Method for Resource allocation, Method for Channel State Information Transmission,
Base Station and User Equipment
Technical Field
The present invention relates to the field of wireless communication, and in
particular to a method for resource allocation, method for channel state information
transmission, base station and user equipment.
Background Art
In a long-term evolution (LTE) system, a user equipment (UE) obtains channel
state information (CSI) in downlink by measuring a downlink reference signal, and
reports to a base station via an uplink, the CSI comprising a channel quality indicator
(CQI) of the downlink, and also information of precoding matrix indicator (PMI) and
rank indication (RI) for some downlink transmission mode. The above CSI, as well as
ACK/NACK information and scheduling request (SR), are collectively referred to as
uplink control information (UCI). The UCI may contain one piece of the above
information only, or more pieces of the above information. The base station selects
typical modulation and coding scheme, multi-antenna processing and hybrid
automatic repeat request (HARQ) on the basis of the UCI reported by the UE, and
adaptively adjusts data transmission dynamically.
Currently, the CSI in the UCI may be reported periodically and aperiodically.
Here, for the sake of convenience, the CSI reported periodically is referred to as
periodic CSI, and the CSI reported aperiodically is referred to as aperiodic CSI.
Generally, UCI containing periodic CSI is transmitted on a physical uplink control
channel (PUCCH), and UCI containing aperiodic CSI is transmitted on a physical
uplink shared channel (PUSCH), which may be multiplexed with uplink data (such as
UL-SCH (uplink shared channel) data), and may also be transmitted separately on a
PUSCH when there is no uplink data.
When it is necessary for a UE to report aperiodic CSI, the following manner may
be used: when a base station requires a user equipment to report aperiodic CSI, the

base station transmits downlink control information (DCI) to the UE, so as to instruct
the UE to report aperiodic CSI and allocate corresponding PUSCH resources used for
reporting the aperiodic CSI to the UE; when the UE receives the DCI, it reports
aperiodic CSI by using the resources instructed in the DCI, and has the CSI contained
in the UCI and transmitted to the base station via the PUSCH.
In an LTE system, one bit in a DCI format 0 is used to trigger a UE to report
aperiodic CSI. In an advanced long-term evolution (LTE-A) system, since the system
may support the transmission of multiple component carriers (CCs), and may support
at most five CCs at present, so, in order to instruct a UE to report UCIs of multiple
downlink CCs flexibly, two bits in DCI format 0/DCI format 4 are used to trigger a
UE to report aperiodic CSI, and the UE is indicated to report the indices and the
number of the corresponding downlink CCs.
In the implementation of the present invention, this applicant found that
following defects exist in the prior art:
In an LTE system, each UE is configured with only one pair of uplink and
downlink CCs. When the UE transmits UCI containing aperiodic CSI on a PUSCH
with no data, a base station allocates four resource blocks (RBs) to the UE at most,
and ensures the correct receiving of the UCI containing aperiodic CSI by using a
reasonable channel encoding rate.
However, in an LTE-A system, with the number of CCs increases, the length of
the UCI also increases. If the base station allocates four RBs to the UE at most, the
resources allocated by the base station to the UE for transmitting the UCI containing
aperiodic CSI are possibly insufficient. Hence, the correct receiving of the UCI by the
base station cannot be ensured, and limitation of the scheduling of the data
transmission by the base station is increased. No solution has been found till now to
overcome the above defects.
It should be noted that the above description of the background art is merely
provided for clear arid complete explanation of the present invention and for easy
understanding by those skilled in the art. And it should not be understood that the
above technical solution is known to those skilled in the art as it is described in the

background art of the present invention.
Summary of the Invention
The embodiments of the present invention provide a method for resource
allocation, method for CDI transmission, base station and UE. The base station may
allocate resources according to the number of relevant downlink CCs to which the
aperiodic CSI needing to be reported by the UE corresponds, such that the manner of
resource allocation is flexible, and supports the transmission of UCI containing
aperiodic CSI in case of multiple carriers, thereby efficiently improving the
probability of correct receiving of the UCI and reducing the limitation of the
scheduling of the data transmission.
An aspect according to the embodiments of the present invention provides a
method for resource allocation, comprising:
determining, by a base station, that a UE should report aperiodic CSI of relevant
downlink CCs; and allocating, by the base station, corresponding resources to the UE
according to the number of the relevant downlink CCs.
Another aspect according to the embodiments of the present invention provides a
base station, comprising:
a first determining unit for determining that a UE should report aperiodic CSI of
relevant downlink CCs; and
a resource allocating unit for allocating corresponding resources to the UE
according to the number of the relevant downlink CCs.
A still another aspect according to the embodiments of the present invention
provides a transmission method for UCI, comprising:
generating by a base station downlink control information, the downlink control
information comprising indication information which indicates a UE whether to report
aperiodic CSI of relevant downlink CCs and indicates the indices and number of the
relevant downlink CCs when reporting the aperiodic CSI of the relevant downlink
CCs, the index of modulation and coding scheme, and used resources; wherein the
used resources are resources allocated to the UE by the base station according to the

