CN112019311A

CN112019311A - Communication method and device

Info

Publication number: CN112019311A
Application number: CN201910468457.8A
Authority: CN
Inventors: 刘曦; 莫勇; 张福强; 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-12-01
Anticipated expiration: 2039-05-31
Also published as: CN112019311B; WO2020239062A1

Abstract

The embodiment of the application provides a communication method and device, which can be applied to the internet of vehicles, such as V2X, LTE-V, V2V and the like, and comprises the following steps: acquiring first frequency domain mapping pattern information including first reference signal mapping pattern information indicating a pattern of mapping a reference signal in frequency domain resources of one OFDM symbol and first data mapping pattern information indicating a pattern of mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; mapping reference signals and/or data on first time-frequency resources according to the first frequency-domain mapping pattern information; reference signals and/or data are transmitted on a first time-frequency resource. The embodiment of the application ensures the utilization rate of the time-frequency resources for data transmission.

Description

Communication method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method and device.

Background

The vehicle-to-all (V2X) technology is an automotive wireless communication technology formed based on cellular communication technology evolution, and an application scenario thereof has the characteristics of large signal dynamic range, large communication delay, high channel change speed and the like.

In order to achieve higher reliability and lower communication delay, the types of time-frequency resources used for data transmission in a New Radio (NR) -V2X communication system are richer than those in Long Term Evolution (LTE) -V2X, for example, the LTE-V2X communication system includes time-frequency resources with sub-carrier spacing (SCS) of 15kHz, 30kHz, 60kHz, and the like. Therefore, how to ensure the utilization rate of various time-frequency resources corresponding to the NR-V2X when the resources are used for parameter signal and/or data transmission is an urgent problem to be solved.

Disclosure of Invention

The application provides a communication method and a communication device, which ensure the utilization rate of time-frequency resources for data transmission.

The application provides a communication method, which is applied to a first terminal device and comprises the following steps: acquiring first frequency domain mapping pattern information, wherein the first frequency domain mapping pattern information comprises first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used for indicating a pattern of mapping a reference signal in frequency domain resources of one Orthogonal Frequency Division Multiplexing (OFDM) symbol, and the first data mapping pattern information is used for indicating a pattern of mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; mapping reference signals and/or data in frequency domain resources of at least one OFDM symbol in first time-frequency resources according to the first frequency domain mapping pattern information; and transmitting the reference signal and/or the data to a second terminal device on the first time-frequency resource. Optionally, the reference signal is an automatic gain control, AGC, reference signal, or the reference signal is a demodulation reference signal, DMRS.

In this scheme, since the frequency domain mapping pattern information includes reference signal pattern information and data mapping pattern information, and there are at least two types of reference signal pattern information and at least two types of data mapping pattern information, one OFDM symbol corresponds to multiple types of frequency domain mapping pattern information. Therefore, the first terminal device can flexibly select one frequency domain mapping pattern information matched with the current data transmission characteristic from the multiple frequency domain mapping pattern information according to the current data transmission characteristic such as SCS (instant domain resource type) corresponding to the current data transmission; the frequency domain mapping pattern information matched with the current data transmission characteristics refers to: when the reference signal and/or the data are mapped in the frequency domain resource of one OFDM symbol according to the frequency domain mapping pattern information, the utilization rate of the time frequency resource for current data transmission can be ensured on the basis of ensuring the current data transmission performance. Therefore, the method of the embodiment can ensure the utilization rate of the time-frequency resources for the current data transmission.

The manner in which the first terminal device obtains the first frequency domain mapping pattern information includes, but is not limited to, the following two implementation manners:

the first embodiment: the obtained first frequency domain mapping pattern information includes: receiving the first frequency-domain mapping pattern information from a network device.

The embodiment is suitable for the scene that the first terminal equipment is in the coverage range of the cellular communication network, and the power consumption of the first terminal equipment is low.

The second embodiment: the obtaining of the first frequency domain mapping pattern information includes: determining the first reference signal mapping pattern information from the at least two reference signal mapping pattern information, the at least two reference signal mapping pattern information being either predefined or configured for higher layer signaling; determining first data mapping pattern information from the at least two data mapping pattern information, the at least two data mapping pattern information being either predefined or configured for higher layer signaling.

The embodiment is suitable for a scene that the first terminal equipment is not in the coverage range of the cellular communication network.

With reference to the first aspect, in a possible implementation manner of the first aspect, the method further includes: and sending the first frequency domain mapping pattern information to the second terminal equipment.

According to the scheme, the second terminal equipment can acquire the frequency domain mapping pattern information of the mapping reference signal and the data of the first terminal equipment, so that the second terminal equipment can correctly receive the reference signal and/or the data sent by the first terminal equipment.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N REs of the mapping group include M REs for mapping reference signals, M is not greater than N, N is a positive integer, and M is an integer; the first reference signal mapping pattern information includes information indicating consecutive N REs as one mapping group; or, the first reference signal mapping pattern information includes information indicating that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are M REs for mapping the reference signal among the consecutive N REs.

The present solution provides several forms of first reference signal mapping pattern information.

With reference to the first aspect, in a possible implementation manner of the first aspect, N is any one of the following: 1. 2, 3, 4, 6, 12; the M is any one of the following: 0. 1, 2, 3, 4 and 6.

The value of N in this scheme makes it easier for the first terminal device to map the reference signal and/or data on the first time-frequency resource.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first pre-selected frequency-domain offset; wherein the first RE or the last RE in the mapping group is a reference RE, the RE with the least RE spaced from the reference RE among the M REs for mapping the reference signal in the mapping group is an initial RE, the first pre-selected frequency domain offset is a frequency domain offset between the initial RE and the reference RE, M is a positive integer, and M is less than or equal to N.

In this scheme, the first frequency domain mapping pattern information includes a first preselected frequency domain offset, which can reduce signaling overhead.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first pre-selected frequency-domain offset, the first pre-selected frequency-domain offset is a frequency-domain offset between starting REs and reference REs, a first RE or a last RE in the mapping group is the reference RE, a RE with the least REs among M REs used for mapping a reference signal and the reference RE in the mapping group is the starting RE, M is a positive integer, and M is not more than N; the method further comprises the following steps: acquiring the first preselected frequency domain bias; the mapping, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources includes: mapping reference signals and/or data in frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the first pre-selected frequency domain offset.

In this scheme, the first frequency domain mapping pattern information does not include the first preselected frequency domain offset, and the memory occupation on the first terminal device and the second terminal device is small.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters; the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping a reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter in the first frequency-domain offset parameter set corresponding to the first RE, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset between the reference REs of the first RE, M is a positive integer, and M is less than or equal to N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs.

In this scheme, the first frequency domain mapping pattern information includes the first frequency domain offset parameter set, which may reduce signaling overhead.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first frequency-domain offset parameter set, a sum of a first parameter and a first pre-selected frequency-domain offset included in the first frequency-domain offset parameter set is a first frequency-domain offset of a first RE of M REs for mapping a reference signal in the mapping group, the first RE is any one of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset of the first RE with respect to the reference RE, M is an integer, and M is not greater than N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs; the method further comprises the following steps: acquiring the first frequency domain offset parameter set; the mapping, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources includes: mapping reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set.

In this scheme, the first frequency domain mapping pattern information does not include the first frequency domain offset parameter set, and the memory occupation on the first terminal device and the second terminal device is small.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises first frequency-domain offsets of respective M REs used by the mapping set for mapping the reference signal; wherein, the first RE or the last RE in the mapping group is a reference RE, and for a first RE of the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE, where M is a positive integer and M is less than or equal to N.

In this scheme, the first frequency domain mapping pattern information includes respective first frequency domain offsets of the M REs, which may reduce signaling overhead. Meanwhile, the scheme can also reduce the power consumption of the second terminal equipment for acquiring the RE for mapping the reference signal.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include respective first frequency-domain offsets of M REs used for mapping a reference signal in the mapping group, a first RE or a last RE in the mapping group is a reference RE, for any first RE of the M REs, the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE, the M is a positive integer, and M is not greater than N; the method further comprises the following steps: acquiring respective first frequency domain offsets of M REs used for mapping the reference signal in the mapping group; the mapping, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources includes: and mapping the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the first frequency domain offset of each of the M REs used for mapping the reference signals in the mapping group.

In this scheme, the first frequency domain mapping pattern information does not include the respective first frequency domain offsets of the M REs used for mapping the reference signal in the mapping group, and the memory usage for the first terminal device and the second terminal device is small. Meanwhile, the scheme can also reduce the power consumption of the second terminal equipment for acquiring the RE for mapping the reference signal.

With reference to the first aspect, in a possible implementation manner of the first aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N is a positive integer; the first data mapping pattern information includes: a first density of REs in the mapping set used to map the data; wherein the first density is a ratio of the number H of REs used for mapping data in the mapping group to the N, the H is an integer, and H is less than or equal to N; or, first indication information, where the first indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, REs other than REs to which the reference signal is mapped are REs used for mapping the data; or, second indication information, where the second indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, there is no RE for mapping the data.

Optionally, the first density is one of: 0. 1/2, 2/3, 1/3, 3/4, 2/4, 1/4, 5/6, 4/6, 3/6, 2/6, 1/6, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12.

The present solution provides several forms of the first data mapping style information.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first frequency-domain mapping pattern information includes second frequency-domain offsets of H REs in the mapping group, where H is an integer and H is less than or equal to N, respectively, for mapping the data; wherein the first RE or the last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency domain offset of the second RE is a frequency domain offset between the second RE and the reference RE.

In this scheme, the first frequency domain mapping pattern information includes second frequency domain offsets of H REs used for mapping data in the mapping group, which may reduce signaling overhead.

With reference to the first aspect, in a possible implementation manner of the first aspect, the first frequency-domain mapping pattern information does not include second frequency-domain offsets of H REs used for mapping the data in the mapping group, where a first RE or a last RE in the mapping group is a reference RE, and for any second RE in the H REs, the second frequency-domain offset of the second RE is a frequency-domain offset between the second RE and the reference RE, where H is an integer, and H is not greater than N; the method further comprises the following steps: acquiring second frequency domain offsets of the H REs used for mapping the data in the mapping group; the mapping, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources includes: mapping reference signals and/or data in frequency-domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information and second frequency-domain offsets of the H REs in the mapping group, which are used for mapping the data.

In this scheme, the first frequency domain mapping pattern information does not include second frequency domain offsets of the H REs used for mapping data in the mapping group, and the memory usage for the first terminal device and the second terminal device is small.

In a second aspect, an embodiment of the present application provides a communication method, applied to a second terminal device, including: receiving first frequency domain mapping pattern information from a first terminal device or a network device, the first frequency domain mapping pattern comprising first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information being used for indicating a pattern for mapping reference signals in frequency domain resources of one orthogonal frequency division multiplexing, OFDM, symbol, and the first data mapping pattern information being used for indicating a pattern for mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for the first terminal equipment to map reference signals and/or data in frequency domain resources of at least one OFDM symbol in first time-frequency resources; and acquiring the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain pattern information.

In this scheme, the second terminal device receives the first frequency domain mapping pattern information from the first terminal device or the network device, so that the second terminal device can correctly receive the reference signal and/or data sent by the first terminal device.

With reference to the second aspect, in a possible implementation manner of the second aspect, the reference signal is an automatic gain control, AGC, reference signal, or the reference signal is a demodulation reference signal, DMRS.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are a mapping group, where N REs of the mapping group include M REs for mapping reference signals, M is not greater than N, N is a positive integer, and M is an integer; the first reference signal mapping pattern information includes information indicating consecutive N REs as one mapping group; or, the first reference signal mapping pattern information includes information indicating that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are M REs for mapping the reference signal among the consecutive N REs.

With reference to the second aspect, in a possible implementation manner of the second aspect, N is any one of the following: 1. 2, 3, 4, 6, 12; the M is any one of the following: 0. 1, 2, 3, 4 and 6.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first pre-selected frequency-domain offset; wherein the first RE or the last RE in the mapping group is a reference RE, the RE with the least RE spaced from the reference RE among the M REs for mapping the reference signal in the mapping group is an initial RE, the first pre-selected frequency domain offset is a frequency domain offset between the initial RE and the reference RE, M is a positive integer, and M is less than or equal to N.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first pre-selected frequency-domain offset, the first pre-selected frequency-domain offset is a frequency-domain offset between starting REs and reference REs, a first RE or a last RE in the mapping group is the reference RE, a RE with the least REs among M REs used for mapping a reference signal and the reference RE in the mapping group is the starting RE, M is a positive integer, and M is not more than N; the method further comprises the following steps: acquiring the first preselected frequency domain bias; the method further comprises the following steps: acquiring the first preselected frequency domain bias; the obtaining the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information includes: and acquiring the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first pre-selected frequency-domain offset.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters; the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping a reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter in the first frequency-domain offset parameter set corresponding to the first RE, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset between the reference REs of the first RE, M is a positive integer, and M is less than or equal to N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first frequency-domain offset parameter set, a sum of a first parameter and a first pre-selected frequency-domain offset included in the first frequency-domain offset parameter set is a first frequency-domain offset of a first RE of M REs for mapping a reference signal in the mapping group, the first RE is any one of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset of the first RE with respect to the reference RE, M is an integer, and M is not greater than N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs; the method further comprises the following steps: acquiring the first frequency domain offset parameter set; the method further comprises the following steps: acquiring the first frequency domain offset parameter set; the obtaining the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information includes: and acquiring the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises first frequency-domain offsets of respective M REs used by the mapping set for mapping the reference signal; wherein, the first RE or the last RE in the mapping group is a reference RE, and for a first RE of the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE, where M is a positive integer and M is less than or equal to N.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include respective first frequency-domain offsets of M REs used for mapping a reference signal in the mapping group, a first RE or a last RE in the mapping group is a reference RE, for any first RE of the M REs, the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE, the M is a positive integer, and M is not greater than N; the method further comprises the following steps: acquiring respective first frequency domain offsets of M REs used for mapping the reference signal in the mapping group; the method further comprises the following steps: obtaining respective first frequency domain offsets of M REs used for mapping a reference signal in the mapping group; the obtaining the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information includes: and acquiring the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first frequency-domain offset of each of the M REs for mapping the reference signal in the mapping group.

With reference to the second aspect, in a possible implementation manner of the second aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first data mapping pattern information includes: a first density of REs in the mapping set used to map the data; wherein the first density is a ratio of the number H of REs used for mapping data in the mapping group to the N, the H is an integer, and H is less than or equal to N; or, first indication information, where the first indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, REs other than REs to which the reference signal is mapped are REs used for mapping the data; or, second indication information, where the second indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, there is no RE for mapping the data.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first density is one of the following values: 0. 1/2, 2/3, 1/3, 3/4, 2/4, 1/4, 5/6, 4/6, 3/6, 2/6, 1/6, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first frequency-domain mapping pattern information includes second frequency-domain offsets of H REs in the mapping group, where H is an integer and H is less than or equal to N, respectively, for mapping the data; wherein the first RE or the last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency domain offset of the second RE is a frequency domain offset between the second RE and the reference RE.

With reference to the second aspect, in a possible implementation manner of the second aspect, the first frequency-domain mapping pattern information does not include a second frequency-domain offset of each of H REs used for mapping the data in the mapping group, where a first RE or a last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency-domain offset of the second RE is a frequency-domain offset between the second RE and the reference RE, where H is an integer, and H is not greater than N; the method further comprises the following steps: acquiring second frequency domain offsets of the H REs used for mapping the data in the mapping group; the obtaining the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information includes: and acquiring the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and second frequency-domain offsets of the H REs in the mapping group, which are used for mapping the data.

In a third aspect, an embodiment of the present application provides a communication method, applied to a network device, including: acquiring first frequency domain mapping pattern information, wherein the first frequency domain mapping pattern information comprises first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used for indicating a pattern of mapping a reference signal in frequency domain resources of one Orthogonal Frequency Division Multiplexing (OFDM) symbol, and the first data mapping pattern information is used for indicating a pattern of mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for a first terminal device to map a reference signal and/or data in a frequency domain resource of at least one OFDM symbol in a first time-frequency resource, wherein the first time-frequency resource is used for the first terminal device to send the reference signal and/or the data to a second terminal device; and sending the first frequency domain mapping pattern information to the first terminal equipment and/or the second terminal equipment.

In this scheme, since the frequency domain mapping pattern information includes reference signal pattern information and data mapping pattern information, and there are at least two types of reference signal pattern information and at least two types of data mapping pattern information, one OFDM symbol corresponds to multiple types of frequency domain mapping pattern information. Therefore, the network equipment can flexibly select one frequency domain mapping pattern information matched with the current data transmission characteristic from the multiple frequency domain mapping pattern information according to the current data transmission characteristic such as SCS (instant domain resource type) and the like corresponding to the current data transmission; the frequency domain mapping pattern information matched with the current data transmission characteristics refers to: when the reference signal and/or the data are mapped in the frequency domain resource of one OFDM symbol according to the frequency domain mapping pattern information, the utilization rate of the time frequency resource for current data transmission can be ensured on the basis of ensuring the current data transmission performance. Therefore, the method of the embodiment can ensure the utilization rate of the time-frequency resources for the current data transmission.

