CN101800570B - Method for obtaining channel quality indication (CQI) information - Google Patents

Abstract

The invention discloses a method for obtaining channel quality indication (CQI) information, which comprises the steps of: setting a mapping relationship between a CQI measurement pilot frequency and a physical resource element with the pilot frequency of an antenna port n in a public pilot frequency; and obtaining the CQI information by a receiver according to the CQI measurement pilot frequency, wherein n is 0, 1, 2, or 3. More particularly, the CQI measurement pilot frequency takes some part of the public pilot frequency which is transmitted on the antenna port n as the CQI measurement pilot frequency on the basis of the public pilot frequency of each cooperative small area. Only some part of the public pilot frequency is transmitted to form the channel measurement so as to obtain the CQI information, so that the method greatly saves the overhead of the pilot frequency; and the CQI measurement pilot frequency is set on the basis of the existing public pilot frequency pattern, so that the method can not destroy the existing public pilot frequency pattern, has less impact on a system, and can obtain the CQI information on a whole bandwidth.

Description

A method for obtaining channel quality indication information

technical field

The present invention relates to the technical field of wireless communication, in particular to a method for acquiring Channel Quality Indication (CQI, Channel Quality Indication) information.

Background technique

CQI is channel condition information obtained by a receiver such as a user terminal (UE) in a communication system according to a pilot from a transmitter such as a base station NodeB, and then fed back to the transmitter. The transmitter corresponds the CQI information fed back by the receiver to a certain transmission block size, coding method, and modulation method. On this basis, the transmitter performs resource allocation and scheduling for the receiver according to the CQI information.

In order to improve the throughput of the cell and coordinate interference between cells, a new generation of wireless communication systems, such as the advanced long-term evolution system (LTE-Advance, Long-Term Evolution advance), the advanced international wireless communication system (IMT-Advance, International Mobile Telecommunication Advance) and so on have introduced Coordinate Multipoint Transmission and Reception (COMP for short) between network levels. In 3GPP LTE, the downlink dedicated pilot has been defined as the dedicated demodulation signal of the user terminal (UE). The pilot signal does not need to send multi-antenna weighted weight information, which can greatly save the signaling interaction between the UE and the base station NodeB. . In multi-cell cooperation, using a dedicated pilot as the demodulation pilot of the UE can greatly reduce the signaling interaction between the UE and multiple base stations NodeB, so as to facilitate the flexible switching of various air interface technologies.

However, the downlink dedicated pilot is specially configured for each UE, and is only sent on the time-frequency resources allocated by the UE. If the downlink dedicated pilot is used as the basis for obtaining CQI information, the resource scheduling of the system will not be able to effectively obtain Comprehensive channel quality information.

In addition, if the CQI information is obtained by using the common pilot, the pilot overhead of the system will be greatly increased.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for obtaining channel quality indication information, which can ensure that comprehensive channel quality information is obtained while greatly saving pilot overhead.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

The present invention provides a method for obtaining channel quality indicator CQI information, including:

Using the pilot of the antenna port n in the common pilot, set the mapping relationship between the CQI calculation pilot and the physical resource element to obtain the CQI calculation pilot; the receiver obtains the CQI information according to the CQI calculation pilot;

Wherein, n is 0, or 1, or 2, or 3.

In the above solution, using the pilot of antenna port n in the common pilot, the mapping relationship between the CQI measurement pilot and the physical resource element is set as follows: based on the common pilot of each cooperative cell, the antenna port n A part of the sent common pilot is used as a CQI calculation pilot.

In the above solution, a part of the common pilot is as follows: a certain antenna port in the common pilot of each cell corresponds to several cooperative cells, and each physical resource element on the cooperative resource only transmits the common pilot Each coordinated cell corresponds to a different pilot symbol, which is staggered in the frequency domain.

In the above scheme, the cooperative cell includes cooperative cell 1, cooperative cell 2, cooperative cell 3, and cooperative cell 4, specifically including: corresponding the pilot frequency of the antenna port n to cooperative cell 1, cooperative cell 2, and cooperative cell 3 and the coordinated cell 4; select two of the common pilots of the antenna port n as the CQI calculation pilots of a coordinated cell, and ensure that the CQI calculation pilots of each coordinated cell are evenly staggered.

