CN102387528B - A kind of interferometry information notice method, interference detecting method, base station and terminal - Google Patents
A kind of interferometry information notice method, interference detecting method, base station and terminal Download PDFInfo
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Abstract
The present invention provides a kind of interferometry information notice method, including：Base station notifies the configuration information and N of terminal M set channel measurement pilot frequencies to cover the configuration information of interferometry reference pilot, and M, N is natural number.The present invention also provides a kind of interference detecting method, including：Terminal receives the configuration information for the M set channel measurement pilot frequencies that base station is sent and the configuration information of N set interferometry reference pilots, K kinds hypothesis is obtained according to the M transmitting situations for covering the useful signal transmitting situation of the corresponding transmission node of channel measurement pilot frequency and the interference information of the corresponding transmission node of N set interferometry reference pilots, the interference information under the K kinds are assumed is calculated according to interferometry reference pilot, further obtain the channel quality information under the K kinds are assumed and feed back to the base station, the K is natural number.The present invention also provides a kind of base station and terminal.The present invention measures interference information by interference channel, and interferometry is more accurate.
Description
Technical Field
The invention relates to the field of communication, in particular to a method for notifying interference measurement information, an interference measurement method, a base station and a terminal in a communication system.
Background
In a Long Term Evolution system (LTE), Channel State Information (CSI), which is Information reflecting a downlink physical Channel State, mainly includes 3 parts of contents: channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI).
The CQI is an index for measuring the quality of the downlink channel. In the 3GPP TS 36.213 protocol, CQIs are represented by integer values of 0 to 15, which respectively represent different CQI levels, and the different CQIs correspond to respective Modulation and Coding Schemes (MCS), and are divided into 16 cases, which can be represented by 4-bit information, as shown in table 1.
Table 1: relation between CQI index and MCS
In LTE, the implications of feedback of CQI are: user Equipment (UE) selects a suitable transport block modulation coding level according to the channel quality and recommends the selected transport block modulation coding level to the base station, so that the base station can perform modulation coding according to the information to exert the transmission capability of the channel to the best extent.
From another angle, the CQI can also be understood as the quantization of channel quality information, if the quality is good, a higher-order modulation coding mode can be supported, and higher speed can be obtained; if the quality is poor, the transmission can be carried out only in a modulation coding mode with lower order, so as to ensure the robustness of the transmission. In Multiple-Input Multiple-Output (MIMO), the CQI generally recommended is assumed as follows:
(1) the base station uses the recommended RI as the number of layers of spatial multiplexing to simultaneously transmit RI data and uses a layer mapping mode specified in a protocol;
(2) precoding the signal by using the recommended PMI;
(3) interference and noise are measured by the UE.
And (3) calculating the CQI according to the Signal to Interference plus Noise Ratio (SINR) obtained after the actual receiving algorithm used by the terminal and processed by the receiving algorithm according to the receiving algorithms (1), (2) and (3).
There are more sophisticated algorithms for RI, PMI and CQI calculation, such as using the capacity maximization criterion to select the best RI, PMI and CQI. In general, RI/PMI/CQI is not selected independently of each other, and the selection algorithm is generally a uniform selection. The accuracy of RI/PMI/CQI calculation and selection is affected by 2 aspects: channel measurements and interference noise measurements.
The Channel measurement may be based on Common Reference Signal (CRS) or Channel State Information measurement reference signal (CSI-RS) in LTE/LTE-A system
At present, due to better pilot frequency design, more accurate channel measurement can be carried out through CRS or CSI-RS.
The interference noise measurement is a technical bottleneck, and the wrong interference information may cause that the number of layers is not matched with the actual channel quality condition, for example, only 2 layers can be actually supported, but the error measurement of the interference noise information is misjudged to be capable of supporting 4 layers, which may cause a high error rate. Or, only the low-order coded modulation mode can be actually supported, and if the high-order coded modulation mode can be supported by misjudgment, the error rate is too high. On the contrary, it is possible to support multi-layer and high-order coded modulation, and actually only a few layers and low-order coding modes are used for transmission, resulting in waste of transmission resources.
The measurement of noise is generally relatively simple, as noise is generally generated by the device itself. The interference situation mainly comes from other cells or other nodes, and due to different transmission technologies, e.g. different precodes, of other cells or transmission nodes, the difference of the transmitted signals may cause the interference situation to change. Therefore, the measurement of interference is a technical problem in the prior art.
There are many existing interference measurement methods, mainly including three methods: interference measurement is performed based on CRS, interference measurement is performed based on CSI-RS, and interference measurement is performed based on proprietary demodulation pilot or transmission data.
The idea of interference measurement based on CRS is to use the interference received by CRS as the interference received by Data signal (Data). The method is a mainstream method at present, generally, it is considered that interference conditions of the CRS and data are similar, and since the density of the CRS is high, interference information and information of the reference signal can be distinguished to a certain extent according to the correlation of the channel, so the performance of channel estimation is also relatively good.
Another method is to perform interference measurement according to CSI-RS, and since the CSI-RS density is sparse when performing interference measurement according to CSI-RS, the interference performance is slightly poor, but since the same pattern problem of CRS between cells often exists (due to the higher density), some measured CRS is pilot interference from other cells instead of data interference, so there are some inaccuracies from this point of view. And the CSI-RS does not have the problem because the pilot frequency density is low, so that the CSI-RS can be selected for interference measurement.
A typical method of prior art interference measurement is:
and measuring the interference on the pilot CRS or the CSI-RS, and considering that the interference situation on the data channel is similar to the interference on the CRS or the CSI-RS.