number of the relevant downlink CCs; and
transmitting the downlink control information to the UE by the base station, so
that the UE transmits the aperiodic CSI according to the indication information, the
index of modulation and coding scheme and the used resources.
A further still another aspect according to the embodiments of the present
invention provides a transmission method for CSI, comprising:
receiving, by UE, downlink control information transmitted by a base station, the
downlink control information comprising indication information which indicates the
UE whether to report aperiodic CSI of relevant downlink CCs and indicates the
indices and number of the relevant downlink CCs when reporting the aperiodic CSI of
the relevant downlink CCs, the index of modulation and coding scheme, and used
resources; wherein the used resources are resources allocated to the UE by the base
station according to the number of the relevant downlink CCs; and
transmitting by the UE the aperiodic CSI according to the indication information,
the index of modulation and coding scheme and the used resources contained in the
downlink control information.
A further still another aspect according to the embodiments of the present
invention provides a base station, comprising:
an information generating unit for generating downlink control information, the
downlink control information comprising indication information which indicates UE
whether to report aperiodic CSI of relevant downlink CCs and indicates the indices
and number of the relevant downlink CCs when reporting the aperiodic CSI of the
relevant downlink CCs, an index of modulation and coding scheme, and used
resources; wherein the used resources are resources allocated to the UE by the base
station according to the number of the relevant downlink CCs; and
a first information transmitting unit for transmitting the downlink control
information to the UE, so that the UE transmits the aperiodic CSI according to the
indication information, the index of modulation and coding scheme, and the used
resources contained in the downlink control information.
A further still another aspect according to the embodiments of the present

invention provides a UE, comprising:
an information receiving unit for receiving downlink control information
transmitted by a base station, the downlink control information comprising indication
information which indicates the UE whether to report aperiodic CSI of relevant
downlink CCs and indicates the indices and number of the relevant downlink CCs
when reporting the aperiodic CSI of the relevant downlink CCs, an index of
modulation and coding scheme, and used resources; wherein the used resources are
resources allocated to the UE by the base station according to the number of the
relevant downlink CCs; and
a second information transmitting unit for transmitting the aperiodic CSI
according to the indication information, the index of modulation and coding scheme
and the used resources contained in the downlink control information.
A further still another aspect according to the embodiments of the present
invention provides a storage medium in which a computer-readable program is stored,
wherein the computer-readable program enables the computer to carry out the method
for allocating resources as described above in a base station.
A further still another aspect according to the embodiments of the present
invention provides a computer-readable program, wherein when the program is
executed in a base station, the program enables the computer to carry out the
transmission method for CSI as described above in the base station.
A further still another aspect according to the embodiments of the present
invention provides a storage medium in which a computer-readable program is stored,
wherein the computer-readable program enables the computer to carry out the
transmission method for CSI as described above in a base station.
A further still another aspect according to the embodiments of the present
invention provides a computer-readable program, wherein when the program is
executed in UE, the program enables the computer to carry out the transmission
method for CSI as described above in the UE.
A further still another aspect according to the embodiments of the present
invention provides a storage medium in which a computer-readable program is stored,

wherein the computer-readable program enables the computer to carry out the
transmission method for CSI as described above in UE.
The advantages of the present invention exist in that the base station may allocate
resources according to the number of relevant downlink CCs to which the aperiodic
CSI needing to be reported by the UE corresponds, such that the manner of resource
allocation is flexible, and supports the transmission of UCI containing aperiodic CSI
in case of multiple carriers, thereby efficiently improving the probability of correct
receiving of the UCI and reducing the limitation of the scheduling of the data
transmission.
With reference to the following description and drawings, the particular
embodiments of the present invention are disclosed in detail, and the principle of the
present invention and the manners of use are indicated. It should be understood that
the scope of the embodiments of the present invention is not limited thereto. The
embodiments of the present invention contain many alternations, modifications and
equivalents within the spirits and scope of the terms of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may
be used in the same way or in a similar way in one or more other embodiments and/or
in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used in this
specification is taken to specify the presence of stated features, integers, steps or
components but does not preclude the presence or addition of one or more other
features, integers, steps, components or groups thereof.
Brief Description of the Drawings
The above and other objects, features and advantages of the embodiments of the
present invention will become more obvious from the following description with
reference to the drawings. In the drawings:
Figure 1 is a flowchart of the method for resource allocation of embodiment 1 of
the present invention;
Figure 2 is a schematic diagram of the structure of the base station of

embodiment 2 of the present invention;
Figure 3 is a schematic diagram of the structure of the resource allocating unit of
embodiment 2 of the present invention;
Figure 4 is a flowchart of the method for transmitting UCI of embodiment 3 of
the present invention;
Figure 5 is a schematic diagram of the structure of the base station of
embodiment 4 of the present invention;
Figure 6 is a flowchart of the method for transmitting UCI of embodiment 5 of
the present invention;
Figure 7 is a flowchart of implementation of step 602 of embodiment 5 of the
present invention;
Figure 8 is a flowchart of implementation of step 703 of embodiment 5 of the
present invention;
Figure 9 is a schematic diagram of the structure of the UE of embodiment 6 of the
present invention;
Figure 10 is a schematic diagram of the structure of the second information
transmitting unit of Fig. 9;
Figure 11 is a schematic diagram of the structure of the second judging unit of
Fig. 10;
Figure 12 is a flowchart of the method for transmitting UCI at a base station side
of embodiment 7 of the present invention; and
Figure 13 is a flowchart of the method for transmitting UCI at a UE side of
embodiment 7 of the present invention.
Detailed Description of the Invention
The preferred embodiments of the present invention are described as follows with
reference to the drawings. These embodiments are illustrative only and are not
intended to limit the present invention. For easy understanding of the principle and
embodiments of the present invention by those skilled in the art, the embodiments of
the present invention are described taking an LTE-A system with a bandwidth of 10