In the above solution, the coordinated cell 1 uses the first and sixth physical resource elements for sending common pilots on antenna port n as CQI calculation pilots; the coordinated cell 2 uses the physical resource elements for sending common pilots on antenna port n. The second and fifth physical resource elements are used as CQI calculation pilots; the coordinated cell 3 uses the third and eighth physical resource elements that transmit common pilots on antenna port n as CQI calculation pilots; Cell 4 uses the fourth and seventh physical resource elements for sending common pilots on antenna port n as CQI calculation pilots.

In the above solution, the coordinated cell includes coordinated cell 1, coordinated cell 2, and coordinated cell 3, specifically including: the coordinated cell 1 uses the first and sixth physical resource elements that transmit common pilots on antenna port n as CQI calculation pilot; the coordinated cell 2 uses the second and fifth physical resource elements of the common pilot sent on the antenna port n as the CQI calculation pilot; the coordinated cell 3 uses the antenna port n to send the common pilot The third and eighth physical resource elements of are used as CQI calculation pilots.

In the above solution, the coordinated cell includes coordinated cell 1 and coordinated cell 2, specifically including: the coordinated cell 1 uses the first and sixth physical resource elements that transmit common pilots on antenna port n as CQI calculation pilots ; The coordinated cell 2 uses the second and fifth physical resource elements for sending common pilots on antenna port n as CQI calculation pilots.

In the above scheme, a part of the common pilot is as follows: a certain antenna port in the common pilot of each cell corresponds to several cooperative cells, and each physical resource element on the cooperative resource only transmits the data of the common pilot. Pilot symbols.

In the above scheme, the cooperative cell includes cooperative cell 1, cooperative cell 2, cooperative cell 3 and cooperative cell 4, specifically including: corresponding the pilot frequency of antenna port n to cooperative cell 1, cooperative cell 2, cooperative cell 3 and cooperative cell Cell 4: select four of the common pilots of antenna port n as CQI calculation pilots of a coordinated cell.

In the above solution, the coordinated cell 1 uses the first, second, fifth and sixth physical resource elements of the common pilot sent on the antenna port n as the CQI calculation pilot.

In the above solution, the coordinated cell 1 uses the first, fourth, fifth and eighth physical resource elements of the common pilot sent on the antenna port n as the CQI calculation pilot.

In the above solution, the coordinated cell 1 uses the second, third, sixth and seventh physical resource elements of the common pilot sent on the antenna port n as the CQI calculation pilot.

In the above solution, the coordinated cell 1 uses the first, second, seventh and eighth physical resource elements of the common pilot sent on the antenna port n as the CQI calculation pilot.

In the above solution, the mapping position of the CQI measurement pilot is obtained by shifting the frequency domain with different frequency hopping values for each cell.

In the above solution, when the frequency hopping values are equal, the high layer resets the frequency hopping values of the conflicting cells to ensure that the CQI calculation pilots of the cooperative cells are mutually staggered in the frequency domain.

In the above scheme, when there are only two cooperating cells, the CQI calculation pilots corresponding to the two cooperating cells are set; when there are only three cooperating cells, the CQI calculation pilots corresponding to the three cooperating cells are set, The four common pilots shown are still mapped.

In the above solution, part of the common pilot is: each cooperative cell maps the CQI measurement pilot according to the maximum number of antenna ports of the cell, and each antenna port only sends A pilot symbols, A=1, or 2, Or 3, or 4.

In the above solution, according to the same mapping pattern, when there are only two cooperating cells, set the CQI calculation pilots corresponding to the two cooperating cells; frequency.

In the above scheme, the coordinated cell 1 uses the first one of the common pilots sent on antenna port 0, the fourth of the common pilots on antenna port 1, the first one of the common pilots on antenna port 2, and The fourth of the common pilots on antenna port 3 is used as a CQI calculation pilot.

In the above solution, the CQI calculation pilots of the coordinated cells are mapped to different subcarriers according to their respective frequency hopping values.

The method also includes: performing multi-antenna weighting processing on the CQI calculation pilots corresponding to each coordinated cell.