One typical feature is to measure the interference signal, as shown in fig. 1, by the following specific steps:
step 1: performing channel estimation, and reducing the influence of interference noise by using time domain correlation and frequency domain correlation to obtain a more accurate channel H from the service node to the UE;
step 2: obtaining a signal component Hs sent by the service node in the received signal according to pilot frequency data s sent by the service node (TP1) and the estimated channel;
and step 3: and subtracting the signal component Hs sent by the service node from the received signal to calculate interference and noise statistical information.
Yet another approach is:
and carrying out joint processing on the subcarriers on the plurality of subcarriers, carrying out statistical averaging, filtering out useful signals and obtaining residual interference information.
The idea of both methods is to measure the interfering signal. However, in practical systems, there is a problem that the subframe of interference measurement is not equal to the subframe at the time of transmission, and the two subframes are not the same. In general, channel quality measurements (including channel and interference measurements) are made on the nth subframe, while the actual transmission occurs on the (N + a) th subframe. a is typically 10 ms and more. Generally, the channel will not change greatly in a short time, but the interference problem is related to the scheduling situation of TP2, tp3.
Considering the cause of interference variation, one method is to count the interference on N-b-N-a, but this method still cannot solve the problem of interference variation well. As shown in fig. 2, although the 10 subframes are statistically averaged, the interference may still be miscalculated. For example, if the scheduling subframe is a Data (Data) frame, the interference is only half; if the scheduled subframe is a Blank (Blank) frame, the interference is more than calculated. In FIG. 2, D represents Data and B represents Blank.
Therefore, there is a need for improvement in the existing interference measurement method.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an interference measurement information notification method, an interference measurement method, a base station and a terminal, and to solve the problem that the existing interference measurement is not accurate enough.
In order to solve the above problem, the present invention provides an interference measurement information notification method, including:
the base station informs the terminal of the configuration information of M sets of channel measurement pilot frequencies and the configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers.
Further, the method may further have a characteristic that the base station sends the configuration information of the N sets of interference measurement reference pilots to the terminal through a radio network control signaling.
Further, the above method may have the following features, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
The invention also provides an interference measurement method, which comprises the following steps:
a terminal receives configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers, and the configuration information is sent by a base station;
the terminal obtains K hypotheses according to the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilot frequencies and the interference information emission situation of the transmission node corresponding to the N sets of interference measurement reference pilot frequencies, calculates the interference information under the K hypotheses according to the interference measurement reference pilot frequencies, further obtains the channel quality information under the K hypotheses and feeds the channel quality information back to the base station, wherein K is a natural number.
Further, the method may further have the following characteristic that the calculating of the interference information under the K hypotheses according to the interference measurement reference pilot includes:
for each hypothesis, acquiring a channel matrix of an interference channel according to an interference measurement reference pilot frequency corresponding to a transmission node which transmits interference information under the hypothesis, and acquiring the interference information from the transmission node according to the channel matrix.
Further, the above method may have the following features, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies, and N is less than M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
Further, the method may further have a feature that the emission condition of the useful signal of the transmission node corresponding to the M sets of channel measurement pilots includes the following 2M-1 of any one or more of:
each of the transmission nodes A1-AM transmits a useful signal or does not transmit a useful signal, for a total of 2MThe transmission condition is eliminated, and the condition that all transmission nodes do not transmit useful signals is eliminated, and the total is 2M-1 useful signal case;
A1-AM are the transmission nodes corresponding to the M sets of channel measurement reference pilot frequency respectively.
Further, the method may further have a feature that the transmitting condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots includes the following 2NAny one or more of the following:
each transmission node in the transmission node B1-BN transmits interference information or does not transmit interference information, and the interference information are combined to obtain 2 in totalNA case of transmission of interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the method may further have the following characteristic that the transmission conditions of the interference information of the transmission nodes corresponding to the N sets of interference measurement reference pilots include at least two types:
each of the transmission nodes B1-BN transmits interference information;
each of the transmission nodes B1-BN does not transmit interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the method may further have the following characteristic that the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots at least includes:
each of the transmission nodes B1-BN transmits interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the method may further have the following characteristic that the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots at least includes:
each of the transmission nodes B1-BN does not transmit interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Furthermore, the method can also have the following characteristics that the interference measurement reference pilot frequency is dynamically defined under each useful signal transmission condition.
Furthermore, the method may further have a characteristic that the transmission node that transmits the useful signal does not transmit information on a time-frequency resource location corresponding to the time-frequency resource location occupied by the interference measurement reference pilot.
The present invention also provides a base station, configured to: and informing the terminal of the configuration information of M sets of channel measurement pilot frequencies and the configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers.
Further, the above base station may further have the following features, and the base station is configured to: and sending the configuration information of the N sets of interference measurement reference pilot frequencies to the terminal through a wireless network control signaling.
Further, the base station may further have the following characteristics, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
The invention also provides a terminal, which comprises a receiving unit, an interference measuring unit and a feedback unit, wherein:
the receiving unit is used for: receiving configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers, and the configuration information is sent by a base station;
the interference measurement unit is configured to: acquiring K hypotheses according to the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilot frequencies and the interference information emission situation of the transmission node corresponding to the N sets of interference measurement reference pilot frequencies, calculating the interference information under the K hypotheses according to the interference measurement reference pilot frequencies, and further acquiring the channel quality information under the K hypotheses, wherein K is a natural number;
the feedback unit is configured to feed back the channel quality information obtained by the interference measurement unit to the base station.
