CN102868497B - The processing method of upstream multi-antenna transfer of data instruction and device - Google Patents
The processing method of upstream multi-antenna transfer of data instruction and device Download PDFInfo
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Abstract
The processing method that the embodiment of the present invention provides upstream multi-antenna transfer of data to indicate and device, a kind of method comprises: the base station selected order for upstream multi-antenna transfer of data and pre-coding matrix; Described base station sends pre-coding matrix instruction corresponding to the pre-coding matrix of described selection to via node, and send order instruction corresponding to the order of described selection by RRC signaling to described via node, determine pre-coding matrix to make described via node according to described pre-coding matrix instruction and the instruction of described order.Send order instruction by DCI when the embodiment of the present invention can avoid base station scheduling via node in prior art and the more problem of the bit number taken in DCI that causes, thus reduce the expense of DCI.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a method and an apparatus for processing an uplink multi-antenna data transmission indicator.
Background
In a communication system, such as a relay backhaul link of a Long Term Evolution (LTE) system and a long term evolution advanced (LTE-a) system, when a relay node (relay node, RN) is scheduled by a base station, such as an evolved node B (eNB), to perform uplink multi-antenna data transmission, the relay node obtains a Rank Indicator (RI) and a Precoding Matrix Indicator (PMI) for uplink multi-antenna data transmission through Downlink Control Information (DCI) sent by the eNB, and then determines a corresponding precoding matrix according to the obtained rank indicator and precoding matrix indicator, so that the relay node can perform uplink multi-antenna data transmission by using the precoding matrix.
However, the rank indication occupies a larger number of bits in the DCI, which results in an increase in DCI overhead.
Disclosure of Invention
The embodiment of the invention provides a processing method and a processing device for uplink multi-antenna data transmission indication, which are used for reducing the cost of DCI.
One aspect of the present invention provides a method for processing an uplink multi-antenna data transmission indicator, including:
the base station selects a rank and a precoding matrix for uplink multi-antenna data transmission;
and the base station sends a precoding matrix indication corresponding to the selected precoding matrix to a relay node, and sends a rank indication corresponding to the selected rank to the relay node through RRC signaling, so that the relay node determines a precoding matrix according to the precoding matrix indication and the rank indication.
Another aspect of the present invention provides a method for processing uplink multi-antenna data transmission indication, including:
the relay node obtains a precoding matrix indication sent by the base station and obtains a rank indication sent by the base station through RRC signaling;
and the relay node determines a precoding matrix according to the precoding matrix indication and the rank indication.
Another aspect of the present invention provides a processing apparatus for uplink multi-antenna data transmission indication, including:
a selecting unit, configured to select a rank and a precoding matrix for uplink multi-antenna data transmission;
a sending unit, configured to send a precoding matrix indicator corresponding to the precoding matrix selected by the selecting unit to a relay node, and send a rank indicator corresponding to the rank selected by the selecting unit to the relay node through an RRC signaling, so that the relay node determines the precoding matrix according to the precoding matrix indicator and the rank indicator.
Another aspect of the present invention provides a processing apparatus for uplink multi-antenna data transmission indication, including:
the device comprises an obtaining unit, a calculating unit and a transmitting unit, wherein the obtaining unit is used for obtaining a precoding matrix indication sent by a base station and obtaining a rank indication sent by the base station through Radio Resource Control (RRC) signaling;
a determining unit, configured to determine a precoding matrix according to the precoding matrix indicator and the rank indicator obtained by the obtaining unit.
As can be seen from the foregoing technical solutions, in the embodiments of the present invention, after selecting a rank and a precoding matrix for uplink multi-antenna data transmission, a base station sends a precoding matrix indication corresponding to the selected precoding matrix to a relay node, and sends a rank indication corresponding to the selected rank to the relay node through an RRC signaling, so that a problem of a large number of bits occupied in DCI due to DCI transmission rank indication when the base station schedules user equipment under the relay node in the prior art can be avoided, thereby reducing DCI overhead.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 6 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 7 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 8 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a processing apparatus for uplink multi-antenna data transmission indication according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a processing device for uplink multi-antenna data transmission indication according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to an embodiment of the present invention, and as shown in fig. 1, the processing method for uplink multi-antenna data transmission indication according to the embodiment may include:
101. the base station selects a rank and a precoding matrix for uplink multi-antenna data transmission;
102. the base station sends a precoding matrix indication corresponding to the selected precoding matrix to a relay node, and sends a rank indication corresponding to the selected rank to the relay node through Radio Resource Control (RRC) signaling, so that the relay node determines the precoding matrix according to the precoding matrix indication and the rank indication.
It can be understood that: after the relay node determines the precoding matrix according to the precoding matrix indicator and the rank indicator, the uplink multi-antenna data transmission can be performed by using the precoding matrix.
Because the base station and the relay node are both static and a strong direct path exists between the base station and the relay node, the frequency characteristic of the channel is relatively flat and changes slowly, so that the rank of uplink multi-antenna data transmission can be kept unchanged for a long time. Therefore, the base station may semi-statically include the rank of the uplink multi-antenna data transmission in the RRC signaling transmitted to the relay node, without dynamically including the rank of the uplink multi-antenna data transmission in the DCI for uplink scheduling transmitted to the relay node.