It can be seen from the above technical solution that the present invention uses the pilot of the antenna port n in the common pilot to set the mapping relationship between the CQI calculation pilot and the physical resource element to obtain the CQI calculation pilot; the receiver obtains the CQI information according to the CQI calculation pilot . Where n can be 0, or 1, or 2, or 3. Specifically, the CQI calculation pilot of the present invention is based on the common pilot of each coordinated cell, and a part of the common pilot sent on the antenna port n is used as the CQI calculation pilot. For example, a certain antenna port in the common pilot of each cell corresponds to several cooperative cells, and each physical resource element on the cooperative resource only transmits the pilot symbol of the common pilot, and each cooperative cell corresponds to a different The pilot symbols are staggered from each other in the frequency domain. For another example, a certain antenna port in the common pilot of each cell corresponds to several cooperative cells, and each physical resource element on the cooperative resource only transmits the pilot symbol of the common pilot, and each cooperative cell Corresponding to the same pilot symbol, the CQI calculation pilots of each cell are staggered in the frequency domain by different frequency hopping values when the pilot mapping value is used. As another example, each cooperative cell maps the CQI calculation pilot according to the maximum number of antenna ports in the cell, and each antenna port only sends one pilot symbol; and the CQI calculation pilots of each cooperative cell are different according to their respective frequency hopping values, mapped to different subcarriers.

As can be seen from the method of the present invention, only part of the common pilot is sent for channel measurement to obtain CQI information, which greatly saves the pilot overhead; because the CQI measurement and calculation pilot is set on the basis of the existing common pilot pattern, no The existing public pilot pattern will be destroyed, the impact on the system is small, and the CQI information on the full bandwidth can be obtained.

Further, the CQI calculation pilots of each coordinated cell may be subjected to multi-antenna weighting processing.

Description of drawings

Figure 1a is a schematic diagram of a common pilot pattern of a normal cyclic prefix frame structure in the prior art;

FIG. 1b is a schematic diagram of a common pilot pattern of a long cyclic prefix frame structure in the prior art;

FIG. 2a is a schematic diagram of a first embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a normal cyclic prefix frame structure in the present invention;

FIG. 2b is a schematic diagram of a first embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a long cyclic prefix frame structure in the present invention;

3a is a schematic diagram of a second embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a normal cyclic prefix frame structure in the present invention;

3b is a schematic diagram of a second embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a long cyclic prefix frame structure in the present invention;

4a is a schematic diagram of a third embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a normal cyclic prefix frame structure in the present invention;

FIG. 4b is a schematic diagram of a third embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a long cyclic prefix frame structure in the present invention;

5a is a schematic diagram of a fourth embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a normal cyclic prefix frame structure in the present invention;

FIG. 5b is a schematic diagram of a fourth embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a long cyclic prefix frame structure in the present invention;

FIG. 6a is a schematic diagram of a fifth embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a normal cyclic prefix frame structure in the present invention;

FIG. 6b is a schematic diagram of a fifth embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a long cyclic prefix frame structure in the present invention.

FIG. 7a is a schematic diagram of a sixth embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a normal cyclic prefix frame structure in the present invention;

7b is a schematic diagram of a sixth embodiment of a mapping pattern between CQI calculation pilots and physical resource elements in a long cyclic prefix frame structure in the present invention.

Detailed ways

Since the pilot used to obtain the CQI information only needs to know the quality state of the channel, the density can be much smaller than the demodulation pilot. Therefore, according to the common pilot pattern defined in 3GPP TS 36.211, the present invention uses the pilot of antenna port 0 in the common pilot to set the mapping relationship between the CQI measurement pilot and the physical resource element. Figure 1a is a schematic diagram of the common pilot pattern of the normal cyclic prefix frame structure in the prior art, and Figure 1b is a schematic diagram of the common pilot pattern of the long cyclic prefix frame structure in the prior art, as shown in Figure 1a and Figure 1b, R0 represents the antenna The mapping position of the common pilot transmitted by port 0 and the physical resource element in the pattern, R1 indicates the mapping position of the common pilot transmitted by antenna port 1 and the physical resource element in the pattern, R2 indicates the common pilot transmitted by antenna port 2 in The mapping position of the physical resource element in the pattern, R3 indicates the mapping position of the common pilot sent by the antenna port 3 and the physical resource element in the pattern.

According to the existing common pilot pattern shown in Fig. 1a and Fig. 1b, in the present invention, first use the pilot frequency of the antenna port n in the common pilot frequency to set the mapping relationship between the CQI measurement pilot frequency and the physical resource element, so as to obtain the CQI calculation Pilot frequency: the receiver obtains CQI information according to the obtained CQI calculation pilot frequency. Wherein, the implementation method for the receiver to acquire the CQI information according to the obtained CQI calculation pilot can be realized by many existing methods, and the present invention emphasizes the acquisition of the CQI calculation pilot. The CQI calculation pilot of the present invention is based on the common pilot of each cooperative cell, and a part of the common pilot transmitted on the antenna port n is used as the CQI calculation pilot. The following two methods are specifically implemented. Where n can be 0, or 1, or 2, or 3.

