CN111800247B

CN111800247B - Information transmission method and device

Info

Publication number: CN111800247B
Application number: CN202010442442.7A
Authority: CN
Inventors: 刘鹍鹏; 刘江华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-05-29
Filing date: 2014-05-29
Publication date: 2024-11-22
Anticipated expiration: 2034-05-29
Also published as: CN108809607B; CN108737059A; CN111800247A; CN108737059B; CN106465354A; CN106465354B; CN108809607A; WO2015180098A1

Abstract

The embodiment of the present invention provides an information transmission method and device. The information transmission method proposed in the present invention includes: the second network device selects one from at least two candidate demodulation pilot patterns with the same number of ports, and maps the demodulation pilot signal to the candidate demodulation pilot pattern, and the number of ports is equal to the number of layers of the data stream; wherein the at least two candidate demodulation pilot patterns with the same number of ports are different, and at least one of the candidate demodulation pilot patterns contains a physical resource unit RE occupied by a non-zero power demodulation pilot signal and a physical resource unit RE occupied by a zero power demodulation pilot signal; the second network device sends the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first network device. The embodiment of the present invention realizes the configuration of different demodulation pilot patterns for different first network devices, avoids interference with other first network devices, and increases the number of multiplexed users.

Description

Information transmission method and device

Technical Field

The embodiment of the invention relates to a communication technology, in particular to an information transmission method and device.

Background

The 3D multi-antenna technology such as the dynamic three-dimensional (3D) beamforming technology is used as a key technology for improving the throughput rate of cell edge users, the total throughput rate and the average throughput rate of cell users, and draws the deep attention of the industry. According to the 3D channel information estimated by the user terminal, the 3D beam forming weight of the active antenna terminal is adjusted, so that the main lobe of the beam is aligned to the target user in the 3D space, the power of the received signal is greatly improved, the signal-to-interference-and-noise ratio is improved, and the throughput of the whole system is further improved. The 3D beamforming technique needs to be based on an active antenna system (ACTIVE ANTENNA SYSTEMS, AAS for short), which further provides a degree of freedom in the vertical direction relative to conventional antennas. The multi-user multiple input multiple output (MU MIMO) technology refers to that multiple users can multiplex the same time-frequency resource and spatially distinguish by different beamforming weights. Due to the introduction of 3D beamforming techniques, the number of spatially multiplexed users increases.

In a long term evolution (Long Term Evolution, abbreviated as LTE) system in the prior art, only up to 4 paired users are considered for configuration of demodulation pilot signals (demodulation REFERENCE SIGNAL, abbreviated as DMRS). Fig. 1 is a schematic diagram of a demodulation pilot signal configuration in the prior art, as shown in fig. 1, one physical resource block pair (Physical Resource Block pair, abbreviated as PRB pair) includes: 12×14 physical Resource Elements (REs), 12 demodulation pilot subcarriers, 2 slots, 7 OFDM symbols per slot, the horizontal axis representing time t and the vertical axis representing frequency f. The RE where the DMRS is located is the position where the gray shade RE is located in the figure. The REs in the diagonal line portion represent Common pilots (Common REFERENCE SIGNAL, CRS for short), where there are 4 users for MU MIMO multiplexing, UE1, UE2, UE3, UE4. The DMRS is multiplexed by combining different orthogonal spreading codes and different scrambling codes. The orthogonal spreading code is applied to REs where two adjacent OFDM symbols of the DMRS are located. UE1 adopts orthogonal spread spectrum codes (1, 1), and scrambling codes are generated by nscid; the UE2 adopts an orthogonal spread spectrum code (1, -1), and the scrambling code is also generated by nscid < 0 >; UE1 and UE2 are therefore perfectly orthogonal (the orthogonal spreading and scrambling codes described above are also used on slot 2). The UE3 adopts orthogonal spread spectrum codes (1, 1), and the scrambling codes are generated by nscid; the UE4 adopts an orthogonal spread spectrum code (1, -1), and the scrambling code is generated by nscid; so UE3 and UE4 are perfectly orthogonal. The multiplexing mode is the same in both time slots.

A problem with the prior art is that the DMRS configuration cannot meet the pilot multiplexing of the increased users.

Disclosure of Invention

The embodiment of the invention provides an information transmission method and device, which are used for solving the problem that the configuration of DMRS in the prior art cannot meet the pilot frequency multiplexing of increased users.

In a first aspect, an embodiment of the present invention provides an information transmission method, including:

the second network equipment determines one of at least two candidate demodulation pilot patterns with the same port number, and maps the demodulation pilot signals to time-frequency resources corresponding to the demodulation pilot patterns, wherein the port number is equal to the number of layers of the data stream;

wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one candidate demodulation pilot pattern comprises physical resource element RE occupied by a non-zero power demodulation pilot signal and physical resource element RE occupied by a zero power demodulation pilot signal;

and the second network equipment sends the mapped demodulation pilot signals and configuration information of the demodulation pilot signals to the first network equipment.

With reference to the first aspect, in a first implementation manner of the first aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

And the positions of the REs occupied by the non-zero power demodulation pilot signals in at least one candidate demodulation pilot pattern correspond to the positions of the REs occupied by the zero power demodulation pilot signals in the rest at least one candidate pilot pattern.

With reference to the first aspect, in a second implementation manner of the first aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

And in at least one candidate demodulation pilot pattern, the positions of the REs occupied by all the non-zero power demodulation pilot signals and the positions of the REs occupied by all the zero power demodulation pilot signals correspond to the positions of the REs occupied by the non-zero power demodulation pilot signals in the rest at least one candidate pilot pattern.

With reference to the first aspect, or the first implementation manner of the first aspect, in a third implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal and a time interval occupied by at least one zero power demodulation pilot signal are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal and a frequency bandwidth occupied by the zero power demodulation pilot signal are also different.

With reference to the first aspect, or the first and third implementation manners of the first aspect, in a fourth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by all non-zero power demodulation pilot signals is different from a time interval occupied by all zero power demodulation pilot signals.

With reference to the first aspect, or the first and third implementation manners of the first aspect, in a fifth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by all the non-zero power demodulation pilot signals is different from a frequency bandwidth occupied by all the zero power demodulation pilot signals.

With reference to the first aspect, or the first implementation manner of the first aspect, in a sixth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by the non-zero power demodulation pilot signal and a time interval occupied by the zero power demodulation pilot signal on a frequency bandwidth where an adjacent demodulation pilot signal is located are different; the time interval is a first time interval; and/or the number of the groups of groups,

In at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on the time interval where the adjacent demodulation pilot signals are positioned are different; the time interval is a first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a seventh implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by all the non-zero power demodulation pilot signals is the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the first aspect, in an eighth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in the first frequency bandwidth; the time interval is a second time interval, which is a smaller time interval than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a ninth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by the non-zero power demodulation pilot signal is the same.

With reference to the ninth implementation manner of the first aspect, in a tenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals in the same frequency bandwidth are distributed at equal intervals in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in an eleventh implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

In at least one candidate demodulation pilot frequency pattern, the frequency bandwidths occupied by the non-zero power demodulation pilot frequency signals on the time intervals of adjacent demodulation pilot frequency signals are different; the time interval is a first time interval.

With reference to the eleventh implementation manner of the first aspect, in a twelfth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by the non-zero power demodulation pilot signal is distributed at equal intervals, and an occupied frequency bandwidth is distributed at equal intervals.

With reference to any one of the third to sixth implementation manners of the first aspect, in a thirteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by all the zero-power demodulation pilot signals is the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the first aspect, in a fourteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in a same time interval are distributed at equal intervals in a first frequency bandwidth, where the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a fifteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by the zero-power demodulation pilot signal is the same.

With reference to the fifteenth implementation manner of the first aspect, in a sixteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals in the same frequency bandwidth are distributed at equal intervals in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a seventeenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the number of the groups of groups,

In at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the zero-power demodulation pilot signals on the time intervals occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval.

With reference to the seventeenth implementation manner of the first aspect, in an eighteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and occupied frequency bandwidths are distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the first aspect, in a nineteenth implementation manner of the first aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any one of the third to eighteenth implementation manners of the first aspect, in a twentieth implementation manner of the first aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

With reference to the first aspect, or any one of the first to the twentieth implementation manners of the first aspect, in a twenty-first implementation manner of the first aspect, the at least two candidate pilot patterns are sent to the first network device through dynamic signaling or high-layer signaling.

With reference to the twenty-first implementation manner of the first aspect, in a twenty-second implementation manner of the first aspect, the dynamic signaling or the higher layer signaling is cell-specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user group specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user specific.

With reference to the first aspect, or any one implementation manner of the first to the twenty-second aspects, in a twenty-third implementation manner of the first aspect, one pilot pattern of the at least two candidate pilot patterns is sent to the first network device through dynamic signaling or high-layer signaling.

In a second aspect, an embodiment of the present invention provides an information transmission method, including:

the first network equipment obtains a demodulation pilot frequency pattern according to the received demodulation pilot frequency configuration information, and receives a demodulation pilot frequency signal according to the corresponding demodulation pilot frequency pattern; the demodulation pilot frequency pattern is one of at least two candidate demodulation pilot frequency patterns with the same port number, and the port number is equal to the layer number of the data stream;

Wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one of the candidate demodulation pilot patterns comprises physical resource element REs occupied by non-zero power demodulation pilot signals and physical resource element REs occupied by zero power demodulation pilot signals.