Further, the terminal may further have the following characteristics, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies, and N is less than M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
Further, the terminal may further have the following characteristic that the interference measurement unit calculates the interference information under the K hypotheses according to the interference measurement reference pilot frequency, including:
for each hypothesis, acquiring a channel matrix of an interference channel according to an interference measurement reference pilot frequency corresponding to a transmission node which transmits interference information under the hypothesis, and acquiring the interference information from the transmission node according to the channel matrix.
Further, the above terminal may also have the following features,
the interference measurement unitThe obtained emission situation of the useful signals of the transmission nodes corresponding to the M sets of channel measurement pilots comprises the following 2M-1 of any one or more of:
each of the transmission nodes A1-AM transmits a useful signal or does not transmit a useful signal, for a total of 2MThe transmission condition is eliminated, and the condition that all transmission nodes do not transmit useful signals is eliminated, and the total is 2M-1 useful signal case;
A1-AM are the transmission nodes corresponding to the M sets of channel measurement reference pilot frequency respectively.
Further, the terminal may further have a feature that the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit includes the following 2NAny one or more of the following:
each transmission node in the transmission node B1-BN transmits interference information or does not transmit interference information, and the interference information are combined to obtain 2 in totalNA case of transmission of interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the terminal may further have the following characteristics that the transmission conditions of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit include at least two types:
each of the transmission nodes B1-BN transmits interference information;
each of the transmission nodes B1-BN does not transmit interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the terminal may further have the following characteristic that the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least includes:
each of the transmission nodes B1-BN transmits interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the terminal may further have the following characteristic that the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least includes:
each of the transmission nodes B1-BN does not transmit interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Further, the terminal may further have a feature that the interference measurement reference pilot is dynamically defined in each useful signal transmission case.
Furthermore, the terminal may further have a characteristic that the terminal does not send information at a time-frequency resource location corresponding to a time-frequency resource location occupied by the interference measurement reference pilot on a transmission node of the useful signal.
According to the interference measurement method provided by the invention, the interference is obtained through the interference channel, and the method is more accurate than the method for measuring the interference signal. In addition, the invention can feed back the channel quality information of various interference conditions, and the base station can select proper channel quality information to predict the coding modulation mode during transmission according to different scheduling conditions.
Drawings
FIG. 1 is a schematic diagram of a prior art interference measurement;
FIG. 2 is another schematic diagram of a prior art interference measurement;
fig. 3 is a schematic diagram of interference measurement according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of interference measurement according to embodiment 9 of the present invention;
fig. 5 is a schematic diagram of interference measurement according to embodiment 10 of the present invention;
fig. 6 is a schematic diagram of interference measurement according to embodiment 12 of the present invention;
fig. 7 is a block diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the invention provides an interference measurement information notification method, which comprises the following steps:
the base station informs the terminal of the configuration information of M sets of channel measurement pilot frequencies and the configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers.
And the base station sends the configuration information of the N sets of interference measurement reference pilot frequencies to the terminal through a wireless network control signaling.
Wherein, when M > 1: the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection. Of course, there may be no intersection between the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots.
The embodiment of the invention also provides an interference measurement method, which comprises the following steps:
a terminal receives configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers, and the configuration information is sent by a base station;
the terminal obtains K hypotheses according to the useful signal emission conditions of the transmission nodes corresponding to the M sets of channel measurement pilot frequencies and the interference information emission conditions of the transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies, calculates the interference information under the K hypotheses according to the interference measurement reference pilot frequencies, and further obtains and feeds back channel quality information (first channel quality information and second channel quality information) under the K hypotheses to the base station.
And the configuration information of the N sets of interference measurement reference pilot frequencies is notified to the terminal by the base station through RRC signaling.
Wherein the interference information calculated by the interference measurement reference pilot frequency under the K hypotheses includes:
for each hypothesis, acquiring a channel matrix of an interference channel according to an interference measurement reference pilot frequency corresponding to a transmission node which transmits interference information under the hypothesis, and acquiring the interference information from the transmission node according to the channel matrix.
The terminal measures an interference channel HI1..... times HIN at the positions of the N sets of interference measurement reference pilot frequencies, obtains K different interference conditions under the assumption according to the measured interference channel information HI1.... times HIN, and further obtains channel quality information under K different interference conditions.
Wherein, when the UE configures M sets of channel measurement pilot frequencies, M is greater than 1: the N sets of interference measurement reference pilot frequencies can be subsets of M sets of channel measurement reference pilot frequencies, and N is less than M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection. For example, the channel measurement pilot is configured with 1, 2, 3, and the interference measurement reference pilot is 1, 2 in the 3 sets, or the channel measurement pilot is configured with 1, 2 and the interference measurement reference pilot is configured with 2, 3. Of course, there may be no intersection between the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots.
Wherein, when the channel quality measurement and the feedback are respectively performed for the M sets of channel measurement pilots, the definitions of the interference measurement pilots may be different. For example, 1, 2, 3 channels are configured, 2 and/or 3 may be used as interference measurement pilots when measuring the channel quality of 1, and 1 and/or 3 may be used as interference measurement pilots when measuring the channel quality of 2.
Wherein, the emission situation of the useful signal of the transmission node corresponding to the M sets of channel measurement pilots comprises the following 2M-1 of any one or more of:
each of the transmission nodes A1-AM transmits a useful signal or does not transmit a useful signal, for a total of 2MThe transmission condition is eliminated, and the condition that all transmission nodes do not transmit useful signals is eliminated, and the total is 2M-1 useful signal case;
A1-AM are the transmission nodes corresponding to the M sets of channel measurement reference pilot frequency respectively.