In this embodiment, after selecting the rank and the precoding matrix for uplink multi-antenna data transmission, the base station sends the precoding matrix indication corresponding to the selected precoding matrix to the relay node, and sends the rank indication corresponding to the selected rank to the relay node through the RRC signaling, so that a problem that in the prior art, when the base station schedules the user equipment under the relay node, the number of bits occupied in DCI is large due to DCI sending rank indication can be avoided, and thus, the DCI overhead is reduced.
It can be understood that: the codebook for uplink multi-antenna data transmission can adopt two codebook structures, one is a single codebook structure (that is, the relay node uses one precoding matrix to perform uplink multi-antenna data transmission), and the other is a double codebook structure (that is, the relay node uses two precoding matrices to construct a final precoding matrix to perform uplink multi-antenna data transmission).
Optionally, if the codebook for uplink multi-antenna data transmission adopts a single codebook structure (that is, the relay node performs uplink multi-antenna data transmission by using one precoding matrix), then further, the precoding matrix selected by the base station in this embodiment may include the first precoding matrix. Accordingly, the base station may send a precoding matrix indicator corresponding to the selected first precoding matrix to the relay node through the first DCI or the RRC signaling.
Optionally, if the codebook for uplink multi-antenna data transmission adopts a dual-codebook structure (that is, the relay node constructs a final precoding matrix by using two precoding matrices to perform uplink multi-antenna data transmission), then further, the precoding matrices selected by the base station in this embodiment may include a second precoding matrix and a third precoding matrix. Accordingly, the base station may send the precoding matrix indicator corresponding to the selected second precoding matrix and the precoding matrix indicator corresponding to the third precoding matrix to the relay node through the second DCI, or may also send the precoding matrix indicator corresponding to the selected second precoding matrix to the relay node through the RRC signaling and send the precoding matrix indicator corresponding to the selected third precoding matrix to the relay node through the third DCI.
Wherein, the second precoding matrix may be used to represent long-term channel characteristics, and the third precoding matrix may be used to represent short-term channel characteristics; or
The second precoding matrix may be used to represent wideband channel characteristics, and the third precoding matrix may be used to represent narrowband channel characteristics; or
The second precoding matrix may be used to represent long-term and wideband channel characteristics, and the third precoding matrix may be used to represent at least one of short-term and narrowband channel characteristics.
The rank indication RI may be periodically semi-statically configured by the base station through RRC signaling, and the precoding matrix indication PMI may be dynamically notified aperiodically by the base station through downlink control information. When the relay node RN obtains the PMI value used for uplink data transmission from the downlink control information, the RN determines a precoding matrix by using the RI value and the PMI value included in the RRC signaling which is currently received.
The two cases of the above two codebooks are further described by two other embodiments.
Fig. 2 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, which is suitable for a case where a codebook for uplink multi-antenna data transmission adopts a single codebook structure. As shown in fig. 2, the method for processing uplink multi-antenna data transmission indication in this embodiment may include:
201. the base station selects a rank for uplink multi-antenna data transmission;
202. the base station sends a rank indication corresponding to the selected rank to the relay node through RRC signaling;
203. the base station selects a precoding matrix for uplink multi-antenna data transmission;
204. and the base station transmits a precoding matrix indication corresponding to the selected precoding matrix to the relay node through the DCI.
In this embodiment, for the case that the codebook for uplink multi-antenna data transmission adopts the single codebook structure, after selecting the rank for uplink multi-antenna data transmission, the base station sends the rank indication corresponding to the selected rank to the relay node through the RRC signaling, and after selecting the precoding matrix for uplink multi-antenna data transmission, the base station sends the precoding matrix indication corresponding to the selected precoding matrix to the relay node through the DCI, so that the problem of a large number of bits occupied in the DCI due to the DCI sending the rank indication when the base station schedules the user equipment under the relay node in the prior art can be avoided, thereby reducing the overhead of the DCI.
In the following, taking uplink 4-antenna transmission as an example, the defined codebook includes sub-codebooks with RI of 1, 2, 3 and 4. Wherein, the sub-codebook with RI being 1 includes 24 precoding matrices, and the corresponding PMI is 0, 1. A sub-codebook with RI of 2 includes 16 precoding matrices, and the corresponding PMI is 0, 1. A sub-codebook with RI of 3 includes 12 precoding matrices, and the corresponding PMI is 0, 1. The sub-codebook with RI of 4 only includes 1 precoding matrix, and the corresponding PMI is 0. When uplink multi-antenna data transmission adopts 1 codeword (codeword), 1 or 2-layer transmission may be adopted, that is, RI may be 1 or 2, where RI is 2 for retransmission only. When the uplink multi-antenna data transmission adopts 2 code words, 2-4 layers of transmission can be adopted, namely RI can be 2, 3 or 4. Table 1 shows RI and PMI in DCI in the prior art, where RI and PMI employ joint coding.
TABLE 1
As can be seen from table 1, when 1 codeword is used for uplink multi-antenna data transmission, the RI and PMI (i.e., joint coding of RI and PMI) have 40 states in total; when 2 code words are adopted for uplink multi-antenna data transmission, 29 states are shared by the RI and the PMI. In order to indicate all states of 1 codeword or 2 codewords, the number of bits after RI and PMI joint coding should be 6.
Table 2 shows the PMI in DCI when the RI transmitted by the base station to the relay node through RRC signaling is 2 in this embodiment, that is, the RI is transmitted through RRC signaling, and the PMI is transmitted through DCI.