With reference to the second aspect, in a first implementation manner of the second aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

With reference to the second aspect, in a second implementation manner of the second aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

And in at least one candidate demodulation pilot frequency pattern, the positions of the REs occupied by all the non-zero power demodulation pilot frequency signals and the positions of the REs occupied by all the zero power demodulation pilot frequency signals correspond to the positions of the REs occupied by the non-zero power demodulation pilot frequency signals in the rest at least one candidate pilot frequency pattern.

With reference to the second aspect, or the first implementation manner of the second aspect, in a third implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal and a time interval occupied by at least one zero power demodulation pilot signal are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal and a frequency bandwidth occupied by the zero power demodulation pilot signal are also different.

With reference to the second aspect, or the first and third implementation manners of the second aspect, in a fourth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by all non-zero power demodulation pilot signals is different from a time interval occupied by all zero power demodulation pilot signals.

With reference to the second aspect, or the first and third implementation manners of the second aspect, in a fifth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by all the non-zero power demodulation pilot signals is different from a frequency bandwidth occupied by all the zero power demodulation pilot signals.

With reference to the second aspect, or the first implementation manner of the second aspect, in a sixth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, the time interval occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on the frequency bandwidth where the adjacent demodulation pilot signal is located is different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to any one implementation manner of the third to sixth implementation manners of the second aspect, in a seventh implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the second aspect, in an eighth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in the first frequency bandwidth; the time interval is a second time interval, which is a smaller time interval than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in a ninth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by the non-zero power demodulation pilot signal is the same.

With reference to the ninth implementation manner of the second aspect, in a tenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals in the same frequency bandwidth are equally distributed in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in an eleventh implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the eleventh implementation manner of the second aspect, in at least one candidate demodulation pilot pattern in the twelfth implementation manner of the second aspect, the time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and the occupied frequency bandwidths are distributed at equal intervals.

With reference to any implementation manner of the third to sixth implementation manner of the second aspect, in a thirteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the second aspect, in a fourteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in a same time interval are distributed at equal intervals in a first frequency bandwidth, where the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in a fifteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by the zero-power demodulation pilot signal is the same.

With reference to the fifteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern in the sixteenth implementation manner of the second aspect, time intervals occupied by the zero-power demodulation pilot signals in the same frequency bandwidth are equally distributed in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in a seventeenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the seventeenth implementation manner of the second aspect, in an eighteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by the zero-power demodulation pilot signal is distributed at equal intervals, and an occupied frequency bandwidth is distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the second aspect, in a nineteenth implementation manner of the second aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any one of the third to eighteenth implementation manners of the second aspect, in a twentieth implementation manner of the second aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

With reference to the second aspect, or any one of third to twenty-first implementation manners of the second aspect, in a twenty-first implementation manner of the second aspect, the first network device receives the at least two candidate pilot patterns sent by the second network device through dynamic signaling or high layer signaling.

With reference to the twenty-first implementation manner of the second aspect, in a twenty-second implementation manner of the second aspect, the first network device is a user equipment, and the second network device is a base station; or alternatively, the first and second heat exchangers may be,

The first network device is user equipment, and the second network device is user equipment; or alternatively, the first and second heat exchangers may be,

The first network device is a network device, and the second network device is a network device.

With reference to the twenty-first implementation manner of the second aspect, in a twenty-third implementation manner of the second aspect, the dynamic signaling or the higher layer signaling is cell-specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user specific.

With reference to the second aspect, or any one implementation manner of the first to twenty-third aspects, in a twenty-fourth implementation manner of the second aspect, the first network device receives one pilot pattern of the at least two candidate pilot patterns sent by the second network device through dynamic signaling or higher layer signaling.

In a third aspect, an embodiment of the present invention provides an information transmission apparatus, including:

The mapping module is used for determining one of at least two candidate demodulation pilot patterns with the same port number, mapping the demodulation pilot signals to time-frequency resources corresponding to the demodulation pilot patterns, wherein the port number is equal to the number of layers of a data stream;

and the sending module is used for sending the mapped demodulation pilot signals and configuration information of the demodulation pilot signals to the first network equipment.

With reference to the third aspect, in a first implementation manner of the third aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

With reference to the third aspect, in a second implementation manner of the third aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

With reference to the third aspect, or the first implementation manner of the third aspect, in a third implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal and a time interval occupied by at least one zero power demodulation pilot signal are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal and a frequency bandwidth occupied by the zero power demodulation pilot signal are also different.

With reference to the third aspect, or the first and third implementation manners of the third aspect, in a fourth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by all the non-zero power demodulation pilot signals is different from a time interval occupied by all the zero power demodulation pilot signals.

With reference to the third aspect, or the first and third implementation manners of the third aspect, in a fifth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by all the non-zero power demodulation pilot signals is different from a frequency bandwidth occupied by all the zero power demodulation pilot signals.

With reference to the third aspect, or the first implementation manner of the third aspect, in a sixth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the third aspect, or any implementation manner of the first to third aspects, in a seventh implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the third aspect, in an eighth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in the first frequency bandwidth; the time interval is a second time interval, which is a smaller time interval than the first time interval.

With reference to the third aspect, or any implementation manner of the first to third aspects, in a ninth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by the non-zero power demodulation pilot signal is the same.

With reference to the ninth implementation manner of the third aspect, in a tenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals in the same frequency bandwidth are distributed at equal intervals in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to the third aspect, or any implementation manner of the first to third aspects, in an eleventh implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the eleventh implementation manner of the third aspect, in a twelfth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and occupied frequency bandwidths are distributed at equal intervals.

With reference to the third aspect, or any implementation manner of the first to third aspects, in a thirteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the third aspect, in a fourteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in a same time interval are distributed at equal intervals in a first frequency bandwidth, where the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to the third aspect, or any implementation manner of the first to third aspects, in a fifteenth implementation manner of the third aspect, the frequency bandwidth occupied by the zero-power demodulation pilot signal is the same in at least one candidate demodulation pilot pattern.

With reference to the fifteenth implementation manner of the third aspect, in a sixteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals in the same frequency bandwidth are distributed at equal intervals in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to the third aspect, or any implementation manner of the first to third aspects, in a seventeenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the seventeenth implementation manner of the third aspect, in an eighteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and occupied frequency bandwidths are distributed at equal intervals.

With reference to any implementation manner of the third aspect, in a nineteenth implementation manner of the third aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any implementation manner of the third to eighteenth aspects, in a twentieth implementation manner of the third aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a physical resource block PRB.

With reference to the third aspect, or any one of the first to twenty-first implementation manners of the third aspect, in a twenty-first implementation manner of the third aspect, the at least two candidate pilot patterns are sent to the first network device through dynamic signaling or high layer signaling.

With reference to the twenty-first implementation manner of the third aspect, in a twenty-second implementation manner of the third aspect, the dynamic signaling or the higher layer signaling is cell-specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user specific.

With reference to the third aspect, or any one implementation manner of the first to twenty-second aspects, in a twenty-third implementation manner of the third aspect, one pilot pattern of the at least two candidate pilot patterns is sent to the first network device through dynamic signaling or high layer signaling.

In a fourth aspect, an embodiment of the present invention provides an information transmission apparatus, including:

The acquisition module is used for acquiring a demodulation pilot frequency pattern according to the received demodulation pilot frequency configuration information and receiving a demodulation pilot frequency signal according to the corresponding demodulation pilot frequency pattern; the demodulation pilot frequency pattern is one of at least two candidate demodulation pilot frequency patterns with the same port number, and the port number is equal to the layer number of the data stream;

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

With reference to the fourth aspect, in a second implementation manner of the fourth aspect, the at least two candidate demodulation pilot patterns with the same port number are different, including:

With reference to the fourth aspect, or the first implementation manner of the fourth aspect, in a third implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal and a time interval occupied by at least one zero power demodulation pilot signal are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal and a frequency bandwidth occupied by the zero power demodulation pilot signal are also different.

With reference to the fourth aspect, or the first and third implementation manners of the fourth aspect, in a fourth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by all the non-zero power demodulation pilot signals is different from a time interval occupied by all the zero power demodulation pilot signals.

With reference to the fourth aspect, or the first and third implementation manners of the fourth aspect, in a fifth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by all the non-zero power demodulation pilot signals is different from a frequency bandwidth occupied by all the zero power demodulation pilot signals.

With reference to the fourth aspect, or the first implementation manner of the fourth aspect, in a sixth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, the time interval occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on the frequency bandwidth where the adjacent demodulation pilot signal is located is different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to any implementation manner of the third to sixth implementation manner of the fourth aspect, in a seventh implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the fourth aspect, in an eighth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in the first frequency bandwidth; the time interval is a second time interval, which is a smaller time interval than the first time interval.

With reference to any implementation manner of the third to sixth implementation manner of the fourth aspect, in a ninth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, the frequency bandwidth occupied by the non-zero power demodulation pilot signal is the same.

With reference to the ninth implementation manner of the fourth aspect, in a tenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals in the same frequency bandwidth are equally distributed in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any implementation manner of the third to sixth implementation manner of the fourth aspect, in an eleventh implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the eleventh implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern in the twelfth implementation manner of the fourth aspect, the time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and the occupied frequency bandwidths are distributed at equal intervals.

With reference to any implementation manner of the third to sixth implementation manner of the fourth aspect, in a thirteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the fourth aspect, in a fourteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in a same time interval are distributed at equal intervals in a first frequency bandwidth, where the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to any implementation manner of the third to sixth implementation manner of the fourth aspect, in a fifteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by the zero-power demodulation pilot signal is the same.