MHz as an example. However, it should be understood that the present invention is
not limited to the above system and is applicable to other systems related to aperiodic
CSI transmission of multiple carriers.
Fig. 1 is a flowchart of the method for resource allocation of embodiment 1 of the
present invention. As shown in Fig. 1, the method comprises:
step 101: determining, by a base station, that a UE should report aperiodic CSI of
relevant downlink CCs; and
step 102: allocating, by the base station, corresponding resources to the UE
according to the number of the relevant downlink CCs.
It can be seen from the above embodiment that the base station may allocate
resources according to the number of relevant downlink CCs to which the aperiodic
CSI needing to be reported by the UE corresponds, such that the manner of resource
allocation is flexible, and supports the transmission of UCI containing aperiodic CSI
in case of multiple carriers, thereby overcoming the defect existed in the prior art.
In this embodiment, the aperiodic CSI may comprise a CQI, and also information
of PMI and RI for some downlink transmission modes.
In this embodiment, the aperiodic CSI may be contained in UCI and be
transmited to the base station via a PUSCH. In addition, ACK/NACK information
may also be contained in the UCI together with the CSI for transmitting to the base
station via a PUSCH. Whether the ACK/NACK information is transmitted together
with the CSI is similar to the prior art, which shall not described any further. In this
way, the base station may select typical modulation and coding scheme, multi-antenna
processing and HARQ on the basis of the UCI reported by the UE, and adaptively
adjusts data transmission dynamically.
In this embodiment, the number of the relevant downlink CCs may be one or
more, and the base station allocates resources to the UE according to the number of
the relevant downlink CCs.
In this embodiment, the method of allocating by the base station corresponding
resources to the UE according to the number of the relevant downlink CCs may as
follows:

the maximum number of the resource blocks (RBs) allocated by the base station
to the UE is a predefined first number LI if the base station determines that it is
necessary for the UE to report the aperiodic CSI of one downlink CC; and the
maximum number of the RBs allocated by the base station to the UE is a predefined
second number L2 if the base station determines that it is necessary for the UE to
report the aperiodic CSI of more than one downlink CCs;
wherein the second number L2 is greater than the first number LI, and the first
number LI and the second number L2 are determined according to a CCR (Channel
Coding Rate). The CCR is within a predefined range by determining the first number
LI and the second number L2. Of course, in some cases, it is possible that the use of
the above first number LI and the second number L2 will make the CCR out of a
reasonable range. However, such cases are seldom. Hence, the above first number LI
and the second number L2 are usually considered as being reasonable.
Following description is provided for the above first number LI and the second
number L2 taking one downlink CC and two downlink CCs as examples.
When there is one downlink CC, such as a case similar to an LTE system, if a
predefined CCR is less than 1/3, the maximum of the first number LI is 4, that is, the
base station allocates 4 RBs to the UE at most, which makes the CCR within a
reasonable range.
Where there are multiple CCs, taking two CCs as an example, if the CCR is still
1/3, the second number L2 should be any value greater than 4. However, in this
embodiment, in order not to affect the normal transmission of other data or
information in the system, when CSI is contained in UCI for transmission, the second
number L2 should be kept as small as possible on the premise that the correct
receiving of the UCI is ensured.
Table 1 shows the corresponding values of the CCR in the transmission of various
UCI and sounding reference signals (SRSs) in three typical cases of bit lengths of
aperiodic CSI (i.e. the payload is 100, 136 and 144, respectively) when the number of
the downlink CCs is 2 and the number of the allocated resources is 4. Table 2 shows
corresponding values of the CCR in the transmission of various UCI and SRSs in

three typical cases of bit lengths of aperiodic CSI when the number of the downlink
CCs is 2 and the number of the allocated resources is 5. Table 3 shows corresponding
values of the CCR in the transmission of various UCI and SRSs in three typical cases
of bit lengths of aperiodic CSI when the number of the downlink CCs is 2 and the
number of the allocated resources is 6.
It can be seen from Table 1 that when the number of the downlink CCs is 2, if 4
RBs are still allocated, when the payload of the aperiodic CSI is respectively 136 and
144, the CCR goes beyond the predefined range in the transmission of CQI+A/N+RI
or in the transmission of CQI+A/N+SRS+RI; and when the payload of the aperiodic
CSI is 100, the CCR goes beyond the predefined range in the transmission of
CQI+A/N+SRS+RI. Thus, the correct receiving of the UCI by the base station cannot
be ensured.
Table 1



It can be seen from Table 2 that if the number of the RBs is 5, the CCR goes
beyond the predefined range only when the payload of the aperiodic CSI is 136 and
CP=144, and the CQI+A/N+SRS+RI is transmitted. However, the case of transmitting
CQI+A/N+SRS+RI is seldom. Hence, the number of the RBs being 5 is considered as
being a reasonable number.
It can be seen from Table 3 that if the number of the RBs is 6, the CCR is within
the predefined range.
It can be seen from above that in determining the number of the allocated
resources, not only to make the CCR within a reasonable range, but also to make the
number of resources as small as possible are both should be considered, so as to
alleviate the effect on the transmission of other resources. It has been proved that it is
optimal when the maximum value of the second number L2 is 5 or 6 in case of two
CCs.
The case of two CCs is explained above. For cases of more than two CCs, the
methods for determining the second number L2 are similar to what is described above.
In addition, the method for calculating CCR is similar to the prior art, which shall not
be described any further.
It can be seen from the above embodiment that the base station may allocate
resources according to the number of relevant downlink CCs to which the aperiodic

