; the processor 51, the memory 52 and the transceiver 53 communicate through a bus; the memory 52 has computer code configured therein that the processor 51 can invoke to control the transceiver 53.

The processor 51 is configured to receive the eDRS sent by the base station through the transceiver 53 according to the information of the time-frequency resource.

Optionally, the processor 51 is further configured to perform blind detection on the received eDRS through the transceiver 53 to decode the eDRS.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for enhanced sounding reference signal mapping, adapted to a base station operating in an unlicensed frequency band, the method comprising:

determining information of time-frequency resources used for bearing enhanced sounding reference signals eDRS according to cell coverage enhancement capability, wherein the eDRS comprises one or more of enhanced synchronization signals, enhanced reference signals, enhanced physical broadcast channels and enhanced data channels, and the information of the time-frequency resources comprises one or more of occupied resource size, frequency domain position and time domain position of the eDRS;

mapping the eDRS according to the information of the time-frequency resource;

sending the time-frequency resource mapped with the eDRS to a terminal;

when the eDRS comprises an enhanced synchronization signal and the information of the time-frequency resource comprises the size of the occupied resource of the eDRS, the size of the occupied resource is used for indicating that the time-frequency resource occupied by the enhanced synchronization signal is m times of the time-frequency resource occupied by the existing synchronization signal, and the value of m is a first designated value;

when the eDRS comprises an enhanced physical broadcast channel and the information of the time-frequency resource comprises the size of the occupied resource of the eDRS, the size of the occupied resource is used for indicating that the time-frequency resource occupied by the enhanced physical broadcast channel is n times of the time-frequency resource occupied by the existing physical broadcast channel, and the value of n is a second specified value.

2. The method of claim 1, wherein when the information about the time-frequency resources comprises a size of occupied resources of the eDRS, the size of the occupied resources depends on a level of cell coverage enhancement capability.

3. The method of claim 1, wherein when the eDRS comprises enhanced synchronization signals and the information for the time-frequency resources comprises frequency domain locations of the eDRS, the frequency domain locations are used to indicate that the enhanced synchronization signals are located on the center 6 physical resource block pairs of a system bandwidth.

4. The method of claim 1, wherein when the eDRS comprises enhanced synchronization signals and the information for the time-frequency resources comprises frequency domain locations of the eDRS, the frequency domain locations are used to indicate that the enhanced synchronization signals are located on non-center 6 physical resource block pairs of a system bandwidth.

5. The method of claim 1, wherein when the eDRS comprises an enhanced synchronization signal and the information about the time-frequency resources comprises a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced synchronization signal occupies any one orthogonal frequency division multiplexing symbol.

6. The method of claim 1, wherein when the eDRS comprises an enhanced synchronization signal and the information about the time-frequency resources comprises a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced synchronization signal occupies a first designated orthogonal frequency division multiplexing symbol.

7. The method of claim 6, wherein the first designated OFDM symbol represents a symbol without a cell reference signal or a symbol without a physical downlink control channel or a symbol without a cell reference signal and a physical downlink control channel;

the cell reference signal comprises at least an existing cell reference signal;

8. The method of claim 1, wherein when the eDRS comprises an enhanced physical broadcast channel, the information for the time-frequency resources comprises a frequency domain location of the eDRS, the frequency domain location indicating that the enhanced physical broadcast channel is located on a center 6 physical resource block pair of a system bandwidth.

9. The method of claim 1, wherein when the eDRS comprises an enhanced physical broadcast channel and the information for the time-frequency resources comprises a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced physical broadcast channel is located on a non-center 6 physical resource block pair of a system bandwidth.

10. The method of claim 1, wherein when the eDRS comprises an enhanced physical broadcast channel and the information about the time-frequency resources comprises a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced physical broadcast channel occupies any one orthogonal frequency division multiplexing symbol.

11. The method of claim 1, wherein when the eDRS comprises an enhanced physical broadcast channel and the information for the time-frequency resources comprises a time-domain location of the eDRS, the time-domain location is used for the enhanced physical broadcast channel to occupy a second designated orthogonal frequency division multiplexing symbol.

12. The method of claim 11, wherein the second designated orthogonal frequency division multiplexing symbol represents a symbol that does not contain a cell reference signal;

the cell reference signal includes at least an existing cell reference signal.