With reference to the fifteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern in the sixteenth implementation manner of the fourth aspect, time intervals occupied by the zero-power demodulation pilot signals in the same frequency bandwidth are equally distributed in a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any implementation manner of the third to sixth implementation manner of the fourth aspect, in a seventeenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the number of the groups of groups,

With reference to the seventeenth implementation manner of the fourth aspect, in an eighteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and occupied frequency bandwidths are distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the fourth aspect, in a nineteenth implementation manner of the fourth aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any implementation manner of the third to eighteenth implementation manner of the fourth aspect, in a twentieth implementation manner of the fourth aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

With reference to the fourth aspect, or any implementation manner of the third to twenty-first implementation manners of the fourth aspect, in a twenty-first implementation manner of the fourth aspect, the acquiring module is specifically configured to: the at least two candidate pilot patterns sent by the second network device through dynamic signaling or high-layer signaling are received.

With reference to the twenty-first implementation manner of the fourth aspect, in a twenty-second implementation manner of the fourth aspect, the first network device is a user equipment, and the second network device is a base station; or alternatively, the first and second heat exchangers may be,

With reference to the twenty-first implementation manner of the fourth aspect, in a twenty-third implementation manner of the fourth aspect, the dynamic signaling or the higher layer signaling is cell-specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user specific.

With reference to the fourth aspect, or any one implementation manner of the first to twenty-third implementation manners of the fourth aspect, in a twenty-fourth implementation manner of the fourth aspect, the acquiring module is specifically configured to: and receiving one pilot pattern of the at least two candidate pilot patterns sent by the second network equipment through dynamic signaling or high-layer signaling.

In a fifth aspect, an embodiment of the present invention provides a second network device, including:

A processor and a memory storing execution instructions that, when executed by the second network device, cause the second network device to perform the method of any of the first aspects.

In a sixth aspect, an embodiment of the present invention provides a first network device, including:

A processor and a memory storing execution instructions that, when executed by the first network device, cause the first network device to perform the method of any of the second aspects.

The method and the device for configuring the demodulation pilot frequency in the embodiment of the invention determine one of at least two candidate demodulation pilot frequency patterns with the same port number through the second network equipment, map the demodulation pilot frequency signal to the demodulation pilot frequency patterns, and the port number is equal to the layer number of the data stream; at least two candidate demodulation pilot patterns with the same port number are different, at least one candidate demodulation pilot pattern comprises physical resource element RE occupied by a non-zero power demodulation pilot signal and physical resource element RE occupied by a zero power demodulation pilot signal, and the mapped demodulation pilot signals and configuration information of the demodulation pilot signals are sent to first network equipment, so that different demodulation pilot patterns are configured for different first network equipment, interference to other first network equipment is avoided, the number of multiplexing users can be increased, and the problem that the configuration of DMRS pilot cannot meet pilot multiplexing of increased users in the prior art is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic diagram of a demodulation pilot signal configuration in the prior art;

fig. 2 is a flowchart of a demodulation pilot signal configuration method according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of a candidate demodulation pilot pattern according to a first embodiment of the method;

fig. 4 is a schematic diagram of a second candidate demodulation pilot pattern according to a first embodiment of the method of the present invention;

fig. 5 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 5A is a schematic diagram of a second candidate demodulation pilot pattern according to a second embodiment of the method of the present invention;

fig. 6 is a schematic diagram III of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 7 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 8 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

Fig. 9 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

Fig. 10 is a schematic diagram seventh of a candidate demodulation pilot pattern according to a second embodiment of the method of the present invention;

Fig. 11 is a schematic diagram eight of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 12 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 13 is a schematic diagram of a candidate demodulation pilot pattern in accordance with a third embodiment of the present invention;

Fig. 14 is a schematic structural diagram of a network device according to a first embodiment of the present invention;

Fig. 15 is a schematic structural diagram of a first network device according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a second embodiment of a network device according to the present invention;

fig. 17 is a schematic structural diagram of a second embodiment of the first network device of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Fig. 2 is a flowchart of a first embodiment of an information transmission method according to the present invention. Fig. 3 is a schematic diagram of a candidate demodulation pilot pattern according to a first embodiment of the method; the pattern may refer to a corresponding positional relationship, where the corresponding positional relationship indicates a position of a subcarrier and an OFDM symbol where the pilot signal is located. Fig. 4 is a schematic diagram of a second candidate demodulation pilot pattern according to a first embodiment of the method of the present invention. The execution body of the embodiment may be a second network device, such as a base station. The scheme of the embodiment is applied between the second network equipment and the first network equipment to carry out the configuration of the demodulation pilot signals. In the embodiment of the invention, the first network device may be user equipment, and the second network device may be a base station; or the first network device and the second network device are both user devices; alternatively, both the first network device and the second network device are network devices (e.g., base stations, etc.). As shown in fig. 2, the method of the present embodiment may include:

Step 201, the second network device determines one of at least two candidate demodulation pilot patterns with the same port number, maps the demodulation pilot signals to time-frequency resources corresponding to the demodulation pilot patterns, and the port number is equal to the number of layers of the data stream; wherein at least two candidate demodulation pilot patterns with the same port number are different, and at least one candidate demodulation pilot pattern comprises physical resource element RE occupied by a non-zero power demodulation pilot signal and physical resource element RE occupied by a zero power demodulation pilot signal.

Specifically, as shown in fig. 3 and 4, two candidate demodulation pilot patterns are shown, in the embodiment of the present invention, one of at least two candidate demodulation pilot patterns is determined to map a demodulation pilot signal to the demodulation pilot pattern, the number of ports corresponding to the at least two candidate demodulation pilot patterns must be the same, the number of ports is equal to the number of layers of a data stream, and a second network device, such as a base station, selects one of the at least two candidate demodulation pilot patterns with the same number of ports, and maps the demodulation pilot signal to the demodulation pilot pattern; the candidate demodulation pilot pattern refers to a demodulation pilot pattern used when the base station allocates a single physical resource block to the first network device, such as user equipment UE, to perform channel estimation on the PRB pair. Each candidate demodulation pilot pattern includes a plurality of REs, grayAnd grey squareRE is RE occupied by demodulation pilot signal, RE of oblique line partRepresenting a common pilot. The port number refers to the number of logical antenna ports and is equal to the number of layers of the data stream.

Wherein at least two candidate demodulation pilot patterns having the same port number are different, and each candidate demodulation pilot pattern includes physical resource element REs occupied by a non-zero power demodulation pilot signal and physical resource element REs occupied by a zero power demodulation pilot signal. As shown in fig. 3, REs occupied by non-zero power DMRS are REs (gray REs) at positions of 6th and 7 th OFDM (from left to right) symbols on 2 nd, 7 th and 12 th subcarriers (from bottom to top in fig. 3), and REs occupied by zero power DMRS are REs (gray square REs) at positions of 13 th and 14 th OFDM symbols on 2 nd, 7 th and 12 th subcarriers.

Optionally, at least two candidate demodulation pilot patterns with the same port number are different, including:

It should be noted that, in the embodiment of the present invention, only the first network device is used as the UE, but the embodiment of the present invention is not limited thereto, and the scheme of the present invention may also be used between network devices or between user devices.

Specifically, in the candidate demodulation pilot pattern shown in fig. 4, REs occupied by non-zero power DMRS and physical resource element REs occupied by zero power DMRS are opposite to those in the candidate demodulation pilot pattern shown in fig. 3, that is, REs occupied by non-zero power DMRS in fig. 4 correspond to REs occupied by zero power DMRS in fig. 3, and REs occupied by zero power DMRS in fig. 4 correspond to REs occupied by non-zero power DMRS in fig. 3.

The DMRS is multiplexed by combining different orthogonal spreading codes and different scrambling codes. The orthogonal spreading code is applied to REs where two adjacent OFDM symbols of the DMRS are located. In the configuration manner shown in fig. 3 and 4, 4 user equipments may be used to perform MU MIMO multiplexing, that is, a total of 8 user equipments may be used to perform MU MIMO multiplexing, where UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE8. Dividing UE1, UE2, UE5 and UE6 into a group, and adopting the configuration mode shown in fig. 3, namely, adopting REs at positions of 6 th and 7 th OFDM symbols on 2, 7 th and 12 sub-carriers to send demodulation pilot signals by UE1, UE2 and UE5, and UE 6; The UE3, the UE4, the UE7 and the UE8 are divided into a group, and the configuration mode shown in the figure 4 is adopted, namely, the UE3, the UE4, the UE7 and the UE8 all adopt REs at the 13 th OFDM symbol and the 14 th OFDM symbol on the 2 sub-carriers, the 7 sub-carriers and the 12 sub-carriers to send demodulation pilot signals; UE1 corresponds to the orthogonal spreading codes (1, 1), and the scrambling codes are generated according to nscid; UE2 corresponds to the orthogonal spreading codes (1, -1), and the scrambling codes are generated according to nscid; so UE1 and UE2 are perfectly orthogonal. The UE5 corresponds to the orthogonal spreading codes (1, 1), and the scrambling codes are generated according to nscid; UE6 corresponds to orthogonal spreading codes (1, -1), and the scrambling codes are also generated according to nscid; So UE5 and UE6 are perfectly orthogonal. And UE1 and UE5 use the same orthogonal spreading code but different scrambling codes, and do not generate interference. The (1, 1) spreading codes corresponding to UE1 and UE5 indicate that the two REs of the 6 th and 7 th OFDM symbols on the sub-carrier where each pilot frequency is located are spread by adopting (1, 1), and the (1-1) of UE2 and UE6 indicate that the two REs of the 6 th and 7 th OFDM symbols on the sub-carrier where each pilot frequency is located are spread by adopting (1-1); UE3 corresponds to orthogonal spreading code (1, 1), scrambling code is generated according to nscid a, UE4 corresponds to orthogonal spreading code (1, -1), scrambling code is generated according to nscid a; So UE3 and UE4 are perfectly orthogonal. UE7 corresponds to orthogonal spreading code (1, 1), scrambling code is generated according to nscid, UE8 corresponds to orthogonal spreading code (1, -1), scrambling code is generated according to nscid; UE7 and UE8 are thus perfectly orthogonal; the (1, 1) spreading codes corresponding to UE3 and UE7 indicate that two REs of the 13 th and 14 th OFDM symbols on the subcarrier where each pilot frequency is located are spread by using (1, 1); the (1, -1) spreading codes corresponding to UE4 and UE8 indicate that the (1, -1) is used to spread the two REs of the 13 th and 14 th OFDM symbols on the sub-carrier where each pilot is located. the RE occupied by the non-zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE3, the UE4, the UE7 and the UE8 cannot generate interference to the pilots of the UE1, the UE2, the UE5 and the UE 6; the REs occupied by the zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 are the same as the REs occupied by the non-zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE1, the UE2, the UE5 and the UE6 cannot generate interference to the pilots of the UE3, the UE4, the UE7 and the UE 8.