CSI needing to be reported by the UE corresponds, such that the manner of resource
allocation is flexible, and supports the transmission of UCI containing aperiodic CSI
in case of multiple carriers, thereby overcoming the defect existed in the prior art.
It should be understood by those skilled in the art that all or part of the steps in
the method of the above embodiment may be carried out by relevant hardware with
instructions from a program. The program may be stored in a computer-readable
storage medium. All or part of the steps in the method of the above embodiment may
be included in the execution of this program. The storage medium may comprise an
ROM, an RAM, a floppy disc, and a CD, etc.
The embodiments of the present invention also provide a base station as
described below. Since the principle of the base station for solving the problems is
similar to that of the method for resource allocation based on a base station, the
embodiments of the method may be referred to in the embodiments of the base station,
and the similar parts shall not be described any further.
Fig. 2 is a schematic diagram of the structure of the base station of embodiment 2
of the present invention. As shown in Fig. 2, the base station comprises: a first
determining unit 201 and a resource allocating unit 202; wherein
the first determining unit 201 is used for determining that a UE should report
aperiodic CSI of relevant downlink CCs, and the resource allocating unit 202 is used
for allocating corresponding resources to the UE according to the number of the
relevant downlink CCs.
Fig. 3 is a schematic diagram of the structure of the resource allocating unit of
Fig. 2. As shown in Fig. 3, the resource allocating unit 202 may comprise a first
resource allocating unit 301 and a second resource allocating unit 302; wherein the
first resource allocating unit 301 is used for allocating maximum resources of a
predefined first number LI to the UE if the first determining unit 201 determines that
it is necessary for the UE to report the aperiodic CSI of one downlink CC,
the second resource allocating unit 302 is used for allocating maximum resources
of a predefined second number L2 to the UE if the first determining unit 201
determines that it is necessary for the UE to report the aperiodic CSI of more than one

downlink CCs;
wherein the second number L2 is greater than the first number LI, and the first
number LI and the second number L2 are determined according to a CCR.
In this embodiment, the manner for determining the first number LI and the
second number L2 is as described in embodiment 1, and shall not be described any
further.
It can be seen from the above embodiment that the base station may allocate
resources according to the number of relevant downlink CCs to which the aperiodic
CSI needing to be reported by the UE corresponds, such that the manner of resource
allocation is flexible, and supports the transmission of UCI containing aperiodic CSI
in case of multiple carriers, thereby overcoming the defect existed in the prior art.
Fig. 4 is a flowchart of the method for UCI transmission of embodiment 3 of the
present invention. As shown in Fig. 4, the method comprises:
step 401: generating by a base station DCI, the DCI comprising indication
information which indicates a UE whether to report aperiodic CSI of relevant
downlink CCs and indicates the indices and number of the relevant downlink CCs
when reporting the aperiodic CSI of the relevant downlink CCs, the index of
modulation and coding scheme, and used resources; wherein the used resources are
resources allocated to the UE by the base station according to the number of the
relevant downlink CCs; and
step 402: transmitting the DCI to the UE by the base station, so that the UE
transmits the aperiodic CSI according to the indication information, the index of
modulation and coding scheme and the used resources contained in the DCI.
In this embodiment, in step 401, when the base station determines that it is
necessary for the UE to report the aperiodic CSI of the relevant downlink CCs, it can
generate the DCI according to the transmission mode and the demand of the system,
so as to instruct the UE to report the UCI; wherein in generating the DCI, the base
station allocates the used resources to the UE according to the number of the relevant
downlink CCs. Furthermore, corresponding indication information and a predefined
index of modulation and coding scheme may be selected according to preconfigured

corresponding relationship between the indication information and the downlink CCs.
In this embodiment, an existing method may be used in the process of generating
the DCI, which shall not be described any further. In addition, the method of
allocating the used resources to the UE by the base station according to the number of
the relevant downlink CCs is as described in embodiment 1, and shall not be
described any further.
In this embodiment, the DCI generated in step 101 may be transmitted in a
physical downlink control channel (PDCCH), wherein the bit information in DCI
format 0 or DCI format 4 may be used for bearing this information.
Table 4 shows the bear information and length of the DCI format 0 in the LTE-A
system of the embodiments of the present invention, and Table 5 shows the bear
information and length of the DCI format 4 in the LTE-A system of the embodiments
of the present invention.