With reference to the third aspect, in a possible implementation manner of the third aspect, the obtaining the first frequency domain mapping pattern information includes: determining the first reference signal mapping pattern information from the at least two reference signal mapping pattern information, the at least two reference signal mapping pattern information being predefined; determining first data mapping pattern information from the at least two data mapping pattern information, the at least two data mapping pattern information being predefined.

With reference to the third aspect, in a possible implementation manner of the third aspect, the reference signal is an automatic gain control, AGC, reference signal, or the reference signal is a demodulation reference signal, DMRS.

With reference to the third aspect, in a possible implementation manner of the third aspect, every N consecutive resource elements REs in frequency domain resources of one OFDM symbol are a mapping group, where N REs of the mapping group include M REs for mapping reference signals, M is not greater than N, N is a positive integer, and M is an integer; the first reference signal mapping pattern information includes information indicating consecutive N REs as one mapping group; or, the first reference signal mapping pattern information includes information indicating that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are M REs for mapping the reference signal among the consecutive N REs.

With reference to the third aspect, in a possible implementation manner of the third aspect, N is any one of: 1. 2, 3, 4, 6, 12; the M is any one of the following: 0. 1, 2, 3, 4 and 6.

With reference to the third aspect, in a possible implementation manner of the third aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first pre-selected frequency-domain offset; wherein the first RE or the last RE in the mapping group is a reference RE, the RE with the least RE spaced from the reference RE among the M REs for mapping the reference signal in the mapping group is an initial RE, the first pre-selected frequency domain offset is a frequency domain offset between the initial RE and the reference RE, M is a positive integer, and M is less than or equal to N.

With reference to the third aspect, in a possible implementation manner of the third aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters; the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping a reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter in the first frequency-domain offset parameter set corresponding to the first RE, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset between the reference REs of the first RE, M is a positive integer, and M is less than or equal to N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs.

With reference to the third aspect, in a possible implementation manner of the third aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises first frequency-domain offsets of respective M REs used by the mapping set for mapping the reference signal; wherein, the first RE or the last RE in the mapping group is a reference RE, and for a first RE of the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE, where M is a positive integer and M is less than or equal to N.

With reference to the third aspect, in a possible implementation manner of the third aspect, every N consecutive resource elements REs in a frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first data mapping pattern information includes: a first density of REs in the mapping set used to map the data; wherein the first density is a ratio of the number H of REs used for mapping data in the mapping group to the N, the H is an integer, and H is less than or equal to N; or, first indication information, where the first indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, REs other than REs to which the reference signal is mapped are REs used for mapping the data; or, second indication information, where the second indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, there is no RE for mapping the data.

With reference to the third aspect, in a possible implementation manner of the third aspect, the first density is one of: 0. 1/2, 2/3, 1/3, 3/4, 2/4, 1/4, 5/6, 4/6, 3/6, 2/6, 1/6, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12.

With reference to the third aspect, in a possible implementation manner of the third aspect, the first frequency-domain mapping pattern information includes second frequency-domain offsets of H REs in the mapping group, where H is an integer and H is less than or equal to N, respectively, for mapping the data; wherein the first RE or the last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency domain offset of the second RE is a frequency domain offset between the second RE and the reference RE.

A fourth aspect provides a communication apparatus, which may be a terminal device or a chip in the terminal device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a terminal device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the terminal device may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored in the storage unit, so that the terminal device performs the corresponding functions in the first aspect. When the apparatus is a chip in a terminal device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes instructions stored in a storage unit (e.g., a register, a cache, etc.) within the chip, or a storage unit (e.g., a read-only memory, a random access memory, etc.) external to the chip within the terminal device, so as to enable the terminal device to perform the corresponding functions in the first aspect.

A fifth aspect provides a communication apparatus, which may be a network device or a chip within the network device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a network device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the network device may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored in the storage unit, so as to enable the network device to perform the corresponding functions in the first aspect. When the apparatus is a chip within a network device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes instructions stored in a storage unit (e.g., a register, a cache, etc.) within the chip, or a storage unit (e.g., a read-only memory, a random access memory, etc.) external to the chip within the network device, so as to enable the network device to perform the corresponding functions in the first aspect.

A sixth aspect provides a communication apparatus comprising a processor and a storage medium, the storage medium storing instructions that, when executed by the processor, cause the processor to perform the method of any one of the possible implementations of the first aspect and the first aspect or cause the processor to perform the method of any one of the possible implementations of the second aspect and the second aspect or cause the processor to perform the method of any one of the possible implementations of the third aspect and the third aspect.

A seventh aspect provides a readable storage medium having a computer program stored thereon; the computer program is configured to, when executed, implement the method of the first aspect and any of the possible implementations of the first aspect or the second aspect or cause the processor to perform the method of the third aspect and any of the possible implementations of the third aspect.

A seventh aspect provides a computer program product, the computer program product comprising: computer program code which, when run on a communication device, causes the communication device to perform the method of any one of the possible implementations of the first aspect and the first aspect or causes the communication device to perform the method of any one of the possible implementations of the second aspect and the second aspect or causes the processor to perform the method of any one of the possible implementations of the third aspect and the third aspect.

In this application, since the frequency domain mapping pattern information includes reference signal pattern information and data mapping pattern information, and there are at least two types of reference signal pattern information and at least two types of data mapping pattern information, one OFDM symbol corresponds to a plurality of types of frequency domain mapping pattern information. Therefore, the terminal equipment or the network equipment which needs to send data can flexibly select one frequency domain mapping pattern information matched with the current data transmission characteristic from the multiple frequency domain mapping pattern information according to the current data transmission characteristics such as SCS (instant domain resource type) and the like corresponding to the current data transmission; the frequency domain mapping pattern information matched with the current data transmission characteristics refers to: when the reference signal and/or the data are mapped in the frequency domain resource of one OFDM symbol according to the frequency domain mapping pattern information, the utilization rate of the time frequency resource for current data transmission can be ensured on the basis of ensuring the current data transmission performance. Therefore, the utilization rate of the time-frequency resources for current data transmission can be guaranteed.

Drawings

Fig. 1 is a schematic time domain format diagram of mapping DMRS in one subframe in an LTE-V2X communication system;

fig. 2 is a schematic diagram of a communication system provided in an embodiment of the present application;

fig. 3 is a first signaling interaction diagram provided in an embodiment of the present application;

FIG. 4 is a diagram illustrating a mapping group provided by an embodiment of the present application;

fig. 5 is a first schematic diagram of a frequency domain mapping pattern provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a frequency domain mapping pattern provided in an embodiment of the present application;

fig. 7 is a third schematic diagram of a frequency domain mapping pattern provided in an embodiment of the present application;

fig. 8 is a fourth schematic diagram of a frequency domain mapping pattern provided in the embodiment of the present application;

fig. 9 is a first flowchart of a communication method according to an embodiment of the present application;

fig. 10 is a second flowchart of a communication method according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to another embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to another embodiment of the present application;

fig. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

For a better understanding of the present application, the prior art in a V2X communication system will first be described.

In an LTE-V2X communication system, the SCS is a fixed 15 kHz. In order to achieve higher reliability and lower communication latency, the NR-V2X communication system needs to support multiple SCS: 15kHz, 30kHz, 60kHz, etc.

And AGC symbols: V2X is a wireless communication system, and in order to enable the terminal device to adapt to a larger dynamic range of power, the terminal device needs to adopt an Automatic Gain Control (AGC) control technique to adjust the strength of the received signal to a range suitable for subsequent processing. The OFDM symbol for AGC in one slot or subframe is generally the first symbol of the subframe or the slot, and the OFDM symbol for AGC is referred to as an AGC symbol in the embodiment of the present application.

Under different SCS, the length of OFDM symbol is different. For example, in the LTE-V2X communication system, when the SCS is 15KHz and the Cyclic Prefix (CP) type is normal CP (normal CP), the length of the slot is 1000 microseconds (us), and the effective length of the OFDM symbol is 66.67 us. When the SCS is 60KHz and the CP type is normal CP (normal CP), the length of the slot is 250 microseconds (us) and the effective length of the OFDM symbol is 16.67 us.

If the time length required by the terminal equipment to perform AGC is 15us, and the SCS is 15KHz, the effective length of the AGC symbol is 66.67us, and therefore, the time length required by AGC is much smaller than the length of the AGC symbol. Since the terminal device may cause a sudden change in the phase of the data signal during AGC, if a sending end sends a segment of data signal on an AGC symbol at this time, the segment of data signal cannot be used for demodulation and decoding due to the influence of AGC, and therefore, most of the time in an AGC symbol period (a period lasting for one AGC symbol length) is wasted, that is, the utilization rate of the AGC symbol is low.

If the time length required by the terminal equipment for carrying out AGC is 15us, and the SCS is 60KHz, the effective length of the AGC symbol is 16.67us, and at the moment, the utilization rate of the AGC symbol is high.

That is to say, the mapping manner of the signal on the AGC symbol needs to be adjusted according to the current data transmission characteristics such as the time domain resource type (for example, SCS), so as to achieve the purpose of ensuring the utilization rate of the AGC symbol (ensuring the utilization rate of the AGC symbol to ensure the utilization rate of the time frequency resource for data transmission to a certain extent) on the basis of ensuring the data transmission performance. The current data transmission characteristics may also include: data characteristics (data requirements for transmission reliability) and/or channel characteristics (such as channel variation speed), etc.

DMRS symbols: in the LTE-V2X communication system, 15kHz SCS is fixedly adopted. In the following, a time domain format in which a DMRS is mapped in a subframe in an LTE-V2X communication system is described by taking a physical sidelink shared channel (psch) of an LTE-V2X communication system and a Physical Sidelink Control Channel (PSCCH) as an example. Fig. 1 is a schematic time domain format diagram of mapping DMRS in one subframe in an LTE-V2X communication system. Referring to fig. 1,

symbols

2, 5, 8, and 11 are symbols for mapping DMRSs, and other symbols of the subframe are used for mapping sidelink data. In this embodiment, a symbol capable of mapping DMRS is referred to as a DMRS symbol, and

symbols

2, 5, 8, and 11 in fig. 1 are all DMRS symbols.

If the DMRS is mapped in a single manner in the frequency domain resource of the DMRS symbol, the utilization rate of the time-frequency resource for data transmission is low in some data transmission processes. Therefore, the mapping manner of the signal in the frequency domain resource of the DMRS symbol needs to be adjusted according to the current data transmission characteristics, such as the time domain resource type (e.g., SCS) corresponding to the time frequency resource used for current data transmission, so as to achieve the purpose of ensuring the utilization rate of the time frequency resource used for data transmission while ensuring the data transmission performance.

In order to achieve the above object, a method in an embodiment of the present application is proposed.

Fig. 2 is a schematic diagram of a communication system according to an embodiment of the present application, and as shown in fig. 2, the communication system includes a network device and a plurality of terminal devices. The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a future fifth generation (5th generation, 5G) system, a New Radio (NR), or the like.

The terminal device of this embodiment may be a terminal device in a V2X communication system, and the network device may be a network device in a cellular mobile network.

A terminal device may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The first terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment. The terminal device of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit built into the vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in on-board module, on-board component, on-board chip, or on-board unit.

The network device may be a device for providing a wireless communication service for a terminal device, where the network device may be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved NodeB, eNB, or eNodeB in an LTE system, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, and the like, and the embodiment of the present application is not limited.

The following describes a communication method according to the present application with reference to specific embodiments based on the above communication system.

Fig. 3 is a first signaling interaction diagram provided in the embodiment of the present application, and referring to fig. 3, the method in the embodiment includes:

step S101, a first terminal device obtains first frequency domain mapping pattern information, wherein the first frequency domain mapping pattern information comprises first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used for indicating a pattern for mapping a reference signal in frequency domain resources of one OFDM symbol, and the first data mapping pattern information is used for indicating a pattern for mapping data in the frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two types of reference signal mapping pattern information, and the first data mapping pattern information is one of at least two types of data mapping pattern information.

In this embodiment, one OFDM symbol may be an AGC symbol or a DMRS symbol, and may also be another symbol used for mapping a reference signal, which is not limited in this embodiment. The first terminal device in this embodiment is a terminal device in a V2X communication system.

In this embodiment, the first frequency domain mapping pattern information is first frequency domain mapping pattern information corresponding to one OFDM symbol in this embodiment. The first frequency domain mapping pattern information in this embodiment is a mapping characteristic of the reference signal and/or the data in the frequency domain Resource of the one OFDM symbol, and the mapping characteristic may be used to determine a Resource Element (RE) used for mapping the reference signal and/or the data in the frequency domain Resource of the one OFDM symbol. Specifically, the first reference signal mapping pattern information is used to indicate a pattern in which reference signals are mapped in frequency domain resources of one OFDM symbol; the pattern of mapping the reference signal in the frequency domain resource of one OFDM symbol may be a manner or a form or a characteristic of mapping the reference signal in the frequency domain resource of the one OFDM symbol, such as: in the frequency domain resource of the one OFDM symbol, there are 1 RE for mapping the reference signal every 6 REs. The first data mapping pattern information indicates a pattern in which data is mapped in frequency domain resources of one OFDM symbol; the pattern of mapping data in the frequency domain resources of one OFDM symbol may be a manner or a form or a characteristic of mapping data in the frequency domain resources of the one OFDM symbol, such as: the density of REs used for mapping data in the frequency domain resource of the one OFDM symbol is 5/6.

In a scenario in which the first terminal device is within a coverage area of a cellular communication network, the first terminal device receives first frequency-domain mapping pattern information from the network device. In this scenario, the network device needs to first obtain the first frequency domain mapping pattern information, and then send the first frequency domain mapping pattern information to the first terminal device. The network device obtaining the first frequency domain mapping pattern information includes: determining first reference signal mapping pattern information from at least two reference signal mapping pattern information, which may be predefined or may be configured by higher layer signaling; the first data mapping pattern information is determined from at least two data mapping pattern information, which may be predefined or may be higher layer signaling configured. Specifically, when the network device acquires the first frequency domain mapping pattern information, at least two types of reference signal pattern information and at least two types of data mapping pattern information may be stored in the network device, where the at least two types of reference signal mapping pattern information may be predefined, and the at least two types of data mapping pattern information may be predefined.

Since there are at least two types of reference signal pattern information and at least two types of data mapping pattern information, there are multiple types of frequency domain mapping pattern information corresponding to one OFDM symbol in this embodiment, that is, there are multiple ways of mapping reference signals in frequency domain resources of one OFDM symbol in this embodiment.

Therefore, the network device may determine, from the multiple types of frequency domain mapping pattern information, the first frequency domain mapping pattern information that can guarantee the utilization rate of the time-frequency resources for data transmission while guaranteeing the data transmission performance according to the current data transmission characteristics, such as the current SCS.

Under the scene that the first terminal device is not in the coverage of the cellular communication network, the first terminal device acquires first frequency domain mapping pattern information, and the method comprises the following steps: determining first reference signal mapping pattern information from at least two reference signal mapping pattern information, which may be predefined or may be configured by higher layer signaling; the first data mapping pattern information is determined from at least two data mapping pattern information, which may be predefined or may be higher layer signaling configured.

Similarly, when the first terminal device acquires the first frequency domain mapping pattern information, at least two types of reference signal pattern information and at least two types of data mapping pattern information may be stored in the first terminal device, where the at least two types of reference signal mapping pattern information may be predefined or configured through a high layer signaling, and the at least two types of data mapping pattern information may be predefined or configured through a high layer signaling.

Accordingly, in this scenario, the first terminal device may also determine, according to current data transmission characteristics such as the current SCS, the first frequency domain mapping pattern information that can guarantee the utilization rate of the time-frequency resource for data transmission while guaranteeing the data transmission performance from the multiple frequency domain mapping pattern information.

Step S102, the first terminal device maps the reference signal and/or the data in the frequency domain resource of at least one OFDM symbol in the first time-frequency resource according to the first frequency domain mapping pattern information. The first time-frequency resource is used for transmitting reference signals and/or data.

For clarity of the following description, one OFDM symbol corresponding to the first frequency domain mapping pattern information in this embodiment is referred to as a first OFDM symbol. It is to be understood that the at least one OFDM symbol in the first time-frequency resource comprises a first OFDM symbol.

After the first frequency domain mapping pattern information is obtained, the first terminal device maps the reference signals and/or data in the frequency domain resources in the first frequency domain range corresponding to the first OFDM symbol according to the first frequency domain mapping pattern information, and maps the reference signals and/or data in the frequency domain resources in the first frequency domain range corresponding to the second OFDM symbol according to the frequency domain mapping pattern information of the second OFDM symbol on the second OFDM symbol except the first OFDM symbol in the at least one OFDM symbol. The first frequency domain range is a frequency domain range corresponding to the first time-frequency resource, and the frequency domain resource in the first frequency domain range corresponding to the first OFDM symbol is a frequency domain resource located in the first frequency domain range in the frequency domain resource corresponding to the first OFDM symbol.