As shown in fig. 1,3, and 4, MU MIMO multiplexing may be performed by a total of 6 users UE1, UE2, UE3, UE4, UE5, and UE 6. A group of UE2 and UE5 adopts a configuration mode shown in figure 3, namely, UE2 and UE5 both adopt REs at positions of 6 th and 7 th OFDM symbols on 2, 7 th and 12 sub-carriers to transmit demodulation pilot signals; UE3 and UE6 are divided into a group to adopt a configuration mode shown in figure 4, namely, UE3 and UE6 adopt REs at 13 th and 14 th OFDM symbols on 2, 7 and 12 subcarriers to transmit demodulation pilot signals; the configuration mode shown in fig. 1 in the prior art is adopted for the UE1 and the UE 4; namely, UE1 and UE4 both transmit demodulation pilot signals using REs at positions of the 6 th, 7 th and 13 th, 14 th OFDM symbols on the 2, 7, 12 subcarriers; UE1 corresponds to an orthogonal spreading code (1, 1), which means that two REs of the 6 th and 7 th OFDM symbols on the sub-carrier where each pilot frequency is located are spread by adopting (1, 1), and two REs of the 13 th and 14 th OFDM symbols are also spread by adopting (1, 1), and a scrambling code is generated according to nscid 0; UE2 corresponds to the orthogonal spreading codes (1, -1), and the scrambling codes are generated according to nscid; UE1 and UE2 are completely orthogonal, and no interference is generated; the UE5 corresponds to the orthogonal spreading code (1, -1) and the scrambling code is generated according to nscid. The orthogonal spreading codes used by the UE2 and the UE5 are the same but the scrambling codes are different, and interference is not generated; the (1, -1) spreading codes corresponding to UE2 and UE5 indicate that the (1, -1) is used to spread the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located. UE3 corresponds to orthogonal spreading codes (1, -1), scrambling codes are generated according to nscid0, UE4 corresponds to orthogonal spreading codes (1, 1), and scrambling codes are generated according to nscid (same as UE 1); the UE3 and the UE4 are completely orthogonal, and no interference is generated; the UE6 corresponds to the orthogonal spreading codes (1, -1), and the scrambling codes are generated according to nscid; the (1, -1) spreading codes corresponding to UE3 and UE6 indicate that the (1, -1) is used to spread the two REs of the 13 th and 14 th OFDM symbols on the sub-carrier where each pilot is located. Wherein, UE1 and UE4 are existing UEs and can only adopt the configuration mode shown in fig. 1. The non-zero power demodulation pilot signals of the UE2 and the UE5 occupy the same RE positions as the zero power demodulation pilot signals of the UE3 and the UE6, so that the UE3 and the UE6 cannot generate interference to the pilots of the UE2 and the UE 5. The non-zero power demodulation pilot signals of the UE3 and the UE6 occupy the same RE positions as the zero power demodulation pilot signals of the UE2 and the UE5, so that the UE2 and the UE5 cannot generate interference to the pilot frequencies of the UE3 and the UE 6.

As shown in fig. 1,3, and 4, MU MIMO multiplexing may be performed by 7 users UE1, UE2, UE3, UE4, UE5, UE6, and UE 7. Dividing UE2, UE4 and UE5 into a group, and adopting the configuration mode shown in fig. 3, namely, all of UE2, UE4 and UE5 adopt REs at positions of 6 th and 7 th OFDM symbols on 2, 7 th and 12 sub-carriers to transmit demodulation pilot signals; UE3, UE6, UE7 are divided into a group to adopt the configuration mode shown in figure 4, and UE3, UE6 and UE7 all adopt REs at the 13 th and 14 th OFDM symbols on 2, 7 and 12 sub-carriers to transmit demodulation pilot signals; The UE1 adopts the configuration mode shown in fig. 1 in the prior art, that is, the UE1 adopts REs at the positions of the 6 th, 7 th and 13 th OFDM symbols and 14 th OFDM symbols on the 2, 7 th and 12 th subcarriers to transmit demodulation pilot signals; UE1 corresponds to an orthogonal spreading code (1, 1), which means that two REs of the 6 th and 7 th OFDM symbols on the sub-carrier where each pilot frequency is located are spread by adopting (1, 1), and two REs of the 13 th and 14 th OFDM symbols are also spread by adopting (1, 1), and a scrambling code is generated according to nscid 0; UE2 corresponds to the orthogonal spreading codes (1, -1), and the scrambling codes are generated according to nscid; UE1 and UE2 are completely orthogonal, and no interference is generated; the UE4 corresponds to the orthogonal spread spectrum codes (1, 1), the scrambling codes are generated according to nscid, the UE5 corresponds to the orthogonal spread spectrum codes (1, -1), the scrambling codes are generated according to nscid, and the UE4 and the UE5 are completely orthogonal without interference; the orthogonal spreading codes used by the UE2 and the UE5 are the same but the scrambling codes are different, and interference is not generated; the (1, -1) spreading codes corresponding to UE2 and UE5 indicate that the (1, -1) is used to spread the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located. The (1, 1) spreading code corresponding to the UE4 indicates that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot frequency is located spread by using (1, 1); UE3 corresponds to the orthogonal spreading codes (1, -1), and the scrambling codes are generated according to nscid; the UE6 corresponds to the orthogonal spreading codes (1, 1), and the scrambling codes are generated according to nscid; the UE7 corresponds to the orthogonal spread spectrum codes (1, -1), the scrambling codes are generated according to nscid, the UE6 and the UE7 are completely orthogonal, and no interference is generated; the orthogonal spreading codes used by the UE3 and the UE7 are the same but the scrambling codes are different, and interference is not generated; the (1, -1) spreading codes corresponding to UE3 and UE7 indicate that the two REs of the 6 th and 7 th OFDM symbols on the sub-carriers where each pilot is located are spread with (1, -1). The (1, 1) spreading code corresponding to UE6 indicates that the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, 1). Wherein, UE1 is an existing UE and can only adopt the configuration mode shown in fig. 1. The RE occupied by the non-zero power demodulation pilot signals of the UE2, the UE4 and the UE5 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE6 and the UE7, so that the UE3, the UE6 and the UE7 cannot generate interference to the pilots of the UE2, the UE4 and the UE 5; the REs occupied by the zero power demodulation pilot signals of UE2, UE4 and UE5 are the same as the REs occupied by the non-zero power demodulation pilot signals of UE3, UE6 and UE7, so that UE2, UE4 and UE5 will not interfere with the pilots of UE3, UE6 and UE 7.

And the positions of the REs occupied by all non-zero power demodulation pilot signals and the positions of the REs occupied by all zero power demodulation pilot signals in at least one candidate demodulation pilot pattern correspond to the positions of the REs occupied by the non-zero power demodulation pilot signals in the rest at least one candidate pilot pattern.

Specifically, in the candidate demodulation pilot pattern shown in fig. 3 or 4, all REs occupied by the non-zero power DMRS and all physical resource element REs occupied by the zero power DMRS correspond to the positions of REs occupied by the non-zero power demodulation pilot signal in the candidate demodulation pilot pattern shown in fig. 1.

Step 202, the second network device sends the mapped demodulated pilot signal and configuration information of the demodulated pilot signal to the first network device.

Specifically, the second network device sends the demodulated pilot signal mapped onto the demodulated pilot pattern and configuration information of the demodulated pilot signal to the first network device, where the configuration information of the demodulated pilot signal indicates:

a physical resource unit occupied by a non-zero power demodulation pilot signal; or (b)

A physical resource unit occupied by a zero-power demodulation pilot signal; or (b)

Spreading codes; or (b)

At least one of the scrambling code information.

In this embodiment, one of at least two candidate demodulation pilot patterns with the same port number is determined by the second network device, and the demodulation pilot signal is mapped onto a time-frequency resource corresponding to the demodulation pilot pattern, where the port number is equal to the number of layers of the data stream; at least two candidate demodulation pilot patterns with the same port number are different, at least one candidate demodulation pilot pattern comprises physical resource element RE occupied by a non-zero power demodulation pilot signal and physical resource element RE occupied by a zero power demodulation pilot signal, and the mapped demodulation pilot signals and configuration information of the demodulation pilot signals are sent to first network equipment, so that different demodulation pilot patterns are configured for different first network equipment, interference to other first network equipment is avoided, the number of multiplexing users can be increased, and the problem that the configuration of DMRS in the prior art cannot meet pilot multiplexing of increased users is solved.