Wherein, the "CQI request" with 2 bits in Table 4 or Table 5 may be used to bear
the above indication information. Hence, the corresponding states may be "00", "01",
"10" and "11". The above four states may be respectively used to indicate whether to
report aperiodic CSI, and a set of different downlink CCs in indicating to report
aperiodic CSI.
For example, when the two bits are "00", it may indicate not to report the
aperiodic CSI, but to transmit uplink data on the PUSCH only; when the two bits are
"01/10", it may indicate to report the aperiodic CSI, and the number of the downlink
CCs contained in the downlink CC set is 1; and when the two bits are "11", it may
indicate to report the aperiodic CSI, and the number of the downlink CCs contained in
the downlink CC set is more than 1, such as two CCs, it may also indicate the index of
each CC. Such corresponding relationship may be configured at the base station side
via high layer signaling and stored for use by the base station in generating the DCI.
The above manner of indication is merely an embodiment of the present invention,
and the above indication information may also be configured as the cases may be.
In this embodiment, when the aperiodic CSI is contained in the UCI and be
transmitted to the base station via the PUSCH, the transmission of the UCI containing
the aperiodic CSI via the PUSCH may be classified into: 1) the UCI is separately

transmitted on the PUSCH (CQI-only PUSCH), i.e. the uplink data is not transmitted
when the aperiodic CSI is transmitted; and 2) the aperiodic CSI is transmitted together
with the uplink data on the PUSCH, i.e. the uplink data is also transmitted when the
aperiodic CSI is transmitted. Wherein, which manner is used for transmitting the UCI
may be judged according to the indication information, the modulation and coding
scheme, and used resources, which shall be described in detail in embodiment 5.
In this embodiment, the base station needs to configure multiple groups of
relevant downlink CC sets in advance for UE, correspondingly store the sets, together
with the indication information, such as the 2 bits information in DCI format 0/4, and
also store the corresponding relationship at the UE side, for the UE to judge whether
to transmit aperiodic CSI and in transmitting the aperiodic CSI, to determine the
number and indices of the relevant downlink CCs.
Thus, in this embodiment, before the base station generates DCI for the UE being
required to report the aperiodic CSI, the method further comprises:
configuring, by the base station, the UE with a plurality groups of relevant
downlink CC sets; storing correspondingly the indication information and the
plurality groups of relevant downlink component carrier sets; and
selecting, by the base station, corresponding indication information according to
the indices and the number of the relevant downlink CCs when generating the DCI.
For example, the following description is provided taking that the aperiodic CSI
is contained in the UCI for transmission as an example. Table 6 and Table 7
respectively shows the corresponding relationship between the indication information
configured by the base station of the embodiments of the present invention and a
plurality groups of relevant downlink CC sets. However, Table 6 and Table 7 are
merely embodiments of the present invention, the present invention is not limited
thereto, and the base station may configure as the cases may be.



It can be seen from above that if the base station is configured with the
corresponding relationship as shown in Table 7, the corresponding relationship is also
stored at the UE side. For example, if the base station learns that it is necessary for the
UE to report the CSI of all the downlink CCs configured by the system and the CSI
are contained in the UCI for transmission, the base station may learn through Table 7
that the corresponding indication information is "11", and uses the "CQI request" in
the DCI to carry the indication information "11". Thus, when the UE receives the DCI,

it may read indication information "11" from the DCI, and learns, by looking up Table
7, that the report contains the UCI of the aperiodic CSI of all the downlink CCs
configured by the system.
In the embodiments of the present invention, in the relevant downlink CC set,
when the number of the relevant downlink CCs is 1, the relevant downlink CC may be
the pairing downlink CC configured by the uplink CC of the PUSCH carrying the
UCI via a system information block (SIB-2), as the cases to which the indication
information "01" in Table 6 and Table 7 corresponds; in addition, the relevant
downlink CC may not be the downlink CC, linked via an SIB-2, to which the uplink
CC of the PUSCH carrying the aperiodic CSI corresponds, as the case to which "10"
in Table 6 corresponds.
For example, an uplink component earner (UL CC) is configured with UL CC #1
and UL CC #2, and a downlink CC is configured with DL CC #1, DL CC #2 and DL
CC #3; wherein the relationship between UL CC #1 and DL CC #1 is linked by an
SIB-2, and the relationship between UL CC #2 and DL CC #3 is linked by an SIB-2,
but DL CC #2 has no UL CC linked by the SIB-2. The UCI of DL CC #2 may be
transmitted via UL CC #1 or UL CC #2. For example, if DCI format 0 is used to
schedule the PUSCH on UL CC #1, when the indication information in DCI format 0
is "10", it indicates that the aperiodic CSI of DL CC #2 will be transmitted on the
PUSCH at ULCC#1.
In this embodiment, in the relevant downlink CC set, when the number of the
relevant downlink CCs is more than 1, the relevant downlink CC may be more than
one configured or activated downlink CCs, as the case to which "11" in Table 7
corresponds, and may be other downlink CCs, as the cases to which "11" in Table 6
and "10" in Table 7 correspond.
It can be seen from the above embodiment that the base station may allocate
resources according to the number of relevant downlink CCs to which the aperiodic
CSI needing to be reported by the UE corresponds, such that the manner of resource
allocation is flexible, and supports the transmission of UCI containing aperiodic CSI
in case of multiple carriers, thereby overcoming the defect existed in the prior art. And

