CN112737742B

CN112737742B - Demodulation reference signal configuration indication method and terminal

Info

Publication number: CN112737742B
Application number: CN201910975226.6A
Authority: CN
Inventors: 纪子超; 刘思綦; 邬华明; 彭淑燕
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2023-04-25
Anticipated expiration: 2039-10-14
Also published as: CN112737742A

Abstract

The invention provides a demodulation reference signal configuration indication method and a terminal, and relates to the technical field of communication. The demodulation reference signal configuration indication method is applied to a terminal and comprises the following steps: when the side link channel transmission is carried out, the control information indicates a first demodulation reference signal (DMRS) pattern adopted by the side link channel transmission; wherein the first DMRS pattern belongs to one of the available DMRS patterns configured for the resource pool. According to the scheme, the DMRS pattern adopted by the transmission of the side link channel is indicated in the control information, so that the detection complexity of the terminal can be reduced, and the accurate transmission of the information is ensured.

Description

Demodulation reference signal configuration indication method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a demodulation reference signal configuration indication method and a terminal.

Background

A New air interface (NR) Sidelink (SL, which may also be referred to as a direct communication link/Sidelink) supports multiple time Domain (DMRS) demodulation reference signal (De-Modulation Reference Signal, DMRS) patterns (patterns), and a transmitting terminal (TX UE) may dynamically use the multiple DMRS patterns for data transmission. However, the receiving terminal does not know which DMRS pattern is specifically implemented by the transmitting terminal to perform data transmission, so that the receiving terminal can respectively utilize different DMRS patterns to perform demodulation, thereby increasing the complexity of terminal detection.

Disclosure of Invention

The embodiment of the invention provides a demodulation reference signal configuration indication method and a terminal, which are used for solving the problem of high complexity of terminal detection caused by the fact that a receiving terminal does not know which DMRS pattern is specifically used by a sending terminal for data transmission in the prior SL communication.

In order to solve the technical problems, the embodiment of the invention adopts the following scheme:

in a first aspect, an embodiment of the present invention provides a method for indicating configuration of a demodulation reference signal, which is applied to a terminal, and includes:

when the side link channel transmission is carried out, the control information indicates a first demodulation reference signal (DMRS) pattern adopted by the side link channel transmission;

wherein the first DMRS pattern belongs to one of the available DMRS patterns configured for the resource pool.

In a second aspect, an embodiment of the present invention further provides a terminal, including:

a transmission module, configured to instruct, when performing the sidelink channel transmission, a first demodulation reference signal DMRS pattern adopted by the sidelink channel transmission through control information;

In a third aspect, an embodiment of the present invention further provides a terminal, including: the method comprises the steps of a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the computer program is executed by the processor to realize the method for indicating the demodulation reference signal configuration.

In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores a computer program, where the computer program when executed by a processor implements the steps of the demodulation reference signal configuration indication method described above.

The beneficial effects of the invention are as follows:

according to the scheme, the DMRS pattern adopted by the transmission of the side link channel is indicated in the control information, so that the detection complexity of the terminal can be reduced, and the accurate transmission of the information is ensured.

Drawings

FIG. 1 is a schematic diagram showing one TDD configuration period for every 5 slots;

FIG. 2 is a schematic diagram showing one TDD configuration period per slot;

fig. 3 is a flowchart illustrating a method for indicating configuration of demodulation reference signals according to an embodiment of the present invention;

FIG. 4 shows a schematic diagram of a reference point of Bitmap based on a first symbol of a slot;

FIG. 5 shows a diagram of a Bitmap reference point based on a first side link symbol in a slot;

FIG. 6 shows a schematic block diagram of a terminal according to an embodiment of the invention;

fig. 7 is a block diagram showing the structure of a terminal according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the drawings and the specific embodiments thereof in order to make the objects, technical solutions and advantages of the present invention more apparent.

In describing embodiments of the present invention, some concepts used in the following description are first explained.

A physical sidelink broadcast channel (Physical Sidelink Broadcast Channel, PSBCH) may be used to carry configuration information of the SL, and when a User Equipment (UE, also called a terminal) moves to the cell edge (as judged by the link quality between the base station and the UE), the PSBCH may be periodically transmitted to inform out of coverage UE/partial coverage UE the system of the configuration information of the SL, such as the system bandwidth, time Division Duplex (TDD) configuration information of the system, etc., but no SL DMRS configuration related information is currently included.

The Side Link Synchronization Signal (SLSS) and the PSBCH form a side link synchronization signal block (S-SSB), and the transmission mode is always to transmit by taking the S-SSB as a whole.

The TDD configuration of the interface between the New Radio (NR) terminal and the network (i.e., uu interface) (including uplink and downlink) in Release 15 may be semi-static or dynamic.

For semi-static configuration, a TDD configuration period may be configured, and as shown in fig. 1 and 2, the first half slot/symbol (slot/symbol) in one period may be used as DL resource, and the time domain length of the resource may be configurable; the latter half slot/symbol in one period can be used as UL resource, and the time domain length of the resource can be configured; the slot/symbol resources located in the middle of the period can be regarded as flexible resources, for which part the resources can be further configured as DL/UL resources by means of user specific configuration parameters (UE-specific configuration).