There may be a second OFDM symbol of the first type in the at least one OFDM symbol of the first time-frequency resource, where the frequency domain mapping pattern information of the second OFDM symbol of the first type is only one and is predefined, for example, the frequency domain mapping pattern information of the second OFDM symbol of the first type is: all frequency domain resources in the first frequency domain range corresponding to the second OFDM symbol are used for mapping data.

And mapping the reference signals and/or the data in the frequency domain resources in the first frequency domain range corresponding to the second OFDM symbol of the second type according to the currently determined frequency domain mapping pattern information of the second OFDM symbol of the second type.

It is to be understood that, when the first OFDM symbol is an AGC symbol, a DMRS symbol may be present in a second OFDM symbol other than the first OFDM symbol in the at least one OFDM symbol of the first time-frequency resource, and when the first OFDM symbol is a DMRS symbol, an AGC symbol may be present in a second OFDM symbol other than the first OFDM symbol in the at least one OFDM symbol of the first time-frequency resource.

Step S103, the first terminal device sends a reference signal and/or data to the second terminal device on the first time-frequency resource.

And after the first terminal equipment maps the reference signal and/or the data in the frequency domain resource of at least one OFDM symbol in the first time-frequency resource according to the first frequency domain mapping pattern information, the first terminal equipment transmits the reference signal and/or the data on the first time-frequency resource.

And step S104, the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency domain mapping pattern information.

Specifically, the second terminal device in the present embodiment may be a terminal of the V2X communication system.

In a scenario in which the second terminal device is within the coverage of the cellular communication network, the second terminal device may receive the first frequency-domain mapping pattern information from the network device, or the second terminal device may receive the first frequency-domain mapping pattern information from the first terminal device. It is to be understood that in case the second terminal device receives the first frequency-domain mapping pattern information from the first terminal device, the first terminal device also receives the first frequency-domain mapping pattern information from the network device.

In a scenario in which the second terminal device is not within the coverage of the cellular communication network, the second terminal device receives the first frequency-domain mapping pattern information from the first terminal device.

The second terminal device may determine, according to the first frequency domain mapping pattern information, REs mapped with reference signals and/or REs mapped with data in frequency domain resources in the first frequency domain range corresponding to the first OFDM symbol, and acquire the reference signals from the REs mapped with the reference signals and/or acquire the data from the REs mapped with the data. For the second OFDM symbol, the second terminal device may further obtain data and/or reference signals from frequency domain resources in the first frequency domain range corresponding to the second OFDM symbol.

In this embodiment, since the frequency domain mapping pattern information includes reference signal pattern information and data mapping pattern information, and there are at least two types of reference signal pattern information and at least two types of data mapping pattern information, one OFDM symbol corresponds to a plurality of types of frequency domain mapping pattern information. Therefore, the network device or the first terminal device can flexibly select one frequency domain mapping pattern information matched with the current data transmission characteristic from the multiple frequency domain mapping pattern information according to the current data transmission characteristic such as SCS (instant domain resource type) corresponding to the current data transmission; the frequency domain mapping pattern information matched with the current data transmission characteristics refers to: when the reference signal and/or the data are mapped in the frequency domain resource of one OFDM symbol according to the frequency domain mapping pattern information, the utilization rate of the time frequency resource for current data transmission can be ensured on the basis of ensuring the current data transmission performance. Therefore, the method of the embodiment can ensure the utilization rate of the time-frequency resources for the current data transmission.

Various forms of the first frequency-domain pattern information in the previous embodiment are described below with specific embodiments.

A first form of the first frequency-domain mapping pattern information: the first frequency-domain mapping pattern information may further include a first pre-selected frequency-domain offset and a first set of frequency-domain offset parameters for determining REs used for mapping the reference signals when the reference signals need to be mapped in frequency-domain resources within a first frequency-domain range corresponding to one OFDM symbol, and may further include a second frequency-domain offset for mapping the REs of the data when the data needs to be mapped in frequency-domain resources within the first frequency-domain range corresponding to one OFDM symbol. The meaning of the first frequency domain range in this embodiment is the same as that in the first embodiment, and is not described herein again.

The first reference signal mapping pattern information, the first data mapping pattern information, the first pre-selected frequency domain offset, the first frequency domain offset parameter set, and the second frequency domain offset for mapping REs of data are explained in detail below.

In this embodiment, in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, every consecutive N REs are a mapping group, and the patterns of mapping reference signals and/or data on each mapping group are the same.

In one approach, pattern information is mapped for a first reference signal: the first reference signal mapping pattern information includes information indicating that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that consecutive N REs are one mapping group; or, the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information includes information indicating that there are M REs for mapping the reference signal among consecutive N REs, where M ≦ N, and M is an integer, that is, each mapping group includes M REs for mapping the reference signal.

In another mode, for the first reference signal mapping pattern information: the first reference signal mapping pattern information is used to indicate that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information is used to indicate that consecutive N REs are one mapping group; or, the first reference signal mapping pattern information is used to indicate that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; or, the first reference signal mapping pattern information is used to indicate that there are M REs for mapping the reference signal in consecutive N REs, where M ≦ N, i.e., each mapping group includes M REs for mapping the reference signal.

It can be understood that, when there is no RE for mapping the reference signal in the frequency domain resources within the first frequency domain range corresponding to one OFDM symbol, the first reference signal mapping pattern information includes information indicating that there is no RE for mapping the reference signal in the frequency domain resources of one OFDM symbol, such as the information is "0"; alternatively, the first reference signal mapping pattern information includes information indicating that M REs for mapping the reference signal exist among the N REs, when M is 0. When there are REs for mapping reference signals in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, the first reference signal mapping pattern information includes information indicating that N REs are one mapping group; or, the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; alternatively, the first reference signal mapping pattern information includes information indicating that M REs for mapping the reference signal exist among the N REs, when M is not 0.

Alternatively, N may be any one of the following: 1. 2, 3, 4, 6 and 12.

Alternatively, M may be any one of the following: 0, 1, 2, 3, 4, 6.

In one mode, in the case that there are REs for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, when N is 1, M is 1; when N is 2, M is 1; when N is 3, M may be 1; when N is 4, M may be 1 or 2; when N is 6, M may be 1 or 2 or 3; when N is 12, M may be 1 or 2 or 3 or 4 or 6.

The mapping set is further described below in conjunction with fig. 4. Fig. 4 is a schematic diagram of a mapping group according to an embodiment of the present application. Referring to fig. 4, fig. 4 shows mapping groups on 1 Resource Block (RB) when N is 4, and each consecutive 4 REs is a mapping group, and there are 3 mapping groups on one RB: map group 41, map group 42, and map group 43, where map group 41 includes RE411, RE412, RE413, RE 414.

For a first pre-selected frequency domain offset: the first RE or the last RE in the mapping group is a reference RE, the RE with the least RE spaced from the reference RE among the M REs for mapping the reference signal in the mapping group is an initial RE, and the first pre-selected frequency domain offset is a frequency domain offset between the initial RE and the reference RE. In one approach, the first pre-selected frequency-domain offset may be the number of REs spaced between the initial RE and the reference RE plus 1 when the reference RE and the initial RE are different, and may be 0 when the initial RE and the reference RE are the same. It is to be understood that when the first frequency-domain mapping pattern information includes the first pre-selected frequency-domain offset, M is a positive integer less than or equal to N, i.e., a mapping group exists REs for mapping the reference signals.

The frequencies of subcarriers corresponding to each RE in the N REs included in one mapping group are different, and if a first RE in the mapping group is an RE of a subcarrier corresponding to a minimum frequency in the N REs, a last RE in the mapping group is an RE of a subcarrier corresponding to a maximum frequency in the N REs; if the first RE in the mapping group is the RE corresponding to the subcarrier with the largest frequency in the N REs, the last RE in the mapping group is the RE corresponding to the subcarrier with the smallest frequency in the N REs.

With continued reference to fig. 4, if RE411 in mapped group 41 is the first RE in mapped group 41, RE414 is the last RE in mapped group 41. If RE414 in mapped group 41 can be the first RE in mapped group 41, RE411 is the last RE in mapped group 41.

In the case where RE411 is the first RE in mapping group 41 and RE414 is the last RE in mapping group 41, if RE411 is the reference RE, and RE411 and RE412 are used to map the reference signal, then RE411 is the RE with the smallest interval RE between RE411 and reference RE — RE411, then RE411 is the starting RE, and the starting RE and the reference RE are the same, and then the first pre-selected frequency domain offset is 0. Conversely, if the first pre-selected frequency domain offset is 0, in the case that the RE411 is the reference RE, the initial RE is the same as the reference RE, and is all the RE411, and the RE411 is one of the REs for mapping the reference signal.

In the case where RE411 is the first RE in mapping group 41 and RE414 is the last RE in mapping group 41, if RE414 is the reference RE and RE411 and RE412 are used to map the reference signal, RE412 is the RE with the smallest RE interval from reference RE-RE 414, that is, RE412 and RE414 are spaced by 1 RE, RE412 is the starting RE, and RE is spaced by 1 RE from the starting RE and reference RE, where the first preselected frequency domain offset is 1+1 — 2. Conversely, if the first pre-selected frequency domain offset is 2, then the initial RE is RE412 if RE414 is the reference RE.

For a first set of frequency-domain bias parameters: the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping the reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, the first RE or a last RE in the mapping group is a reference RE, and the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE. In one approach, if the first RE is the same as the reference RE, the first frequency domain offset of the first RE is 0, and if the first RE is different from the reference RE, the first frequency domain offset of the first RE is the number of REs spaced between the first RE and the reference RE plus 1. It can be understood that the number of parameters included in the first frequency-domain offset parameter set is the same as the number M of REs used for mapping the reference signals in the mapping group, and the M parameters included in the first frequency-domain offset parameter set and the M REs used for mapping the reference signals in the mapping group have a one-to-one correspondence.

The first set of frequency-domain bias parameters may be one of the following sets of frequency-domain parameters: (0),(0,1),(0,1,2),(0,1,2,3),(0,1,2,3,4,5). Wherein, when N is 1, the first frequency domain offset parameter set is (0); when N ═ 2, the first frequency-domain bias parameter set may be (0); the first frequency-domain bias parameter set may be (0) when N is 3. When N is 4, the first frequency-domain bias parameter set may be (0) or (0, 1); the first frequency-domain bias parameter set may be (0) or (0,1,2) when N is 6. When N is 6, the first frequency-domain bias parameter set may be (0) or (0,1,2,3,4, 5). It is to be understood that the frequency domain parameter set is not limited to the 5 listed above, and the present embodiment does not limit the specific form of the frequency domain offset parameter set.

Illustratively, with continuing reference to fig. 4, if the first pre-selected frequency domain offset is 0 and the first set of frequency domain offset parameters is (0,1), then there are 2 REs in the mapping group 41 for mapping the reference signals. From a first set of frequency-domain offset parameters of (0,1), 2 first frequency-domain offsets are available: one first frequency-domain offset is the sum 0 of the parameter 0 in the first frequency-domain offset parameter set and the first pre-selected frequency-domain offset 0, and the other is the sum 1 of the parameter 1 in the first frequency-domain offset parameter set and the first pre-selected frequency-domain offset 0, i.e. if the reference RE is RE411, then RE411 with the first frequency-domain offset of 0 and RE412 with the first frequency-domain offset of 1 are 2 REs for mapping the reference signal. Where RE411 corresponds to parameter 0 in the first frequency-domain offset parameter set and RE412 corresponds to parameter 1 in the first frequency-domain offset parameter set.

As described above, the first reference signal mapping pattern information, the first pre-selected frequency domain offset, and the first frequency domain offset parameter set are described, and it is known that, when a reference signal needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, the number N of REs included in a mapping group (which may be obtained from the first reference signal mapping pattern information or the first data mapping pattern information described later), the first pre-selected frequency domain offset, and the first frequency domain offset parameter set jointly determine REs used for mapping the reference signal in the mapping group. Therefore, the first terminal device and the second terminal device may determine, according to the number N of REs included in the mapping group, the first pre-selected frequency domain offset, and the first set of frequency domain offset parameters, REs used for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, which may be specifically determined by the following formula:

K_R1＝N*n+k′+Δ_R1and (4) a formula I.

Wherein, K_R1Is the index or number of RE used for mapping the reference signal in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, k' is the parameter in the first frequency domain offset parameter set, Δ_R1Is a first pre-selected frequency domain offset, n is a natural number, and n is 0, 1 and 2 … … in sequence. It can be understood that after the value of n is determined, the first frequency domain needs to be biased And after each parameter k' in the parameter set is brought into the calculation in the formula I, updating the value of n.

Correspondingly, after obtaining the first frequency domain mapping pattern information, when a reference signal is mapped in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, the second terminal device may determine, according to the first reference signal mapping pattern information or the first data mapping pattern included in the first frequency domain mapping pattern information, the number N of REs included in the mapping group, and determine, according to the number N of REs included in the mapping group, the first frequency domain offset parameter set, and the first pre-selected frequency domain offset, REs in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, to which the reference signal is mapped; alternatively, the REs in which the reference signals are mapped in the frequency domain resources within the first frequency domain range corresponding to one OFDM symbol may be determined according to first reference signal mapping pattern information (when information capable of indicating that N is 1 is included) included in the first frequency domain mapping pattern information.

Mapping style information for the first data: the first data mapping pattern information comprises a first density of REs used for mapping data in the mapping group, the first density is a ratio of the number H of the REs used for mapping data in the mapping group to N, H is an integer, and H is less than or equal to N; or, the first data mapping pattern information includes first indication information indicating that, of frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, REs other than REs used for mapping the reference signal are REs used for mapping data; or, the first data mapping pattern information includes second indication information indicating that there are no REs for mapping data in frequency domain resources in the first frequency domain range corresponding to one OFDM symbol. Wherein, the first data mapping pattern information includes the first indication information and includes the first density relative to the first data mapping pattern, which can reduce signaling overhead.

Wherein the first density may be any one of: 0. 1/2, 2/3, 1/3, 3/4, 2/4, 1/4, 5/6, 4/6, 3/6, 2/6, 1/6, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12. Alternatively, the denominator of the first density may be the same as the number N of REs included in one mapping group, i.e., in the case where the first density is not 0, the number N of REs included in one mapping group may be indicated by the denominator of the first density, and the numerator of the first density indicates the number H of REs used for mapping data on the mapping group.

Alternatively, when the first data mapping pattern information includes the first density of REs for mapping data in the mapping set and the first density is neither 0 nor 1, the first reference signal mapping pattern information may be any one of the above. When the first data mapping pattern information includes a first density of REs for mapping data in the mapping group and the first density is 1, the first reference signal mapping pattern information may include information indicating that M REs for mapping reference signals exist among the N REs, when M is equal to 0, or may include information indicating that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol.

Optionally, in a case that the first density is 0 or the first data mapping pattern information includes first indication information or the first data mapping pattern information includes second indication information, if there are REs used for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first reference signal mapping pattern information may include information indicating that N REs are one mapping group, or the first reference signal mapping pattern information may include information indicating that M REs used for mapping the reference signal exist in the N REs, where M is not 0.

Optionally, in a case that the first data mapping pattern information includes the first indication information, if there is no RE for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first reference signal mapping pattern information may include information indicating that there are M REs for mapping the reference signal in the N REs, where M is equal to 0.

The relationship between the first density and N is explained below.

When there is no RE for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, when N is 1, the first density is 1; when N is 2, the first density may be 1/2; when N is 3, the first density may be 1/3 or 2/3; when N ═ 4, the first density can be 1/2 or 2/4 or 3/4; when N ═ 6, the first density can be 5/6 or 4/6 or 3/6/or 2/6 or 1/6; when N-12, the first density may be 1/12 or 2/12 or 3/12 or 4/12 or 5/12 or 6/12 or 7/12 or 8/12 or 9/12 or 10/12 or 11/12.

When there are REs for mapping the reference signal in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, when N is 1, the first density is 0; when N ═ 2, the first density can be 0 or 1/2; when N ═ 3, the first density can be 0 or 1/3 or 2/3; when N ═ 4, the first density can be 0 or 1/2 or 2/4 or 3/4; when N ═ 6, the first density can be 0 or 5/6 or 4/6 or 3/6/or 2/6 or 1/6; when N-12, the first density may be 0 or 1/12 or 2/12 or 3/12 or 4/12 or 5/12 or 6/12 or 7/12 or 8/12 or 9/12 or 10/12 or 11/12.

For a second frequency domain offset of REs in the mapping group used for mapping data: the first RE or the last RE in the mapping group is a reference RE, and for any second RE of the H REs for mapping data in the mapping group, the second frequency domain offset of the second RE is a frequency domain offset between the second RE and the reference RE. In one approach, if the second RE is the same as the reference RE, the second frequency domain offset of the second RE is 0, and if the second RE is different from the reference RE, the second frequency domain offset of the second RE is the number of REs spaced between the second RE and the reference RE plus 1. Wherein the second RE is any one of the H REs for mapping data in the mapping group. The meaning of the reference RE is the same as that of the aforementioned reference RE, the meaning of the first RE in one mapping group is the same as that of the first RE in the aforementioned one mapping group, and the meaning of the last RE in one mapping group is the same as that of the last RE in the aforementioned one mapping group.