when the UE transmits the UCI containing the aperiodic CSI by using the resources
allocated by the base station according to the number of the downlink CCs, the
accuracy of receiving information by the base station may be ensured, and the
limitation of the scheduling of the data transmission may be reduced.
The embodiments of the present invention provide also a base station as
described below in embodiment 4. Since the principle of the base station for solving
the problems is similar to that of the method for UCI transmission based on a base
station in embodiment 3, the embodiments of the method may be referred to in the
embodiments of the base station, and the similar parts shall not be described any
further.
Fig. 5 is a schematic diagram of the structure of the base station of embodiment 4
of the present invention. As shown in Fig. 5, the base station comprises an
information generating unit 501 and a first information transmitting unit 502, wherein
the information generating unit 501 is used for generating DCI, the DCI
comprising indication information which indicates UE whether to report aperiodic
CSI of relevant downlink CCs and indicates the indices and number of the relevant
downlink CCs when reporting the aperiodic CSI of the relevant downlink CCs, an
index of modulation and coding scheme, and used resources; wherein the used
resources are resources allocated to the UE by the base station according to the
number of the relevant downlink CCs; and
the first information transmitting unit 502 is used for transmitting the DCI to the
UE, so that the UE transmits the aperiodic CSI according to the indication information,
the index of modulation and coding scheme, and the used resources contained in the
DCI.
In this embodiment, when the information generating unit 501 determines that it
is necessary for the UE to report the aperiodic CSI of the relevant downlink CCs, it
may generate the DCI according to the transmission mode and demand of the system,
so as to instruct the UE to report the aperiodic CSI; wherein in the generated DCI, the
used resources are those allocated to the UE by the base station according to the
number of relevant downlink CCs.

In this embodiment, the DCI may be transmitted in a PUSCH. Wherein, the
indication information may be carried by using the "CQI request" with 2 bits in DCI
format 0 or 4. Details are as described in embodiment 3, which shall not be described
any further.
In this embodiment, the base station further comprises a resource allocating unit
503 for allocating corresponding resources to the UE according to the number of the
relevant downlink CCs. In particular, the resource allocating unit 503 may comprise a
first resource allocating unit and a second resource allocating unit (not shown and
similar to 301 and 302 in Fig. 3, respectively); wherein the first resource allocating
unit is used for allocating maximum resources of a predefined first number LI to the
UE when it is necessary for the UE to report the aperiodic CSI of one downlink CC;
and the second resource allocating unit is used for allocating maximum resources of a
predefined second number L2 to the UE when it is necessary for the UE to report the
aperiodic CSI of more than one downlink CCs; wherein the second number L2 is
greater than the first number LI, and the first number LI and the second number L2
are determined based on a CCR. The specific embodiment of determining LI and L2
is as described in embodiment 1, which shall not be described any further.
Furthermore, as shown in Fig. 5, the base station may comprise a configuring unit
505 and a storing unit 506; wherein the configuring unit 505 is used for configuring
the UE with a set of a plurality of relevant downlink CCs; wherein the base station
may perform configuration via high layer signalling, such as RRC; and the storing
unit 506 is used for correspondingly storing the indication information and a plurality
of groups of sets of relevant downlink CCs, as shown in Table 6 and Table 7.
Thus, when the information generating unit 501 generates the downlink DCI, it
selects corresponding indication information according to the indices and number of
the relevant downlink CCs.
It can be seen from the above embodiment that when the information generating
unit 501 determines it is necessary for the UE to report the aperiodic CSI of the
relevant downlink CCs, it may select corresponding indication information,
modulation and coding scheme and used resources to generate DCI in accordance

with actual situation, and then transmits above information to the UE. Since the base
station may allocate resources in accordance with the number of the downlink CCs,
the manner of resource allocation becomes flexible, and the transmission of UCI in
case of multiple carriers is supported.
Fig. 6 is a flowchart of the method for UCI transmission of embodiment 5 of the
present invention. As shown in Fig. 6, the method comprises:
step 601: receiving, by UE, DCI transmitted by a base station, the DCI
comprising indication information which indicates the UE whether to report aperiodic
CSI of relevant downlink CCs and indicates the indices and number of the relevant
downlink CCs when reporting the aperiodic CSI of the relevant downlink CCs, the
index of modulation and coding scheme, and used resources; wherein the used
resources are resources allocated to the UE by the base station according to the
number of the relevant downlink CCs;
wherein, the base station may transmits the DCI via a PCCCH, and the UE may
read the indication information, index of modulation and coding scheme (MCS) and
the used resource blocks from the DCI;
step 602: transmitting by the UE the aperiodic CSI according to the indication
information, the index of modulation and coding scheme and the used resources
contained in the DCI.
Wherein, the UE reports the aperiodic CSI via the UCI, and the UCI is
transmitted to the base station via a PUSCH. The transmission of the UCI via the
PUSCH may be classified into: 1) the UCI is separately transmitted via the PUSCH
(CQI-only PUSCH), i.e. the uplink data is not transmitted when the aperiodic CSI is
transmitted; and 2) the aperiodic CSI is transmitted together with the uplink data via
the PUSCH, i.e. the uplink data is also transmitted when the aperiodic CSI is
transmitted. Wherein, which manner is used for transmitting the UCI may be judged
according to a particular combination of the indication information, the modulation
and coding scheme, and the number of used resources. Following is the detailed
description.
Following description is provided taking that the CSI is contained in the UCI and