For dynamic configuration, which symbols are used for DL transmission and which are used for UL transmission can be dynamically configured on the basis of which semi-statically are configured as Flexible slot resources.

For TDD configuration of SL, it may be assumed that some/some of UL, flexible, DL resources may be further configured as SL resources, e.g. UL resources may be further configured as SL resources. As for the SL TDD configuration, either a semi-static configuration or a dynamic configuration is used, there is still no consensus.

In UL/DL transmission, the DMRS pattern may be a predefined fixed pattern, and the UE may complete demodulation of data when it is supposed that the predefined DMRS pattern is transmitting and receiving data.

In LTE SL transmission, DMRS is also a predefined fixed pattern, and the UE can complete demodulation of data when assuming that the predefined DMRS pattern is used to transmit and receive data.

In UL/DL transmission, DMRS patterns may also have multiple patterns, and the control node may directly configure a DMRS pattern for the UE, where the configuration of the pattern may be accomplished through higher layer signaling (e.g., RRC signaling sent by the base station to the UE), and the UE may assume that the predefined DMRS pattern can complete demodulation of data when receiving and transmitting data.

The invention provides a demodulation reference signal configuration indication method and a terminal, aiming at the problem of high complexity of terminal detection caused by the fact that a receiving terminal does not know which DMRS pattern is specifically used by a transmitting terminal for data transmission in the prior SL communication.

As shown in fig. 3, an embodiment of the present invention provides a demodulation reference signal configuration indication method, which is applied to a terminal and includes:

step 301, when a side link channel transmission is performed, indicating a first demodulation reference signal DMRS pattern adopted by the side link channel transmission through control information;

wherein the first DMRS pattern belongs to one of the available DMRS patterns configured for the resource pool; the side link channel includes at least: physical side link shared channel (PSSCH).

It should be further noted that the control information mainly refers to a side link control information (SCI).

In the following, control information is SCI, and a side link channel is PSSCH.

Before PSSCH transmission, the terminal needs to transmit the DMRS pattern adopted by the PSSCH transmission, and defines the specific DMRS pattern adopted by the transmitting end for transmitting data, so that the complexity of detection at the receiving end can be reduced.

It should be further noted that, the terminal may be a transmitting end in the side link communication, that is, before the transmitting end performs PSSCH transmission, the terminal indicates, through SCI, a DMRS pattern adopted by PSSCH transmission; or, the terminal may also be a receiving end in the side link communication, that is, before the receiving end receives the PSSCH, the receiving end receives the SCI sent by the sending end, obtains the DMRS pattern adopted for the PSSCH sending indicated by the SCI, and the receiving end receives the PSSCH through the DMRS pattern specified by the SCI.

It should be noted that, in the embodiment of the present invention, a manner of newly defining multiple DMRS patterns and acquiring a specific DMRS pattern used for PSSCH transmission by using an SCI notification manner may be adopted, or a manner of presetting multiple DMRS patterns known to both a transmitting end and a receiving end and indicating the DMRS pattern used for PSSCH transmission by using the SCI notification manner may be adopted, and the following two implementation manners are respectively described in detail.

Mode one, a mode in which a plurality of DMRS patterns are preset to be known by both a transmitting end and a receiving end, and a mode in which a DMRS pattern used for PSSCH transmission is indicated by a SCI notification mode

It should be noted that, in this implementation, the DMRS pattern configuration (i.e., the distribution form of the DMRS over the symbols in the time unit) is obtained by at least one of the following:

A11, indicating by a bit map (bitmap);

in this way, whether each symbol (symbol) carries a DMRS is indicated directly by the bitmap, for example, '1' in the bitmap indicates that the corresponding symbol carries a DMRS, and '0' indicates that the corresponding symbol does not carry a DMRS.

In this case, the length of the bitmap satisfies at least one of the following:

a111, the length of the bit map changes with the number of symbols in the time unit;

it should be noted that, in the embodiment of the present invention, the time unit may be a slot, that is, have 14 symbols, or may be a micro slot, that is, less than 14 symbols, in this case, the bit map has the same length as the number of symbols in the time unit, for example, for a slot having 14 symbols, the length of the corresponding bit map is 14 bits.

A112, the length of the bit map is the fixed number of symbols supported in the time unit;

it should be noted that the fixed number of symbols may be the number of maximum symbols supported in a time unit, for example, when the number of maximum symbols supported in a slot in NR is 14, the bit map has a length of 14 bits; when the minislot is divided, the maximum number of symbols supported by the minislot is 8, and the bit map is 8 bits in length.

A113, the length of the bit map is the number of side link symbols in the time unit;

in this case, the length of the bit map corresponds to the number of side link symbols, for example, 6 symbols out of 14 symbols in one slot are for side link, that is, the number of side link symbols is 6, and the length of the bit map is 6 bits.