In the first way, a certain antenna port in the common pilot of each cell corresponds to several cooperative cells, and each physical resource element on the cooperative resource only transmits the pilot symbol of the common pilot, and each The coordinated cells correspond to different pilot symbols, which are staggered from each other in the frequency domain.

The pilot frequency of the antenna port n corresponds to the cooperative cell 1, the cooperative cell 2, the cooperative cell 3 and the cooperative cell 4 respectively. Select two of the physical resource elements of the common pilot of antenna port n as the CQI calculation pilot of a coordinated cell, and ensure that the CQI calculation pilots of each coordinated cell are evenly staggered, where n can be 0, or 1, or 2, or 3. Figure 2a is a schematic diagram of the first embodiment of the mapping pattern of the CQI calculation pilot and the physical resource element in the normal cyclic prefix frame structure in the present invention; Figure 2b is the CQI calculation pilot and the physical resource in the long cyclic prefix frame structure in the present invention A schematic diagram of a first embodiment of a mapping pattern of elements. The specific positions are shown in FIG. 2a and FIG. 2b. In the first embodiment, n is taken as 0 as an example for description.

Among them, coordinated cell 1 uses the first and sixth physical resource elements for sending common pilots on antenna port 0, as shown in C0 in the figure, and coordinated cell 2 uses the second and fifth physical resource elements for sending common pilots on antenna port 0. The first physical resource element is shown as C1 in the figure, and the coordinated cell 3 uses the antenna port 0 to transmit the common pilot. The third and eighth physical resource elements are shown as C2 in the figure, and the coordinated cell 4 uses the antenna port 0 to transmit the common pilot The fourth and seventh physical resource elements of frequency are C3 in the figure.

When there are only three coordinated cells, the fourth and seventh physical resource elements corresponding to the 0-th common pilot of coordinated cell 4 are not sent. When there are only two cooperating cells, the third, fourth, seventh and eighth physical resource elements corresponding to the 0th common pilot of coordinating cell 3 and coordinating cell 4 are not sent.

Further, the CQI calculation pilots of each coordinated cell may be subjected to multi-antenna weighting processing for each cell. The specific implementation belongs to the technical means commonly used by those skilled in the art, and will not be repeated here.

In the second way, a certain antenna port in the common pilot of each cell corresponds to several cooperative cells, and each physical resource element on the cooperative resource only transmits the pilot symbol of the common pilot, and each cooperative When the cells correspond to the same pilot symbol, the CQI calculation pilots of each cell are staggered in the frequency domain by using different frequency hopping values in the pilot mapping value.

The pilot frequency of the antenna port n corresponds to the cooperative cell 1, the cooperative cell 2, the cooperative cell 3 and the cooperative cell 4 respectively. Four of the physical resource elements of the common pilot of antenna port n are selected as the CQI calculation pilot of a coordinated cell, and the CQI calculation pilots of each coordinated cell are staggered from each other through different frequency hopping values of the pilots of each coordinated cell, wherein, The frequency hopping value is equal to modulo 3 of the coordinated cell identification number.

Figure 3a is a schematic diagram of a second embodiment of the mapping pattern of CQI calculation pilots and physical resource elements in the normal cyclic prefix frame structure in the present invention; Figure 3b is a CQI calculation pilot and physical resources in the long cyclic prefix frame structure in the present invention A schematic diagram of a second embodiment of a mapping pattern of elements. The specific location is shown in Figure 3a and Figure 3b. In the second embodiment, it is described by taking n as 0 as an example.

Among them, cooperative cell 1 uses the first, second, fifth and sixth physical resource elements of common pilots sent on antenna port 0 as CQI calculation pilots, corresponding to C01 and C01 in Figure 3a and Figure 3b respectively. C02, C05 and C06. Assume that the frequency hopping value of coordinated cell 1 is 0, the frequency hopping value of coordinated cell 2 is 1, the frequency hopping value of coordinated cell 3 is 2, and the frequency hopping value of coordinated cell 4 is 3. Then, the coordinated cell 2 uses the next adjacent physical resource element of the physical resource element used by the coordinated cell 1 as a CQI calculation pilot, and the corresponding physical resource elements are C11, C12, C15 and C16 in Figure 3a and Figure 3b; Cell 3 uses the next adjacent physical resource element of the physical resource element used by cooperative cell 2 as a CQI calculation pilot, and the corresponding physical resource elements are C21, C22, C25 and C26 in Figure 3a and Figure 3b; coordinated cell 4 uses The next adjacent physical resource element of the physical resource element used by the coordinated cell 3 is used as a CQI calculation pilot, and the corresponding physical resource elements are C31, C32, C35 and C36 in Fig. 3a and Fig. 3b.