Fig. 5 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention. Fig. 5A is a schematic diagram of a second candidate demodulation pilot pattern according to a second embodiment of the method of the present invention. Fig. 6 is a schematic diagram III of a candidate demodulation pilot pattern according to a second embodiment of the method of the present invention. Fig. 7 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the method of the present invention. Fig. 8 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention. Fig. 9 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the method of the present invention. Fig. 10 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention. Fig. 11 is a schematic diagram eight of a candidate demodulation pilot pattern according to a second embodiment of the method of the present invention. Fig. 12 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention. Based on the method embodiment shown in fig. 1, in this embodiment, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal and a time interval occupied by at least one zero power demodulation pilot signal are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal and a frequency bandwidth occupied by the zero power demodulation pilot signal are also different.

Or alternatively

In at least one candidate demodulation pilot pattern, the time intervals occupied by all the non-zero power demodulation pilot signals and the time intervals occupied by all the zero power demodulation pilot signals are different, and the frequency bandwidths occupied by all the non-zero power demodulation pilot signals and the frequency bandwidths occupied by all the zero power demodulation pilot signals are also different.

Specifically, in the candidate demodulation pilot pattern shown in fig. 5, REs occupied by the non-zero power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM (from left to right) symbols on the 2 nd, 7 th and 12 th subcarriers (from bottom to top in fig. 5), and REs occupied by the zero power DMRS are REs (gray square REs) at positions of 13 th and 14 th OFDM symbols on the 1 st, 6 th and 11 th subcarriers. All the time intervals occupied by the non-zero power demodulation pilot signals are the time length of the first time slot, all the time intervals occupied by the zero power demodulation pilot signals are the time length of the second time slot, therefore, all the time intervals occupied by the non-zero power demodulation pilot signals are different from all the time intervals occupied by the zero power demodulation pilot signals, the frequency bandwidths occupied by all the non-zero power demodulation pilot signals are the 2 nd, 7 th and 12 th subcarriers, the frequency bandwidths occupied by all the zero power demodulation pilot signals are the frequency bandwidths of the 1 st, 6 th and 11 th subcarriers, and therefore, the frequency bandwidths occupied by all the non-zero power demodulation pilot signals are also different from the frequency bandwidths occupied by all the zero power demodulation pilot signals.

The DMRS multiplexing method may be as follows: by adopting the configuration modes in fig. 5 and 5A, MU MIMO multiplexing can be performed by 4 users, that is, multiplexing can be performed by 8 users in total, UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE8. Dividing UE1, UE2, UE5 and UE6 into a group, and adopting the configuration mode shown in fig. 5, namely, adopting REs at positions of 6 th and 7 th OFDM symbols on 2, 7 th and 12 sub-carriers to send demodulation pilot signals by UE1, UE2 and UE5, and UE 6; the UE3, the UE4, the UE7 and the UE8 are divided into a group, and the configuration mode shown in the figure 5A is adopted, namely, the UE3, the UE4, the UE7 and the UE8 all adopt REs at the 13 th OFDM symbol position and the 14 th OFDM symbol position on the 1, 6 and 11 sub-carriers to send demodulation pilot signals; UE1 corresponds to the orthogonal spreading codes (1, 1), and the scrambling codes are generated according to nscid; UE2 corresponds to the orthogonal spreading codes (1, -1), and the scrambling codes are generated according to nscid; so UE1 and UE2 are perfectly orthogonal. The UE5 corresponds to the orthogonal spreading codes (1, 1), and the scrambling codes are generated according to nscid; UE6 corresponds to orthogonal spreading codes (1, -1), and the scrambling codes are also generated according to nscid; so UE5 and UE6 are perfectly orthogonal. The orthogonal spreading codes used by the UE1 and the UE5 are the same but the scrambling codes are different, and interference is not generated; the (1, 1) spreading codes corresponding to UE1 and UE5 indicate that the two REs of the 6 th and 7 th OFDM symbols on the sub-carrier where each pilot is located are spread with (1, 1), and the (1, -1) of UE2 and UE6 indicate that the two REs of the 6 th and 7 th OFDM symbols on the sub-carrier where each pilot is located are spread with (1, -1). UE3 corresponds to orthogonal spreading code (1, 1), scrambling code is generated according to nscid a, UE4 corresponds to orthogonal spreading code (1, -1), scrambling code is generated according to nscid a; so UE3 and UE4 are perfectly orthogonal. UE7 corresponds to orthogonal spreading code (1, 1), scrambling code is generated according to nscid, UE8 corresponds to orthogonal spreading code (1, -1), scrambling code is generated according to nscid; UE7 and UE8 are thus perfectly orthogonal; the (1, 1) spreading code corresponding to UE3 and UE7 indicates that the two REs of the 13 th and 14 th OFDM symbols on the sub-carrier where each pilot is located are spread with (1, 1), and the (1, -1) corresponding to UE4 and UE8 indicates that the two REs of the 13 th and 14 th OFDM symbols on the sub-carrier where each pilot is located are spread with (1, -1). the RE occupied by the non-zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE3, the UE4, the UE7 and the UE8 cannot generate interference to the pilots of the UE1, the UE2, the UE5 and the UE 6; the REs occupied by the zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 are the same as the REs occupied by the non-zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE1, the UE2, the UE5 and the UE6 cannot generate interference to the pilots of the UE3, the UE4, the UE7 and the UE 8.

Other numbers of user multiplexing manners are also possible, and similar to those in the first embodiment, the details are not repeated here.

Optionally, in the at least one candidate demodulation pilot pattern, the time intervals occupied by all non-zero power demodulation pilot signals and the time intervals occupied by all zero power demodulation pilot signals are different.

Specifically, in the above cases, the candidate demodulation pilot patterns shown in fig. 3 and 4 may be adopted, as shown in fig. 3, the time intervals occupied by all the non-zero power demodulation pilot signals are the time length of the first time slot, and the time intervals occupied by all the zero power demodulation pilot signals are the time length of the second time slot, so that the time intervals occupied by all the non-zero power demodulation pilot signals are different from the time intervals occupied by all the zero power demodulation pilot signals, which are not described herein.

Optionally, in the at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by all non-zero power demodulation pilot signals and the frequency bandwidths occupied by all zero power demodulation pilot signals are different.

Specifically, in the candidate demodulation pilot pattern shown in fig. 6, REs occupied by the non-zero power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM symbols on the 12 th subcarrier, and REs (gray REs) at positions of 13 th and 14 th OFDM symbols on the 12 th subcarrier; the REs occupied by the zero-power DMRS are REs (gray square REs) at positions of the 6 th and 7 th OFDM symbols on the 2 nd and 7 th subcarriers, and REs (gray square REs) at positions of the 13 th and 14 th OFDM symbols on the 2 nd and 7 th subcarriers. The REs occupied by the non-zero power DMRS and the physical resource element REs occupied by the zero power DMRS in the candidate demodulation pilot pattern as shown in fig. 7 are the reverse of those in fig. 6, i.e., the REs occupied by the non-zero power DMRS in fig. 7 correspond to the REs occupied by the zero power DMRS in fig. 6, and the REs occupied by the zero power DMRS in fig. 7 correspond to the REs occupied by the non-zero power DMRS in fig. 6. The frequency bandwidth occupied by all non-zero power demodulation pilot signals in the pattern is different from the frequency bandwidth occupied by all zero power demodulation pilot signals, where the frequency bandwidth is, for example, the frequency width of a subcarrier. Such candidate demodulation pilot patterns may increase time sampling, improving channel estimation performance.

The candidate demodulation pilot patterns shown in fig. 8 and 9 are similar to those shown in fig. 6 and 7, and will not be described again here.

As shown in fig. 10, the bandwidth occupied by all non-zero power demodulation pilot signals of the candidate demodulation pilot pattern is different from the bandwidth occupied by all zero power demodulation pilot signals, where the bandwidth is, for example, the width of the frequency of the PRB. REs occupied by the non-zero power DMRS are REs (gray REs) at positions of 6 th, 7 th and 13 th OFDM (from left to right) symbols on the 2 nd, 7 th and 12 th subcarriers (from bottom to top) of the second PRB pair (from bottom to top), and REs occupied by the zero power DMRS are REs (gray square REs) at positions of 6 th, 7 th and 13 th and 14 th OFDM symbols on the 2 nd, 7 th and 12 th subcarriers (from bottom to top) of the first PRB pair (from bottom to top).

Alternatively, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

Alternatively, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

Optionally, in the at least one candidate demodulation pilot pattern, the time interval occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on the frequency bandwidth where the adjacent demodulation pilot signals are located is different; the time interval is a first time interval; and/or the number of the groups of groups,

In at least one candidate demodulation pilot pattern, the frequency bandwidth occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on the time interval of the adjacent demodulation pilot signal is different; the time interval is a first time interval.