A114, the length of the bit bitmap is the maximum number of the DMRS time domain symbols;

for example, defining symbols 2,4, 6, 8, 10, and 12 where DMRS may occur, the maximum number of DMRS time domain symbols (Lmax) is 6, and the bit map is 6 bits in length; if bitmap is 101010, it indicates that there are DMRS on symbols 2, 6 and 10.

A12, determining through symbol numbers carrying the DMRS in the time unit;

it should be noted that, in this case, symbol numbers are directly used to indicate which symbols carry DMRS, for example, in an offset form, [1,2,4,8] indicates that the [1,2,4,8] th symbol in the slot carries DMRS.

It should be further noted that, the symbol number may be a number based on all symbols in the time unit, for example, if there are 14 symbols in the slot, the symbol number carrying the DMRS is a number based on 14 symbols; the symbol number may also be a number based on sidelink symbols in the time unit, e.g., 6 symbols out of 14 symbols in the slot are for sidelink, and the symbol number carrying DMRS is a number based on 6 sidelink symbols.

A13, determining through the symbol number of the first DMRS in the time unit and the offset or the DMRS interval of other DMRSs relative to the first DMRS;

it should be noted that, this way indicates the number of the first symbol carrying the DMRS, and the numbers of the other symbols carrying the DMRS are given in a manner of being offset or spaced from the first symbol carrying the DMRS, for example, there are a total of 6 symbols carrying the DMRS, the number of the first symbol carrying the DMRS is 2, the offsets of the other symbols carrying the DMRS relative to the first symbol carrying the DMRS are 2, 3, 5, 7 and 9, respectively, and then the numbers of the symbols carrying the DMRS are respectively: 2. 4, 5, 7, 9 and 11.

Specifically, when the symbol number is configured based on all symbols in the time unit, the offset is an offset relative to all symbols in the time unit, and the DMRS interval is an interval relative to all symbols in the time unit; or alternatively, the process may be performed,

when the symbol number is configured based on the time unit inner side link symbol, the offset is an offset relative to the time unit inner side link symbol, and the DMRS interval is an interval relative to the time unit inner side link symbol.

When further described, before proceeding to step 101, the terminal needs to acquire the DMRS pattern available in the resource pool.

Specifically, the available DMRS patterns may be configured by the control node, for example, by the network side device through RRC signaling or by way of a system information block; the available DMRS patterns may be configured in a manner agreed by the protocol; the available DMRS patterns may also be preconfigured.

Specifically, the implementation of the available DMRS patterns may be: the standard defines a/a group of available DMRS patterns, a subset of the defined available DMRS patterns can be (pre) configured to a resource pool, further, the defined available DMRS patterns can be numbers of the DMRS patterns, and when the available DMRS patterns are configured for the resource pool, the numbers of the DMRS patterns are correspondingly configured; the implementation of the available DMRS patterns may also be: directly (pre) configuring a/a set of available DMRS patterns to a resource pool.

It is further noted that the available DMRS patterns are associated with at least one of the following parameters:

b11, subcarrier spacing (SCS);

b12, time Division Duplex (TDD) configuration;

b13, communication mode;

specifically, the communication method includes: unicast, multicast and broadcast.

B14, the number of transmission layers;

b15, whether hybrid automatic repeat request feedback (HARQ feedback) is supported.

Optionally, when the standard defines an available DMRS pattern/a group of available DMRS patterns, in a case that the DMRS pattern is related to the above parameters, for each parameter, the different value of each parameter corresponds to an available DMRS pattern set, and the resource pool corresponds to a subset or a whole set of the DMRS pattern set.

Alternatively, the DMRS pattern configured for each parameter may be numbered separately, and when the available DMRS pattern is configured for the resource pool, the DMRS pattern may be configured for numbering. Alternatively, for each parameter value, a (pre) DMRS pattern/a set of available DMRS patterns may also be directly (pre) configured to a resource pool.

It should be further noted that, the first DMRS pattern is jointly encoded with the parameters, that is, by using the bits jointly encoded in the SCI, parameters of the specific DMRS pattern and the corresponding associated DMRS pattern can be obtained simultaneously.

Further, the indication mode of the available DMRS pattern includes one of the following:

c11, numbering of the DMRS patterns;

in this case, if the available DMRS pattern is associated with a parameter, the number of the DMRS pattern is the independent number of the DMRS pattern at the value of the target parameter.

C12, configuration information of the DMRS pattern;

the configuration information of the DMRS pattern specifically refers to a distribution form of the DMRS on symbols in the time unit.

It is further noted that when the DMRS pattern is parameter independent, the SCI indicates at least one of:

d11, numbering the first DMRS pattern in all DMRS patterns;

in this case, the size of the DMRS indication field in the SCI is determined by the number of all DMRS patterns.

For example, the protocol defines several DMRS patterns and is numbered as follows:

pattern #1: each slot contains 2 DMRS, in symbol [2,8];

pattern #2: each slot contains 2 DMRS, in symbol [3,7];

pattern #3: each slot contains 3 DMRS, in symbols [2,6,9];

pattern #4: each slot contains 4 DMRS, in symbols 3,6,8, 12.