TABLE 2
As can be seen from table 2, when 1 codeword is used for uplink multi-antenna data transmission, the PMI has 16 states in total; when 2 code words are adopted for uplink multi-antenna data transmission, the PMI has 16 states in total. In order to be able to indicate all states in 1 codeword or 2 codewords, the number of bits of PMI should be 4, saving 2 bits of DCI compared to table 1.
Table 3 shows the PMI in the DCI in this embodiment when the RI sent by the base station to the relay node through RRC signaling is 3, that is, the RI is transmitted through RRC signaling, and the PMI is transmitted through DCI, where there are only two codewords.
TABLE 3
As can be seen from table 3, PMI has 12 states in total. In order to be able to indicate all states in 2 codewords, the number of bits of PMI should be 4, saving 2 bits of DCI compared to table 1.
Fig. 3 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, which is suitable for a case where a codebook for uplink multi-antenna data transmission adopts a dual-codebook structure. As shown in fig. 3, the method for processing uplink multi-antenna data transmission indication in this embodiment may include:
301. the base station selects a rank for uplink multi-antenna data transmission;
302. the base station sends a rank indication corresponding to the selected rank to the relay node through RRC signaling;
303. the base station selects two precoding matrixes for uplink multi-antenna data transmission;
one precoding matrix is used for representing long-term or broadband channel characteristics and is recorded as a first precoding matrix, and the other precoding matrix is used for representing short-term or narrowband channel characteristics and is recorded as a second precoding matrix;
304. and the base station sends precoding matrix indications corresponding to the two selected precoding matrices to the relay node through the DCI, namely a precoding matrix indication corresponding to the first precoding matrix and a precoding matrix indication corresponding to the second precoding matrix.
In this embodiment, when a codebook for uplink multi-antenna data transmission adopts a dual codebook structure, a base station sends a rank indication corresponding to the selected rank to a relay node through an RRC signaling after selecting a rank for uplink multi-antenna data transmission, and after selecting a first precoding matrix and a second precoding matrix for uplink multi-antenna data transmission, the base station sends a precoding matrix indication corresponding to the selected first precoding matrix and a precoding matrix indication corresponding to the second precoding matrix to the relay node through DCI.
Fig. 4 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, which is suitable for a case where a codebook for uplink multi-antenna data transmission adopts a dual-codebook structure. As shown in fig. 4, the method for processing uplink multi-antenna data transmission indication in this embodiment may include:
401. the base station selects the rank for uplink multi-antenna data transmission and a precoding matrix for representing the long-term or broadband channel characteristics, and the rank is recorded as a first precoding matrix;
402. the base station sends a rank indication corresponding to the selected rank and a precoding matrix indication corresponding to the first precoding matrix to the relay node through RRC signaling;
403. the base station selects another precoding matrix used for expressing short-term or narrowband channel characteristics and used for uplink multi-antenna data transmission, and the precoding matrix is recorded as a second precoding matrix;
404. and the base station transmits a precoding matrix indication corresponding to the selected second precoding matrix to the relay node through the DCI.
In this embodiment, when the codebook for uplink multi-antenna data transmission adopts the dual codebook structure, the base station sends, to the relay node, the rank indication corresponding to the selected rank and the precoding matrix indication corresponding to the first precoding matrix through the RRC signaling after selecting the rank and the first precoding matrix for uplink multi-antenna data transmission, and the base station sends, to the relay node, the precoding matrix indication corresponding to the selected second precoding matrix through the DCI after selecting the second precoding matrix for uplink multi-antenna data transmission, so that the problem of a large number of bits occupied in the DCI due to the DCI sending the rank indication when the base station schedules the user equipment under the relay node in the prior art can be avoided, and thus the overhead of the DCI is further reduced.
In the following, transmission based on dual codebook precoding with a maximum RI of 4 for 8 uplink antennas is taken as an example, and the defined codebook includes sub codebooks with RIs of 1, 2, 3 and 4. Wherein the number of two precoding matrices (i.e., the second precoding matrix and the third precoding matrix) under different ranks is as shown in table 4.
TABLE 4
When uplink multi-antenna data transmission adopts 1 codeword (codeword), 1 or 2-layer transmission may be adopted, that is, RI may be 1 or 2, where RI is 2 for retransmission only. When the uplink multi-antenna data transmission adopts 2 code words, 2-4 layers of transmission can be adopted, namely RI can be 2, 3 or 4. Table 5 shows RI and PMI in DCI in the prior art, where RI and PMI employ joint coding.
TABLE 5
As can be seen from table 5, when 1 codeword is used for uplink multi-antenna data transmission, 512 states of RI and PMI (i.e., joint coding of RI and PMI) are total; when the uplink multi-antenna data transmission adopts 2 code words, 352 states are shared by the RI and the PMI. In order to indicate all states of 1 codeword or 2 codewords, the number of bits after RI and PMI joint coding should be 9.
Table 6 gives the PMIs in DCI when the RI transmitted by the base station to the relay node through RRC signaling is 2 in this embodiment, that is, the RI is transmitted through RRC signaling, and one PMI (precoding matrix identifying channel characteristics indicating long-term or wideband) and another PMI (precoding matrix identifying channel characteristics indicating short-term or narrowband) are transmitted through DCI.
TABLE 6
As can be seen from table 6, when 1 codeword is used for uplink multi-antenna data transmission, the PMI has 255 states; when 2 code words are adopted for uplink multi-antenna data transmission, the PMI has 255 states in total. In order to be able to indicate all states in 1 codeword or 2 codewords, the number of bits of PMI should be 8, saving 1 bit of DCI compared to table 5.