be transmitted to the base station via a PUSCH as an example. In addition,
ACK/NACK information may also be transmitted together with the aperiodic CSI to
the base station via the UCI. Whether the ACK/NACK information is transmitted
together with the aperiodic CSI is similar to the prior art, which shall not described
any further.
Fig. 7 is a flowchart of implementation of step 602 of embodiment 5 of the
present invention. As shown in Fig. 7, the following manner may be used for the UE
to transmit the aperiodic CSI in accordance with the indication information, the index
of modulation and coding scheme, and the used resources contained in the DCI:
step 701: judging, by the UE, whether it is necessary to report aperiodic CSI of
relevant downlink CCs according to the indication information in received DCI;
executing step 702 if the result of judgement is positive; and executing step 705 if the
result of judgement is negative;
wherein, the indication information may be carried using the "CQI request" with
2 bits in DCI format 0 or DCI format 4;
the UE may determine whether to report the aperiodic CSI of the relevant
downlink CCs in accordance with the indication information and prestored
corresponding relationship between the indication information and the downlink CC
sets;
for example, according to the corresponding relationship in Table 6 or Table 7, if
the 2 bits information is "00", the UE may determine that it is not necessary to report
the aperiodic CSI; and if in the DCI, the 2 bits information is "11/01/10", the UE may
determine that it is necessary to report the aperiodic CSI, and may learn the number
and indices of the relevant downlink CCs from Table 6 or Table 7;
step 702: determining by the UE the indices and number of the relevant downlink
CCs according to the indication information and prestored corresponding relationship
between the indication information and the downlink CC sets if the result of
judgement in step 701 is that it is necessary to report the aperiodic CSI;
for example, it may be determined in accordance with the corresponding
relationship in Table 6 or Table 7. For example, if it determines that the indication

information is "01", it may be learnt that the UCI containing the aperiodic CSI of 1
downlink CC is transmitted, and the index of the downlink CC is 1;
step 703: judging, according to the determined number of the relevant downlink
CCs and the corresponding index of modulation and coding scheme and used
resources, whether to only transmit the UCI containing the aperiodic CSI; and
executing step 704 if the result of judgement is that the UCI is only transmitted,
otherwise, executing step 706;
wherein, the particular process of judgement will be described in detail below
with reference to Fig. 8;
step 704: transmitting at a predefined time, by the UE, the UCI containing the
aperiodic CSI via a PUSCH on the resources which are allocated to the UE by the
base station, and not transmitting the uplink data at the same time, if the result of
judgement in step 703 is positive;
wherein, the UE transmits the UCI containing the aperiodic CSI on the used
resources allocated by the base station to the UE, and ACK/NACK information may
be contained in the UCI for transmission together with the aperiodic CSI;
step 705: transmitting only the uplink data by the UE on the PUSCH, if the result
of judgement in step 701 is negative;
step 706: transmitting, by the UE, the UCI containing the aperiodic CSI on the
resources which are allocated to the UE by the base station, if the result of judgement
in step 703 is negative;
wherein, when the UCI containing the aperiodic CSI and the uplink data are
transmitted, the UCI containing the aperiodic CSI may be multiplexed with the uplink
data and be transmitted together to the base station on the PUSCH; that is, part of the
resources of the uplink data are used when the UCI containing the aperiodic CSI is
trasmitted, and extra signalling which used to indicate this part of the resources is not
necessary, this part of the resources may be agreed in advance to be used in such a
case between the UE and the base station.
Fig. 8 is a flowchart of implementation of step 703 of embodiment 5 of the
present invention. As shown in Fig. 8, it comprises the steps as follows:

step 801: judging whether the number of the relevant downlink CCs is one or
more than one; executing step 802 if the result of judgement is that the number is 1,
and executing step 805 if the result of judgement is that the number is more than 1;
step 802: judging further whether the index of modulation and coding scheme is a
first predefined value and whether the number of the used resources is less than or
equal to a first number when the relevant downlink CCs is one; executing step 803 if
the result of judgement is positive, otherwise, executing step 804;
in this embodiment, judging whether the index of modulation and coding scheme
is 29, and whether the number of the used resources is not more than 4;
step 803: determining that the UCI containing the aperiodic CSI is only
transmitted and the uplink data is not transmitted, if the result of judgement in step
802 is positive;
step 804: determining that the UCI containing the aperiodic CSI and the uplink
data are transmitted, if the result of judgement in step 802 is negative;
step 805: judging further whether the index of the modulation and coding scheme
is a second predefined value and whether the number of the used resources is less than
or equal to a second number; executing step 806 if the result of judgement is positive,
otherwise, executing step 805;
in this embodiment, judging whether the index of modulation and coding scheme
is 29, and whether the number of the used resources is not more than L; wherein the
second number L is greater than the first number and preferably 5 or 6;
step 806: determining that the UCI containing the aperiodic CSI is only
transmitted and the uplink data is not transmitted, if the result of judgement in step
805 is positive; and
step 807: determining that the UCI containing the aperiodic CSI and the uplink
data are transmitted, if the result of judgement in step 805 is negative.
It can be seen from the above embodiment that the UE may determine the number
of the relevant downlink CCs according to the received indication information,
thereby determining the transmission of the aperiodic CSI according to the number of
the relevant downlink CCs, the modulation and coding scheme and the used resources,