Specifically, in the candidate demodulation pilot pattern shown in fig. 11, REs occupied by the non-zero power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM symbols on the 2 nd and 12 th subcarriers, and REs (gray REs) at positions of 13 th and 14 th OFDM symbols on the 7 th subcarrier; the REs occupied by the zero-power DMRS are REs (gray square REs) at positions of 6 th and 7 th OFDM symbols on the 7 th subcarrier, and REs (gray square REs) at positions of 13 th and 14 th OFDM symbols on the 2 nd and 12 th subcarriers. Namely, the time interval occupied by the non-zero power DMRS on the subcarriers where the adjacent demodulation pilot signals are located, such as 2 and 7, is the time length of a first time slot and the time length of a second time slot respectively, the time interval occupied by the zero power DMRS is the time length of the second time slot and the time length of the first time slot respectively, the time intervals are different, and the time interval at the moment is the time slot; or, the non-zero power and zero power DMRS occupy different subcarriers on adjacent slots. The REs occupied by the non-zero power DMRS and the physical resource element REs occupied by the zero power DMRS in the candidate demodulation pilot pattern as shown in fig. 12 are the exact opposite of those in fig. 11, i.e., the REs occupied by the non-zero power DMRS in fig. 12 correspond to the REs occupied by the zero power DMRS in fig. 11, and the REs occupied by the zero power DMRS in fig. 12 correspond to the REs occupied by the non-zero power DMRS in fig. 11.

This increases the time sampling relative to the candidate demodulation pilot patterns in fig. 3 and 4, and improves the performance of channel estimation.

The DMRS multiplexing method may be as follows: with the configuration in fig. 11 and 12, MU MIMO multiplexing can be performed by 4 users, i.e., multiplexing can be performed by 8 users in total, UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE8. Dividing UE1, UE2, UE5, UE6 into a group, and transmitting demodulation pilot signals by adopting the configuration mode shown in fig. 11, namely, UE1, UE2, UE5, UE6 adopting REs at positions of 6 th and 7 th OFDM symbols on the 2 nd and 12 th subcarriers and REs at positions of 13 th and 14 th OFDM symbols on the 7 th subcarriers; The UE3, UE4, UE7, UE8 are grouped into a group in the configuration shown in fig. 12, contrary to fig. 11, that is, UE3, UE4, UE7, UE8 all transmit demodulation pilot signals using REs at positions of 13 th and 14 th OFDM symbols on the 2 nd and 12 th subcarriers and REs at positions of 6 th and 7 th OFDM symbols on the 7 th subcarriers. UE1 corresponds to the orthogonal spreading codes (1, 1) on the 2 nd and 12 th subcarriers and corresponds to the orthogonal spreading codes (1, 1) on the 7 th subcarrier, and the scrambling codes are generated according to nscid 0; UE2 corresponds to orthogonal spreading codes (1, -1) on the 2 nd and 12 th subcarriers and to orthogonal spreading codes (1, -1) on the 7 th subcarrier, UE2 is completely orthogonal to UE1, and the same scrambling code is generated according to nscid. UE5 and UE6 are respectively the same as the orthogonal spreading codes corresponding to UE1 and UE2, and scrambling codes are generated according to nscid; so UE5 and UE6 are perfectly orthogonal. The orthogonal spreading codes used by UE1 and UE5 and by UE2 and UE6 are the same but the scrambling codes are different, and interference is not generated; the (1, 1) spreading codes corresponding to UE1 and UE5 indicate that two REs of the 6 th and 7 th OFDM symbols on the subcarriers 2, 12 where the pilot is located are spread with (1, 1), and two REs of the 13 th and 14 th OFDM symbols on the subcarrier 7 where the pilot is located are spread with (1, 1), and UE2 and UE6 are similar to UE1 and UE 5. UE3 corresponds to orthogonal spreading codes (1, 1) on the 2 nd and 12 th subcarriers, corresponds to orthogonal spreading codes (1, 1) on the 7 th subcarrier, the scrambling code is generated according to nscid, UE4 corresponds to orthogonal spreading codes (1, -1) on the 2 nd and 12 th subcarriers, corresponds to orthogonal spreading codes (1, -1) on the 7 th subcarrier, UE4 is fully orthogonal to UE3, and the scrambling code is generated according to nscid 0. UE7 and UE8 are respectively the same as the orthogonal spreading codes corresponding to UE3 and UE4, and scrambling codes are generated according to nscid; so UE7 and UE8 are perfectly orthogonal. The orthogonal spreading codes used by UE3 and UE7 and the orthogonal spreading codes used by UE4 and UE8 are the same but the scrambling codes are different, so that interference is not generated; The (1, 1) spreading codes corresponding to UE3 and UE7 indicate that two REs of the 13 th and 14 th OFDM symbols on the subcarriers 2, 12 where the pilot is located are spread with (1, 1), and two REs of the 6 th and 7 th OFDM symbols on the subcarrier 7 where the pilot is located are spread with (1, 1), and UE4 and UE8 are similar to UE3 and UE 7. The RE occupied by the non-zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE3, the UE4, the UE7 and the UE8 cannot generate interference to the pilots of the UE1, the UE2, the UE5 and the UE 6; The REs occupied by the zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 are the same as the REs occupied by the non-zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE1, the UE2, the UE5 and the UE6 cannot generate interference to the pilots of the UE3, the UE4, the UE7 and the UE 8.

There may be 6 and 7 user multiplexes, similar to the first embodiment of the method, and will not be described here again.

According to the embodiment, the positions of the REs occupied by the non-zero power demodulation pilot signals in at least one candidate demodulation pilot pattern correspond to the positions of the REs occupied by the zero power demodulation pilot signals in the rest at least one candidate pilot pattern, so that different demodulation pilot patterns are configured for different first network devices, interference to other first network devices is avoided, the number of multiplexing users can be increased, and the problem that the configuration of the DMRS in the prior art cannot meet the pilot multiplexing of the increased users is solved.

Fig. 13 is a schematic diagram of a candidate demodulation pilot pattern according to a third embodiment of the method of the present invention. Based on the first and second embodiments of the method, in a first implementation manner in this embodiment:

in at least one candidate demodulation pilot pattern, the time intervals occupied by all non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

In at least one candidate demodulation pilot pattern, the time intervals occupied by all zero power demodulation pilot signals are the same; the time interval is a first time interval.

Specifically, the at least one candidate demodulation pilot pattern may be a candidate demodulation pilot pattern as shown in fig. 3 and 4, where all non-zero power demodulation pilot signals occupy the same time slot, and all zero power demodulation pilot signals occupy the same time slot, i.e. the first time interval may be the time length of the time slot.

Optionally, in the at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in the first frequency bandwidth; the time interval is a second time interval, which is a smaller time interval than the first time interval.

Optionally, in the at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the zero-power demodulation pilot signals in the same time interval are equally distributed in the first frequency bandwidth, and the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

Specifically, the candidate demodulation pilot patterns shown in fig. 3 and 4 may be adopted in the above case, where the frequency bandwidths occupied by the non-zero power demodulation pilot signals or the zero power demodulation pilot signals in the same time interval (for example, the time length of the same time slot) are distributed at equal intervals in a first frequency bandwidth (for example, the frequency width of the subcarrier), where the first frequency bandwidth may be the frequency width of the PRB, that is, the frequency width of the PRB is equal, and the interval is 5 subcarriers, which is not described herein.

The second time interval is smaller than the first time interval, and the second time interval is, for example, a time length of an OFDM symbol, and the first time interval is, for example, a time length of a unit slot.

In a second implementation manner of this embodiment:

and in at least one candidate demodulation pilot frequency pattern, the frequency bandwidth occupied by the non-zero power demodulation pilot frequency signals is the same.

And in at least one candidate demodulation pilot frequency pattern, the frequency bandwidth occupied by the zero power demodulation pilot frequency signals is the same.

Specifically, at least one candidate demodulation pilot pattern may be a candidate demodulation pilot pattern as shown in fig. 6, all subcarriers occupied by non-zero power demodulation pilot signals are the same, at least one candidate demodulation pilot pattern may be a candidate demodulation pilot pattern as shown in fig. 7, all subcarriers occupied by zero power demodulation pilot signals are the same, that is, the frequency bandwidth may be the frequency width of the subcarriers; or as shown in fig. 6 and 7, the non-zero power demodulation pilot signal and the zero power demodulation pilot signal occupy the same frequency width of the PRB pair.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals in the same frequency bandwidth are distributed at equal intervals in a third time interval; the third time interval is a time interval greater than the first time interval.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals in the same frequency bandwidth are distributed at equal intervals in a third time interval; the third time interval is a time interval greater than the first time interval.

Specifically, as shown in fig. 6 and 10, the candidate demodulation pilot patterns may be adopted, where the time intervals occupied by the non-zero power demodulation pilot signals or the zero power demodulation pilot signals within the same frequency bandwidth (for example, the frequency width of the subcarriers and the frequency width of the PRB pair) are equally spaced within a third time interval (for example, the time length of a unit subframe), that is, the time intervals are equally spaced within the subframe, and the interval is 6 symbols; the third time interval is a time interval that is greater than the first time interval (e.g., the time length of a time slot). And will not be described in detail herein.

The third time interval is larger than the first time interval, and the third time interval is, for example, a time length of a unit subframe, and includes a time length of two unit slots, and the first time interval is, for example, a time length of a unit slot.

In a third implementation manner in this embodiment:

In at least one candidate demodulation pilot pattern, the time intervals occupied by the non-zero power demodulation pilot signals on the frequency bandwidths of adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the number of the groups of groups,

Optionally, in at least one candidate demodulation pilot pattern, the time intervals occupied by the zero-power demodulation pilot signals on the frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the number of the groups of groups,

Specifically, the above case may employ candidate demodulation pilot patterns as shown in fig. 11 and 12, where the non-zero power demodulation pilot signals or the zero power demodulation pilot signals occupy different time intervals over the frequency bandwidth (e.g., the frequency width of the subcarrier) in which the adjacent demodulation pilot signals are located; the time interval is a first time interval, for example, a time length of a unit time slot; and/or the frequency bandwidth (e.g., the frequency width of a subcarrier) occupied by the non-zero power demodulation pilot signal or the zero power demodulation pilot signal over the time interval in which the adjacent demodulation pilot signal is located is different; the time interval is a first time interval, for example, a time length of a unit time slot.