Table 7 shows the PMI in DCI when the RI transmitted by the base station to the relay node through RRC signaling is 3 in this embodiment, that is, the RI is transmitted through RRC signaling, and one PMI (precoding matrix that identifies channel characteristics indicating long-term or wideband) and another PMI (precoding matrix that identifies channel characteristics indicating short-term or narrowband) are transmitted through DCI, where there are only two codewords.
TABLE 7
As can be seen from table 7, the PMI has 64 states in total. In order to be able to indicate all states in 2 codewords, the number of bits of PMI should be 6, saving 3 bits of DCI compared to table 5.
Table 8 shows the PMI in DCI when the RI transmitted by the base station to the relay node through RRC signaling is 4 in this embodiment, that is, the RI is transmitted through RRC signaling, and one PMI (precoding matrix that identifies channel characteristics indicating long-term or wideband) and another PMI (precoding matrix that identifies channel characteristics indicating short-term or narrowband) are transmitted through DCI, where there are only two codewords.
TABLE 8
As can be seen from table 8, the PMI has 32 states in total. In order to be able to indicate all states in 2 codewords, the number of bits of PMI should be 5, saving 4 bits of DCI compared to table 5.
Table 9 shows PMIs in DCI when RI transmitted to the relay node by the base station through RRC signaling is 2 in this embodiment, that is, RI and one PMI (precoding matrix identifying channel characteristics of long term or wideband) are transmitted through RRC signaling, and the other PMI (precoding matrix identifying channel characteristics of short term or narrowband) is transmitted through DCI.
TABLE 9
As can be seen from table 9, when 1 codeword is used for uplink multi-antenna data transmission, the PMI has 16 states in total; when 2 code words are adopted for uplink multi-antenna data transmission, the PMI has 16 states in total. In order to be able to indicate all states in 1 codeword or 2 codewords, the number of bits of PMI should be 4, saving 5 bits of DCI compared to table 5.
Table 10 shows the PMI in DCI when the RI transmitted by the base station to the relay node through RRC signaling is 3 in this embodiment, that is, when RI and one PMI (precoding matrix indicating long-term or wideband channel characteristics) are transmitted through RRC signaling and the other PMI (precoding matrix indicating short-term or narrowband channel characteristics) is transmitted through DCI, there are only two codewords.
Watch 10
As can be seen from table 10, the PMI has 16 states in total. In order to be able to indicate all states in 2 codewords, the number of bits of PMI should be 4, saving 5 bits of DCI compared to table 5.
Table 11 shows the PMI in DCI in this embodiment, that is, when the RI transmitted to the relay node by the base station through RRC signaling is 4, that is, when RI and one PMI (a precoding matrix that identifies channel characteristics indicating long-term or wideband) are transmitted through RRC signaling, and another PMI (a precoding matrix that identifies channel characteristics indicating short-term or narrowband) is transmitted through DCI, there are only two codewords.
TABLE 11
As can be seen from table 11, PMI has 8 states in total. In order to be able to indicate all states in 2 codewords, the number of bits of PMI should be 3, saving 6 bits of DCI compared to table 5.
The technical scheme of the invention can be applied to communication systems such as an LTE system, an LTE-A system and the like. The base station can be an eNB in an LTE system or an LTE-A system.
Fig. 5 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, and as shown in fig. 5, the processing method for uplink multi-antenna data transmission indication according to this embodiment may include:
501. the relay node obtains a precoding matrix indication sent by the base station and obtains a rank indication sent by the base station through RRC signaling;
502. and the relay node determines a precoding matrix according to the precoding matrix indication and the rank indication.
Because the base station and the relay node are both static and a strong direct path exists between the base station and the relay node, the frequency characteristic of the channel is relatively flat and changes slowly, so that the rank of uplink multi-antenna data transmission can be kept unchanged for a long time. Therefore, the base station may semi-statically include the rank of the uplink multi-antenna data transmission in the RRC signaling transmitted to the relay node, without dynamically including the rank of the uplink multi-antenna data transmission in the DCI for uplink scheduling transmitted to the relay node.
In this embodiment, the relay node obtains the precoding matrix indication sent by the base station after selecting the precoding matrix for uplink multi-antenna data transmission, and obtains the rank indication sent by the base station after selecting the rank for uplink multi-antenna data transmission through the RRC signaling, so that the problem of a large number of bits occupied in DCI due to DCI sending rank indication when the base station schedules the user equipment under the relay node in the prior art can be avoided, thereby reducing DCI overhead.
It can be understood that: the codebook for uplink multi-antenna data transmission can adopt two codebook structures, one is a single codebook structure (that is, the relay node uses one precoding matrix to perform uplink multi-antenna data transmission), and the other is a double codebook structure (that is, the relay node uses two precoding matrices to construct a final precoding matrix to perform uplink multi-antenna data transmission).
Optionally, if the codebook for uplink multi-antenna data transmission adopts a single codebook structure (that is, the relay node performs uplink multi-antenna data transmission by using one precoding matrix), then further, the precoding matrix indication sent by the base station, obtained by the relay node in this embodiment, may include the first precoding matrix indication. Correspondingly, the relay node may further obtain the first precoding matrix indication sent by the base station through the first DCI or the RRC signaling.