It can be appreciated that the number of second frequency domain offsets is the same as the number H of REs in the mapping group used for mapping data. The second frequency domain offset ranges from 0 to N-1, including 0 and N-1. That is, the first frequency-domain mapping pattern information may include second frequency-domain offsets of the H REs in the mapping group, respectively, for mapping data.

Illustratively, with continued reference to fig. 4, if one RE411 in mapping group 41 is the reference RE, the first density is 2/4, there are 2 second frequency-domain offsets: 2. 3, then RE413 and RE414 are the REs in mapping group 41 for mapping data.

As described above, it can be seen that when there are REs for mapping data in frequency domain resources in the first frequency domain range corresponding to one OFDM symbol (when the first data mapping pattern information includes the first indication information or includes a first density of REs for mapping data in the mapping group and the first density is not 0), the number N of REs included in the mapping group (which may be obtained according to the first reference signal mapping pattern information or the first data mapping pattern information) and the second frequency domain offset jointly determine the REs for mapping data in one mapping group. Wherein, when the first data mapping pattern information includes the first indication information, the first data mapping pattern information and the REs for mapping the reference signal may also determine REs for mapping the reference signal in one mapping group. Therefore, the first terminal device and the second terminal device may determine, according to the number N of REs included in the mapping group and the second frequency domain offset, REs used for mapping data in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, which may specifically be determined by the following formula two:

K_D＝N*n+Δ_DAnd a second formula.

Wherein, K_DFor the index or number, Δ, of REs of the mapping data in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol_DAnd n is a natural number, and is 0, 1 and 2 … … in sequence. It can be understood that after the value of n is determined, the values of n are updated after all the second frequency domain offsets are calculated by the formula two.

That is, after obtaining the first frequency domain mapping pattern information, when data is mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the second terminal device may determine, according to the first reference signal mapping pattern information or the first data mapping pattern included in the first frequency domain mapping pattern information, the number N of REs included in the mapping group, and determine, according to the number N of REs included in the mapping group and the second frequency domain offset, REs mapped with data in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol; alternatively, the number N of REs included in the mapping group may be determined according to the first reference signal mapping pattern information or the first data mapping pattern included in the first frequency domain mapping pattern information, the REs mapped with the reference signals in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol may be determined according to the number N of REs included in the mapping group, the first frequency domain offset parameter set, and the first pre-selected frequency domain offset, and the REs mapped with the data in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol may be determined according to the first data mapping pattern information and the REs used for mapping the reference signals (this is applicable to the case where the first data mapping pattern information includes the first indication information). Alternatively, REs with data mapped in frequency domain resources in the first frequency domain range corresponding to one OFDM symbol may be determined according to the first reference signal mapping pattern information and the first data mapping pattern information included in the first frequency domain mapping pattern information (applicable to a case where the first data mapping pattern information includes the first indication information or includes a first density of 1, and the first reference signal mapping pattern information includes information indicating that no REs for mapping the reference signal exist in frequency domain resources in the first frequency domain range corresponding to one OFDM symbol or includes information indicating that 0 REs exist in consecutive N REs).

The first form of the first frequency-domain mapping pattern information for one OFDM symbol is described above. It is to be understood that the first frequency-domain mapping pattern information may also be referred to as information of the first frequency-domain mapping pattern. As shown in the embodiment shown in fig. 3, one OFDM symbol corresponds to a plurality of frequency domain mapping patterns, and the first frequency domain mapping pattern is one of the plurality of frequency domain mapping patterns. In one approach, information of a partial frequency domain mapping pattern of the plurality of frequency domain mapping patterns may be as shown in table 1:

TABLE 1

It is to be understood that the frequency domain mapping pattern corresponding to one OFDM symbol is not limited to the 34 frequency domain mapping patterns in table 1, and there are a plurality of frequency domain mapping patterns that are not listed. A plurality of frequency domain mapping patterns may be stored in the network device, the first terminal device, and the second terminal device, and the storage manner may be as shown in table 1, at this time, each item of information included in one frequency domain mapping pattern corresponds to one index or number, and when the network device or the first terminal device sends the first frequency domain mapping pattern information to the second terminal device, the index or number of the first frequency domain mapping pattern may be sent.

In addition, a plurality of frequency domain mapping patterns may not be stored in the network device, the first terminal device, and the second terminal device, and at this time, each item of information included in the frequency domain mapping pattern information in this form is combined in an arbitrary manner and then stored in a corresponding list, or each item of information included in the frequency domain mapping pattern information in this form is independently stored in a respective list.

The frequency domain mapping pattern will be further described with reference to fig. 5 to 8. Fig. 5 is a first schematic diagram of a frequency domain mapping pattern provided in an embodiment of the present application, fig. 6 is a second schematic diagram of the frequency domain mapping pattern provided in the embodiment of the present application, fig. 7 is a third schematic diagram of the frequency domain mapping pattern provided in the embodiment of the present application, and fig. 8 is a fourth schematic diagram of the frequency domain mapping pattern provided in the embodiment of the present application.

Referring to fig. 5, fig. 5 is a schematic diagram of the frequency domain mapping pattern numbered 9 in table 1, where one mapping group includes 2 REs, one mapping group includes 1 RE for mapping a reference signal, and the remaining 1 RE in the mapping group is neither used for mapping the reference signal nor for mapping data. Accordingly, in case that the first frequency-domain mapping pattern information is the information of the frequency-domain mapping pattern numbered 9, then the first reference signal mapping pattern information may include information indicating that consecutive 2 REs are one mapping group, the first data mapping pattern information may be the first density 0 or the second indication information, the first pre-selected frequency-domain offset in the first frequency-domain mapping pattern is 0, and the first frequency-domain offset parameter set is (0). Since there are no REs for mapping data in the frequency domain resources of one OFDM symbol, the second frequency domain offset is not included in the first frequency domain mapping pattern. It can be understood that, at this time, the reference RE is an RE corresponding to the smallest frequency subcarrier in one mapping group.

Referring to fig. 6, fig. 6 is a schematic diagram of a frequency domain mapping pattern numbered 8 in table 1, where one mapping group includes 2 REs, one mapping group includes 1 RE for mapping a reference signal, and the remaining 1 RE of the mapping group is used for mapping data. Accordingly, in case that the first frequency-domain mapping pattern information is information of the frequency-domain mapping pattern numbered 8, the first reference signal mapping pattern information may include information indicating that consecutive 2 REs are one mapping group, or the first reference signal mapping pattern information may include information indicating that there are REs for mapping reference signals in the frequency-domain resources of one OFDM symbol, the first data mapping pattern information may be the first density 1/2 or the first indication information, a first pre-selected frequency-domain offset in the first frequency-domain mapping pattern information is 1, the first frequency-domain offset parameter set is (0), and a second frequency-domain offset in the first frequency-domain mapping pattern is 0. It can be understood that, at this time, the reference RE is an RE corresponding to the smallest frequency subcarrier in one mapping group.

Referring to fig. 7, fig. 7 is a schematic diagram of the frequency domain mapping pattern numbered 15 in table 1, where one mapping group includes 4 REs, one mapping group includes 2 REs for mapping reference signals, and the mapping group includes 1 RE for mapping data, so that there are 1 second frequency domain offsets. Accordingly, in case that the first frequency-domain mapping pattern information is the information of the frequency-domain mapping pattern numbered 15, the first reference signal mapping pattern information may include information indicating that 2 of the consecutive 4 REs exist for mapping the reference signal, or include information indicating that the consecutive 2 REs are one mapping group, or include information indicating that the REs for mapping the reference signal exist in the frequency-domain resources of one OFDM symbol, the first data mapping pattern information may be the first density 1/4, and the first pre-selected frequency-domain offset in the first frequency-domain mapping pattern information is 0, the first frequency-domain offset parameter set is (0,1), and the second frequency-domain offset in the first frequency-domain mapping pattern is 2. It can be understood that, at this time, the reference RE is an RE corresponding to the smallest frequency subcarrier in one mapping group.

Referring to fig. 8, fig. 8 is a schematic diagram of the frequency domain mapping pattern numbered 14 in table 1, where one mapping group includes 4 REs, one mapping group includes 2 REs for mapping the reference signal, the two REs are consecutive REs, and the remaining 2 REs in the mapping group are used for mapping data, so that there are 2 second frequency domain offsets. Accordingly, in case that the first frequency-domain mapping pattern information is the information of the frequency-domain mapping pattern of number 14, the first reference signal mapping pattern information may include information indicating that there are 2 consecutive 4 REs for mapping the reference signal, or include information indicating that the consecutive 2 REs are one mapping group, or include information indicating that there are REs for mapping the reference signal in the frequency-domain resources of one OFDM symbol, the first data mapping pattern information is the first density 2/4 or the first indication information, the first pre-selected frequency-domain offset in the first frequency-domain mapping pattern is 1, the first frequency-domain offset parameter set is (0,1), and the 2 second frequency-domain offsets are 0, 3. It can be understood that, at this time, the reference RE is an RE corresponding to the smallest frequency subcarrier in one mapping group.

A second form of the first frequency-domain mapping pattern information: the first frequency-domain mapping pattern information may further include a first set of frequency-domain offset parameters when the reference signal needs to be mapped in the frequency-domain resources within the first frequency-domain range corresponding to one OFDM symbol, and the first frequency-domain mapping pattern information may further include a second frequency-domain offset for the REs in the mapping group when the data needs to be mapped in the frequency-domain resources within the first frequency-domain range corresponding to one OFDM symbol.

In this form, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first pre-selected frequency domain offset. Therefore, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain the first pre-selected frequency domain offset.

Before the first terminal device obtains the first pre-selected frequency domain offset, a method for obtaining the first reference signal mapping pattern information by the first terminal device is explained in detail.

In a first embodiment, the first terminal device obtaining the first reference signal mapping pattern information includes: the first terminal device determines first reference signal mapping pattern information from the at least two reference signal mapping pattern information according to the current data transmission characteristics. The meaning of the current data transmission characteristic in this embodiment is the same as in the embodiment shown in fig. 3. At this time, the second terminal device may receive the first reference signal mapping pattern information from the first terminal device.

In a second implementation, the first terminal device obtaining the first reference signal mapping pattern information includes: the first terminal device determines first reference signal mapping pattern information from the at least two reference signal mapping pattern information according to the first data mapping pattern information and the current data transmission characteristic. The first data mapping pattern information corresponds to one or more reference signal mapping pattern information, and the first terminal equipment determines the first reference signal mapping pattern information from the one or more reference signal mapping pattern information corresponding to the first data mapping pattern information according to the current data transmission characteristics. At this time, the second terminal device may receive the first reference signal mapping pattern information from the first terminal device.

In a third embodiment, the first terminal device obtaining the first reference signal mapping pattern information includes: first reference signal mapping pattern information is received from a network device. The method for the network device to obtain the first reference signal mapping pattern information is the same as the method for the first terminal device to obtain the first reference signal mapping pattern information in the first embodiment or the second embodiment. At this time, the second terminal device may receive the first reference signal mapping pattern information from the first terminal device or the network device.

The first terminal device may then obtain the first pre-selected frequency domain offset by implementing the following.

In a first embodiment, in a case that a reference signal needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, and N is 1, the obtaining, by the first terminal device, a first preselected frequency domain offset includes: the first terminal acquires 0 as a first pre-selected frequency domain offset. At this point, the second terminal device may receive the first pre-selected frequency domain offset from the first terminal device.

In a second embodiment, in a case that a reference signal needs to be mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by a first terminal device, a first pre-selected frequency domain offset includes: the first terminal acquires 0 as a first pre-selected frequency domain offset. At this point, the second terminal device may receive the first pre-selected frequency domain offset from the first terminal device.

In a third embodiment, the first terminal device obtaining the first pre-selected frequency domain offset comprises: the first terminal determines a first pre-selected frequency domain offset according to the N, the first frequency domain offset parameter set and a first preset rule, wherein the first preset rule is that the sum of the first pre-selected frequency domain offset and the maximum parameter in the first frequency domain offset parameter set is less than or equal to N-1. Wherein the value of N may be obtained according to the first reference signal mapping pattern information, or may be determined by a denominator of the first density included in the first data mapping pattern. At this point, the second terminal device may receive the first pre-selected frequency domain offset from the first terminal device.

In a fourth embodiment, the first terminal device obtaining the first pre-selected frequency domain offset comprises: a first pre-selected frequency domain offset is received from a network device. At this time, the method for the network device to obtain the first preselected frequency domain offset is the same as the method for the first terminal device to obtain the first preselected frequency domain offset in the first embodiment, the second embodiment, or the third embodiment. At this point, the second terminal device may receive the first pre-selected frequency domain offset from the first terminal device or the network device.

It can be understood that, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol and N is 1, there is only a possibility that M is 1, and therefore, when N is 1, only the first preselected frequency domain offset is 0, and the first preselected frequency domain offset may be predetermined to be 0. At this time, the first terminal device and the second terminal device may obtain the agreed first pre-selected frequency domain offset 0.

Optionally, in a case that the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, when N is 1, only M is 1, and therefore, when N is 1, only in a case that the first frequency domain offset parameter set is (0), the first terminal device may not acquire the first pre-selected frequency domain offset, where the parameter 0 included in the first frequency domain offset parameter set is the first pre-selected frequency domain offset and is also the first frequency domain offset used for mapping the RE of the reference signal.

Correspondingly, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps reference signals and/or data in frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the first pre-selected frequency domain offset.

When a reference signal is mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by the second terminal device, the reference signal and/or data on the first time-frequency resource according to the first frequency domain mapping pattern information may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first pre-selected frequency-domain offset.

It can be understood that, in the second form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A third form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a first pre-selected frequency domain offset when the reference signal needs to be mapped in frequency domain resources within a first frequency domain range corresponding to one OFDM symbol, and the first frequency domain mapping pattern information may further include a second frequency domain offset used for mapping REs of data in a mapping group when the data needs to be mapped in frequency domain resources within the first frequency domain range corresponding to one OFDM symbol.

Specifically, in this form, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first frequency domain offset parameter set. When the reference signal needs to be mapped in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain a first set of frequency domain offset parameters.

The first terminal device may obtain the first set of frequency domain offset parameters according to, but not limited to, the following three embodiments.

In a first embodiment, when a reference signal needs to be mapped in frequency-domain resources in a first frequency-domain range corresponding to one OFDM symbol, and N is 1, acquiring, by a first terminal device, a first set of frequency-domain offset parameters includes: the first terminal device obtains a frequency domain parameter set (0) of the plurality of frequency domain parameter sets as a first frequency domain offset parameter set. At this time, the second terminal device may receive the first set of frequency domain bias parameters from the first terminal device.

In a second embodiment, the obtaining, by the first terminal device, the first set of frequency-domain bias parameters includes: the first terminal device determines a first frequency domain offset parameter set from the plurality of frequency domain parameter sets according to N, a first pre-selected frequency domain offset, a second preset rule and the current data transmission characteristic, wherein the second preset rule is that the number of parameters included in the first frequency domain offset parameter set is less than N, and the sum of the maximum parameters in the first pre-selected frequency domain offset and the first frequency domain offset parameter set is less than or equal to N-1. As described above, the first set of frequency-domain offset parameters includes the same number of parameters as the number M of REs in the mapping group used for mapping the reference signals, and thus, in one approach, the first terminal device determines N and M based on the current data transmission characteristics, and then determines a first set of frequency-domain offset parameters that includes a number of parameters equal to M and that satisfies that the sum of the first pre-selected frequency-domain offset and the largest parameter in the first set of frequency-domain offset parameters is less than or equal to N-1. At this time, the second terminal device may receive the first set of frequency domain bias parameters from the first terminal device.

In a third implementation, the obtaining, by the first terminal device, the first set of frequency-domain bias parameters includes: the first terminal device current data transmission characteristics then determine a first set of frequency domain offset parameters from the plurality of sets of frequency domain parameters. As described above, the first frequency-domain offset parameter set includes the same number of parameters as the number M of REs in the mapping group for mapping the reference signal, and thus, in one manner, the first terminal device determines N and M according to the current data transmission characteristics, and determines a first frequency-domain offset parameter set including a number of parameters equal to M. At this time, the second terminal device may receive the first set of frequency domain bias parameters from the first terminal device.

In a fourth embodiment, the obtaining, by the first terminal device, the first set of frequency domain bias parameters includes: a first set of frequency-domain bias parameters is received from a network device. At this time, the method for the network device to obtain the first frequency domain offset parameter set is the same as the method for the first terminal device to obtain the first frequency domain offset parameter set in the first embodiment, the second embodiment, or the third embodiment. At this time, the second terminal device may receive the first set of frequency domain bias parameters from the first terminal device or the network device.