The resource pool configuration uses the pattern #3 and the pattern #4 to carry out PSSCH transmission, and the sending end selects one of the pattern #3 and the pattern #4 to carry out PSSCH transmission; when the sender selects to transmit with pattern #3, the DMRS pattern in SCI sent by the sender indicates domain indication #3; the DMRS pattern indication field of the SCI demodulated by the receiving end indicates #3, and determines [2,6,9] as the DMRS pattern of the PSSCH.

D12, the configuration number of the first DMRS pattern in the DMRS pattern configured for the resource pool;

further, the size of the DMRS indication field in the SCI is determined by at least one of:

d121, the number of all DMRS patterns;

here, the total number of DMRS patterns defined in advance is referred to.

D122, the number of DMRS patterns configured for the resource pool;

d123, maximum number of DMRS patterns that the resource pool can configure.

pattern #1: each slot contains 2 DMRS, at symbol [2,8];

pattern #2: each slot contains 2 DMRS, at symbol [3,7];

pattern #3: each slot contains 3 DMRS, at symbol [2,6,9];

pattern #4: each slot contains 4 DMRS, at symbol [3,6,9,12].

The resource pool configuration uses the pattern #3 and the pattern #4 to carry out PSSCH transmission, the transmitting end transmits the configuration of the pattern #3 and the pattern #4 through PSBCH, and the transmitting end defaults the pattern #3 and the pattern #4 to carry out renumbering, namely #1 and #2; SCI indicates #1 when the sender chooses to transmit with pattern # 3.

It is further noted that when the DMRS pattern is associated with a parameter, the SCI indicates at least one of:

D21, independently numbering the first DMRS pattern under the value of the target parameter;

specifically, the size of the DMRS indication field in the SCI is determined by at least one of:

d211, the number of all DMRS patterns;

d212, the number of the DMRS patterns under the value of the target parameter;

d213, the number of DMRS patterns with the largest value in the number of DMRS patterns corresponding to the value of each parameter;

for example, when the DMRS pattern is associated with SCS, the number of DMRS patterns corresponding to SCS value of 15kHz is 4, the number of DMRS patterns corresponding to SCS value of 30kHz is 6, and the number of DMRS patterns corresponding to SCS value of 60kHz is 8, the size of the DMRS indication field is determined by the number of DMRS patterns corresponding to SCS value of 60 kHz.

D22, the first DMRS pattern is a configuration number in the DMRS pattern configured for the resource pool under the value of the target parameter;

d221, the number of all DMRS patterns;

d222, the number of DMRS patterns under the value of the target parameter;

d223, the number of the DMRS patterns with the maximum value in the number of the DMRS patterns corresponding to the value of each parameter;

d224, the number of DMRS patterns configured for the resource pool;

D225, maximum number of DMRS patterns that the resource pool can configure.

In this way, in order to ensure that the terminal outside the cell coverage can accurately receive the data, the terminal in the cell coverage also needs to transmit the configuration information of the DMRS through the target message, so that the terminal outside the cell coverage can accurately analyze the information transmitted by the terminal in the cell coverage, and the reliability of the communication between the terminal outside the cell coverage and the terminal in the cell coverage is ensured.

Specifically, the target message is a sidelink broadcast message or a sidelink communication interface radio resource control message (e.g., PC5-RRC signaling), and further, the sidelink broadcast message may be a physical sidelink broadcast channel, a sidelink synchronization signal block, or a sidelink system information block.

When carrying configuration information in a side link broadcast message, a DMRS pattern configuration field exists in the side link broadcast message, and the DMRS pattern configuration field carries at least one of the following:

e11, numbering of DMRS patterns supported by the resource pool;

e12, a bit map, where the bit map has a corresponding relationship with the DMRS pattern;

For example, the DMRS pattern configuration field of the PSBCH carries a bitmap/group of bitmaps mapped onto the DMRS patterns defining the numbers, "1" indicating that the corresponding DMRS pattern is supported and "0" indicating that the corresponding DMRS pattern is not supported.

E13, configuration information of the DMRS patterns;

here, the DMRS is distributed over symbols in a time unit.

It should be further noted that, in the embodiment of the present invention, it is not excluded that the DMRS pattern configuration domain carries other information, for example, frequency domain configuration information of the DMRS, DMRS sequence information, DMRS scrambling code information, and the like.

It should be further noted that, if the terminal cannot obtain the available DMRS pattern configured for the resource pool, it is determined that the first DMRS pattern adopted for PSSCH transmission is a preset DMRS pattern, and further, the preset DMRS pattern is carried in the SCI sent by the sending end and may be indicated by a predetermined code point in the SCI.

It should also be noted that the preset DMRS pattern may be configured, agreed, or preconfigured by the control node.