As shown in fig. 11, the REs occupied by the non-zero power DMRS are the REs (gray REs) at the positions of the 6 th and 7 th OFDM symbols on the 2 nd and 12 th subcarriers, and the REs (gray REs) at the positions of the 13 th and 14 th OFDM symbols on the 7 th subcarrier, that is, the time intervals occupied by the non-zero power DMRS at the subcarriers where adjacent demodulation pilot signals are located, such as 2 and 7, are the REs at the positions of the 6 th and 7 th OFDM symbols of the first slot and the REs at the positions of the 13 th and 14 th OFDM symbols of the second slot, and the time intervals occupied by the non-zero power DMRS at the positions of the 13 th and 14 th OFDM symbols of the second slot and the REs at the positions of the 6 th and 7 th OFDM symbols of the first slot, respectively; the REs occupied by the zero-power DMRS are REs (gray square REs) at positions of 6 th and 7 th OFDM symbols on the 7 th subcarrier, and REs (gray square REs) at positions of 13 th and 14 th OFDM symbols on the 2 nd and 12 th subcarriers. Namely, the time interval occupied by zero power DMRS on the subcarriers of 2 and 7 where adjacent demodulation pilot signals are located is RE on the 13 th and 14 th OFDM symbols of the second time slot and RE on the 6 th and 7 th OFDM symbols of the first time slot, and the time interval occupied by zero power DMRS on the subcarriers 7 and 12 is RE on the 6 th and 7 th OFDM symbols of the first time slot and RE on the 13 th and 14 th OFDM symbols of the second time slot, namely, the time intervals on the subcarriers where adjacent demodulation pilot signals are located are different; or, the subcarriers occupied by the non-zero power DMRS on the adjacent time slots are different, and the subcarriers occupied by the zero power DMRS on the adjacent time slots are different.

Optionally, in the at least one candidate demodulation pilot pattern, the time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and the occupied frequency bandwidths are distributed at equal intervals.

Optionally, in at least one candidate demodulation pilot pattern, the time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and the occupied frequency bandwidths are distributed at equal intervals.

Specifically, as shown in the candidate demodulation pilot pattern in fig. 13, the time intervals occupied by the non-zero power demodulation pilot signal or the zero power demodulation pilot signal are distributed at equal intervals, the occupied frequency bandwidth is distributed at equal intervals, the time intervals are for example, the time length of a unit OFDM symbol, and the frequency bandwidth is for example, the frequency width of a unit subcarrier.

REs occupied by non-zero power DMRS are REs (gray REs) at positions of 7 th and 14 th OFDM (left to right) symbols on 2 nd, 7 th and 12 th subcarriers (from bottom to top in the figure), and REs occupied by zero power DMRS are REs (gray square REs) at positions of 6 th and 13 th OFDM symbols on 2 nd, 7 th and 12 th subcarriers; the OFDM symbols occupied by the non-zero power DMRS and the zero power DMRS are distributed at equal intervals in the time length of a unit subframe, and the intervals are 6 OFDM symbols; the non-zero power DMRS and the subcarriers occupied by the zero power DMRS are distributed at equal intervals within the width of the frequency of the PRB, and the intervals are 5 subcarriers.

Optionally, the at least two candidate pilot patterns are sent to the first network device by dynamic signaling or higher layer signaling.

Optionally, the dynamic signaling or higher layer signaling is cell specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user specific.

Optionally, one pilot pattern of the at least two candidate pilot patterns is sent to the first network device by dynamic signaling or higher layer signaling.

Specifically, cell-specific refers to the fact that the pilot patterns sent by the network device to users in the same cell are the same, user group-specific refers to the fact that the pilot patterns sent by the network device to users in the same user group are the same, and user-specific refers to the fact that the pilot patterns sent by the network device to different users are different.

In the fourth embodiment of the demodulation pilot signal configuration method of the present invention, the execution body of the present embodiment may be a first network device, for example, a base station, a user equipment, or other network devices. The scheme of the embodiment is applied between the second network equipment and the first network equipment to carry out the configuration of the demodulation pilot signals. The method of the embodiment can comprise the following steps:

Specifically, as shown in fig. 3 and 4, two candidate demodulation pilot patterns are shown, the network device determines one of at least two candidate demodulation pilot patterns with the same port number, maps the demodulation pilot signal to the demodulation pilot pattern, and the port number is equal to the number of layers of the data stream; the candidate demodulation pilot pattern refers to a demodulation pilot pattern used when the base station allocates a single physical resource block to the first network device to perform channel estimation on the PRB pair. Each candidate demodulation pilot pattern contains a plurality of REs, gray and gray grid REs being REs occupied by the demodulation pilot signal, and REs in diagonal line portions representing common pilots. The port number refers to the number of logical antenna ports and is equal to the number of layers of the data stream.

The first network device receives the demodulation pilot signals mapped to the candidate demodulation pilot patterns by the second network device and configuration information of the demodulation pilot signals, wherein the configuration information of the demodulation pilot signals indicates:

Spreading codes; or (b)

At least one of the scrambling code information.

Optionally, the at least two candidate demodulation pilot patterns with the same port number are different, including:

Optionally, in the at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal and a time interval occupied by at least one zero power demodulation pilot signal are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal and a frequency bandwidth occupied by the zero power demodulation pilot signal are also different.

Optionally, in the at least one candidate demodulation pilot pattern, the time intervals occupied by all the non-zero power demodulation pilot signals are different from the time intervals occupied by all the zero power demodulation pilot signals.

Optionally, in the at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by all the non-zero power demodulation pilot signals are different from the frequency bandwidths occupied by all the zero power demodulation pilot signals.

Optionally, in the at least one candidate demodulation pilot pattern, the time intervals occupied by the non-zero power demodulation pilot signal and the zero power demodulation pilot signal on the frequency bandwidth where the adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

Optionally, in at least one candidate demodulation pilot pattern, all time intervals occupied by the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

Optionally, in the at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

Optionally, in at least one candidate demodulation pilot pattern, the time intervals occupied by the non-zero power demodulation pilot signals on the frequency bandwidths where the adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the number of the groups of groups,

Optionally, in at least one candidate demodulation pilot pattern, all time intervals occupied by the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

Optionally, in the at least one candidate demodulation pilot pattern, the frequency bandwidth occupied by the zero-power demodulation pilot signals is the same.

Optionally, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

Optionally, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

Optionally, the first network device receives the at least two candidate pilot patterns sent by the second network device through dynamic signaling or higher layer signaling.

Optionally, the first network device is a user equipment, and the second network device is a base station; or alternatively, the first and second heat exchangers may be,

Specifically, the technical scheme of the invention can be used for transmitting and receiving demodulation pilot patterns between network equipment and user equipment and between network equipment and network equipment. Optionally, the dynamic signaling or higher layer signaling is cell specific; or alternatively, the first and second heat exchangers may be,

The dynamic signaling or higher layer signaling is user specific.

Optionally, the first network device receives one pilot pattern of the at least two candidate pilot patterns transmitted by the second network device through dynamic signaling or higher layer signaling.

In this embodiment, a first network device obtains a demodulation pilot pattern according to the received demodulation pilot configuration information, and receives a demodulation pilot signal according to the corresponding demodulation pilot pattern; the demodulation pilot frequency pattern is one of at least two candidate demodulation pilot frequency patterns with the same port number, and the port number is equal to the layer number of the data stream; at least two candidate demodulation pilot patterns with the same port number are different, and at least one candidate demodulation pilot pattern comprises physical resource element RE occupied by a non-zero power demodulation pilot signal and physical resource element RE occupied by a zero power demodulation pilot signal, so that different demodulation pilot patterns are configured for different first network devices, interference to other first network devices is avoided, the number of multiplexing users can be increased, and the problem that the configuration of DMRS in the prior art cannot meet the pilot multiplexing of the increased users is solved.

Fig. 14 is a schematic structural diagram of a second network device according to the first embodiment of the present invention. As shown in fig. 14, the second network device 140 provided in this embodiment includes: a mapping module 1401 and a transmitting module 1402; the mapping module 1401 is configured to determine one of at least two candidate demodulation pilot patterns with the same port number, and map a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, where the port number is equal to the number of layers of a data stream; wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one candidate demodulation pilot pattern comprises physical resource element RE occupied by a non-zero power demodulation pilot signal and physical resource element RE occupied by a zero power demodulation pilot signal;

a sending module 1402, configured to send the mapped demodulation pilot signal and configuration information of the demodulation pilot signal to a first network device.

The dynamic signaling or higher layer signaling is user specific.

The network device of the present embodiment may be used to execute the technical solutions described in any one of the first to third embodiments of the method, and its implementation principle and technical effects are similar, and are not described herein again.

Fig. 15 is a schematic structural diagram of a first network device according to an embodiment of the present invention. As shown in fig. 15, the first network device 150 provided in this embodiment includes: an acquisition module 1501; wherein, the obtaining module 1501 is configured to obtain a demodulation pilot pattern according to the received demodulation pilot configuration information, and receive a demodulation pilot signal according to the corresponding demodulation pilot pattern; the demodulation pilot frequency pattern is one of at least two candidate demodulation pilot frequency patterns with the same port number, and the port number is equal to the layer number of the data stream;

Optionally, the obtaining module 1501 is specifically configured to: the at least two candidate pilot patterns sent by the second network device through dynamic signaling or high-layer signaling are received.

The dynamic signaling or higher layer signaling is user specific.