It can be understood that, when a reference signal needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, when N is 1, only M is 1, and the first frequency domain offset parameter set can only be (0), and therefore, when N is 1, the first frequency domain offset parameter set may also be (0) that is agreed in advance, and the first terminal device and the second terminal device acquire the agreed first frequency domain offset parameter set (0).

Optionally, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, when N is 1, only one possibility exists that M is 1, and the first frequency domain offset parameter set can only be (0), at this time, the first terminal device may not obtain the first frequency domain offset parameter set, where the first preselected frequency domain offset is the first frequency domain offset of the RE used for mapping the reference signal in the mapping group.

Correspondingly, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the first frequency domain offset parameter set.

When a reference signal is mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the second terminal device may refer to the signal and/or data on the first time-frequency resource according to the first frequency domain mapping pattern information, and may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set.

It can be understood that, in the third form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to one index or number, that is, each piece of information included in the frequency domain mapping pattern information in this form corresponds to one index or number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A fourth form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a first frequency domain offset parameter set and a first pre-selected frequency domain offset when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol.

In this form, when data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the second frequency domain offset of the REs used for mapping data in the mapping group, and the first terminal device may further obtain the second frequency domain offset of the REs used for mapping data in the mapping group.

Before describing a method for the first terminal device to obtain the second frequency domain offset of the RE used for mapping data in the mapping group, a method for the first terminal device to obtain the first data mapping pattern information is described. The method for acquiring the first data mapping style information by the first terminal device may be implemented by, but not limited to, the following two embodiments.

In a first embodiment, the first terminal device determines the first data mapping pattern information from the at least two data mapping pattern information according to the current data transmission characteristics. At this time, the second terminal device may receive the first data mapping pattern information from the first terminal device.

In a second embodiment, the first terminal device determines the first data mapping pattern information from the at least two reference signal mapping pattern information according to the first reference signal mapping pattern information and the current data transmission characteristic. At this time, the second terminal device may receive the first data mapping pattern information from the first terminal device. The first reference signal mapping pattern information corresponds to one or more data mapping pattern information, and the first terminal device determines the first data mapping pattern information from the one or more data mapping pattern information corresponding to the first reference signal mapping pattern information according to the current data transmission characteristics.

In a third embodiment, a first terminal device receives first data mapping pattern information from a network device. At this time, the method for the network device to obtain the first data mapping pattern information is the same as the method for the first terminal device to obtain the first data mapping pattern information in the first embodiment or the second embodiment. At this time, the second terminal device may receive the first data mapping pattern information from the first terminal device or the network device.

Then, the first terminal device obtains the second frequency domain offset for mapping the REs in the mapping group, which can be implemented by, but is not limited to, the following six embodiments.

In a first embodiment, when there are no REs for mapping a reference signal in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, and the first density included in the first data mapping pattern information or the first data mapping pattern information is 1, the obtaining, by the first terminal device, the second frequency domain offset includes: the first terminal device obtains 0 as the second frequency domain offset. At this time, the second terminal device may receive the second frequency domain offset from the first terminal device.

In a second embodiment, there are no REs for mapping a reference signal in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, and the first data mapping pattern information includes a first density of neither 1 nor 0 or the first data mapping pattern information includes first indication information, and the first terminal device obtains the second frequency domain offset includes: and the first terminal equipment determines a second frequency domain offset according to the N, the first density and a third preset rule, wherein the third preset rule is that the second frequency domain offset is between 0 and N-1. Wherein the product of the first density and N is the number H of second frequency domain offsets that the first terminal device needs to determine. At this time, the second terminal device may receive the second frequency domain offset from the first terminal device.

In a third embodiment, when there are no REs for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first data mapping pattern information includes a first density, a denominator of the first density can characterize the number N of REs included in the mapping group, and the first density is not 1, the obtaining, by the first terminal device, the second frequency domain offset includes: and the first terminal equipment determines a second frequency domain offset according to the first density and a third preset rule, wherein the third preset rule is that the second frequency domain offset is between 0 and N-1. The numerator of the first density is the number H of second frequency domain offsets that the first terminal device needs to determine. At this time, the second terminal device may receive the second frequency domain offset from the first terminal device.

In a fourth embodiment, when there are REs used for mapping the reference signal in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, and the first density included in the first data mapping pattern information is neither 1 nor 0, or the first data mapping pattern information includes the first indication information, the obtaining, by the first terminal device, the second frequency domain offset includes: the first terminal device determines a second frequency domain offset according to N, the first set of frequency domain offset parameters, the first pre-selected frequency domain offset, the first density, and a fourth preset rule. The fourth predetermined rule is that the second frequency domain offset is between 0 and N-1 and that the first frequency domain offset and the second frequency domain offset of the RE used for mapping the reference signal in the mapping group are different. Optionally, the determining, by the first terminal device, the second frequency domain offset according to N, the first frequency domain offset parameter set, the first pre-selected frequency domain offset, the first density, and a fourth preset rule includes: the first terminal device may determine a first frequency domain offset for mapping REs of the reference signal in the mapping group according to the first set of frequency domain offset parameters and the first pre-selected frequency domain offset; and the first terminal equipment determines a second frequency domain offset according to the N, the first frequency domain offset and a fourth preset rule. At this time, the second terminal device may receive the second frequency domain offset from the first terminal device.

In a fifth embodiment, when there are REs used for mapping a reference signal in frequency-domain resources in a first frequency-domain range corresponding to one OFDM symbol, and the first data mapping pattern information includes a first density, and a denominator of the first density can characterize the number N of REs included in the mapping group, the obtaining, by the first terminal device, the second frequency-domain offset includes: the first terminal device determines a second frequency domain offset according to the first set of frequency domain offset parameters, the first pre-selected frequency domain offset, the first density and a fourth preset rule. The fourth predetermined rule is that the second frequency domain offset is between 0 and N-1 and that the first frequency domain offset and the second frequency domain offset of the RE used for mapping the reference signal in the mapping group are different. Optionally, the determining, by the first terminal device, the second frequency domain offset according to the first frequency domain offset parameter set, the first pre-selected frequency domain offset, the first density, and a fourth preset rule includes: the first terminal device may determine a first frequency domain offset for mapping REs of the reference signal in the mapping group according to the first set of frequency domain offset parameters and the first pre-selected frequency domain offset; and the first terminal equipment determines the second frequency domain offset according to the first density, the first frequency domain offset and a fourth preset rule. At this time, the second terminal device may receive the second frequency domain offset from the first terminal device.

In a sixth implementation manner, the obtaining, by the first terminal device, the second frequency domain offset includes: a second frequency domain offset is received from the network device. The method for the network device to obtain the second frequency domain offset is the same as the method for the first terminal device to obtain the second frequency domain offset in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, or the fifth embodiment. At this time, the second terminal device may receive the second frequency domain offset from the first terminal device or the network device.

It can be understood that, when there is no RE for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, and the first density included in the first data mapping pattern information or the first data mapping pattern information is 1, the second frequency domain offset can only be 0, and therefore, when N is 1, the second frequency domain offset may also be predetermined to be 0, and at this time, the first terminal device and the second terminal device may obtain the predetermined second frequency domain offset 0.

Optionally, when the data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the second frequency domain offset of the REs used for mapping the data in the mapping group may not be obtained under the following conditions: (1) the second frequency domain offset for the REs for mapping data in the mapping group may not be acquired if the first data mapping pattern information includes the first indication information. (2) When the first density included in the first data mapping pattern information is 1, the second frequency domain offset of the RE used for mapping data in the mapping group may not be acquired. (3) When the first reference signal mapping pattern information indicates that the number N of REs included in one mapping group is 2, and the first density included in the first data mapping pattern information is 1/2, one RE in one mapping group is used for mapping a reference signal, and another RE is used for mapping data.

Correspondingly, when data needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, of the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the second frequency domain offset.

When data is mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by the second terminal device, the reference signal and/or the data on the first time-frequency resources according to the first frequency domain mapping pattern information may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the second frequency-domain offset.

It can be understood that, in the fourth form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to one index or number, that is, each piece of information included in the frequency domain mapping pattern information in this form corresponds to one index or number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A fifth form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a second frequency domain offset for mapping REs of data in the mapping group, when the data needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol.

In this form, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first frequency domain offset parameter set and the first pre-selected frequency domain offset. Therefore, when the reference signal needs to be mapped in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain the first frequency domain offset parameter set and the first pre-selected frequency domain offset. The method for the first terminal device to obtain the first frequency domain offset parameter set and the first pre-selected frequency domain offset is described above, and is not described here again.

Optionally, when the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol needs to be mapped with the reference signal, when N is 1, only M is 1, and therefore, when N is 1, the first terminal device may not acquire the first frequency domain offset parameter set, and may not acquire the first preselected frequency domain offset.

Correspondingly, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information, the first set of frequency domain offset parameters, and the first pre-selected frequency domain offset.

When a reference signal is mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by the second terminal device, the reference signal and/or data on the first time-frequency resource according to the first frequency domain mapping pattern information may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, the first frequency-domain offset parameter set and the first pre-selected frequency-domain offset.

It can be understood that, in the fifth form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A sixth form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a first pre-selected frequency domain offset when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol.

In this form, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first frequency domain offset parameter set, and when the data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the second frequency domain offset of the RE used for mapping the data in the mapping group. Therefore, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain the first set of frequency domain offset parameters. When data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain a second frequency domain offset of the REs used for mapping the data in the mapping group. For the method for the first terminal device to further obtain the first frequency domain offset parameter set and the second frequency domain offset, the above explanation is referred to, and details are not repeated here. For the case that the first frequency domain offset parameter set may not be acquired and the second frequency domain offset for mapping the REs of the data in the mapping group may not be acquired, refer to the description in the foregoing manner, and will not be described herein again.

Accordingly, in this form, when the reference signal and/or the data need to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, the reference signal and/or the data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps the reference signal and/or data in the frequency domain resource of at least one OFDM symbol in the first time-frequency resource according to the first frequency domain mapping pattern information, the first frequency domain offset parameter set and the second frequency domain offset.

When a reference signal and data are mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by the second terminal device, the reference signal and/or data on the first time frequency resource according to the first frequency domain mapping pattern information may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, the first frequency-domain offset parameter set and the second frequency-domain offset.

It can be understood that, in the sixth form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A seventh form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a first frequency domain offset parameter set when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol.

In this form, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first pre-selected frequency domain offset, and when the data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the second frequency domain offset used for mapping the REs of the data in the mapping group. Therefore, when the reference signal needs to be mapped in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain a first pre-selected frequency domain offset; when data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain a second frequency domain offset used for mapping REs of the data. The method for the first terminal device to obtain the first pre-selected frequency domain offset and the second frequency domain offset used for mapping the RE of the data in the mapping group is described above, and is not described here again. For the case that the first pre-selected frequency domain offset may not be acquired and the second frequency domain offset for mapping the REs of the data in the mapping group may not be acquired, refer to the explanation in the foregoing manner, and will not be described herein again.

Correspondingly, when the reference signal and/or the data need to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, the reference signal and/or the data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information, the first pre-selected frequency domain offset and the second frequency domain offset.

When a reference signal and data are mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by the second terminal device, the reference signal and/or data on the first time frequency resource according to the first frequency domain mapping pattern information may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, the first pre-selected frequency-domain offset and the second frequency-domain offset.

It can be understood that, in the seventh form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

An eighth form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a first frequency domain offset used for mapping REs of the reference signal in the mapping group when the reference signal needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, and the first frequency domain mapping pattern information may further include a second frequency domain offset used for mapping REs of the data in the mapping group when the data needs to be mapped in frequency domain resources in the first frequency domain range corresponding to one OFDM symbol.

In particular, reference is made to the explanations in the previous embodiment for the first reference signal mapping pattern information, the first data mapping pattern information and the second frequency domain offset.

For a first frequency domain offset: the M REs for mapping the reference signal in one mapping group each correspond to one first frequency-domain offset, that is, the first frequency-domain mapping pattern information includes the first frequency-domain offsets of the M REs for mapping the reference signal in the mapping group, that is, the number of the first frequency-domain offsets is the same as the number M of the REs for mapping the reference signal in one mapping group. In a case where the first RE or the last RE in the mapping group is the reference RE, for any one of the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE. In one approach, if the first RE is the same as the reference RE, the first frequency domain offset of the first RE is 0, and if the first RE reference RE is different, the first frequency domain offset of the first RE is the number of REs spaced between the first RE and the reference RE plus 1. It can be understood that the first frequency domain offset ranges from 0 to N-1, including 0 and N-1, and the first frequency domain offset is different from the second frequency domain offset.

The meaning of the reference RE is the same as that of the aforementioned reference RE, the meaning of the first RE in one mapping group is the same as that of the first RE in the aforementioned one mapping group, and the meaning of the last RE in one mapping group is the same as that of the last RE in the aforementioned one mapping group.

Illustratively, with continued reference to fig. 4, if the number of first frequency domain offsets is 2: 0 and 1, there are 2 REs in the mapping group 41 for mapping the reference signal, if the reference RE is RE411, the first frequency domain offset of RE411 is 0, and the first frequency domain offset of RE412 is 1, that is, RE411 and RE412 are 2 REs for mapping the reference signal.

As described above, the first reference signal mapping pattern information and the first frequency domain offset are described, it can be known that when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the number N of REs included in the mapping group and the first frequency domain offset jointly determine REs used for mapping the reference signal in the mapping group, and the number N of REs included in the mapping group can be obtained through the first reference signal mapping pattern information or the first data mapping pattern information. Therefore, the first terminal device and the second terminal device may determine, according to the number N of REs included in the mapping group and the first frequency domain offset, REs used for mapping the reference signal in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, which may specifically be determined by the following formula three:

K_R2＝N*n+Δ_R2a formula III;

wherein, K_R2For the index or number, delta, of RE mapped with reference signal in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol _R2Is the first frequency domain offset, n is a natural number, and n sequentially takes 0, 1 and 2 … …. It can be understood that after the value of n is determined, the values of n are updated after all the first frequency domain offsets are calculated by the formula three.

After obtaining the first frequency domain mapping pattern information, the second terminal device maps a reference signal in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol, and the second terminal device may determine, according to the first reference signal mapping pattern information or the first data mapping pattern included in the first frequency domain mapping pattern information, the number N of REs included in the mapping group, and determine, according to the number N of REs included in the mapping group and the first frequency domain offset, REs mapped with the reference signal in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol; alternatively, the second terminal device may determine the number N of REs included in the mapping group according to the first reference signal mapping pattern information or the first data mapping pattern included in the first frequency-domain mapping pattern information, and determine, according to the number N of REs included in the mapping group, REs mapped with reference signals in frequency-domain resources in the first frequency-domain range corresponding to one OFDM symbol (for example, in the case where N is 1).

It can be understood that, in the eighth form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A ninth form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a first frequency domain offset used for mapping REs of the reference signal in the mapping group, when the reference signal needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol.

In this form, when data needs to be mapped in frequency domain resources within a first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the second frequency domain offset for mapping REs of data in the mapping group. Therefore, when data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain the second frequency domain offset. The method for the first terminal device to obtain the second frequency domain offset refers to the above explanation, and is not described herein again. For the case that the second frequency domain offset may not be obtained, refer to the explanation in the foregoing manner, and will not be described herein again.

Accordingly, when the first data mapping pattern information includes a first density and the first density is not 0, the first terminal device mapping the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information may include: the first terminal device maps the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the second frequency domain offset.

It can be understood that, in the ninth form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

Tenth form of the first frequency-domain mapping pattern information: the first frequency domain mapping pattern information may further include a second frequency domain offset for mapping REs of data in the mapping group, when the data needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol.

In this form, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first frequency domain offsets of the M REs used for mapping the reference signal in the mapping group, and therefore, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain the first frequency domain offsets of the M REs used for mapping the reference signal in the mapping group.

The first terminal device may obtain the first frequency domain offset of each of the M REs for mapping the reference signal in the mapping group, which is implemented by the following, but is not limited to, the following two embodiments.

In a first embodiment, when a reference signal needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, and N is 1, a first terminal device obtains 0 as a first frequency domain offset. At this time, the second terminal device may receive the first frequency domain offset for mapping the REs of the reference signal in the mapping group from the first terminal device.

In a second embodiment, the first terminal device determines, according to the current data transmission characteristic and a fifth preset rule, first frequency domain offsets of M REs used for mapping the reference signal in the mapping group, where the fifth preset rule is that the first frequency domain offsets of the M REs are all between 0 and N-1. In one mode, the first terminal device determines N and M according to the current data transmission characteristics, and the first terminal device determines M first frequency domain offsets between 0 and N-1. At this time, the second terminal device may receive the first frequency domain offset for mapping the REs of the reference signal in the mapping group from the first terminal device.

In a third embodiment, the first terminal device receives, from the network device, the first frequency domain offsets of the M REs used for mapping the reference signal in the mapping group, and the method for the network device to obtain the first frequency domain offsets of the M REs is the same as the method for the first terminal device to obtain the first frequency domain offsets of the M REs used for mapping the reference signal in the mapping group in the first embodiment or the second embodiment. At this time, the second terminal device may receive the first frequency domain offset for mapping the REs of the reference signal in the mapping group from the first terminal device or the network device.