It should be noted that, in this implementation manner, the DMRS patterns used for transmission by the transmitting end and the receiving end are configured by using RRC signaling, and then notification of the DMRS patterns is specifically used when the SCI is used for transmission, so that the complexity of detecting the terminal can be reduced; further, in this implementation manner, the configuration information of the DMRS pattern is also notified to the terminal outside the cell coverage/the partial coverage (partial coverage) terminal through the broadcast message or the RRC message of the side link, so that both the terminal inside the coverage (in-coverage) and the terminal outside the cell coverage (out of coverage) understand the information meaning of the DMRS pattern indication field of the SCI, and the side link transmission is accurately performed.

Mode two, a mode of newly defining a plurality of DMRS patterns and acquiring a specific DMRS pattern used for PSSCH transmission by SCI notification

In this case, the DMRS indication field of the SCI indicates a symbol including the DMRS in the time unit by using a bit map or a relative position.

Further, when indicated by means of a bit map, the bit map has a length satisfying at least one of the following:

the length of the bit map changes with the number of symbols in the time cell;

the length of the bit map is the fixed number of symbols supported in the time unit;

the length of the bit map is the number of side link symbols in the time unit;

the length of the bit bitmap is the maximum number of DMRS time domain symbols.

Further, when the indication is performed by adopting the relative position mode, at least one of a symbol number of a first DMRS and a first reference value of other DMRS relative to the first DMRS in the time unit is indicated;

wherein the first reference value is an offset or DMRS interval.

In this implementation manner, the DMRS used for transmission is directly indicated in the SCI and distributed on the symbol in the time unit, so that the specific form of the DMRS pattern is defined, no additional SCI signaling is needed for separate indication, the signaling overhead of the SCI is reduced, and the accuracy of the sidelink transmission can be ensured.

In addition, it should be noted that, when the DMRS pattern is configured based on the bit map or offset, the reference point indicated by the bit map or offset is a target symbol in the time unit;

wherein the target symbol comprises one of: a first symbol, a last symbol, a first sidelink symbol, and a last sidelink symbol.

For example, as shown in fig. 4, when the reference point of the Bitmap is the first symbol of the slot, then the transmitting end and the receiving end determine the DMRS position according to the same principle.

For example, as shown in fig. 5, when the reference point of the Bitmap is the first sidelink symbol of the slot, then the transmitting end and the receiving end determine the DMRS position according to the same principle.

It should be noted that, in the embodiment of the present invention, the DMRS pattern indication field information meaning of the SCI can be understood by both an in-coverage (in-coverage) terminal and an out-coverage (out of coverage) terminal; by the embodiment of the invention, the complexity of the terminal for performing DMRS pattern blind detection can be effectively reduced; the network can be allowed to flexibly carry out SL DMRS pattern configuration according to the transmission environment, and accurate transmission of information is ensured.

As shown in fig. 6, an embodiment of the present invention provides a terminal 600, including:

a transmission module 601, configured to instruct, when performing a sidelink channel transmission, a first demodulation reference signal DMRS pattern adopted by the sidelink channel transmission through control information;

Optionally, the configuration of the available DMRS patterns is obtained by at least one of:

indicated by a bit map;

determining through symbol numbers carrying the DMRS in the time unit;

and determining through the symbol number of the first DMRS in the time unit and the offset or the DMRS interval of other DMRSs relative to the first DMRS.

Further, when DMRS pattern configuration is performed by means of bit map indication, the length of the bit map satisfies at least one of the following:

The length of the bit map changes with the number of symbols in the time cell;

the length of the bit map is the number of side link symbols in the time unit;

the length of the bit bitmap is the maximum number of DMRS time domain symbols.

Further, when the DMRS pattern configuration is performed by using the symbol number carrying the DMRS in the time unit, the symbol number is based on the number of all symbols in the time unit, or the symbol number is based on the number of the symbol of the sidelink in the time unit.

Further, when the DMRS pattern configuration is performed through the symbol number of the first DMRS in the time unit and the offset or DMRS interval of other DMRS relative to the first DMRS, the symbol number is configured based on all symbols in the time unit, the offset is the offset relative to all symbols in the time unit, and the DMRS interval is the interval relative to all symbols in the time unit; or alternatively, the process may be performed,

the symbol numbers are configured based on time-unit sidelink symbols, the offset is an offset relative to the time-unit sidelink symbols, and the DMRS interval is an interval relative to the time-unit sidelink symbols.

Optionally, before the transmission module 601 indicates the first demodulation reference signal DMRS pattern adopted by the sidelink channel transmission through the control information, the method further includes:

and the acquisition module is used for acquiring the available DMRS patterns in the resource pool.

Optionally, the available DMRS patterns are configured by at least one of:

control node configuration, protocol conventions, and pre-configurations.

Optionally, the available DMRS patterns are associated with at least one of the following parameters:

a subcarrier spacing SCS;

time division duplex configuration;

a communication mode;

the number of transmission layers;

whether hybrid automatic repeat request feedback is supported.

Further, the different values of each parameter respectively correspond to an available DMRS pattern set, and the resource pool corresponds to a subset or a whole set of the DMRS pattern set.

Further, the first DMRS pattern is jointly encoded with the parameter.