Wherein, the transmission condition of the interference information of the transmission nodes corresponding to the N sets of interference measurement reference pilots comprises the following 2NAny one or more of the following:
each transmission node in the transmission node B1-BN transmits interference information or does not transmit interference information, and the interference information are combined to obtain 2 in totalNA case of transmission of interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Wherein, the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots at least includes:
each of the transmission nodes B1-BN transmits interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
If the number of the interference measurement reference pilot frequency is N1 under the condition that some useful information is transmitted, and N1 is less than N, the transmission condition of the interference information of the transmission node corresponding to the interference measurement reference pilot frequency at the moment is 2N1Any one or more of the conditions, in particular which 2N1Transmission corresponding to reference pilot frequency of N sets of interference measurement referencesA transmission condition of interference information of the node.
Wherein, the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots at least includes:
each of the transmission nodes B1-BN does not transmit interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
The transmission conditions of the interference information of the transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies at least comprise two conditions:
each of the transmission nodes B1-BN transmits interference information;
each of the transmission nodes B1-BN does not transmit interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Wherein an assumed interference situation comprises at least that interference from the transmission node Bp is assumed, and no interference from transmission nodes other than Bp in the b1. N, 1, 2.
Wherein the plurality of assumed interference scenarios comprises at least two of the following scenarios:
interference from the B1
Two types of interference from b1.
With interference from Bp, no interference from all transmission nodes except Bp in a BN, P1.. a;
the method comprises the steps that interference from a transmission node corresponding to Bp exists, and interference from all transmission nodes except the Bp in the B1.
No interference from all transmission nodes except Bp in the BN, P ═ N;
the method comprises the steps that interference from transmission nodes corresponding to Bp is avoided, and interference from all transmission nodes corresponding to interference channels except for Bp in a B1..... BN exists, wherein P is 1;
no interference from Bp, there is interference from all transmission nodes except Bp in the BN, P2;
no interference from Bp, there is interference from all transmission nodes except Bp in a BN, P ═ N;
in the time-frequency resource position occupied by the interference measurement pilot frequency, the service node (transmission node sending useful signal) does not send information in the corresponding time-frequency resource position.
Wherein the interference measurement pilot is dynamically defined based on an actually used channel measurement pilot. I.e. the interference measurement reference pilot dynamic definition in each case of useful signal transmission.
The N sets of interference measurement reference pilot frequencies may be specific configuration information or indication information indicating which sets of the M sets of channel measurement reference pilot frequencies are used for interference measurement.
For example, one configuration is as follows: when M sets of channel measurement pilots are 1, 2, 3, and the interference measurement pilots are also 1, 2, 3, the terminal may obtain the following multiple assumptions:
1, transmitting a useful signal, 2 and 3 having interference, or 2 and 3 having no interference, or 2 having interference and 3 having no interference; or, 2 has no interference, 3 has interference;
2, transmitting a useful signal, wherein 1 and 3 have interference, or 1 and 3 have no interference, or 1 has interference and 3 has no interference; or, 1 has no interference and 3 has interference. That is, the interference measurement pilots under each useful signal hypothesis can be dynamically defined.
For another example, M sets of channel measurement pilots are 1, 2, and N sets of interference measurement pilots are 2, 3.
The terminal specifically feeds back the channel quality information under which conditions, may feed back the channel quality information under one or more assumptions notified by the base station according to the notification of the base station, may feed back the channel quality information under one or more assumptions indicated by the pre-configuration through the pre-configuration, and may feed back the channel quality information under all possible assumptions.
Example 1
As shown in fig. 3, the base station configures 3 sets of CSI-RS information to the UE through high-level signaling, and the terminal can obtain the time-frequency resource positions for transmitting the three sets of CSI-RS and the information of the transmission content. One set is used for channel measurement, and the other two sets are used for interference measurement. The terminal can calculate a channel H1 according to the CSI-RS1, and can calculate and obtain H2 and H3 according to the CSI-RS2 and the CSI-RS 3.
The UE may assume that a signal is transmitted on a channel H1, and further assume that there is interference data transmitted on TP2 and interference data transmitted on TP3, and estimate interference from tp4..... TPn according to an interference situation received by CSI-RS1 (at this time, a time-frequency resource location needs to be transmitted on CSI-RS1, and TP2 and TP3 do not transmit any information), so that the terminal may calculate interference from TP2 according to H2, calculate interference from TP3 according to H3, obtain total interference assuming that TP2 is provided in combination with interference of TP4-TPn, obtain total interference in a case that TP3 transmits interference information, and further calculate CQI1 according to information of H1.
Example 2
Similar to example 1, except that: the UE may assume that a signal is transmitted on the channel H1, and further assume that no interference data is transmitted on TP2 and no interference data is transmitted on TP3, and estimate interference from tp4..... TPn according to the interference situation received on CSI-RS1 (at this time, a time-frequency resource location needs to be transmitted on CSI-RS1, and no information is transmitted by TP2 and TP 3), so that the terminal may obtain total interference under the above assumption only according to interference from TP4-TPn without considering interference from TP2 and TP3, and further calculate the CQI2 by combining information of H1.