It can be understood that when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol and N is 1, there is only a possibility that M is 1, and the first frequency domain offset can also be only 0, so that when N is 1, the first frequency domain offset 0 may be predetermined. In this case, of course, both the second terminal device and the first terminal device may obtain the predetermined first frequency domain offset 0.

Optionally, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol and N is 1, there is only a possibility that M is 1, and therefore, when N is 1, the first terminal device may not acquire the first frequency domain offset.

Correspondingly, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the mapping, by the first terminal device, the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information may include: the first terminal device maps the reference signal and/or data in the frequency domain resource of at least one OFDM symbol in the first time-frequency resource according to the first frequency domain mapping pattern information and the first frequency domain offset of each of the M REs for mapping the reference signal in the mapping group.

When a reference signal is mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol, the obtaining, by the second terminal device, the reference signal and/or data on the first time-frequency resource according to the first frequency domain mapping pattern information may include: and the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first frequency-domain offset of each of the M REs used for mapping the reference signal in the mapping group.

It can be understood that, in the tenth form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to one index or number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to one index or number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern information when transmitting the first frequency domain mapping pattern information to the second terminal device.

An eleventh form: the first frequency-domain mapping pattern information includes first reference signal mapping pattern information and first data mapping pattern information.

Specifically, in this form, when the reference signal needs to be mapped in the frequency domain resources within the first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include the first set of frequency domain offset parameters, the first pre-selected frequency domain offset, and the first frequency domain offset of each of the M REs in the mapping group used for mapping the reference signal. When data needs to be mapped in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, the first frequency domain mapping pattern information does not include second frequency domain offsets of each of the H REs used for mapping the data in the mapping group.

Therefore, when the reference signal needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain the first frequency domain offset parameter set and the first pre-selected frequency domain offset, or the first terminal device may further obtain the first frequency domain offsets of the M REs used for mapping the reference signal in the mapping group. The method for the first terminal device to obtain the first frequency domain offset parameter set and the first pre-selected frequency domain offset is described in the above, and is not described herein again. For the first frequency domain offset method for the first terminal device to obtain the respective M REs for mapping the reference signal in the mapping group, reference is made to the above description, and details are not repeated here. For the case that the first set of frequency domain offset parameters, the first pre-selected frequency domain offset and the first frequency domain offset may not be obtained, refer to the explanation in the foregoing manner, and are not described herein again.

When data needs to be mapped in the frequency domain resources in the first frequency domain range corresponding to one OFDM symbol, the first terminal device may further obtain a second frequency domain offset of the REs used for mapping the data in the mapping group. The method for the first terminal device to obtain the second frequency domain offset is described in the above, and is not described herein again. For the case that the second frequency domain offset may not be obtained, refer to the explanation in the foregoing manner, and will not be described herein again.

Accordingly, mapping the reference signal in the frequency domain resource in the first frequency domain range corresponding to one OFDM symbol and mapping the reference signal and/or data in the frequency domain resource of at least one OFDM symbol in the first time frequency resource by the first terminal device according to the first frequency domain mapping pattern information may include: the first terminal device maps the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information, the first frequency domain offset parameter set, the first pre-selected frequency domain offset and the second frequency domain offset; or, the first terminal device maps the reference signal and/or the data in the frequency domain resource of at least one OFDM symbol in the first time-frequency resource according to the first frequency-domain mapping pattern information, the first frequency-domain offset for mapping the REs of the reference signal in the mapping group, and the second frequency-domain offset for mapping the REs of the data in the mapping group.

When a reference signal is mapped in a frequency domain resource in a first frequency domain range corresponding to one OFDM symbol and the first data mapping pattern information includes a first density and the first density is not 0, the second terminal device obtains the reference signal and/or data mapped in the frequency domain resource of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information, which may include: the second terminal equipment acquires the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, the first frequency-domain offset parameter set, the first pre-selected frequency-domain offset and the second frequency-domain offset of the RE used for mapping the data in the mapping group; or, the second terminal device obtains the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, the first frequency-domain offset of the RE used for mapping the reference signal in the mapping group, and the second frequency-domain offset of the RE used for mapping the data in the mapping group.

It can be understood that, in the eleventh form of the first frequency domain mapping pattern information, multiple kinds of frequency domain mapping pattern information may be stored in the network device, the first terminal device, and the second terminal device, where each kind of frequency domain mapping pattern information corresponds to an index or a number, that is, each item of information included in the frequency domain mapping pattern information in this form corresponds to an index or a number; at this time, the network device or the first terminal device may transmit the index or the number of the first frequency domain mapping pattern when transmitting the first frequency domain mapping pattern information to the second terminal device.

A plurality of frequency domain mapping patterns may be stored in the network device, the first terminal device, and the second terminal device, and information of a part of the frequency domain mapping patterns in the plurality of frequency domain mapping patterns may be as shown in table 2.

TABLE 2

Several possible implementations of the first frequency domain mapping pattern information are described in detail above.

Next, several specific embodiments are used to describe the actions performed by the second terminal device after the second terminal device receives the first frequency domain mapping pattern information when the reference signal is the AGC reference signal and one OFDM symbol in the above embodiments is the AGC symbol.

Fig. 9 is a first flowchart of a communication method provided in an embodiment of the present application, and referring to fig. 9, the method of the present embodiment includes:

step S201, determining, according to the first frequency domain mapping pattern information, a first total number of REs mapped with AGC reference signals and a second total number of REs mapped with data in frequency domain resources in a first frequency domain range corresponding to the AGC symbol.

First, the acquisition process of the first total number is explained:

when the first reference signal mapping pattern information includes information indicating that there are no REs for mapping reference signals in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol, the second terminal device determines, according to the first reference signal mapping pattern information, that a first total number of REs mapped with the AGC reference signals in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol is 0.

When the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources within a first frequency domain range to which AGC symbols correspond: in one mode, the second terminal device determines, according to a first density included in the first data mapping pattern information and the number of parameters included in the first frequency-domain offset parameter set, a first total number of REs mapped with the AGC reference signal in frequency-domain resources within a first frequency-domain range corresponding to the AGC symbol. For example, the first density is 3/6, which indicates that the number N of REs included in one mapping group is 6, the number of parameters included in the first frequency-domain offset parameter set is 3, and indicates that the number M of REs mapped with reference signals by one mapping group is 3, then the first total number of REs mapped with AGC reference signals in the frequency-domain resources in the first frequency-domain range corresponding to the AGC symbol is half of the total number of REs scheduled in the frequency-domain resources of the AGC symbol by the current data transmission. In another mode, the second terminal device determines, according to the first density included in the first data mapping pattern information and the number of first frequency domain offsets, used for mapping REs of the reference signal, in the mapping group, a first total number of REs, to which the AGC reference signal is mapped, in frequency domain resources in a first frequency domain range corresponding to the AGC symbol.

When the first reference signal mapping pattern information includes information indicating that the N REs are one mapping group: in one embodiment, when N is 1, only M is 1, and when N is 2, only M is 1, so that when N is 1 and N is 2, the second terminal device can determine the first total number of REs mapped with the AGC reference signal in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol according to the first reference signal mapping pattern information. Specifically, when N is equal to 1, a first total number of REs mapped with an AGC reference signal in frequency domain resources in a first frequency domain range corresponding to an AGC symbol is equal to a total number of REs scheduled in the frequency domain resources of the AGC symbol by a current data transmission. When N is 2, a first total number of REs mapped with the AGC reference signal in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol is equal to half of a total number of REs scheduled in the frequency domain resources of the AGC symbol by the current data transmission. In another mode, when N is greater than or equal to 3, the second terminal device determines, according to the first reference signal mapping pattern information and the number of parameters included in the first frequency domain offset parameter set, a first total number of REs to which AGC reference signals are mapped in frequency domain resources in a first frequency domain range corresponding to the AGC symbol. In still another mode, when N ≧ 3, the second terminal device determines, according to the first reference signal mapping pattern information and the number of first frequency domain offsets used for mapping REs of reference signals in the mapping group, a first total number of REs, to which AGC reference signals are mapped, in frequency domain resources within a first frequency domain range corresponding to the AGC symbol. For example, if the first reference signal mapping pattern information indicates that N is equal to 4, that is, the number of REs included in one mapping group is 4, and there are 2 first frequency domain offsets, it indicates that the number of REs used for mapping the reference signal in each mapping group is 2, and the second terminal device determines that the first total number is equal to half of the total number of REs scheduled in the frequency domain resource of the AGC symbol for the current data transmission.

When the first reference signal mapping pattern information includes information indicating that there are M REs out of the N REs for mapping the reference signal: and the second terminal equipment determines the first total number of the REs mapped with the AGC reference signal in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol according to the first reference signal mapping pattern information.

Next, the acquisition process of the second total number is explained:

when the first data mapping pattern information includes first density or second indication information of REs used for mapping data in the mapping group, the second terminal device determines, according to the first data mapping pattern information, a second total number of REs with data mapped in frequency domain resources within the first frequency domain range on the AGC symbol. Wherein the second total is equal to the total number of REs scheduled in the frequency domain resources of the AGC symbol by the current data transmission multiplied by the first density when the first density is not 0. The second total number is 0 when the first density is 0 or the first data mapping pattern information includes the second indication information.

When the first data mapping pattern information includes the first indication information, the second terminal device determines a second total number according to the total number of REs scheduled in the frequency domain resource of the AGC symbol by the current data transmission and the first total number. Specifically, the second total is equal to the total number of REs scheduled in the frequency domain resources of the AGC symbol by the current data transmission minus the first total.

And step S202, performing AGC according to the first total number and the second total number.

Specifically, the second terminal device performs AGC based on the sum of the first total and the second total. The specific AGC process is not described in this embodiment.

The embodiment provides a method for performing AGC by a second terminal device according to first frequency domain mapping pattern information.

Fig. 10 is a second flowchart of a communication method provided in the embodiment of the present application, and referring to fig. 10, the method of the present embodiment includes:

step S301, determining a first time period in an AGC symbol period according to the first frequency domain mapping pattern information, the time length required for AGC by the second terminal device, and the current SCS, where the AGC symbol period lasts for a period of one AGC symbol length.

Specifically, the first terminal device converts a signal on the AGC symbol into an h-segment repetition signal occupying 1 AGC symbol period according to a first reference signal mapping pattern and/or first data mapping pattern information in the first frequency domain mapping pattern information, where h is a natural number greater than or equal to 1, and sends the h-segment repetition signal to the second terminal device within the AGC symbol period.

Similarly, the second terminal device obtains h according to the first reference signal mapping pattern information and/or the first data mapping pattern information in the first frequency domain mapping pattern information. Then, the second terminal device divides the length of the AGC symbol without the CP into h parts, and each part is the duration of a preselected time period; then the second terminal equipment determines the number J of the pre-selection time periods occupied by the second terminal equipment for AGC according to the time length of AGC of the second terminal equipment,

And H is the time length of AGC of the second terminal equipment. And if h is larger than J, the second terminal equipment determines the remaining h-J preselected time periods as the first time period.

Exemplarily, if one mapping group includes 4 REs, 1 RE is mapped with a reference signal, and 1 RE is mapped with data, that is, the first reference signal mapping pattern information is N-4, the first data mapping pattern information is 1/4, and the first frequency-domain offset parameter set includes one parameter or has one first frequency-domain offset. At this time, the first terminal device converts the signal on the AGC symbol into a 4-segment (i.e., h-4) repeated signal occupying 1 AGC symbol period, and transmits the 4-segment repeated signal to the second terminal device within the AGC symbol period.

When the SCS is 30kHz and the CP is normal CP, the length of the AGC symbol without CP is 33.33us, and the duration of the preselection period is 33.33 us/4-8.33 us. If the time length of AGC of the second terminal device a is 15us, then

That is, the second terminal device a occupies 2 preselected time periods for AGC, and the remaining 2 preselected time periods are the first time periods corresponding to the second terminal device a. If the time length of AGC of the second terminal device b is 20us, then

That is, the second terminal device b occupies 3 pre-selection time periods and CP lengths for AGC, and the remaining 1 pre-selection time period is the first time period corresponding to the second terminal device b

Step S302 is executed when the reference signal is mapped in the frequency domain resource in the first frequency domain range corresponding to the AGC symbol:

step S302, receiving a reference signal from an RE mapped with the reference signal in the frequency domain resource in the first frequency domain range corresponding to the AGC symbol in the first time period, so as to perform time-frequency synchronization and channel estimation.

Specifically, if there is a first time period and a reference signal is mapped in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol, the second terminal device may determine, according to the first reference signal mapping pattern information, or according to the first reference signal mapping pattern information, the first set of frequency domain offset parameters, and the first pre-selected frequency domain offset, or according to the first reference signal mapping pattern information and the first frequency domain offset used for mapping the REs of the reference signal in the mapping set, the REs of the reference signal mapped in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol.

After determining the REs mapped with the reference signals in the frequency domain resources in the first frequency domain range corresponding to the AGC symbols, the second terminal device receives the reference signals from the REs mapped with the reference signals in the frequency domain resources in the first frequency domain range corresponding to the AGC symbols for the first time period, so as to perform time-frequency synchronization and channel estimation. This may increase the accuracy of the time-frequency synchronization and channel estimation by the second terminal device.

As an example in step S301, the second terminal device a may receive the reference signal from the REs to which the reference signal is mapped for the remaining 2 pre-selected time periods. The second terminal device b may receive the reference signal from the REs mapped with the reference signal for the remaining 1 pre-selected period.

If data is mapped in the frequency domain resource in the first frequency domain range corresponding to the AGC symbol, step S303 is performed:

step S303, receiving data from the RE mapped with data in the frequency domain resource in the first frequency domain range corresponding to the AGC symbol in the first time period, so as to demodulate and decode the received data.

Specifically, if there is a first time period and data is mapped in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol, the second terminal device may determine, according to the first data mapping pattern information and the second frequency domain offset, or according to the first data mapping pattern information, REs mapped with data in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol.

Under the condition that the first data mapping pattern information includes the first indication information, the second terminal device determines, according to the first data mapping pattern information, REs mapped with data in frequency domain resources in a first frequency domain range corresponding to the AGC symbol, including: and the second terminal equipment determines the RE mapped with the data in the frequency domain resource in the first frequency domain range corresponding to the AGC symbol according to the RE mapped with the reference signal in the frequency domain resource in the first frequency domain range corresponding to the AGC symbol and the first indication information.

When the first frequency domain mapping pattern information does not include the second frequency domain offset and the first terminal device or the network device obtains the second frequency domain offset, the second terminal device receives the second frequency domain offset from the first terminal device or the network device in addition to the first frequency domain mapping pattern information.

After determining the REs to which the data is mapped in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol, the second terminal device receives the data from the REs to which the data is mapped in the frequency domain resources in the first frequency domain range corresponding to the AGC symbol in the first time period, and demodulates and decodes the received data.

As an example in step S301, the second terminal device a may receive data from the mapped data RE for the remaining 2 pre-selected time periods. The second terminal device b may receive data from the data RE mapped thereto for the remaining 1 pre-selected period.

The embodiment provides a specific implementation that, if the length of the current AGC symbol is longer and is much longer than the duration of performing AGC by the second terminal device, and the first terminal device or the network device determines the first frequency domain mapping pattern information matched with the current type of time domain resource, not only AGC can be performed on the AGC symbol, but also time-frequency synchronization and channel estimation and/or receiving and demodulating data on the decoded AGC symbol can be performed according to the AGC reference signal, that is, the utilization rate of the AGC symbol is improved.

It is to be understood that, in the foregoing embodiments, the operations and steps implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) applicable to the terminal device, and the embodiments of the present application are not limited thereto. The operations and steps implemented by the network device may also be implemented by a component (e.g., a chip or a circuit) applicable to the network device, which is not limited in this application.

The communication method according to the embodiment of the present application is explained above, and the communication apparatus according to the present application is explained below using a specific embodiment.

Fig. 11 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application, where the communication apparatus may be a first terminal device, may also be a component of the first terminal device, or may be another communication module. Referring to fig. 11, the communication apparatus of the present embodiment includes: a receiving module 111, a processing module 112 and a transmitting module 113;

a receiving module 111 or a processing module 112, configured to obtain first frequency-domain mapping pattern information, where the first frequency-domain mapping pattern information includes first reference signal mapping pattern information and first data mapping pattern information, where the first reference signal mapping pattern information is used to indicate a pattern of mapping a reference signal in frequency-domain resources of one OFDM symbol, and the first data mapping pattern information is used to indicate a pattern of mapping data in frequency-domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information;

The processing module 112 is further configured to map, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources;

a sending module 113, configured to send the reference signal and/or the data to a second terminal device on the first time-frequency resource.

Optionally, as an embodiment, the receiving module 111 is configured to obtain the first frequency domain mapping pattern information, and includes: the receiving module 111 is specifically configured to receive the first frequency domain mapping pattern information from a network device.