Optionally, the indication manner of the available DMRS pattern includes:

numbering of DMRS patterns; or alternatively

Configuration information of DMRS patterns.

Further, when the available DMRS pattern is indicated by a number of the DMRS pattern and the available DMRS pattern is associated with a parameter, the number of the DMRS pattern is an independent number of the DMRS pattern at the value of the target parameter.

Optionally, the control information indicates at least one of:

numbering of the first DMRS pattern among all DMRS patterns;

a configuration number of the first DMRS pattern in the DMRS pattern configured for the resource pool;

the first DMRS pattern is independently numbered under the value of the target parameter;

and the first DMRS pattern is a configuration number in the DMRS pattern configured for the resource pool under the value of the target parameter.

Further, when the control information indicates the number of the first DMRS pattern in all DMRS patterns, the size of the DMRS indication field in the control information is determined by the number of all DMRS patterns.

Further, when the control information indicates the configuration number of the first DMRS pattern in the DMRS patterns configured for the resource pool, the size of the DMRS indication field in the control information is determined by at least one of:

the number of all DMRS patterns;

the number of DMRS patterns configured for the resource pool;

the maximum number of DMRS patterns that a resource pool can configure.

Further, when the first DMRS pattern is independently numbered under the value of the target parameter, the size of the DMRS indication field in the control information is determined by at least one of the following:

the number of all DMRS patterns;

The number of DMRS patterns at the value of the target parameter;

the number of DMRS patterns with the largest value among the numbers of DMRS patterns corresponding to the values of each parameter.

Further, when the first DMRS pattern is a configuration number in a DMRS pattern configured for a resource pool under the value of a target parameter, the size of a DMRS indication field in the control information is determined by at least one of the following:

the number of all DMRS patterns;

the number of DMRS patterns at the value of the target parameter;

the number of the DMRS patterns with the maximum value in the number of the DMRS patterns corresponding to the value of each parameter;

the number of DMRS patterns configured for the resource pool;

the maximum number of DMRS patterns that a resource pool can configure.

Optionally, the terminal further includes:

the configuration transmission module is used for transmitting the configuration information of the DMRS through the target message;

the target message is a side link broadcast message or a side link communication interface radio resource control message.

Further, when the target message is a side link broadcast message, a DMRS pattern configuration field exists in the side link broadcast message, and the DMRS pattern configuration field carries at least one of the following:

numbering of DMRS patterns supported by a resource pool;

A bit map, where the bit map has a correspondence with the DMRS pattern;

configuration information of DMRS patterns.

Optionally, the control information further carries at least one of the following:

frequency domain configuration information of the DMRS, DMRS sequence information, and DMRS scrambling code information.

and the determining module is used for determining that the first DMRS pattern adopted by PSSCH transmission is the preset DMRS pattern if the terminal cannot acquire the available DMRS pattern configured for the resource pool.

Further, the preset DMRS pattern is configured, agreed, or preconfigured by a control node.

Further, when the terminal is a transmitting end, the preset DMRS pattern is indicated by a predetermined code point in the control information.

Optionally, the DMRS indication field of the control information indicates a symbol including the DMRS in the time unit by using a bit bitmap or a relative position.

the length of the bit map changes with the number of symbols in the time cell;

the length of the bit map is the number of side link symbols in the time unit;

the length of the bit bitmap is the maximum number of DMRS time domain symbols.

wherein the first reference value is an offset or DMRS interval.

Further, when the DMRS pattern is configured based on the bit map or the offset, the reference point indicated by the bit map or the offset is a target symbol in the time unit;

Further, the sidelink channel includes at least: the physical sidelink shared channel PSSCH.

It should be noted that, the terminal embodiment is a terminal corresponding to the above-mentioned method for indicating the configuration of the demodulation reference signal applied to the terminal, and all the implementation manners of the above-mentioned embodiment are applicable to the terminal embodiment, and the same technical effects as those of the terminal embodiment can be achieved.

Fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present invention.

The terminal 70 includes, but is not limited to: radio frequency unit 710, network module 720, audio output unit 730, input unit 740, sensor 750, display unit 760, user input unit 770, interface unit 780, memory 790, processor 711, and power supply 712. It will be appreciated by those skilled in the art that the terminal structure shown in fig. 7 is not limiting of the terminal and that the terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the terminal comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like.

Wherein the processor 711 is configured to instruct, when performing the sidelink channel transmission, a first demodulation reference signal DMRS pattern used for the sidelink channel transmission through the control information;

The terminal of the embodiment of the invention can reduce the detection complexity of the terminal and ensure the accurate transmission of the information by indicating the DMRS pattern adopted by the transmission of the side link channel in the control information.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 710 may be configured to receive and send information or signals during a call, specifically, receive downlink data from a network side device, and then process the received downlink data with the processor 711; in addition, the uplink data is sent to the network side equipment. Typically, the radio frequency unit 710 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 710 may also communicate with networks and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 720, such as helping the user to send and receive e-mail, browse web pages, access streaming media, etc.