In the second embodiment, it is assumed that the frequency hopping values mapped by the pilots of the coordinated cells are not equal to each other. If the frequency hopping values mapped by the pilots of the cooperative cells are equal, the high layer can reset the frequency hopping values of the conflicting cells to ensure that the CQI calculation pilots of the cooperative cells are staggered in the frequency domain. Here, the specific implementation of resetting the frequency hopping value of the conflicting cell by the high layer belongs to the technology known to those skilled in the art, and has nothing to do with the present invention, so it will not be described in detail here.

The second embodiment illustrates the mapping relationship of the CQI calculation pilots of the four coordinated cells. When there are only two cooperative cells, mapping the CQI calculation pilots corresponding to the two cells means only setting the CQI calculation pilots corresponding to the two cooperative cells; when there are only three cooperative cells, mapping the CQI calculation pilots corresponding to the three cells That is, the CQI calculation pilots corresponding to the three coordinated cells are set, and each coordinated cell is still mapped to the four common pilots shown.

Figure 4a is a schematic diagram of the third embodiment of the mapping pattern of the CQI calculation pilot and the physical resource element in the normal cyclic prefix frame structure in the present invention; Figure 4b is the CQI calculation pilot and the physical resource in the long cyclic prefix frame structure in the present invention A schematic diagram of a third embodiment of a mapping pattern of elements. The specific location is shown in Figure 4a and Figure 4b. In the third embodiment, it is described by taking n as 0 as an example.

Among them, coordinated cell 1 uses the first, fourth, fifth and eighth physical resource elements of the common pilot sent on antenna port 0 as CQI calculation pilots, corresponding to C01, C04, C05 and C08. Assume that the frequency hopping value of coordinated cell 1 is 0, the frequency hopping value of coordinated cell 2 is 1, the frequency hopping value of coordinated cell 3 is 2, and the frequency hopping value of coordinated cell 4 is 3. Then, the physical resource elements corresponding to the coordinated cell 2 are C11, C14, C15 and C18 in Figure 4a and Figure 4b; the physical resource elements corresponding to the coordinated cell 3 are C21, C24, C25 and C28 in Figure 4a and Figure 4b; The physical resource elements corresponding to the coordinated cell 4 are C31, C34, C35 and C38 in Fig. 4a and Fig. 4b.

In the third embodiment, it is assumed that the frequency hopping values mapped by the pilots of the coordinated cells are not equal to each other. If the frequency hopping values mapped by the pilots of the cooperative cells are equal, the high layer can reset the frequency hopping values of the conflicting cells to ensure that the CQI calculation pilots of the cooperative cells are staggered in the frequency domain. Here, the specific implementation of resetting the frequency hopping value of the conflicting cell by the high layer belongs to the technology known to those skilled in the art, and has nothing to do with the present invention, so it will not be described in detail here.

The third embodiment illustrates the mapping relationship of the CQI calculation pilots of the four coordinated cells. When there are only two cooperative cells, mapping the CQI calculation pilots corresponding to the two cells means only setting the CQI calculation pilots corresponding to the two cooperative cells; when there are only three cooperative cells, mapping the CQI calculation pilots corresponding to the three cells That is, the CQI calculation pilots corresponding to the three coordinated cells are set, and each coordinated cell is still mapped to the four common pilots shown.

Figure 5a is a schematic diagram of a fourth embodiment of the mapping pattern of CQI calculation pilots and physical resource elements in the normal cyclic prefix frame structure in the present invention; Figure 5b is a CQI calculation pilot and physical resources in the long cyclic prefix frame structure in the present invention A schematic diagram of a fourth embodiment of a mapping pattern of elements. The specific location is shown in Figure 5a and Figure 5b. In the fourth embodiment, it is described by taking n as 0 as an example.