Optionally, if the codebook for uplink multi-antenna data transmission adopts a dual-codebook structure (that is, the relay node constructs a final precoding matrix by using two precoding matrices to perform uplink multi-antenna data transmission), then further, the precoding matrix indication sent by the base station, which is obtained by the relay node in this embodiment, may include a second precoding matrix indication and a third precoding matrix indication; correspondingly, the relay node may further obtain, through the second DCI, the second precoding matrix indicator and the third precoding matrix indicator sent by the base station, or may further obtain, through the RRC signaling, the second precoding matrix indicator sent by the base station, and obtain, through the third DCI, the third precoding matrix indicator.
Wherein, the second precoding matrix may be used to represent long-term channel characteristics, and the third precoding matrix may be used to represent short-term channel characteristics; or
The second precoding matrix may be used to represent wideband channel characteristics, and the third precoding matrix may be used to represent narrowband channel characteristics; or
The second precoding matrix may be used to represent long-term and wideband channel characteristics, and the third precoding matrix may be used to represent at least one of short-term and narrowband channel characteristics.
The two cases of the above two codebooks are further described by two other embodiments.
Fig. 6 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, which is suitable for a case where a codebook for uplink multi-antenna data transmission adopts a single codebook structure. As shown in fig. 6, the method for processing uplink multi-antenna data transmission indication in this embodiment may include:
601. the relay node obtains a rank indication sent by the base station through RRC signaling;
602. the relay node determines the rank of the rank indication identifier according to the rank indication;
603. the relay node obtains a precoding matrix indication sent by the base station through DCI;
604. and the relay node determines a precoding matrix according to the determined rank and the obtained precoding matrix indication.
For a detailed description, reference may be made to relevant contents of tables 1 to 3 in the corresponding embodiment of fig. 1.
In this embodiment, for the case that the codebook for uplink multi-antenna data transmission adopts the single codebook structure, the relay node obtains, through RRC signaling, a rank indication sent by the base station after selecting the rank for uplink multi-antenna data transmission, and further obtains, through DCI, a precoding matrix indication sent by the base station after selecting the precoding matrix for uplink multi-antenna data transmission, so as to avoid a problem that in the prior art, when the base station schedules the user equipment under the relay node, the number of bits occupied in the DCI is large due to the DCI sending the rank indication, thereby reducing the overhead of the DCI.
Fig. 7 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, which is suitable for a case where a codebook for uplink multi-antenna data transmission adopts a dual-codebook structure. As shown in fig. 7, the method for processing uplink multi-antenna data transmission indication in this embodiment may include:
701. the relay node obtains a rank indication sent by the base station through RRC signaling;
702. the relay node determines the rank of the rank indication identifier according to the rank indication;
703. the relay node obtains two precoding matrix indications sent by the base station through DCI;
the precoding matrix of one precoding matrix indicator is used for representing long-term or broadband channel characteristics and is recorded as a first precoding matrix indicator, and the precoding matrix of the other precoding matrix indicator is used for representing short-term or narrowband channel characteristics and is recorded as a second precoding matrix indicator.
704. And the relay node determines a precoding matrix according to the determined rank and the obtained two precoding matrix indicators, namely the precoding matrix of the first precoding matrix indicator and the precoding matrix of the second precoding matrix indicator.
In this embodiment, for the case that the codebook for uplink multi-antenna data transmission adopts the dual codebook structure, the relay node obtains, through RRC signaling, a rank indication sent by the base station after selecting a rank for uplink multi-antenna data transmission, and further obtains, through DCI, a first precoding matrix indication and a second precoding matrix indication sent by the base station after selecting two precoding matrices for uplink multi-antenna data transmission, which can avoid the problem that in the prior art, when the base station schedules the user equipment under the relay node, the number of bits occupied in DCI is large due to DCI sending the rank indication, thereby reducing the overhead of DCI.
Fig. 8 is a flowchart illustrating a processing method for uplink multi-antenna data transmission indication according to another embodiment of the present invention, which is suitable for a case where a codebook for uplink multi-antenna data transmission adopts a dual-codebook structure. As shown in fig. 8, the method for processing uplink multi-antenna data transmission indication in this embodiment may include:
801. the relay node obtains a rank indication and a precoding matrix indication sent by the base station through RRC signaling;
wherein, a precoding matrix of a precoding matrix indicator is used for representing long-term or broadband channel characteristics and is marked as a first precoding matrix indicator,
802. the relay node determines the rank of the rank indication identifier according to the rank indication, and determines a precoding matrix according to the rank indication and the first precoding matrix indication;
803. the relay node obtains another precoding matrix indication sent by the base station through DCI;
and the precoding matrix of the other precoding matrix indicator is used for representing the short-term or narrowband channel characteristics and is marked as a second precoding matrix indicator.
804. And the relay node determines another precoding matrix according to the determined rank and the obtained second precoding matrix indication.
In this embodiment, for the case that the codebook for uplink multi-antenna data transmission adopts a dual codebook structure, the relay node obtains, through RRC signaling, a rank indication and a first precoding indication that are sent by the base station after selecting a rank and a precoding matrix for uplink multi-antenna data transmission, and further obtains, through DCI, a second precoding matrix indication that is sent by the base station after selecting another precoding matrix for uplink multi-antenna data transmission, so that a problem of a large number of bits occupied in DCI due to DCI sending the rank indication when the base station schedules the user equipment under the relay node in the prior art can be avoided, thereby further reducing the overhead of DCI.