The audio output unit 730 may convert audio data received by the radio frequency unit 710 or the network module 720 or stored in the memory 790 into an audio signal and output as sound. Also, the audio output unit 730 may also provide audio output (e.g., a call signal receiving sound, a message receiving sound, etc.) related to a specific function performed by the terminal 70. The audio output unit 730 includes a speaker, a buzzer, a receiver, and the like.

The input unit 740 is used to receive an audio or video signal. The input unit 740 may include a graphics processor (Graphics Processing Unit, GPU) 741 and a microphone 742, the graphics processor 741 processing image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 760. The image frames processed by the graphics processor 741 may be stored in the memory 790 (or other storage medium) or transmitted via the radio frequency unit 710 or the network module 720. The microphone 742 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to a mobile communication network side device via the radio frequency unit 710 in the case of a telephone call mode.

The terminal 70 also includes at least one sensor 750, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 761 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 761 and/or the backlight when the terminal 70 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when the accelerometer sensor is stationary, and can be used for recognizing the terminal gesture (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 750 may further include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.

The display unit 760 serves to display information input by a user or information provided to the user. The display unit 760 may include a display panel 761, and the display panel 761 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 770 may be used to receive input numerical or character information and generate key signal inputs related to user settings of the terminal and function control. In particular, the user input unit 770 includes a touch panel 771 and other input devices 772. Touch panel 771, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on touch panel 771 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 771 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 711, and receives and executes commands sent from the processor 711. In addition, the touch panel 771 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 771, the user input unit 770 may also include other input devices 772. In particular, other input devices 772 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 771 may be overlaid on the display panel 761, and when the touch panel 771 detects a touch operation thereon or thereabout, the touch panel is transferred to the processor 711 to determine a type of touch event, and then the processor 711 provides a corresponding visual output on the display panel 761 according to the type of touch event. Although in fig. 7, the touch panel 771 and the display panel 761 are implemented as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 771 and the display panel 761 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 780 is an interface to which an external device is connected to the terminal 70. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 780 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 70 or may be used to transmit data between the terminal 70 and an external device.

Memory 790 may be used to store software programs as well as various data. The memory 790 may mainly include a storage program area that may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 790 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 711 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 790 and calling data stored in the memory 790, thereby performing overall monitoring of the terminal. The processor 711 may include one or more processing units; preferably, the processor 711 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 711.

The terminal 70 may also include a power supply 712 (e.g., a battery) for powering the various components, and the power supply 712 may preferably be logically connected to the processor 711 by a power management system, such as to perform charge, discharge, and power consumption management functions via the power management system.

In addition, the terminal 70 includes some functional modules, which are not shown, and will not be described herein.

Preferably, the embodiment of the present invention further provides a terminal, which includes a processor 711, a memory 790, and a computer program stored in the memory 790 and capable of running on the processor 711, where the computer program when executed by the processor 711 implements each procedure of the embodiment of the demodulation reference signal configuration indication method applied to the terminal side, and can achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the demodulation reference signal configuration indication method embodiment applied to the terminal side, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and such modifications and changes are intended to be within the scope of the present invention.

Claims

1. A demodulation reference signal configuration indication method, applied to a terminal, characterized by comprising the following steps:

transmitting configuration information of the DMRS through a target message, wherein the target message is a side link broadcast message or a side link communication interface radio resource control message;

2. The demodulation reference signal configuration indication method of claim 1, wherein the configuration of the available DMRS pattern is obtained by at least one of:

indicated by a bit map;

determining through symbol numbers carrying the DMRS in the time unit;

3. The demodulation reference signal configuration indication method according to claim 2, wherein when DMRS pattern configuration is performed by means of bit map indication, the length of the bit map satisfies at least one of the following:

the length of the bit map changes with the number of symbols in the time cell;

the length of the bit map is the number of side link symbols in the time unit;

the length of the bit bitmap is the maximum number of DMRS time domain symbols.

4. The method of instructing configuration of demodulation reference signals according to claim 2, wherein when the DMRS pattern configuration is performed by using symbol numbers carrying DMRS in a time unit, the symbol numbers are numbers based on all symbols in the time unit, or the symbol numbers are numbers based on sidelink symbols in the time unit.

5. The demodulation reference signal configuration indication method of claim 2 wherein, when the DMRS pattern configuration is performed by a symbol number of a first DMRS in a time unit and an offset or a DMRS interval of other DMRS with respect to the first DMRS, the symbol number is configured based on all symbols in the time unit, the offset is an offset with respect to all symbols in the time unit, and the DMRS interval is an interval with respect to all symbols in the time unit; or alternatively, the process may be performed,

6. The demodulation reference signal configuration indication method according to claim 1, further comprising, before indicating the first demodulation reference signal DMRS pattern employed for the side link channel transmission by the control information:

and acquiring the available DMRS patterns in the resource pool.

7. The demodulation reference signal configuration indication method of claim 6, wherein the available DMRS pattern is configured by at least one of:

control node configuration, protocol conventions, and pre-configurations.