Optionally, the obtaining module 1501 is specifically configured to: one pilot pattern of the at least two candidate pilot patterns transmitted by the second network device through dynamic signaling or higher layer signaling is received.

The first network device of the present embodiment may be used to execute the technical solution described in the fourth embodiment of the method, and its implementation principle and technical effects are similar, and are not described herein again.

Fig. 16 is a schematic structural diagram of a second network device according to the second embodiment of the present invention. As shown in fig. 16, the second network device 160 provided in this embodiment includes a processor 1601 and a memory 1602. The second network device 160 may also include a transmitter 1603, a receiver 1604. The transmitter 1603 and the receiver 1604 may be coupled to the processor 1601. The transmitter 1603 is configured to transmit data or information, the receiver 1604 is configured to receive data or information, the memory 1602 stores execution instructions, when the second network device 160 is running, the processor 1601 communicates with the memory 1602, and the processor 1601 invokes the execution instructions in the memory 1602 to execute the technical scheme described in any one of the first to third embodiments of the method, and its implementation principle and technical effect are similar and are not repeated here.

Fig. 17 is a schematic structural diagram of a second embodiment of the first network device of the present invention. As shown in fig. 17, the first network device 170 provided in this embodiment includes a processor 1701 and a memory 1702. The first network device 170 may also include a transmitter 1703, a receiver 1704. The transmitter 1703 and receiver 1704 may be coupled to the processor 1701. The transmitter 1703 is configured to send data or information, the receiver 1704 is configured to receive the data or information, the memory 1702 stores execution instructions, when the first network device 170 is running, the processor 1701 communicates with the memory 1702, and the processor 1701 invokes the execution instructions in the memory 1702 to execute the technical scheme described in the fourth embodiment of the method, so that the implementation principle and the technical effect are similar, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and the division of the units or modules is merely a logical function division, and there may be other manners of division in actual implementation, e.g., multiple units or modules may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, indirect coupling or communication connection of devices or modules, electrical, mechanical, or other form.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. An information transmission method, comprising:

Determine a demodulation pilot pattern from at least two candidate demodulation pilot patterns having the same number of ports, and map a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, wherein the number of ports is equal to the number of layers of the data stream;

The at least two candidate demodulation pilot patterns having the same number of ports are different, and the demodulation pilot pattern includes a first physical resource unit and a second physical resource unit.

The first physical resource unit is a physical resource unit occupied by a non-zero power demodulation pilot signal of a first user equipment, and the second physical resource unit is a physical resource unit that does not include a non-zero power demodulation pilot signal and data of the first user equipment;

The mapped demodulation pilot signal and configuration information of the demodulation pilot signal are sent to the first user equipment.

2. The method according to claim 1, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

The second physical resource unit in the demodulation pilot pattern corresponds to the position of the physical resource unit occupied by the non-zero power demodulation pilot signal of the third user equipment in the remaining at least one candidate pilot pattern, and the third user equipment is a user equipment different from the first user equipment.

3. The method according to claim 1, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

In the demodulation pilot pattern, positions of all the first physical resource units and positions of all the second physical resource units correspond to positions of physical resource units occupied by non-zero power demodulation pilot signals of a third user equipment in at least one remaining candidate pilot pattern.

4 . The method according to claim 1 , wherein in the demodulation pilot pattern, a frequency bandwidth occupied by all the first physical resource units is different from a frequency bandwidth occupied by all the second physical resource units.

5. The method according to claim 4 is characterized in that, in the demodulation pilot pattern, the time intervals occupied by all the first physical resource units are the same; and the time interval is a first time interval.

6. The method according to any one of claims 1-5, characterized in that the at least two candidate demodulation pilot patterns are sent to the first user equipment via dynamic signaling or high-layer signaling.

7. The method according to claim 6, characterized in that the dynamic signaling or high-layer signaling is cell-specific; or,

The dynamic signaling or high-layer signaling is user group specific; or,

The dynamic signaling or high-layer signaling is user-specific.

8. The method according to claim 7 is characterized in that one demodulation pilot pattern of the at least two candidate demodulation pilot patterns is sent to the first user equipment through dynamic signaling or high-layer signaling.

9. An information transmission method, comprising:

Obtaining a demodulation pilot pattern according to the received demodulation pilot configuration information, and receiving a demodulation pilot signal according to the corresponding demodulation pilot pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns having the same number of ports, and the number of ports is equal to the number of layers of the data stream;

Among them, the at least two candidate demodulation pilot patterns with the same number of ports are different, and the demodulation pilot pattern includes a first physical resource unit and a second physical resource unit, the first physical resource unit is a physical resource unit occupied by a non-zero power demodulation pilot signal of a first user equipment, and the second physical resource unit is a physical resource unit that does not contain a non-zero power demodulation pilot signal and data of the first user equipment.

10. The method according to claim 9, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

11. The method according to claim 9, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

In the demodulation pilot pattern, positions occupied by all the first physical resource units and positions of all the second physical resource units correspond to positions of physical resource units occupied by non-zero power demodulation pilot signals of third user equipment in at least one remaining candidate pilot pattern.

12 . The method according to claim 9 , wherein in the demodulation pilot pattern, a frequency bandwidth occupied by all the first physical resource units is different from a frequency bandwidth occupied by all the second physical resource units.

13. The method according to claim 12 is characterized in that, in the demodulation pilot pattern, the time intervals occupied by all the first physical resource units are the same; and the time interval is a first time interval.

14. The method according to any one of claims 9 to 13, characterized in that the first user equipment receives the at least two candidate demodulation pilot patterns sent via dynamic signaling or high-layer signaling.

15. The method according to claim 14, characterized in that the dynamic signaling or high-layer signaling is cell-specific; or,

The dynamic signaling or high-layer signaling is user group specific; or,

The dynamic signaling or high-layer signaling is user-specific.

16. The method according to claim 15, characterized in that the first user equipment receives a demodulation pilot pattern among the at least two candidate demodulation pilot patterns sent through dynamic signaling or high-layer signaling.

17. An information transmission device, comprising:

A processor, configured to determine a demodulation pilot pattern from at least two candidate demodulation pilot patterns having the same number of ports, and map a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, wherein the number of ports is equal to the number of layers of the data stream;

The transmitter is used to send the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first user equipment.

18. The apparatus according to claim 17, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

19. The device according to claim 17, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

In the demodulation pilot pattern, positions of all the first physical resource units and positions of all the second physical resource units correspond to physical resource unit positions occupied by non-zero power demodulation pilot signals of a third user equipment in at least one remaining candidate pilot pattern.

20. The device according to claim 17, characterized in that, in the demodulation pilot pattern, a frequency bandwidth occupied by all the first physical resource units is different from a frequency bandwidth occupied by all the second physical resource units.

21. The device according to claim 20 is characterized in that, in the demodulation pilot pattern, the time interval occupied by all the first physical resource units is the same; and the time interval is a first time interval.

22. The apparatus according to any one of claims 17-21, characterized in that the at least two candidate demodulation pilot patterns are sent to the first user equipment via dynamic signaling or high-layer signaling.

23. The apparatus according to claim 22, wherein the dynamic signaling or high-layer signaling is cell-specific; or,

The dynamic signaling or high-layer signaling is user group specific; or,

The dynamic signaling or high-layer signaling is user-specific.

24. The apparatus according to claim 23, characterized in that one of the at least two candidate demodulation pilot patterns is sent to the first user equipment through dynamic signaling or high-layer signaling.

25. An information transmission device, comprising:

A processor, configured to obtain a demodulation pilot pattern according to the received demodulation pilot configuration information, and receive a demodulation pilot signal according to the corresponding demodulation pilot pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns having the same number of ports, where the number of ports is equal to the number of layers of the data stream;

26. The apparatus according to claim 25, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

27. The apparatus according to claim 25, wherein the at least two candidate demodulation pilot patterns having the same number of ports are different, comprising:

In the demodulation pilot pattern, positions occupied by all the first physical resource units and positions occupied by all the second physical resource units correspond to positions occupied by non-zero power demodulation pilot signals of a third user equipment in at least one remaining candidate pilot pattern.

28. The device according to claim 25, characterized in that, in the demodulation pilot pattern, a frequency bandwidth occupied by all the first physical resource units is different from a frequency bandwidth occupied by all the second physical resource units.

29. The device according to claim 28 is characterized in that, in the demodulation pilot pattern, the time interval occupied by all the first physical resource units is the same; and the time interval is a first time interval.

30. The apparatus according to any one of claims 25-29, characterized in that the first user equipment receives the at least two candidate demodulation pilot patterns sent via dynamic signaling or high-layer signaling.

31. The apparatus according to claim 30, wherein the dynamic signaling or high-layer signaling is cell-specific; or,

The dynamic signaling or high-layer signaling is user group specific; or,

The dynamic signaling or high-layer signaling is user-specific.

32. The apparatus according to claim 31 is characterized in that the first user equipment receives a demodulation pilot pattern among the at least two candidate demodulation pilot patterns sent via dynamic signaling or high-layer signaling.

33. A communication device, comprising:

A processor and a memory, wherein the memory stores execution instructions. When the communication device is running, the processor communicates with the memory, and the processor executes the execution instructions so that the communication device executes the method according to any one of claims 1 to 8.

34. A communication device, comprising:

A processor and a memory, wherein the memory stores execution instructions. When the communication device is running, the processor communicates with the memory, and the processor executes the execution instructions so that the communication device executes the method as described in any one of claims 9 to 16.

35. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium; when the computer program is executed, the method according to any one of claims 1 to 8 or any one of claims 9 to 16 is implemented.