Example 3
Similar to example 1, except that: the UE assumes that a signal is transmitted on a channel H1, and further assumes that there is transmission interference data on TP2 and no transmission interference data on TP3, and estimates interference from tp4..... TPn according to the interference situation received on CSI-RS1 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1, and TP2 and TP3 do not transmit any information), so that the terminal can calculate interference from the source and TP2 according to H2, does not consider interference from TP3, obtains total interference under the above assumption by combining interference from TP4-TPn, and further calculates CQI3 by combining information of H1.
Example 4
Similar to example 1, except that: the UE assumes that a signal is transmitted on a channel H1, and further assumes that there is transmission interference data on TP3 and no transmission interference data on TP2, and estimates interference from tp4..... TPn according to the interference situation received on CSI-RS1 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1, and TP2 and TP3 do not transmit any information), so that the terminal can calculate interference from the source and TP3 according to H3, does not consider interference from TP2, obtains total interference under the above assumption by combining interference from TP4-TPn, and further calculates CQI4 by combining information of H1.
Example 5
For the cases of embodiments 1 to 4, it should be noted that a transmission node corresponding to an interference measurement pilot needs to be configured, and data cannot be sent on a time-frequency resource corresponding to a channel measurement pilot, otherwise interference is repeatedly calculated.
Example 6
The terminal may also calculate two CQIs in embodiments 1, 2, 3, and 4 and feed back the two CQIs. For example, the terminal calculates CQI1 in embodiment 1 and feeds back assuming TP2 and TP3 interference; and, the terminal assumes no interference of TP2 and TP3, calculates CQI2 in embodiment 2 and feeds back.
Example 7
The terminal may also calculate two CQIs in embodiments 1, 2, 3, and 4 and feed back the two CQIs. For example, the terminal assumes TP2 and TP3 interference, calculates CQI1 in embodiment 1 and feeds back; and, the terminal assumes TP2 interference and no TP3 interference, calculates CQI3 in embodiment 3 and feeds back.
Example 8
The terminal may also calculate four CQIs in embodiments 1, 2, 3, and 4 and feed back the four CQIs. Alternatively, the terminal may calculate 3 kinds of CQIs in embodiments 1, 2, 3, and 4, and feed back the 3 kinds of CQIs.
Example 9
As shown in fig. 4, the base station configures 2 sets of CSI-RS information to the UE through a high-level signaling, and the terminal can obtain the time-frequency resource positions for transmitting the 2 sets of CSI-RS and information of transmission contents. Wherein 1 is applied to channel measurement, and the other 1 is applied to interference measurement.
The terminal can calculate a channel H1 according to the CSI-RS1 and obtain H2 according to the CSI-RS 2.
The UE assumes that a signal is transmitted on a channel H1, and further assumes that there is transmission interference data on TP2, and estimates interference from tp3.... times.tpn according to interference conditions received by CSI-RS1 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1, and TP2 does not transmit any information), so that the terminal can calculate interference from the UE and TP2 according to H2, obtain total interference assuming that TP2 has transmission interference information in combination with the interference of TP3-TPn, and further calculate CQI1 in combination with information of H1;
or,
the UE assumes that a signal is transmitted on the channel H1, further, assumes that no interference data is transmitted on the TP2, and estimates interference from the tp3. In this way, the terminal can obtain the total interference under the condition that TP2 does not send interference information only according to the interference of TP3-TPn without considering the interference from TP2, and further calculate and obtain CQI2 by combining the information of H1;
or,
the UE may also calculate CQI1 and CQI2 according to the above method and both feed back.
Example 10
As shown in fig. 5, the base station configures 3 sets of CSI-RS information for the UE through high-level signaling, and the terminal can obtain the time-frequency resource positions for transmitting the 3 sets of CSI-RS and information of transmission contents. Of which 2 are used for channel measurement and 1 is used for interference measurement.
The terminal can calculate a channel H1 according to the CSI-RS1, and can calculate and obtain H2 according to the CSI-RS 2. H3 is calculated according to CSI-RS 3.
The UE may assume that signals are transmitted on channels H1 and H2, and further assume that there is interference data transmitted on TP3, and estimates interference from tp4.... TPn according to interference conditions received by CSI-RS1 or CSI-RS2 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1 or CSI-RS2, and no information is transmitted by TP 3), so that the terminal may calculate interference from the source and TP3 according to H3, obtain total interference assuming that TP3 has interference information to be transmitted in combination with interference of TP4-TPn, and further calculate CQI1 in combination with information of H1 and H2;
or,
the UE may assume that signals are transmitted on channels H1 and H2, and further assume that no interference data is transmitted on TP3, and estimate interference from tp4...... TPn according to interference conditions suffered by CSI-RS1 or CSI-RS2 (at this time, a time-frequency resource location needs to be transmitted on CSI-RS1 or CSI-RS2, and no information is transmitted by TP 3), so that the terminal may obtain total interference assuming that TP3 does not transmit interference information according to interference of TP4-TPn, and further calculate CQI2 by combining information of H1 and H2;
or,
the UE may also calculate CQI1 and CQI2 according to the above method and both feed back.
Example 11
The base station configures 3 sets of CSI-RS information for the UE through high-level signaling, and then the terminal can obtain the time-frequency resource positions sent by the 3 sets of CSI-RS and the information of the sending content. Of which 2 are used for channel measurement and 1 is used for interference measurement. The terminal can calculate a channel H1 according to the CSI-RS1, and can calculate and obtain H2 according to the CSI-RS 2. H3 is calculated according to CSI-RS 3.