13. The method of claim 1, wherein when the eDRS comprises an enhanced synchronization signal and an enhanced physical broadcast channel, and the information on the time-frequency resources comprises a frequency domain location of the eDRS, if the enhanced synchronization signal and the enhanced physical broadcast channel are both transmitted on a central 6 physical resource block pairs of a system bandwidth, the enhanced synchronization signal transmission priority is higher than a transmission priority of the enhanced physical broadcast channel.

14. The method of claim 1, wherein when the eDRS comprises an enhanced synchronization signal and an enhanced physical broadcast channel and the information on the time-frequency resources comprises frequency-domain locations of the time-frequency resources, if the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on a central 6 physical resource block pairs or a non-central 6 physical resource block pairs of a system bandwidth, the enhanced synchronization signal transmission priority is the same as the transmission priority of the enhanced physical broadcast channel.

15. The method of claim 1, wherein when the information for the time-frequency resources comprises time-domain locations of the time-frequency resources, a relative time relationship of the eDRS to existing sounding reference signals (DRSs) is fixed.

16. The method of claim 1, wherein when the information about the time-frequency resources comprises time-domain locations of the time-frequency resources, a relative time relationship between the eDRS and the DRS is flexibly changed according to a time criterion.

17. The method of claim 16, wherein the temporal criteria comprise a point in time at which a listen before talk mechanism is successful and the eDRS available time period.

18. A method for enhanced sounding reference signal mapping, adapted to a terminal operating in an unlicensed frequency band, the method comprising:

receiving eDRS sent by a base station according to information of time-frequency resources, wherein the eDRS comprises one or more of an enhanced synchronization signal, an enhanced reference signal, an enhanced physical broadcast channel and an enhanced data channel, and the information of the time-frequency resources comprises one or more of the size of occupied resources, the position of a frequency domain and the position of a time domain of the eDRS;

19. The method of claim 18, wherein after receiving the eDRS transmitted by the base station, the method further comprises:

and performing blind detection on the received eDRS to decode the eDRS.

20. An apparatus for enhanced sounding reference signal mapping, adapted to a base station operating in an unlicensed frequency band, the apparatus comprising:

a determining unit, configured to determine, according to a cell coverage enhancement capability, information of a time-frequency resource used for carrying an enhanced sounding reference signal eDRS, where the eDRS includes one or more of an enhanced synchronization signal, an enhanced reference signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS;

a sending unit, configured to send the time-frequency resource mapped with the eDRS to a terminal;

21. The apparatus of claim 20, wherein when the information for the time-frequency resources comprises a size of occupied resources for the eDRS, the size of the occupied resources depends on a level of cell coverage enhancement capability.

22. The apparatus of claim 20, wherein when the eDRS comprises an enhanced synchronization signal and the information for the time-frequency resources comprises a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced synchronization signal is located on a center 6 physical resource block pairs of a system bandwidth.

23. The apparatus of claim 20, wherein when the eDRS comprises an enhanced synchronization signal and the information for the time-frequency resources comprises a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced synchronization signal is located on a non-center 6 physical resource block pairs of a system bandwidth.

24. The apparatus of claim 20, wherein when the eDRS comprises an enhanced synchronization signal and the information on the time-frequency resources comprises a time-domain location of the eDRS, the time-domain location is used to indicate that the enhanced synchronization signal occupies any one orthogonal frequency division multiplexing symbol.

25. The apparatus of claim 20, wherein when the eDRS comprises an enhanced synchronization signal and the information for the time-frequency resources comprises a time domain location of the eDRS, the time domain location is used to indicate that the enhanced synchronization signal occupies a first designated orthogonal frequency division multiplexing symbol.

26. The apparatus of claim 25, wherein the first designated orthogonal frequency division multiplexing symbol represents a symbol without a cell reference signal or a symbol without a physical downlink control channel or a symbol without a cell reference signal and a physical downlink control channel;

the cell reference signal comprises at least an existing cell reference signal;

27. The apparatus of claim 20, wherein when the eDRS comprises an enhanced physical broadcast channel, the information for the time-frequency resources comprises a frequency domain location of the eDRS, the frequency domain location indicating that the enhanced physical broadcast channel is located on a center 6 physical resource block pair of a system bandwidth.