For a detailed description, reference may be made to tables 5 to 11.
The technical scheme of the invention can be applied to communication systems such as an LTE system, an LTE-A system and the like. The base station can be an eNB in an LTE system or an LTE-A system.
It should be noted that: while, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
Fig. 9 is a schematic structural diagram of a processing apparatus for uplink multi-antenna data transmission indication according to another embodiment of the present invention, and as shown in fig. 9, the processing apparatus for uplink multi-antenna data transmission indication according to this embodiment may include a selecting unit 91 and a sending unit 92. The selecting unit 91 is configured to select a rank and a precoding matrix for uplink multi-antenna data transmission; the transmitting unit 92 is configured to transmit a precoding matrix indicator corresponding to the precoding matrix selected by the selecting unit 91 to the relay node, and transmit a rank indicator corresponding to the rank selected by the selecting unit 91 to the relay node through RRC signaling, so that the relay node determines the precoding matrix according to the precoding matrix indicator and the rank indicator.
The functions of the base station in the embodiment corresponding to fig. 1 may be implemented by the processing device for uplink multi-antenna data transmission indication provided in this embodiment.
Optionally, the precoding matrix selected by the selecting unit 91 in this embodiment may include a first precoding matrix; accordingly, the transmitting unit 92 may further transmit a precoding matrix indicator corresponding to the first precoding matrix selected by the selecting unit 91 to the relay node through the first downlink control information or the RRC signaling.
Optionally, the precoding matrix selected by the selecting unit 91 in this embodiment may include a second precoding matrix and a third precoding matrix; correspondingly, the sending unit 92 may further send, to the relay node, a precoding matrix indicator corresponding to the second precoding matrix selected by the selecting unit 91 and a precoding matrix indicator corresponding to the third precoding matrix through the second downlink control information; or may further send, to the relay node, a precoding matrix indicator corresponding to the second precoding matrix selected by the selecting unit 91 through the RRC signaling, and send, to the relay node, a precoding matrix indicator corresponding to the third precoding matrix selected by the selecting unit 91 through third downlink control information.
Wherein, the second precoding matrix may be used to represent long-term channel characteristics, and the third precoding matrix may be used to represent short-term channel characteristics; or
The second precoding matrix may be used to represent wideband channel characteristics, and the third precoding matrix may be used to represent narrowband channel characteristics; or
The second precoding matrix may be used to represent long-term and wideband channel characteristics, and the third precoding matrix may be used to represent at least one of short-term and narrowband channel characteristics.
In this embodiment, after the selecting unit selects the rank and the precoding matrix for uplink multi-antenna data transmission, the transmitting unit transmits the precoding matrix indication corresponding to the precoding matrix selected by the selecting unit to the relay node, and transmits the rank indication corresponding to the rank selected by the selecting unit to the relay node through the RRC signaling, so as to avoid a problem that a base station in the prior art occupies a large number of bits in DCI due to DCI transmission rank indication when scheduling a user equipment under the relay node, thereby reducing DCI overhead.
Fig. 10 is a schematic structural diagram of a processing apparatus for uplink multi-antenna data transmission indication according to another embodiment of the present invention, and as shown in fig. 10, the processing apparatus for uplink multi-antenna data transmission indication according to this embodiment may include an obtaining unit 1001 and a determining unit 1002. The obtaining unit 1001 is configured to obtain a precoding matrix indicator sent by a base station, and obtain a rank indicator sent by the base station through RRC signaling; determining unit 1002 is configured to determine a precoding matrix according to the precoding matrix indicator and the rank indicator obtained by obtaining unit 1001.
The functions of the base station in the embodiment corresponding to fig. 2 may be implemented by the processing device for uplink multi-antenna data transmission indication provided in this embodiment.
Optionally, if the codebook for uplink multi-antenna data transmission adopts a single codebook structure (that is, the relay node performs uplink multi-antenna data transmission by using one precoding matrix), then further, the precoding matrix indicator sent by the base station and obtained by the obtaining unit 1001 in this embodiment may include the first precoding matrix indicator. Accordingly, the obtaining unit 1001 may specifically obtain the first precoding matrix indicator sent by the base station through the first DCI or the RRC signaling.
Optionally, if the codebook for uplink multi-antenna data transmission adopts a dual-codebook structure (that is, the relay node constructs a final precoding matrix by using two precoding matrices to perform uplink multi-antenna data transmission), then further, the precoding matrix indication sent by the base station, obtained by the obtaining unit 1001 in this embodiment, may include a second precoding matrix indication and a third precoding matrix indication; accordingly, the obtaining unit 1001 may specifically obtain, through the second DCI, the second precoding matrix indicator and the third precoding matrix indicator sent by the base station, or may also obtain, through the RRC signaling, the second precoding matrix indicator sent by the base station, and obtain the third precoding matrix indicator through the third DCI.
Wherein, the second precoding matrix may be used to represent long-term channel characteristics, and the third precoding matrix may be used to represent short-term channel characteristics; or
The second precoding matrix may be used to represent wideband channel characteristics, and the third precoding matrix may be used to represent narrowband channel characteristics; or
The second precoding matrix may be used to represent long-term and wideband channel characteristics, and the third precoding matrix may be used to represent at least one of short-term and narrowband channel characteristics.