The UE may assume that a signal is transmitted on a channel H1, no data is transmitted on a channel H2, and further assume that there is transmission interference data on TP3, and estimates interference from the tp4........ TPn according to the interference situation received by CSI-RS1 or CSI-RS2 (at this time, a time-frequency resource location needs to be transmitted on CSI-RS1 or CSI-RS2, and no information is transmitted by TP 3), so that the terminal may calculate interference from the source and TP3 according to H3, obtain total interference assuming that TP3 has transmission interference information in combination with the interference of TP4-TPn, and further calculate CQI1 in combination with the information of H1;
or,
the UE may assume that a signal is transmitted on a channel H2, no data is transmitted on H1, and further assume that there is interference data transmitted on TP3, and estimates interference from tp4....... TPn according to interference conditions received by CSI-RS1 or CSI-RS2 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1 or CSI-RS2, and the TP3 does not transmit any information), so that the terminal may calculate interference from TP3 according to H3, obtain total interference assuming that the TP3 has interference information to send in combination with the interference of TP4-TPn, and further calculate CQI2 in combination with information of H2;
or,
the UE may assume that a signal is transmitted on a channel H1, no data is transmitted on H2, and further, assume that no interference data is transmitted on TP3, and estimate interference from the tp4........ TPn according to interference conditions suffered by CSI-RS1 or CSI-RS2 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1 or CSI-RS2, and the TP3 does not transmit any information), so that the terminal may obtain total interference assuming that the TP3 has no interference information according to the interference of the TP4-TPn, and further calculate to obtain CQI3 by combining information of H1;
or,
the UE may assume that a signal is transmitted on a channel H2, no data is transmitted on H1, and further, assume that no interference data is transmitted on TP3, and estimate interference from the tp4........ TPn according to interference conditions suffered by CSI-RS1 or CSI-RS2 (at this time, a time-frequency resource position needs to be transmitted on CSI-RS1 or CSI-RS2, and no information is transmitted by TP 3), so that the terminal may obtain total interference assuming that the TP3 does not transmit interference information according to the interference of TP4-TPn, and further calculate CQI4 by combining with the information of H2;
or,
the UE can also calculate any X of CQI1 and CQI2, CQI3 and CQI4 according to the method, and feeds back the X information, wherein X is more than 1 and less than or equal to 4.
For example, the UE may also calculate CQI1, CQI2, CQI3, CQI4, feedback CQI1, CQI2, CQI3, CQI4 according to the above method;
the UE may also calculate and feed back CQI1 and CQI2 according to the above method;
the UE may also calculate and feed back CQI3 and CQI4 according to the above method;
the UE may also calculate and feed back CQI1 and CQI3 according to the above method;
the UE may also calculate and feed back CQI2 and CQI4 according to the above method.
Example 12
As shown in fig. 6, the base station configures 3 sets of CSI-RS information to the UE through high-level signaling, and the terminal can obtain the time-frequency resource positions for transmitting the 3 sets of CSI-RS and information of transmission contents.
The CSI-RS1, the CSI-RS2 and the CSI-RS2 and the CSI-RS3 are used for channel measurement and interference measurement.
The terminal can calculate a channel H1 according to the CSI-RS1, and can calculate and obtain H2 according to the CSI-RS 2. H3 is calculated according to CSI-RS 3.
The useful signal part assumes: it can be assumed that only TP1 transmits useful signals, only TP2 transmits useful signals, and TP1 and TP2 transmit useful signals together.
The interference part assumes:
when only TP1 transmits useful signals, it can be assumed that TP2 and TP3 are not interfered, TP2 and TP3 are interfered, TP2 is interfered, TP3 is not interfered, TP3 is interfered, TP2 is not interfered, TP4-TPn is interfered, and interference signals are measured according to CSI-RS 1;
when only TP2 transmits useful signals, it can be assumed that TP1 and TP3 are not interfered, TP1 and TP3 are interfered, TP1 is interfered, TP3 is not interfered, TP3 is interfered, TP1 is not interfered, TP4-TPn is interfered, and interference signals are measured according to CSI-RS 1;
when the TP1 and the TP2 transmit useful signals, the interference can be carried out on the TP3 or the interference can be carried out on the TP4-TPn, and the interference signals are measured according to the CSI-RS 1;
and reporting the CQI by taking one data transmission part hypothesis and an interference part hypothesis, or reporting various CQIs by taking various data transmission part hypotheses and interference part hypotheses.
Example 13
The base station configures 3 sets of CSI-RS information for the UE through high-level signaling, and then the terminal can obtain the time-frequency resource positions sent by the 3 sets of CSI-RS and the information of the sending content.
The terminal can calculate a channel H1 according to the CSI-RS1, and can calculate and obtain H2 according to the CSI-RS 2. H3 is calculated according to CSI-RS 3.
The useful signal part assumes: it can be assumed that only TP1 transmits useful signals, only TP2 transmits useful signals, only TP3 transmits useful signals, TP1 and TP2 transmit useful signals together, TP2 and TP3 transmit useful signals together, TP1 and TP3 transmit useful signals together, TP1, TP2, and TP3 transmit useful signals together, and 7 cases in total.
The interference part assumes:
the interference measurement pilot set is a subset of a channel measurement set (CSI feedback set), and is different for different useful signal transmission hypotheses.