28. The apparatus of claim 20, wherein when the eDRS comprises an enhanced physical broadcast channel and the information for the time-frequency resources comprises a frequency domain location of the eDRS, the frequency domain location is used to indicate that the enhanced physical broadcast channel is located on a non-center 6 physical resource block pair of a system bandwidth.

29. The apparatus of claim 20, wherein when the eDRS comprises an enhanced physical broadcast channel and the information on the time-frequency resources comprises a time domain location of the eDRS, the time domain location is used to indicate that the enhanced physical broadcast channel occupies any one orthogonal frequency division multiplexing symbol.

30. The apparatus of claim 20, wherein when the eDRS comprises an enhanced physical broadcast channel and the information for the time-frequency resources comprises a time domain location of the eDRS, the time domain location is for the enhanced physical broadcast channel to occupy a second designated orthogonal frequency division multiplexing symbol.

31. The apparatus of claim 30, wherein the second designated orthogonal frequency division multiplexing symbol represents a symbol that does not contain a cell reference signal;

the cell reference signal includes at least an existing cell reference signal.

32. The apparatus of claim 20, wherein when the eDRS comprises an enhanced synchronization signal and an enhanced physical broadcast channel, and the information on the time-frequency resources comprises a frequency domain location of the eDRS, if the enhanced synchronization signal and the enhanced physical broadcast channel are both transmitted on a center 6 physical resource block pairs of a system bandwidth, the enhanced synchronization signal transmission priority is higher than a transmission priority of the enhanced physical broadcast channel.

33. The apparatus of claim 20, wherein when the eDRS comprises an enhanced synchronization signal and an enhanced physical broadcast channel, and the information on the time-frequency resources comprises frequency-domain locations of the time-frequency resources, if the enhanced synchronization signal and the enhanced physical broadcast channel are transmitted on a central 6 physical resource block pairs or a non-central 6 physical resource block pairs of a system bandwidth, the enhanced synchronization signal transmission priority is the same as the transmission priority of the enhanced physical broadcast channel.

34. The apparatus of claim 20, wherein when the information for the time-frequency resources comprises time-domain locations of the time-frequency resources, a relative time relationship of the eDRS to existing sounding reference signals (DRS) is fixed.

35. The apparatus of claim 20, wherein when the information about the time-frequency resources comprises time-domain locations of the time-frequency resources, a relative time relationship between the eDRS and the DRS is flexibly changed according to a time criterion.

36. The apparatus of claim 35, wherein the temporal criteria comprise a point in time at which a listen before talk mechanism is successful and the eDRS available time period.

37. An apparatus for enhanced sounding reference signal mapping, adapted to a terminal operating in an unlicensed frequency band, the apparatus comprising:

a receiving unit, configured to receive an eDRS sent by a base station according to information of a time-frequency resource, where the eDRS includes one or more of an enhanced synchronization signal, an enhanced reference signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain position, and a time domain position of the eDRS;

38. The apparatus of claim 37, wherein after receiving the eDRS transmitted by the base station, the apparatus further comprises:

39. An apparatus for enhanced sounding reference signal mapping, adapted for a base station operating in an unlicensed frequency band, the apparatus comprising a processor, a memory, and a transceiver; the processor, the memory and the transceiver communicate through a bus; the memory has computer code configured therein that the processor can invoke to control the transceiver;

the processor is configured to determine, by the transceiver, information of a time-frequency resource for carrying an enhanced sounding reference signal eDRS according to a cell coverage enhancement capability, where the eDRS includes one or more of an enhanced synchronization signal, an enhanced reference signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resource includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS;

the processor is configured to send the time-frequency resource mapped with the eDRS to a terminal through the transceiver;

40. An apparatus for enhanced sounding reference signal mapping, adapted for a terminal operating in an unlicensed frequency band, the apparatus comprising a processor, a memory, and a transceiver; the processor, the memory and the transceiver communicate through a bus; the memory has computer code configured therein that the processor can invoke to control the transceiver;

the processor is configured to receive, by the transceiver, eDRS transmitted by a base station according to information of time-frequency resources, where the eDRS includes one or more of an enhanced synchronization signal, an enhanced reference signal, an enhanced physical broadcast channel, and an enhanced data channel, and the information of the time-frequency resources includes one or more of an occupied resource size, a frequency domain location, and a time domain location of the eDRS;