In this embodiment, the relay node obtains, by the obtaining unit, a precoding matrix indicator sent by the base station after selecting the precoding matrix for uplink multi-antenna data transmission, and obtains, by the RRC signaling, a rank indicator sent by the base station after selecting the rank for uplink multi-antenna data transmission, so that the determining unit can determine the precoding matrix according to the precoding matrix indicator and the rank indicator obtained by the obtaining unit, which can avoid a problem that a number of bits occupied in DCI is large due to DCI sending the rank indicator when the base station schedules the user equipment under the relay node in the prior art, thereby reducing the overhead of DCI.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A processing method for uplink multi-antenna data transmission indication is characterized by comprising the following steps:
the base station selects a rank and a precoding matrix for uplink multi-antenna data transmission;
the base station sends a precoding matrix indication corresponding to the selected precoding matrix to a relay node, and sends a rank indication corresponding to the selected rank to the relay node through Radio Resource Control (RRC) signaling, so that the relay node determines a precoding matrix according to the precoding matrix indication and the rank indication;
the precoding matrix comprises a second precoding matrix and a third precoding matrix, wherein the second precoding matrix is used for representing long-term channel characteristics, and the third precoding matrix is used for representing short-term channel characteristics;
the base station sends the precoding matrix indication corresponding to the selected precoding matrix to the relay node, and the method comprises the following steps:
the base station sends a precoding matrix indication corresponding to the selected second precoding matrix and a precoding matrix indication corresponding to a third precoding matrix to the relay node through second downlink control information; or
The base station sends a precoding matrix indication corresponding to the selected second precoding matrix to the relay node through the RRC signaling, and sends a precoding matrix indication corresponding to the selected third precoding matrix to the relay node through third downlink control information;
or,
the precoding matrix comprises a second precoding matrix and a third precoding matrix, wherein the second precoding matrix is used for representing the channel characteristics of a wideband, and the third precoding matrix is used for representing the channel characteristics of a narrowband;
the base station sends the precoding matrix indication corresponding to the selected precoding matrix to the relay node, and the method comprises the following steps:
the base station sends a precoding matrix indication corresponding to the selected second precoding matrix and a precoding matrix indication corresponding to a third precoding matrix to the relay node through second downlink control information; or
The base station sends a precoding matrix indication corresponding to the selected second precoding matrix to the relay node through the RRC signaling, and sends a precoding matrix indication corresponding to the selected third precoding matrix to the relay node through third downlink control information;
or,
the precoding matrix comprises a second precoding matrix and a third precoding matrix, wherein the second precoding matrix is used for representing long-term and broadband channel characteristics, and the third precoding matrix is used for representing at least one of short-term channel characteristics and narrowband channel characteristics;
the base station sends the precoding matrix indication corresponding to the selected precoding matrix to the relay node, and the method comprises the following steps:
the base station sends a precoding matrix indication corresponding to the selected second precoding matrix and a precoding matrix indication corresponding to a third precoding matrix to the relay node through second downlink control information; or
And the base station sends a precoding matrix indication corresponding to the selected second precoding matrix to the relay node through the RRC signaling, and sends a precoding matrix indication corresponding to the selected third precoding matrix to the relay node through third downlink control information.
2. A processing method for uplink multi-antenna data transmission indication is characterized by comprising the following steps:
the relay node obtains a precoding matrix indication sent by the base station and obtains a rank indication sent by the base station through Radio Resource Control (RRC) signaling;
the relay node determines a precoding matrix according to the precoding matrix indication and the rank indication;
the precoding matrix comprises a second precoding matrix indicator and a third precoding matrix indicator, wherein the precoding matrix of the second precoding matrix indicator is used for representing long-term channel characteristics, and the precoding matrix of the third precoding matrix indicator is used for representing short-term channel characteristics;
the method for the relay node to obtain the precoding matrix indication sent by the base station comprises the following steps:
the relay node obtains a second precoding matrix indication and a third precoding matrix indication sent by the base station through second downlink control information; or
The relay node obtains a second precoding matrix indication sent by the base station through the RRC signaling, and obtains a third precoding matrix indication through third downlink control information;
or the precoding matrix comprises a second precoding matrix indicator and a third precoding matrix indicator, wherein the precoding matrix of the second precoding matrix indicator is used for representing the channel characteristics of the wideband, and the precoding matrix of the third precoding matrix indicator is used for representing the channel characteristics of the narrowband;
the method for the relay node to obtain the precoding matrix indication sent by the base station comprises the following steps:
the relay node obtains a second precoding matrix indication and a third precoding matrix indication sent by the base station through second downlink control information; or
The relay node obtains a second precoding matrix indication sent by the base station through the RRC signaling, and obtains a third precoding matrix indication through third downlink control information;
or the precoding matrix comprises a second precoding matrix indicator and a third precoding matrix indicator, wherein the precoding matrix of the second precoding matrix indicator is used for representing the long-term and wideband channel characteristics, and the precoding matrix of the third precoding matrix indicator is used for representing at least one of the short-term channel characteristics and the narrowband channel characteristics; the method for the relay node to obtain the precoding matrix indication sent by the base station comprises the following steps:
the relay node obtains a second precoding matrix indication and a third precoding matrix indication sent by the base station through second downlink control information; or
And the relay node obtains a second precoding matrix indication sent by the base station through the RRC signaling and obtains a third precoding matrix indication through third downlink control information.