Among them, the coordinated cell uses the second, third, sixth and seventh physical resource elements of the common pilot sent on the antenna port 0 as the CQI calculation pilot, which correspond to C02 and C03 in Figure 5a and Figure 5b respectively , C06 and C07. Assume that the frequency hopping value of coordinated cell 1 is 0, the frequency hopping value of coordinated cell 2 is 1, the frequency hopping value of coordinated cell 3 is 2, and the frequency hopping value of coordinated cell 4 is 3. Then, the physical resource elements corresponding to the coordinated cell 2 are C12, C13, C16 and C17 in Figure 5a and Figure 5b; the physical resource elements corresponding to the coordinated cell 3 are C22, C23, C26 and C27 in Figure 5a and Figure 5b; The physical resource elements corresponding to the coordinated cell 4 are C32, C33, C36 and C37 in Fig. 5a and Fig. 5b.

In the fourth embodiment, it is assumed that the frequency hopping values mapped by the pilots of the coordinated cells are not equal to each other. If the frequency hopping values mapped by the pilots of the cooperative cells are equal, the high layer can reset the frequency hopping values of the conflicting cells to ensure that the CQI calculation pilots of the cooperative cells are staggered in the frequency domain. Here, the specific implementation of resetting the frequency hopping value of the conflicting cell by the high layer belongs to the technology known to those skilled in the art, and has nothing to do with the present invention, so it will not be described in detail here.

Embodiment 4 illustrates the mapping relationship of CQI calculation pilots of four coordinated cells. When there are only two cooperative cells, mapping the CQI calculation pilots corresponding to the two cells means only setting the CQI calculation pilots corresponding to the two cooperative cells; when there are only three cooperative cells, mapping the CQI calculation pilots corresponding to the three cells That is, the CQI calculation pilots corresponding to the three coordinated cells are set, and each coordinated cell is still mapped to the four common pilots shown.

Figure 6a is a schematic diagram of the fifth embodiment of the mapping pattern of the CQI calculation pilot and the physical resource block in the normal cyclic prefix frame structure in the present invention; Figure 6b is the CQI calculation pilot and the physical resource in the long cyclic prefix frame structure in the present invention A schematic diagram of a fifth embodiment of a mapping pattern of elements. The specific location is shown in Figure 6a and Figure 6b. In the fifth embodiment, it is described by taking n as 0 as an example.

Among them, the coordinated cell uses the first, second, seventh and eighth physical resource elements of the common pilot sent on antenna port 0 as the CQI calculation pilot, which correspond to C01 and C02 in Figure 6a and Figure 6b respectively , C07 and C08. Assume that the frequency hopping value of coordinated cell 1 is 0, the frequency hopping value of coordinated cell 2 is 1, the frequency hopping value of coordinated cell 3 is 2, and the frequency hopping value of coordinated cell 4 is 3. Then, the physical resource elements corresponding to the coordinated cell 2 are C11, C12, C17 and C18 in Figure 6a and Figure 6b; the physical resource elements corresponding to the coordinated cell 3 are C21, C22, C27 and C28 in Figure 6a and Figure 6b; The physical resource elements corresponding to the coordinated cell 4 are C31, C32, C37 and C38 in Fig. 6a and Fig. 6b.

In the fifth embodiment, it is assumed that the frequency hopping values of the pilot mappings of the coordinated cells are not equal to each other. If the frequency hopping values mapped by the pilots of the cooperative cells are equal, the high layer can reset the frequency hopping values of the conflicting cells to ensure that the CQI calculation pilots of the cooperative cells are staggered in the frequency domain. Here, the specific implementation of resetting the frequency hopping value of the conflicting cell by the high layer belongs to the technology known to those skilled in the art, and has nothing to do with the present invention, so it will not be described in detail here.

The fifth embodiment illustrates the mapping relationship of the CQI calculation pilots of the four coordinated cells. When there are only two coordinated cells, mapping the CQI calculation pilots corresponding to the two cells means only setting the CQI calculation pilots corresponding to the two coordinated cells, and each coordinated cell still maps the four common pilots shown; when only When there are three coordinated cells, mapping the CQI calculation pilots corresponding to the three cells means setting the CQI calculation pilots corresponding to the three coordinated cells, and each coordinated cell still maps the four common pilots shown.

Fig. 7a is a schematic diagram of the sixth embodiment of the mapping pattern of the CQI calculation pilot and the physical resource element in the normal cyclic prefix frame structure in the present invention; Fig. 7b is the CQI calculation pilot and the physical resource in the long cyclic prefix frame structure in the present invention A schematic diagram of a sixth embodiment of a mapping pattern of elements. The specific location is shown in Figure 7a and Figure 7b. In the sixth embodiment, n is taken as 0, 1, 2, or 3 as an example for illustration.