For example, when only TP1 is assumed to transmit a useful signal, CSI-RS2 and CSI-RS3 are interference measurement pilot sets, and it can be assumed that TP2 has interference and TP3 has interference and does not have interference, TP3 has interference and TP2 has interference and TP2 and TP3 have interference and TP2 and TP3 have interference. The TP4-TPn has interference, and interference signals are measured according to CSI-RS 1;
when only TP2 is supposed to transmit useful signals, CSI-RS1 and CSI-RS3 are interference measurement pilot frequency sets, TP1 can be supposed to have interference and have no interference to TP3, TP1 can have interference and have interference to TP3, TP1 and TP3 can have interference, and TP1 and TP3 can have no interference. The TP4-TPn has interference, and interference signals are measured according to CSI-RS 2;
assuming that only TP3 transmits useful signals, CSI-RS1 and CSI-RS2 are interference measurement pilot frequency sets, and assuming that TP1 has interference and TP2 does not have interference, TP2 has interference and TP1 does not have interference, TP1 and TP2 both have interference, and TP1 and TP2 both have interference. The TP4-TPn has interference, and interference signals are measured according to CSI-RS 3;
assuming that TP1 and TP2 transmit useful signals, CSI-RS3 is an interference measurement pilot set, and it can be assumed that TP3 has interference and TP3 has no interference. The TP4-TPn has interference, and interference signals are measured according to CSI-RS1 or CSI-RS 2;
assuming that TP1 and TP3 transmit useful signals, CSI-RS2 is an interference measurement pilot set, and it can be assumed that TP2 has interference and TP2 has no interference. The TP4-TPn has interference, and interference signals are measured according to CSI-RS1 or CSI-RS 3;
assuming that TP2 and TP3 transmit useful signals, CSI-RS1 is an interference measurement pilot set, and it can be assumed that TP1 has interference and TP1 has no interference. The TP4-TPn has interference, and interference signals are measured according to CSI-RS2 or CSI-RS 3;
assuming that TP4-TPn has interference when TP1, TP2 and TP3 transmit useful signals, and measuring the interference signals according to CSI-RS1 or CSI-RS2 or CSI-RS 3;
and reporting the CQI by taking one useful signal part hypothesis and an interference part hypothesis, or reporting various CQIs by taking various useful signal part hypotheses and interference part hypotheses.
Example 14
As in the case of embodiments 1 to 13, the UE reports CQIs under multiple assumptions, and after receiving the CQIs, the base station further determines which assumption best meets the current scheduling condition according to the scheduling condition. If not, a certain conversion or prediction is made.
An embodiment of the present invention provides a base station, where the base station is configured to: and informing the terminal of the configuration information of M sets of channel measurement pilot frequencies and the configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers.
Wherein the base station is configured to: and sending the configuration information of the N sets of interference measurement reference pilot frequencies to the terminal through a wireless network control signaling.
Wherein, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection. Of course, there may be no intersection between the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots.
An embodiment of the present invention further provides a terminal, as shown in fig. 7, including a receiving unit, an interference measurement unit, and a feedback unit, where:
the receiving unit is used for: receiving configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers, and the configuration information is sent by a base station;
the interference measurement unit is configured to: acquiring K hypotheses according to the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilot frequencies and the interference information emission situation of the transmission node corresponding to the N sets of interference measurement reference pilot frequencies, calculating the interference information under the K hypotheses according to the interference measurement reference pilot frequencies, and further acquiring the channel quality information under the K hypotheses, wherein K is a natural number;
the feedback unit is configured to feed back the channel quality information obtained by the interference measurement unit to the base station.
Wherein, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies, and N is less than M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
Wherein, the interference measurement unit calculating the interference information under the K hypotheses according to the interference measurement reference pilot frequency includes:
for each hypothesis, acquiring a channel matrix of an interference channel according to an interference measurement reference pilot frequency corresponding to a transmission node which transmits interference information under the hypothesis, and acquiring the interference information from the transmission node according to the channel matrix.
Wherein, the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilots acquired by the interference measurement unit includes the following 2M-1 of any one or more of:
each of the transmission nodes A1-AM transmits a useful signal or does not transmit a useful signal, for a total of 2MThe transmission condition is eliminated, and the condition that all transmission nodes do not transmit useful signals is eliminated, and the total is 2M-1 useful signal case;
A1-AM are the transmission nodes corresponding to the M sets of channel measurement reference pilot frequency respectively.
Wherein, the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit includes the following 2NAny one or more of the following:
each transmission node in the transmission node B1-BN transmits interference information or does not transmit interference information, and the interference information are combined to obtain 2 in totalNA case of transmission of interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Wherein, the transmission conditions of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least include two types:
each of the transmission nodes B1-BN transmits interference information;
each of the transmission nodes B1-BN does not transmit interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Wherein the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least includes:
each of the transmission nodes B1-BN transmits interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Wherein the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least includes:
each of the transmission nodes B1-BN does not transmit interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
Wherein, interference measurement reference pilot frequency is dynamically defined under each useful signal transmission condition.
And the terminal does not send information at the time-frequency resource position corresponding to the time-frequency resource position occupied by the interference measurement reference pilot frequency on the transmission node of the useful signal.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.
Claims (22)
1. An interference measurement information notification method includes:
a base station informs a terminal of configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers;
wherein, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
2. The method of claim 1, wherein the base station sends the configuration information of the N sets of interference measurement reference pilots to the terminal through radio network control signaling.
3. An interference measurement method, comprising:
a terminal receives configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers, and the configuration information is sent by a base station;
the terminal obtains K hypotheses according to the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilot frequencies and the interference information emission situation of the transmission node corresponding to the N sets of interference measurement reference pilot frequencies, calculates the interference information under the K hypotheses according to the interference measurement reference pilot frequencies, further obtains the channel quality information under the K hypotheses and feeds the channel quality information back to the base station, wherein K is a natural number;
wherein, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies, and N < M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
4. The method of claim 3, wherein the calculating the interference information under the K hypotheses from the interference measurement reference pilots comprises:
for each hypothesis, acquiring a channel matrix of an interference channel according to an interference measurement reference pilot frequency corresponding to a transmission node which transmits interference information under the hypothesis, and acquiring the interference information from the transmission node according to the channel matrix.