Optionally, as an embodiment, the processing module 112 is configured to obtain first frequency domain mapping pattern information, and includes: the processing module 112 is specifically configured to determine the first reference signal mapping pattern information from the at least two reference signal mapping pattern information, where the at least two reference signal mapping pattern information are predefined or configured by a higher layer signaling; and determining first data mapping pattern information from the at least two data mapping pattern information, the at least two data mapping pattern information being either predefined or configured by higher layer signaling.

Optionally, as an embodiment, the sending module 113 is further configured to send the first frequency domain mapping pattern information to the second terminal device.

Optionally, as an embodiment, the reference signal is an automatic gain control, AGC, reference signal, or the reference signal is a demodulation reference signal, DMRS.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are a mapping group, where the N REs in the mapping group include M REs for mapping reference signals, M is not greater than N, N is a positive integer, and M is an integer;

the first reference signal mapping pattern information includes information indicating consecutive N REs as one mapping group; or,

the first reference signal mapping pattern information includes information indicating that there are no REs for mapping reference signals in frequency domain resources of one OFDM symbol; or,

the first reference signal mapping pattern information includes information indicating that there are REs for mapping reference signals in frequency domain resources of one OFDM symbol; or,

the first reference signal mapping pattern information includes information indicating that there are M REs for mapping reference signals among consecutive N REs.

Optionally, as an embodiment, N is any one of the following: 1. 2, 3, 4, 6, 12; the M is any one of the following: 0. 1, 2, 3, 4 and 6.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer;

the first frequency-domain mapping pattern information comprises a first pre-selected frequency-domain offset; wherein the first RE or the last RE in the mapping group is a reference RE, the RE with the least RE spaced from the reference RE among the M REs for mapping the reference signal in the mapping group is an initial RE, the first pre-selected frequency domain offset is a frequency domain offset between the initial RE and the reference RE, M is a positive integer, and M is less than or equal to N.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first pre-selected frequency-domain offset, the first pre-selected frequency-domain offset is a frequency-domain offset between starting REs and reference REs, a first RE or a last RE in the mapping group is the reference RE, a RE with the least REs among M REs used for mapping a reference signal and the reference RE in the mapping group is the starting RE, M is a positive integer, and M is not more than N;

The processing module 112 or the receiving module 111 is further configured to obtain the first pre-selected frequency domain offset;

the processing module 112, configured to map the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information, includes: the processing module 112 is specifically configured to map reference signals and/or data in frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information and the first pre-selected frequency-domain offset.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters;

the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping a reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter in the first frequency-domain offset parameter set corresponding to the first RE, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset between the reference REs of the first RE, M is a positive integer, and M is less than or equal to N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first frequency-domain offset parameter set, a sum of a first parameter and a first pre-selected frequency-domain offset included in the first frequency-domain offset parameter set is a first frequency-domain offset of a first RE of M REs for mapping a reference signal in the mapping group, the first RE is any one of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset of the first RE with respect to the reference RE, M is an integer, and M is not greater than N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs;

the processing module 112 or the receiving module 111 is further configured to obtain the first set of frequency domain offset parameters;

the processing module 112, configured to map the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information, includes: the processing module 112 is specifically configured to map, according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set, the reference signal and/or data in the frequency-domain resource of at least one OFDM symbol in the first time-frequency resource.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises first frequency-domain offsets of respective M REs used by the mapping set for mapping the reference signal; wherein, the first RE or the last RE in the mapping group is a reference RE, and for a first RE of the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE, where M is a positive integer and M is less than or equal to N.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include respective first frequency-domain offsets of M REs used for mapping a reference signal in the mapping group, a first RE or a last RE in the mapping group is a reference RE, for any first RE of the M REs, the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE, the M is a positive integer, and M is not greater than N;

the processing module 112 or the receiving module 111 is further configured to obtain respective first frequency domain offsets of M REs used for mapping the reference signal in the mapping group;

The processing module 112, configured to map the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information, includes: the processing module 112 is specifically configured to map the reference signal and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information and the first frequency-domain offset of each of the M REs in the mapping group used for mapping the reference signal.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first data mapping pattern information includes: a first density of REs in the mapping set used to map the data; wherein the first density is a ratio of the number H of REs used for mapping data in the mapping group to the N, the H is an integer, and H is less than or equal to N; or,

first indication information, where the first indication information indicates that, in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol, REs other than REs to which the reference signal is mapped are REs used for mapping the data; or,

And second indication information, where the second indication information indicates that no RE for mapping the data exists in frequency domain resources in a first frequency domain range corresponding to one OFDM symbol.

Optionally, as an embodiment, the first density is one of:

0、1/2、2/3、1/3、3/4、2/4、1/4、5/6、4/6、3/6、2/6、1/6、1/12、2/12、3/12、4/12、5/12、6/12、7/12、8/12、9/12、10/12、11/12。

optionally, as an embodiment, the first frequency-domain mapping pattern information includes second frequency-domain offsets of H REs in the mapping group for mapping the data, where H is an integer and H is less than or equal to N; wherein the first RE or the last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency domain offset of the second RE is a frequency domain offset between the second RE and the reference RE.

Optionally, as an embodiment, the first frequency-domain mapping pattern information does not include second frequency-domain offsets of the H REs used for mapping the data in the mapping group, where a first RE or a last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency-domain offset of the second RE is a frequency-domain offset between the second RE and the reference RE, where H is an integer, and H ≦ N;

the processing module 112 or the receiving module 111 is further configured to obtain second frequency domain offsets of the H REs in the mapping group, which are used for mapping the data;

The processing module 112, configured to map the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information, includes: the processing module 112 is specifically configured to map the reference signal and/or the data in the frequency domain resource of at least one OFDM symbol in the first time-frequency resource according to the first frequency-domain mapping pattern information and the second frequency-domain offset of each of the H REs in the mapping group used for mapping the data.

The communication device in the present embodiment may be a terminal, or may be a chip applied to the terminal, or other combined device or component having the terminal function. The receiving module may be a receiver when the communication device is a terminal, may include an antenna, a radio frequency circuit, and the like, and the processing module may be one or more processors, such as: a Central Processing Unit (CPU), the sending module may be a transmitter, may include an antenna and a radio frequency circuit, etc., wherein the receiver and the transmitter may be an integrated transceiver. When the communication device is a component having the above terminal function, the receiving module may be a radio frequency unit, the processing module may be a processor, and the transmitting module may be a radio frequency unit. When the communication device is a system-on-chip, the receiving module may be an input interface of the system-on-chip, the processing module may be a processor of the system-on-chip, and the transmitting module may be an output interface of the system-on-chip.

The communication apparatus of this embodiment may be configured to execute the technical solution corresponding to the first terminal device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 12 is a schematic structural diagram of a communication apparatus according to yet another embodiment of the present application, where the communication apparatus may be a second terminal device, may also be a component of the second terminal device, or may be another communication module. Referring to fig. 12, the communication apparatus of the present embodiment includes: a receiving module 121 and a processing module 122;

a receiving module 121, configured to receive first frequency-domain mapping pattern information from a first terminal device or a network device, where the first frequency-domain mapping pattern information includes first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used to indicate a pattern for mapping reference signals in frequency-domain resources of one orthogonal frequency division multiplexing, OFDM, symbol, and the first data mapping pattern information is used to indicate a pattern for mapping data in frequency-domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for the first terminal equipment to map reference signals and/or data in frequency domain resources of at least one OFDM symbol in first time-frequency resources;

A processing module 122, configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain pattern information.

The receiving module 121 or the processing module 122 is further configured to obtain the first pre-selected frequency domain offset; the processing module 122, configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain pattern information, includes: the processing module 122 is specifically configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first pre-selected frequency-domain offset.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters; the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping a reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter in the first frequency-domain offset parameter set corresponding to the first RE, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset between the reference REs of the first RE, M is a positive integer, and M is less than or equal to N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs.

the receiving module 121 or the processing module 122 is further configured to obtain the first set of frequency domain offset parameters; the processing module 122, configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, includes: the processing module 122 is specifically configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set.

the receiving module 121 or the processing module 122 is further configured to obtain respective first frequency domain offsets of M REs used for mapping the reference signal in the mapping group; the processing module 122, configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, includes: the processing module 122 is specifically configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and the first frequency-domain offset of each of the M REs used for mapping the reference signal in the mapping group.

Optionally, as an embodiment, the first density is one of:

the receiving module 121 or the processing module 122 is further configured to obtain second frequency domain offsets of the H REs in the mapping group, which are used for mapping the data; the processing module 122, configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information, includes: the processing module 122 is specifically configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain mapping pattern information and a second frequency-domain offset of each of the H REs in the mapping group used for mapping the data.

The communication device in the present embodiment may be a terminal, or may be a chip applied to the terminal, or other combined device or component having the terminal function. The receiving module may be a receiver when the communication device is a terminal, may include an antenna, a radio frequency circuit, and the like, and the processing module may be one or more processors, such as: a Central Processing Unit (CPU). When the communication device is a component having the above terminal function, the receiving module may be a radio frequency unit, and the processing module may be a processor. When the communication device is a system-on-chip, the receiving module may be an input interface of the system-on-chip and the processing module may be a processor of the system-on-chip.

The communication apparatus of this embodiment may be configured to execute the technical solution corresponding to the second terminal device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 13 is a schematic structural diagram of a communication apparatus according to yet another embodiment of the present application, where the communication apparatus may be a network device, a component of the network device, or another communication module. Referring to fig. 13, the communication apparatus of the present embodiment includes: a sending module 131 and a processing module 132;

a processing module 132, configured to obtain first frequency domain mapping pattern information, where the first frequency domain mapping pattern includes first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used to indicate a pattern of mapping a reference signal in frequency domain resources of one OFDM symbol, and the first data mapping pattern information is used to indicate a pattern of mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for a first terminal device to map a reference signal and/or data in a frequency domain resource of at least one OFDM symbol in a first time-frequency resource, wherein the first time-frequency resource is used for the first terminal device to send the reference signal and/or the data to a second terminal device;

A processing module 132, configured to send the first frequency domain mapping pattern information to the first terminal device and/or the second terminal device.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first pre-selected frequency-domain offset, the first pre-selected frequency-domain offset is a frequency-domain offset between starting REs and reference REs, a first RE or a last RE in the mapping group is the reference RE, a RE with the least REs among M REs used for mapping a reference signal and the reference RE in the mapping group is the starting RE, M is a positive integer, and M is not more than N; the processing module 132 is further configured to obtain the first pre-selected frequency domain offset.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include a first frequency-domain offset parameter set, a sum of a first parameter and a first pre-selected frequency-domain offset included in the first frequency-domain offset parameter set is a first frequency-domain offset of a first RE of M REs for mapping a reference signal in the mapping group, the first RE is any one of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset of the first RE with respect to the reference RE, M is an integer, and M is not greater than N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs; the processing module 132 is further configured to obtain the first set of frequency domain offset parameters.

Optionally, as an embodiment, every N consecutive resource elements REs in the frequency domain resource of one OFDM symbol are one mapping group, where N is a positive integer; the first frequency-domain mapping pattern information does not include respective first frequency-domain offsets of M REs used for mapping a reference signal in the mapping group, a first RE or a last RE in the mapping group is a reference RE, for any first RE of the M REs, the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE, the M is a positive integer, and M is not greater than N; the processing module 132 is further configured to obtain a first frequency domain offset of each of the M REs used for mapping the reference signal in the mapping group.

Optionally, as an embodiment, the first density is one of:

Optionally, as an embodiment, the first frequency-domain mapping pattern information does not include second frequency-domain offsets of the H REs used for mapping the data in the mapping group, where a first RE or a last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency-domain offset of the second RE is a frequency-domain offset between the second RE and the reference RE, where H is an integer, and H ≦ N; the processing module 132 is further configured to obtain second frequency domain offsets of the H REs in the mapping group, which are used for mapping the data.

The communication device in this embodiment may be a network device, or may be a chip applied to a network device, or other combined device or component having the functions of the network device. When the communication apparatus is a network device, the processing module may be one or more processors, such as: the transmitting module may be a transmitter, and may include an antenna, a radio frequency circuit, and the like. When the communication device is a component having the above-mentioned network device function, the processing module may be a processor, and the transmitting module may be a radio frequency unit. When the communication device is a system-on-chip, the processing module may be a processor of the system-on-chip, and the transmitting module may be an output interface of the system-on-chip.

The communication apparatus of this embodiment may be configured to execute the technical solutions corresponding to the network devices in the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.

It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. Each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. 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.

Fig. 14 is a schematic structural diagram of a communication device according to yet another embodiment of the present application. As shown in fig. 14, the communication apparatus 500 according to this embodiment may be the first terminal device (or a component that can be used for the first terminal device) or the second terminal device (or a component that can be used for the second terminal device) or the network device (or a component that can be used for the network device) mentioned in the foregoing method embodiments. The communication device may be configured to implement the method described in the above method embodiment, and refer to the description in the above method embodiment specifically.

The communication device 500 may comprise one or more processors 501, where the processors 501 may also be referred to as processing units and may implement certain control or processing functions. The processor 501 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor, or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control the communication device, execute software programs, and process data of the software programs.

In an alternative design, processor 501 may also have instructions 503 or data (e.g., intermediate data) stored therein. The instructions 503 may be executed by the processor, so that the communication apparatus 500 executes the method corresponding to the terminal device or the second terminal device described in the above method embodiment.

In yet another possible design, the communication device 500 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the communication device 500 may include one or more memories 502, on which instructions 504 may be stored, and the instructions may be executed on the processor, so that the communication device 500 performs the methods described in the above method embodiments.

Optionally, the memory may also store data. The processor and the memory may be provided separately or may be integrated together.

Optionally, the communication device 500 may further include a transceiver 505 and/or an antenna 506. The processor 501, which may be referred to as a processing unit, controls the communication device 500. The transceiver 505 may be referred to as a transceiver unit, a transceiver, a transceiving circuit, a transceiver, or the like, and is used for implementing transceiving functions of a communication device.

In one design, if the communication apparatus 500 is used to implement the operation corresponding to the first terminal device in the foregoing embodiments, for example, the transceiver 505 may execute step S103 in the embodiment shown in fig. 3, and the processor 501 may execute step S101 or step S102 in the embodiment shown in fig. 3; alternatively, step S101 and step S103 in the embodiment shown in fig. 3 may be performed by the transceiver 505, and step S102 in the embodiment shown in fig. 3 may be performed by the processor 501.

In another design, if the communication apparatus 500 is used to implement the operation corresponding to the second terminal device in the foregoing embodiments, for example, the transceiver 505 may receive the first frequency domain mapping pattern information from the second terminal device, and the processor 501 may perform step S104 in the embodiment shown in fig. 3, step S201 to step S202 in the embodiment shown in fig. 9, and step S301 to step S303 in the embodiment shown in fig. 10.

In another design, if the communication apparatus 500 is used to implement the operations corresponding to the network device in the foregoing embodiments, for example, the transceiver 505 may send the first frequency-domain mapping pattern information to the first terminal device and/or the second terminal device, and the processor 501 performs the obtaining of the first frequency-domain mapping pattern information.

For specific implementation processes of the transceiver 505 and the processor 501, reference may be made to the related descriptions of the embodiments, and details are not described herein.

The processor 501 and transceiver 505 described herein may be implemented on an Integrated Circuit (IC), an analog IC, a Radio Frequency Integrated Circuit (RFIC), a mixed signal IC, an Application Specific Integrated Circuit (ASIC), a Printed Circuit Board (PCB), an electronic device, or the like. The processor and transceiver may also be fabricated using various 1C process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), Bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

It should be understood that the Processor mentioned in the embodiments of the present Application may be a Central Processing Unit (CPU), and may also be other general purpose processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field Programmable Gate Arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) is integrated in the processor.

Although in the above description of the embodiment, the communication apparatus 500 is described by taking a terminal device or a network device as an example, the scope of the communication apparatus described in the present application is not limited to the above-described first terminal device or second terminal device, and the structure of the communication apparatus may not be limited by fig. 14. The communications apparatus 500 may be a stand-alone device or may be part of a larger device. For example, the device may be:

(1) a stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) a set of one or more ICs, which optionally may also include storage components for storing data and/or instructions;

(3) an ASIC, such as a modem (MSM);

(4) a module that may be embedded within other devices;

(5) receivers, terminal devices, cellular telephones, wireless devices, handsets, mobile units, network devices, and the like;

(6) others, and so forth.

Fig. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be applicable to the terminal devices described in the above embodiments of the present application. For convenience of explanation, fig. 15 shows only main components of the terminal device. As shown in fig. 15, the terminal apparatus 600 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal equipment, executing software programs and processing data of the software programs. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 15 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 15 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one example, the antenna and the control circuit with transceiving functions can be regarded as a transceiving module 601 of the terminal device 600, and the processor with processing functions can be regarded as a processing module 602 of the terminal device 600. As shown in fig. 15, the terminal device 600 includes a transceiver module 601 and a processing module 602. A transceiver module may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiver module 601 may be regarded as a receiving module, and a device for implementing a transmitting function in the transceiver module 601 may be regarded as a transmitting module, that is, the transceiver module 601 includes a receiving module and a transmitting module, the receiving module may also be referred to as a receiver, a receiving circuit, and the like, and the transmitting module may be referred to as a transmitter, a transmitting circuit, and the like.