8. The demodulation reference signal configuration indication method of claim 1, wherein the available DMRS pattern is associated with at least one of the following parameters:

a subcarrier spacing SCS;

time division duplex configuration;

a communication mode;

the number of transmission layers;

whether hybrid automatic repeat request feedback is supported.

9. The method of claim 8, wherein the different values of each parameter correspond to an available DMRS pattern set, and the resource pool corresponds to a subset or a complete set of the DMRS pattern set.

10. The demodulation reference signal configuration indication method of claim 8 wherein the first DMRS pattern is jointly encoded with the parameter.

11. The method for indicating the configuration of the demodulation reference signal according to claim 6 or 8, wherein the indication manner of the available DMRS pattern includes:

numbering of DMRS patterns; or alternatively

Configuration information of DMRS patterns.

12. The demodulation reference signal configuration indication method of claim 11, wherein when the available DMRS pattern is indicated by a number of a DMRS pattern and the available DMRS pattern is associated with a parameter, the number of the DMRS pattern is an independent number of the DMRS pattern at a value of a target parameter.

13. The demodulation reference signal configuration indication method according to claim 1 or 8, wherein the control information indicates at least one of:

numbering of the first DMRS pattern among all DMRS patterns;

14. The demodulation reference signal configuration indication method of claim 13, wherein when the control information indicates the number of the first DMRS pattern among all DMRS patterns, the size of the DMRS indication field in the control information is determined by the number of all DMRS patterns.

15. The demodulation reference signal configuration indication method of claim 13, wherein when the control information indicates a configuration number of the first DMRS pattern in a DMRS pattern configured for a resource pool, a size of a DMRS indication field in the control information is determined by at least one of:

the number of all DMRS patterns;

the number of DMRS patterns configured for the resource pool;

the maximum number of DMRS patterns that a resource pool can configure.

16. The demodulation reference signal configuration indication method of claim 13 wherein, when the first DMRS pattern is independently numbered at the value of the target parameter, the size of the DMRS indication field in the control information is determined by at least one of:

the number of all DMRS patterns;

the number of DMRS patterns at the value of the target parameter;

17. The demodulation reference signal configuration indication method of claim 13, wherein when the first DMRS pattern is a configuration number in a DMRS pattern configured for a resource pool at a value of a target parameter, a size of a DMRS indication field in the control information is determined by at least one of:

the number of all DMRS patterns;

the number of DMRS patterns at the value of the target parameter;

the number of DMRS patterns configured for the resource pool;

the maximum number of DMRS patterns that a resource pool can configure.

18. The demodulation reference signal configuration indication method of claim 1 wherein when the target message is a side link broadcast message, a DMRS pattern configuration field is present in the side link broadcast message, the DMRS pattern configuration field carrying at least one of:

numbering of DMRS patterns supported by a resource pool;

a bit map, where the bit map has a correspondence with the DMRS pattern;

configuration information of DMRS patterns.

19. The method according to any one of claims 1-18, wherein the control information further carries at least one of:

20. The demodulation reference signal configuration indication method according to claim 1, further comprising, before indicating the first demodulation reference signal DMRS pattern employed for the side link channel transmission by the control information:

if the terminal cannot acquire the available DMRS patterns configured for the resource pool, determining that a first DMRS pattern adopted by PSSCH transmission is a preset DMRS pattern.

21. The demodulation reference signal configuration indication method of claim 20 wherein the preset DMRS pattern is configured, agreed, or preconfigured by a control node.

22. The demodulation reference signal configuration indication method of claim 20 wherein the preset DMRS pattern is indicated by a predetermined code point in the control information when the terminal is a transmitting end.

23. The method of claim 1 wherein the DMRS indication field of the control information indicates symbols including DMRS in a time unit by using a bit map or a relative position.

24. The demodulation reference signal configuration indication method according to claim 23, characterized in that when indicated by means of a bit map, the length of the bit map satisfies at least one of the following:

The length of the bit map changes with the number of symbols in the time cell;

the length of the bit map is the number of side link symbols in the time unit;

the length of the bit bitmap is the maximum number of DMRS time domain symbols.

25. The method of indicating configuration of demodulation reference signals according to claim 23, wherein when the indication is performed by means of a relative position, at least one of a symbol number of a first DMRS in a time unit and a first reference value of other DMRS with respect to the first DMRS is indicated;

wherein the first reference value is an offset or DMRS interval.

26. The demodulation reference signal configuration indication method according to claim 1, wherein when the DMRS pattern is configured based on a bit map or offset, a reference point indicated by the bit map or offset is a target symbol in a time unit;

27. The demodulation reference signal configuration indication method according to claim 1, wherein the side link channel comprises at least: the physical sidelink shared channel PSSCH.

28. A terminal, comprising:

the configuration transmission module is used for transmitting the configuration information of the DMRS through a target message, wherein the target message is a side link broadcast message or a side link communication interface radio resource control message;

29. A terminal, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the demodulation reference signal configuration indication method according to any one of claims 1 to 27.

30. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the demodulation reference signal configuration indication method according to any one of claims 1 to 27.