5. The method of claim 3,
the useful signal transmission situation of the transmission node corresponding to the M sets of channel measurement pilots comprises the following 2M-1 of any one or more of:
each of the transmission nodes A1-AM transmits a useful signal or does not transmit a useful signal, for a total of 2MThe transmission condition is eliminated, and the condition that all transmission nodes do not transmit useful signals is eliminated, and the total is 2M-1 useful signal case;
A1-AM are the transmission nodes corresponding to the M sets of channel measurement reference pilot frequency respectively.
6. The method of claim 3, wherein the transmission of the interference information of the transmission nodes corresponding to the N sets of interference measurement reference pilots comprises the following 2NAny one or more of the following:
each transmission node in the transmission node B1-BN transmits interference information or does not transmit interference information, and the interference information are combined to obtain 2 in totalNA case of transmission of interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
7. The method of claim 3, wherein the transmission conditions of the interference information of the transmission nodes corresponding to the N sets of interference measurement reference pilots include at least two of:
each of the transmission nodes B1-BN transmits interference information;
each of the transmission nodes B1-BN does not transmit interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
8. The method as claimed in claim 3, wherein the transmitting of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots comprises at least:
each of the transmission nodes B1-BN transmits interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
9. The method as claimed in claim 3, wherein the transmitting of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots comprises at least:
each of the transmission nodes B1-BN does not transmit interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
10. The method according to any of the claims 3 to 9, characterized in that the interference measurement reference pilots are dynamically defined for each useful signal transmission case.
11. The method according to one of claims 3 to 9, wherein a transmission node transmitting a useful signal does not transmit information on the time-frequency resource locations corresponding to the time-frequency resource locations occupied by the interference measurement reference pilots.
12. A base station, wherein the base station is configured to: informing a terminal of configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers;
wherein, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies, and N < M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
13. The base station of claim 12, wherein the base station is configured to: and sending the configuration information of the N sets of interference measurement reference pilot frequencies to the terminal through a wireless network control signaling.
14. A terminal, comprising a receiving unit, an interference measurement unit, and a feedback unit, wherein:
the receiving unit is used for: receiving configuration information of M sets of channel measurement pilot frequencies and configuration information of N sets of interference measurement reference pilot frequencies, wherein M and N are natural numbers, and the configuration information is sent by a base station;
the interference measurement unit is configured to: acquiring K hypotheses according to the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilot frequencies and the interference information emission situation of the transmission node corresponding to the N sets of interference measurement reference pilot frequencies, calculating the interference information under the K hypotheses according to the interference measurement reference pilot frequencies, and further acquiring the channel quality information under the K hypotheses, wherein K is a natural number;
the feedback unit is configured to feed back the channel quality information obtained by the interference measurement unit to the base station;
wherein, when M > 1:
the N sets of interference measurement reference pilot frequencies are subsets of the M sets of channel measurement reference pilot frequencies, and N < M; or, the N sets of interference measurement reference pilots and the M sets of channel measurement reference pilots have an intersection.
15. The terminal of claim 14, wherein the interference measurement unit calculating the interference information under the K hypotheses based on interference measurement reference pilots comprises:
for each hypothesis, acquiring a channel matrix of an interference channel according to an interference measurement reference pilot frequency corresponding to a transmission node which transmits interference information under the hypothesis, and acquiring the interference information from the transmission node according to the channel matrix.
16. The terminal of claim 14,
the useful signal emission situation of the transmission node corresponding to the M sets of channel measurement pilots acquired by the interference measurement unit includes the following 2M-1 of any one or more of:
each of the transmission nodes A1-AM transmits a useful signal or does not transmit a useful signal, for a total of 2MThe transmission condition is eliminated, and the condition that all transmission nodes do not transmit useful signals is eliminated, and the total is 2M1 useful signal cases；
A1-AM are the transmission nodes corresponding to the M sets of channel measurement reference pilot frequency respectively.
17. The terminal of claim 14, wherein the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit comprises the following 2NAny one or more of the following:
each transmission node in the transmission node B1-BN transmits interference information or does not transmit interference information, and the interference information are combined to obtain 2 in totalNA case of transmission of interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
18. The terminal of claim 14, wherein the transmission conditions of the interference information of the transmission nodes corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit include at least two types:
each of the transmission nodes B1-BN transmits interference information;
each of the transmission nodes B1-BN does not transmit interference information;
B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
19. The terminal of claim 14, wherein the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least includes:
each of the transmission nodes B1-BN transmits interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
20. The terminal of claim 14, wherein the transmission condition of the interference information of the transmission node corresponding to the N sets of interference measurement reference pilots acquired by the interference measurement unit at least includes:
each of the transmission nodes B1-BN does not transmit interference information; B1-BN are respectively transmission nodes corresponding to the N sets of interference measurement reference pilot frequencies.
21. The terminal according to one of claims 14 to 20, characterized in that the interference measurement reference pilot is dynamically defined for each useful signal transmission case.
22. The terminal according to one of claims 14 to 20, wherein the terminal does not send information on the transmission node of the useful signal in time-frequency resource locations corresponding to the time-frequency resource locations occupied by the interference measurement reference pilots.
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