3. An apparatus for processing uplink multi-antenna data transmission indication, comprising:
a selecting unit, configured to select a rank and a precoding matrix for uplink multi-antenna data transmission;
a sending unit, configured to send a precoding matrix indicator corresponding to the precoding matrix selected by the selecting unit to a relay node, and send a rank indicator corresponding to the rank selected by the selecting unit to the relay node through radio resource control RRC signaling, so that the relay node determines a precoding matrix according to the precoding matrix indicator and the rank indicator;
the precoding matrix comprises a second precoding matrix and a third precoding matrix, wherein the second precoding matrix is used for representing long-term channel characteristics, and the third precoding matrix is used for representing short-term channel characteristics;
the transmitting unit is specifically configured to transmit, to the relay node, a precoding matrix indicator corresponding to the second precoding matrix selected by the selecting unit and a precoding matrix indicator corresponding to the third precoding matrix through second downlink control information; or
Sending a precoding matrix indication corresponding to the second precoding matrix selected by the selection unit to the relay node through the RRC signaling, and sending a precoding matrix indication corresponding to a third precoding matrix selected by the selection unit to the relay node through third downlink control information;
or the precoding matrix comprises a second precoding matrix and a third precoding matrix, wherein the second precoding matrix is used for representing the channel characteristics of the wideband, and the third precoding matrix is used for representing the channel characteristics of the narrowband;
the transmitting unit is specifically configured to transmit, to the relay node, a precoding matrix indicator corresponding to the second precoding matrix selected by the selecting unit and a precoding matrix indicator corresponding to the third precoding matrix through second downlink control information; or
Sending a precoding matrix indication corresponding to the second precoding matrix selected by the selection unit to the relay node through the RRC signaling, and sending a precoding matrix indication corresponding to a third precoding matrix selected by the selection unit to the relay node through third downlink control information;
or the precoding matrix comprises a second precoding matrix and a third precoding matrix, wherein the second precoding matrix is used for representing long-term and broadband channel characteristics, and the third precoding matrix is used for representing at least one of short-term channel characteristics and narrowband channel characteristics;
the transmitting unit is specifically configured to transmit, to the relay node, a precoding matrix indicator corresponding to the second precoding matrix selected by the selecting unit and a precoding matrix indicator corresponding to the third precoding matrix through second downlink control information; or
And sending a precoding matrix indication corresponding to the second precoding matrix selected by the selection unit to the relay node through the RRC signaling, and sending a precoding matrix indication corresponding to the third precoding matrix selected by the selection unit to the relay node through third downlink control information.
4. An apparatus for processing uplink multi-antenna data transmission indication, comprising:
the device comprises an obtaining unit, a calculating unit and a transmitting unit, wherein the obtaining unit is used for obtaining a precoding matrix indication sent by a base station and obtaining a rank indication sent by the base station through Radio Resource Control (RRC) signaling;
a determining unit, configured to determine a precoding matrix according to the precoding matrix indicator and the rank indicator obtained by the obtaining unit;
the precoding matrix comprises a second precoding matrix indicator and a third precoding matrix indicator, wherein the precoding matrix of the second precoding matrix indicator is used for representing long-term channel characteristics, and the precoding matrix of the third precoding matrix indicator is used for representing short-term channel characteristics;
the obtaining unit is specifically configured to obtain a second precoding matrix indicator and a third precoding matrix indicator sent by the base station through second downlink control information; or
Obtaining a second precoding matrix indication sent by the base station through the RRC signaling, and obtaining a third precoding matrix indication through third downlink control information;
or,
the precoding matrix comprises a second precoding matrix indicator and a third precoding matrix indicator, wherein the precoding matrix of the second precoding matrix indicator is used for representing the channel characteristics of a wideband, and the precoding matrix of the third precoding matrix indicator is used for representing the channel characteristics of a narrowband;
the obtaining unit is specifically configured to obtain, through second downlink control information, a second precoding matrix indicator and a third precoding matrix indicator that are sent by the base station; or
Obtaining a second precoding matrix indication sent by the base station through the RRC signaling, and obtaining a third precoding matrix indication through third downlink control information;
or,
the precoding matrix comprises a second precoding matrix indicator and a third precoding matrix indicator, wherein the precoding matrix of the second precoding matrix indicator is used for representing long-term and broadband channel characteristics, and the precoding matrix of the third precoding matrix indicator is used for representing at least one of short-term channel characteristics and narrowband channel characteristics;
the obtaining unit is specifically configured to obtain, through second downlink control information, a second precoding matrix indicator and a third precoding matrix indicator that are sent by the base station; or
And acquiring a second precoding matrix indication sent by the base station through the RRC signaling, and acquiring a third precoding matrix indication through third downlink control information.
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| CN108631838A (en) * | 2017-03-24 | 2018-10-09 | 华为技术有限公司 | The sending method of signaling, device and system |
| CN109152035B (en) * | 2017-06-16 | 2022-05-06 | 大唐移动通信设备有限公司 | Method and device for sending Downlink Control Information (DCI) |
| EP4348857A4 (en) * | 2022-03-03 | 2024-07-24 | ZTE Corporation | Method for uplink transmission |
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| CN101610523A (en) * | 2008-06-20 | 2009-12-23 | 大唐移动通信设备有限公司 | The method and system of reporting channel information in a kind of tdd systems |
| CN101615979A (en) * | 2008-06-24 | 2009-12-30 | 华为技术有限公司 | Feedback indication method in the multiaerial system, system and equipment |
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