Among them, coordinated cell 1 uses the first of the common pilots on antenna port 0, the fourth of the common pilots on antenna port 1, the first of the common pilots on antenna port 2, and the first of the common pilots on antenna port 3. The fourth of the common pilots is used as a CQI calculation pilot, corresponding to C ₀ ⁰¹ , C ₀ ¹⁴ , C ₀ ²¹ and C ₀ ³⁴ in Fig. 7a and Fig. 7b respectively. Assume that the frequency hopping value of coordinated cell 1 is 0, the frequency hopping value of coordinated cell 2 is 1, the frequency hopping value of coordinated cell 3 is 2, and the frequency hopping value of coordinated cell 4 is 3. Then, the physical resource elements corresponding to the coordinated cell 2 are shown as C ₁ ⁰¹ , C ₁ ¹⁴ , C ₁ ²¹ and C ₁ ³⁴ in Figure 7a and Figure 7b; the physical resource elements corresponding to the coordinated cell 3 are shown in Figure 7a and Figure 7b C ₂ ⁰¹ , C ₂ ¹⁴ , C ₂ ²¹ and C ₂ ³⁴ ; the physical resource elements corresponding to the coordinated cell 4 are C ₃ ⁰¹ , C ₃ ¹⁴ , C ₃ ²¹ and C ₃ ³⁴ in Figure 7a and Figure 7b.

The sixth embodiment illustrates the mapping relationship of the CQI calculation pilots of the four coordinated cells. When there are only four groups of cooperative cells (the pilot mapping pattern and processing method of each group of cooperative cells are the same), each cooperative cell maps the CQI measurement pilot according to the maximum number of antenna ports of the cell, but each antenna port only sends A pilot symbols, A=1, or 2, or 3, or 4. Moreover, according to the different frequency hopping values of each coordinated cell, the CQI calculation pilot of each coordinated cell is mapped to different subcarriers.

According to the same mapping pattern, when there are only two cooperative cells, mapping the CQI calculation pilots corresponding to the two cells means only setting the CQI calculation pilots corresponding to the two cooperative cells; when there are only three cooperative cells, the mapping corresponds to three The CQI calculation pilots of the cells are set corresponding to the CQI calculation pilots corresponding to the three coordinated cells.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (19)

1. a method of obtaining channel quality indicator CQI information, is characterized in that, the method comprises:

Utilize the pilot tone of antenna port n in public guide frequency, the mapping relations of CQI calculation pilot frequency and physical resource element are set, obtain the CQI calculation pilot frequency; Receiver obtains CQI information according to the CQI calculation pilot frequency;

Wherein, n gets 0 or 1 or 2 or 3;

The mapping relations of the described CQI of setting calculation pilot frequency and physical resource element are: respectively take the public guide frequency of each cooperation cell as the basis, with the part of the public guide frequency that sends on antenna port n as the CQI calculation pilot frequency;

The part of described public guide frequency is: with corresponding several cooperation cell of certain antenna port in the public guide frequency of each residential quarter, each the physical resource element on the cooperation resource only sends the frequency pilot sign of this road public guide frequency.

2. method according to claim 1, it is characterized in that, the part of described public guide frequency is: with corresponding several cooperation cell of certain antenna port in the described public guide frequency of each residential quarter, each physical resource element on the cooperation resource only sends the frequency pilot sign of this road public guide frequency, the frequency pilot sign that each cooperation cell is corresponding different staggers on frequency domain mutually.

3. method according to claim 2, is characterized in that, described cooperation cell comprises cooperation cell 1, cooperation cell 2, cooperation cell 3 and cooperation cell 4, specifically comprises:

With the corresponding cooperation cell 1 of pilot tone difference of described antenna port n, cooperation cell 2, cooperation cell 3 and cooperation cell 4; Select wherein two CQI calculation pilot frequencies as a cooperation cell of the public guide frequency of antenna port n, and guarantee that the CQI calculation pilot frequency of each cooperation cell evenly staggers.

4. method according to claim 3, is characterized in that, described cooperation cell 1 uses first and the 6th physical resource element of sending public guide frequency on antenna port n as the CQI calculation pilot frequency;

Described cooperation cell 2 uses second of sending public guide frequency on antenna port n and the 5th physical resource element as the CQI calculation pilot frequency;

Described cooperation cell 3 uses the 3rd of sending public guide frequency on antenna port n and the 8th physical resource element as the CQI calculation pilot frequency;

Described cooperation cell 4 uses the 4th of sending public guide frequency on antenna port n and the 7th physical resource element as the CQI calculation pilot frequency.