The embodiment of the application also provides a readable storage medium, wherein the readable storage medium is stored with a computer program; when executed, the computer program implements the communication method corresponding to the first terminal device or the communication method corresponding to the second terminal device, or the communication method corresponding to the transmitting terminal device or the communication method corresponding to the receiving terminal device.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A communication method is applied to a first terminal device, and is characterized by comprising the following steps:

acquiring first frequency domain mapping pattern information, wherein the first frequency domain mapping pattern information comprises first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used for indicating a pattern of a reference signal in frequency domain resource mapping of one Orthogonal Frequency Division Multiplexing (OFDM) symbol, and the first data mapping pattern information is used for indicating a pattern of data mapping in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information;

mapping reference signals and/or data in frequency domain resources of at least one OFDM symbol in first time-frequency resources according to the first frequency domain mapping pattern information;

and transmitting the reference signal and/or the data to a second terminal device on the first time-frequency resource.

2. The method of claim 1, wherein the obtaining the first frequency-domain mapping pattern information comprises:

Receiving the first frequency-domain mapping pattern information from a network device.

3. The method of claim 1, wherein the obtaining the first frequency-domain mapping pattern information comprises:

determining the first reference signal mapping pattern information from the at least two reference signal mapping pattern information, the at least two reference signal mapping pattern information being either predefined or configured for higher layer signaling;

determining first data mapping pattern information from the at least two data mapping pattern information, the at least two data mapping pattern information being either predefined or configured for higher layer signaling.

4. The method according to any one of claims 1 to 3, further comprising:

and sending the first frequency domain mapping pattern information to the second terminal equipment.

5. A communication method is applied to a second terminal device, and is characterized by comprising the following steps:

receiving first frequency domain mapping pattern information from a first terminal device or a network device, the first frequency domain mapping pattern comprising first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information being used for indicating a pattern for mapping reference signals in frequency domain resources of one orthogonal frequency division multiplexing, OFDM, symbol, and the first data mapping pattern information being used for indicating a pattern for mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for the first terminal equipment to map reference signals and/or data in frequency domain resources of at least one OFDM symbol in first time-frequency resources;

And acquiring the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain pattern information.

6. A communication method applied to a network device is characterized by comprising the following steps:

acquiring first frequency domain mapping pattern information, wherein the first frequency domain mapping pattern information comprises first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used for indicating a pattern of mapping a reference signal in frequency domain resources of one Orthogonal Frequency Division Multiplexing (OFDM) symbol, and the first data mapping pattern information is used for indicating a pattern of mapping data in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for a first terminal device to map a reference signal and/or data in a frequency domain resource of at least one OFDM symbol in a first time-frequency resource, wherein the first time-frequency resource is used for the first terminal device to send the reference signal and/or the data to a second terminal device;

And sending the first frequency domain mapping pattern information to the first terminal equipment and/or the second terminal equipment.

7. The method according to any one of claims 1 to 6, wherein the reference signal is an Automatic Gain Control (AGC) reference signal or the reference signal is a demodulation reference signal (DMRS).

8. The method according to any of claims 1 to 7, wherein every N consecutive Resource Elements (REs) in the frequency domain resource of one OFDM symbol are a mapping group, the N REs of the mapping group comprise M REs for mapping reference signals, M ≦ N, N is a positive integer, and M is an integer;

9. The method of claim 8, wherein N is any one of: 1. 2, 3, 4, 6, 12; the M is any one of the following: 0. 1, 2, 3, 4 and 6.

10. The method according to any of claims 1-9, wherein every N consecutive resource elements RE in the frequency domain resources of one OFDM symbol are one mapping group, said N being a positive integer;

11. The method according to any one of claims 1 to 4 and 7 to 9, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol are one mapping group, and N is a positive integer; the first frequency-domain mapping pattern information does not include a first pre-selected frequency-domain offset, the first pre-selected frequency-domain offset is a frequency-domain offset between starting REs and reference REs, a first RE or a last RE in the mapping group is the reference RE, a RE with the least REs among M REs used for mapping a reference signal and the reference RE in the mapping group is the starting RE, M is a positive integer, and M is not more than N;

The method further comprises the following steps: acquiring the first preselected frequency domain bias;

the mapping, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources includes:

mapping reference signals and/or data in frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the first pre-selected frequency domain offset.

12. The method according to any of claims 1 to 11, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol are one mapping group, and N is a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters;

the first frequency-domain offset parameter set includes a sum of a first parameter and a first pre-selected frequency-domain offset, where the sum is a first frequency-domain offset of a first RE of M REs used for mapping a reference signal in the mapping group, the first RE is any RE of the M REs, the first parameter is a parameter in the first frequency-domain offset parameter set corresponding to the first RE, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset between the reference REs of the first RE, M is a positive integer, and M is less than or equal to N;

The REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs.

13. The method according to any one of claims 1 to 4 and 7 to 11, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol are one mapping group, and N is a positive integer; the first frequency-domain mapping pattern information does not include a first frequency-domain offset parameter set, a sum of a first parameter and a first pre-selected frequency-domain offset included in the first frequency-domain offset parameter set is a first frequency-domain offset of a first RE of M REs for mapping a reference signal in the mapping group, the first RE is any one of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset of the first RE with respect to the reference RE, M is an integer, and M is not greater than N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs;

The method further comprises the following steps: acquiring the first frequency domain offset parameter set;

mapping reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set.

14. The method according to any one of claims 1 to 9, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol are one mapping group, and N is a positive integer;

the first frequency-domain mapping pattern information comprises first frequency-domain offsets of respective M REs used by the mapping set for mapping the reference signal; wherein, the first RE or the last RE in the mapping group is a reference RE, and for any first RE in the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE, where M is a positive integer and is not greater than N.

15. The method according to any one of claims 1 to 4 and 7 to 9, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol are one mapping group, and N is a positive integer; the first frequency-domain mapping pattern information does not include respective first frequency-domain offsets of M REs used for mapping a reference signal in the mapping group, a first RE or a last RE in the mapping group is a reference RE, for any first RE of the M REs, the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE, the M is a positive integer, and M is not greater than N;

The method further comprises the following steps: acquiring respective first frequency domain offsets of M REs used for mapping the reference signal in the mapping group;

and mapping the reference signals and/or data in the frequency domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency domain mapping pattern information and the first frequency domain offset of each of the M REs used for mapping the reference signals in the mapping group.

16. The method according to any of claims 1 to 15, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol are one mapping group, and N is a positive integer; the first data mapping pattern information includes: a first density of REs in the mapping set used to map the data; wherein the first density is a ratio of the number H of REs used for mapping data in the mapping group to the N, the H is an integer, and H is less than or equal to N; or,

17. The method of claim 16, wherein the first density is one of: 0. 1/2, 2/3, 1/3, 3/4, 2/4, 1/4, 5/6, 4/6, 3/6, 2/6, 1/6, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12.

18. The method according to any of claims 1 to 17, wherein the first frequency-domain mapping pattern information includes a second frequency-domain offset for each of H REs in the mapping group used for mapping the data, wherein H is an integer, and H ≦ N;

wherein the first RE or the last RE in the mapping group is a reference RE, and for any second RE of the H REs, the second frequency domain offset of the second RE is a frequency domain offset between the second RE and the reference RE.

19. The method according to any of claims 1 to 4 and 7 to 17, wherein the first frequency-domain mapping pattern information does not include a second frequency-domain offset for each of the H REs in the mapping group used for mapping the data, a first RE or a last RE in the mapping group is a reference RE, and for any of the H REs, the second frequency-domain offset for the second RE is a frequency-domain offset between the second RE and the reference RE, H is an integer, and H ≦ N;

The method further comprises the following steps: acquiring second frequency domain offsets of the H REs used for mapping the data in the mapping group;

mapping reference signals and/or data in frequency-domain resources of at least one OFDM symbol in the first time-frequency resources according to the first frequency-domain mapping pattern information and second frequency-domain offsets of the H REs in the mapping group, which are used for mapping the data.

20. A communications apparatus, comprising:

a receiving module or a processing module, configured to obtain first frequency domain mapping pattern information, where the first frequency domain mapping pattern includes first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used to indicate a pattern in which a reference signal is mapped in frequency domain resources of one OFDM symbol, and the first data mapping pattern information is used to indicate a pattern in which data is mapped in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information;

The processing module is further configured to map, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources;

a sending module, configured to send the reference signal and/or the data to a second terminal device on the first time-frequency resource.

21. The communications apparatus of claim 20, wherein the means for receiving is configured to obtain first frequency domain mapping pattern information, and comprises:

the receiving module is specifically configured to receive the first frequency domain mapping pattern information from a network device.

22. The communications apparatus of claim 20, wherein the processing module is configured to obtain first frequency-domain mapping pattern information and comprises:

the processing module is specifically configured to determine the first reference signal mapping pattern information from the at least two types of reference signal mapping pattern information, where the at least two types of reference signal mapping pattern information are predefined or configured by a higher layer signaling; and the number of the first and second groups,

23. The apparatus according to any of claims 20 to 22, wherein the sending module is further configured to send the first frequency-domain mapping pattern information to the second terminal device.

24. A communications apparatus, comprising:

a receiving module, configured to receive first frequency-domain mapping pattern information from a first terminal device or a network device, where the first frequency-domain mapping pattern information includes first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used to indicate a pattern for mapping reference signals in frequency-domain resources of one orthogonal frequency division multiplexing, OFDM, symbol, and the first data mapping pattern information is used to indicate a pattern for mapping data in frequency-domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for the first terminal equipment to map reference signals and/or data in frequency domain resources of at least one OFDM symbol in first time-frequency resources;

A processing module, configured to obtain the reference signal and/or the data on the first time-frequency resource according to the first frequency-domain pattern information.

25. A communications apparatus, comprising:

a processing module, configured to obtain first frequency domain mapping pattern information, where the first frequency domain mapping pattern includes first reference signal mapping pattern information and first data mapping pattern information, the first reference signal mapping pattern information is used to indicate a pattern in which a reference signal is mapped in frequency domain resources of one OFDM symbol, and the first data mapping pattern information is used to indicate a pattern in which data is mapped in frequency domain resources of one OFDM symbol; the first reference signal mapping pattern information is one of at least two reference signal mapping pattern information, and the first data mapping pattern information is one of at least two data mapping pattern information; the first frequency domain mapping pattern information is used for a first terminal device to map a reference signal and/or data in a frequency domain resource of at least one OFDM symbol in a first time-frequency resource, wherein the first time-frequency resource is used for the first terminal device to send the reference signal and/or the data to a second terminal device;

A sending module, configured to send the first frequency domain mapping pattern information to the first terminal device and/or the second terminal device.

26. The communication apparatus according to any of claims 20 to 25, wherein the reference signal is an automatic gain control, AGC, reference signal or the reference signal is a demodulation reference signal, DMRS.

27. The communication apparatus according to any of claims 20 to 26, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is a mapping group, and the N REs of the mapping group include M REs for mapping reference signals, M ≦ N, N being a positive integer, and M being an integer;

28. The communications apparatus of claim 27, wherein N is any one of: 1. 2, 3, 4, 6, 12; the M is any one of the following: 0. 1, 2, 3, 4 and 6.

29. The communication device according to any of claims 20-28, wherein every N consecutive resource elements RE in the frequency domain resources of one OFDM symbol is one mapping group, said N being a positive integer;

30. The communication device according to any of claims 20 to 23 and 26 to 28, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is a mapping group, and N is a positive integer; the first frequency-domain mapping pattern information does not include a first pre-selected frequency-domain offset, the first pre-selected frequency-domain offset is a frequency-domain offset between starting REs and reference REs, a first RE or a last RE in the mapping group is the reference RE, a RE with the least REs among M REs used for mapping a reference signal and the reference RE in the mapping group is the starting RE, M is a positive integer, and M is not more than N;

The processing module or the receiving module is further configured to obtain the first pre-selected frequency domain offset;

the processing module is configured to map, according to the first frequency-domain mapping pattern information, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in first time-frequency resources, and includes:

the processing module is specifically configured to map, according to the first frequency-domain mapping pattern information and the first pre-selected frequency-domain offset, reference signals and/or data in frequency-domain resources of at least one OFDM symbol in the first time-frequency resources.

31. The communication device according to any of claims 20 to 30, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is one mapping group, said N being a positive integer; the first frequency-domain mapping pattern information comprises a first set of frequency-domain bias parameters;

32. The communication device according to any of claims 20 to 23 and 26 to 30, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is a mapping group, and N is a positive integer; the first frequency-domain mapping pattern information does not include a first frequency-domain offset parameter set, a sum of a first parameter and a first pre-selected frequency-domain offset included in the first frequency-domain offset parameter set is a first frequency-domain offset of a first RE of M REs for mapping a reference signal in the mapping group, the first RE is any one of the M REs, the first parameter is a parameter corresponding to the first RE in the first frequency-domain offset parameter set, a first RE or a last RE in the mapping group is a reference RE, the first frequency-domain offset of the first RE is a frequency-domain offset of the first RE with respect to the reference RE, M is an integer, and M is not greater than N; the REs of the mapping group for mapping the reference signals having the least REs spaced from the reference REs are starting REs, and the first pre-selected frequency-domain offset is a frequency-domain offset between the starting REs and the reference REs;

The processing module or the receiving module is further configured to obtain the first set of frequency domain bias parameters;

the processing module is specifically configured to map, according to the first frequency-domain mapping pattern information and the first frequency-domain offset parameter set, a reference signal and/or data in a frequency-domain resource of at least one OFDM symbol in a first time-frequency resource.

33. The communication device according to any of claims 20 to 28, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is one mapping group, said N being a positive integer;

the first frequency-domain mapping pattern information comprises first frequency-domain offsets of respective M REs used by the mapping set for mapping the reference signal; wherein, the first RE or the last RE in the mapping group is a reference RE, and for a first RE of the M REs, the first frequency domain offset of the first RE is a frequency domain offset between the first RE and the reference RE, where M is a positive integer and M is less than or equal to N.

34. The communication device according to any of claims 20 to 23 and 26 to 28, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is a mapping group, and N is a positive integer; the first frequency-domain mapping pattern information does not include respective first frequency-domain offsets of M REs used for mapping a reference signal in the mapping group, a first RE or a last RE in the mapping group is a reference RE, for any first RE of the M REs, the first frequency-domain offset of the first RE is a frequency-domain offset between the first RE and the reference RE, the M is a positive integer, and M is not greater than N;

the processing module or the receiving module is further configured to obtain respective first frequency domain offsets of M REs used for mapping a reference signal in the mapping group;

the processing module is specifically configured to map, according to the first frequency-domain mapping pattern information and the first frequency-domain offsets of the M REs in the mapping group, the reference signal and/or the data in the frequency-domain resource of at least one OFDM symbol in the first time-frequency resource.

35. The communication device according to any of claims 20 to 34, wherein every N consecutive resource elements RE in the frequency domain resource of one OFDM symbol is one mapping group, said N being a positive integer; the first data mapping pattern information includes: a first density of REs in the mapping set used to map the data; wherein the first density is a ratio of the number H of REs used for mapping data in the mapping group to the N, the H is an integer, and H is less than or equal to N; or,

36. The communications device of claim 35, wherein the first density is one of: 0. 1/2, 2/3, 1/3, 3/4, 2/4, 1/4, 5/6, 4/6, 3/6, 2/6, 1/6, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12.

37. The communication apparatus according to any of claims 20 to 36, wherein the first frequency-domain mapping pattern information comprises second frequency-domain offsets of H REs in the mapping group for mapping the data, wherein H is an integer, and H ≦ N;

38. The communication apparatus according to any of claims 20 to 23 and 26 to 36, wherein the first frequency-domain mapping pattern information does not include a second frequency-domain offset for each of the H REs used for mapping the data in the mapping group, a first RE or a last RE in the mapping group is a reference RE, and for any of the H REs, the second frequency-domain offset of the second RE is a frequency-domain offset between the second RE and the reference RE, H is an integer, and H ≦ N;

the processing module or the receiving module is further configured to obtain second frequency domain offsets of the H REs in the mapping group, which are used for mapping the data;

The processing module is specifically configured to map, according to the first frequency-domain mapping pattern information and the second frequency-domain offset of each of the H REs in the mapping group used for mapping the data, the reference signal and/or the data in the frequency-domain resource of at least one OFDM symbol in the first time-frequency resource.

39. A communication apparatus comprising a processor and a storage medium storing instructions that, when executed by the processor, cause the processor to perform the communication method of any one of claims 1-19.

40. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program; the computer program, when executed, implementing the method of any one of claims 1-19.