5. method according to claim 2, is characterized in that, described cooperation cell comprises cooperation cell 1, cooperation cell 2 and cooperation cell 3, specifically comprises:

Described cooperation cell 1 uses first and the 6th physical resource element of sending public guide frequency on antenna port n as the CQI calculation pilot frequency; Described cooperation cell 2 uses second of sending public guide frequency on antenna port n and the 5th physical resource element as the CQI calculation pilot frequency; Described cooperation cell 3 uses the 3rd of sending public guide frequency on antenna port n and the 8th physical resource element as the CQI calculation pilot frequency.

6. method according to claim 2, is characterized in that, described cooperation cell comprises cooperation cell 1 and cooperation cell 2, specifically comprises:

Described cooperation cell 1 uses first and the 6th physical resource element of sending public guide frequency on antenna port n as the CQI calculation pilot frequency; Described cooperation cell 2 uses second of sending public guide frequency on antenna port n and the 5th physical resource element as the CQI calculation pilot frequency.

7. method according to claim 1, is characterized in that, described cooperation cell comprises cooperation cell 1, cooperation cell 2, cooperation cell 3 and cooperation cell 4, specifically comprises:

With the corresponding cooperation cell 1 of pilot tone difference of antenna port n, cooperation cell 2, cooperation cell 3 and cooperation cell 4; Select wherein four CQI calculation pilot frequencies as a cooperation cell of the public guide frequency of antenna port n.

8. method according to claim 7, is characterized in that, described cooperation cell 1 uses first that send public guide frequency on antenna port n, second, the 5th and the 6th physical resource element as the CQI calculation pilot frequency.

9. method according to claim 7, is characterized in that, described cooperation cell 1 uses first that send public guide frequency on antenna port n, the 4th, the 5th and the 8th physical resource element as the CQI calculation pilot frequency.

10. method according to claim 7, is characterized in that, described cooperation cell 1 uses second, the 3rd, the 6th of sending public guide frequency on antenna port n and the 7th physical resource element as the CQI calculation pilot frequency.

11. method according to claim 7 is characterized in that, described cooperation cell 1 uses first that send public guide frequency on antenna port n, second, the 7th and the 8th physical resource element as the CQI calculation pilot frequency.

12. according to claim 8,9,10 or 11 described methods, it is characterized in that, the displacement that the mapping position of described CQI calculation pilot frequency is carried out frequency domain by the different frequency hopping value in each residential quarter obtains.

13. method according to claim 7 is characterized in that, when the frequency hopping value equates, by the frequency hopping value of high layer reset conflict districts, guarantees that the CQI calculation pilot frequency of each cooperation cell staggers mutually at frequency domain.

14. method according to claim 7, it is characterized in that, when only having two cooperation cell, CQI calculation pilot frequency corresponding to these two cooperation cell is set, when only having three cell cooperatives, CQI calculation pilot frequency corresponding to these three cooperation cell is set, four public guide frequencies shown in each cooperation cell is still shone upon.

15. method according to claim 1, it is characterized in that, the part of described public guide frequency is: each cooperation cell is according to the maximum antenna port number mapping CQI calculation pilot frequency of this residential quarter, and each antenna port only sends A frequency pilot sign, A=1 or 2 or 3 or 4.

16. method according to claim 15 is characterized in that, according to identical mapping pattern, when only having two cooperation cell, CQI calculation pilot frequency corresponding to these two cooperation cell is set, when only having three cell cooperatives, CQI calculation pilot frequency corresponding to these three cooperation cell is set.

17. method according to claim 15, it is characterized in that, described cooperation cell 1 is used the 4th of public guide frequency on first that send public guide frequency on antenna port 0, antenna port 1, first of public guide frequency on antenna port 2, and the 4th of the public guide frequency on antenna port 3 is as the CQI calculation pilot frequency.

18. method according to claim 17 is characterized in that, basis frequency hopping value separately is different respectively for the CQI calculation pilot frequency of described each cooperation cell, is mapped on different subcarriers.

19. method according to claim 1 is characterized in that, the method also comprises: CQI calculation pilot frequency corresponding to each cooperation cell carries out respectively many antenna weightings to be processed.

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