and the aperiodic CSI may be contained in the UCI for transmission; such a method is
applicable to the transmission of UCI in case of multiple carriers, thereby overcoming
the defect existed in the prior art.
The embodiments of the present invention also provide UE as described below in
embodiment 6. Since the principle for the UE to solve the problems is similar to that
of the method for UCI transmission based on a base station as described above, the
embodiments of the method may be referred to in the embodiments of the UE, and the
similar parts shall not be described any further.
Fig. 9 is a schematic diagram of the structure of the UE of embodiment 6 of the
present invention. As shown in Fig. 9, the UE comprises an information receiving unit
901 and a second information transmitting unit 902; wherein
the information receiving unit 901 is used for receiving DCI transmitted by a base
station, the DCI comprising indication information which indicates the UE whether to
report aperiodic CSI of relevant downlink CCs and indicates the index and number of
the relevant downlink CCs when reporting the aperiodic CSI of the relevant downlink
CCs, an index of modulation and coding scheme, and used resources; wherein the
used resources are resources allocated to the UE by the base station according to the
number of the relevant downlink CCs; and
the second information transmitting unit 902 is used for transmitting the aperiodic
CSI according to the indication information, the index of modulation and coding
scheme and the used resources contained in the downlink control information. Fig. 10
is a schematic diagram of the structure of the second information transmitting unit of
Fig. 9. As shown in Fig. 10, the second information transmitting unit 902 comprises:
a first judging unit 1001 forjudging whether it is necessary to report aperiodic
CSI of relevant downlink CCs according to indication information;
a carrier determining unit 1002 for determining the indices and number of the
relevant downlink CCs according to the indication information and prestored
corresponding relationship between the indication information and downlink CC sets,
if the result of judgement of the first judging unit 1001 is that it is necessary to report
aperiodic CSI of relevant downlink CCs;

a second judging unit 1003 for judging whether only the aperiodic CSI is
transmitted according to the number of the relevant downlink CCs determined by the
carrier determining unit 1002, a corresponding index of modulation and coding
scheme and the used resources;
a third information transmitting unit 1004 for transmitting the aperiodic CSI on
the resources allocated by the base station to the UE, if the result of judgement of the
second judging unit 1003 is that the uplink data is not transmitted when the aperiodic
CSI is transmitted; and
a fourth information transmitting unit 1005 for transmitting the aperiodic CSI and
the uplink data on the resources allocated by the base station to the UE, if the result of
judgement of the second judging unit 1003 is that not only the aperiodic CSI but also
the uplink data are transmitted.
Furthermore, the UE may comprise a storing unit (not shown) for storing the
corresponding relationship between the indication information and the downlink CC
sets, for use by the UE.
Fig. 11 is a schematic diagram of the structure of the second judging unit of Fig.
10. As shown in Fig. 11, the second judging unit 1003 comprises:
a third judging unit 1101 for judging whether the number of the relevant
downlink CCs is one or more;
a fourth judging unit 1102 for further judging whether the index of the
modulation and coding scheme contained in the DCI is a predefined index and
whether the number of the used resources is less than or equal to a first predefined
value, if the result of judgement of the third judging unit 1101 is that the number of
the relevant downlink CCs is one; or, for further judging whether the index of the
modulation and coding scheme contained in the DCI is a predefined index and
whether the number of the used resources is less than or equal to a second predefined
value, if the result of judgement of the third judging unit 1101 is that the number of
the relevant downlink CCs is more than one; wherein the second number is greater
than the first number, and the first number and the second number are determined
according to a CCR;

a first determining unit 1103 for determining that the uplink data is not
transmitted when the aperiodic CSI is transmitted, if the result of the fourth judging
unit 1102 is positive; and
a second determining unit 1104 for determining that the uplink data is also
transmitted when the aperiodic CSI is transmitted, if the result of the fourth judging
unit 1102 is negative.
Wherein the UE may report the aperiodic CSI via the UCI, and the UCI is
transmitted to the base station via the PUSCH. The manners of embodiment 5 shown
in Figs. 7 and 8 may be used for carrying out every functional units of the second
information transmitting unit 902, which shall not be described any further.
It can be seen from the above embodiment that the UE may determine the number
of the relevant downlink CCs according to the received indication information,
thereby determining the transmission of the aperiodic CSI according to the number of
the relevant downlink CCs, the modulation and coding scheme and the used resources;
such a method is applicable to the transmission of UCI in case of multiple carriers,
ensures the accuracy of receiving information by the base station, and reduces the
limitation of the scheduling of the data transmission.
The above embodiment is applicable to an LTE-A system, and a following
example will be described to explain the present embodiment in detail. In this
example, aperiodic CSI is reported via UCI and the index of the modulation and
coding scheme is 29; the number of the resources used when the number of the
downlink CCs is 1, i.e. the first number LI, is less than or equal to 4, and the number
of the resources used when the number of the downlink CCs is 2, i.e. the second
number L2, is less than or equal to 5.
Fig. 12 is a flowchart of the method for UCI transmission at a base station side of
embodiment 7 of the present invention. As shown in Fig. 12, the method comprises:
step 1201: configuring the UE by the base station with a plurality groups of
relevant downlink CC sets; and correspondingly storing the indication information
and the plurality groups of relevant downlink CC sets;
as shown in Table 6 or Table 7, this embodiment will be described taking Table 6

as an example;
step 1202: generating by the base station a corresponding DCI source bit
according to the transmission mode and the demand of the system, when the base
station determines that the UE should report the aperiodic CSI of the relevant
downlink CCs , such as the base station determines that the UE should report the
aperiodic CSI of downlink CCs with indices 1 and 2, with the process of generation
being similar to the prior art, which shall not be described any further;
wherein, the DCI may contain indication information "11", which may be carried
by using the "CQI request" in DCI format 0 or 4, with the index of the modulation
and coding scheme being 29, and the number of the resources L2 being 5;
step 1203: adding a cyclic redundancy check (CRC) code by the base station to
the generated DCI source bit;
step 1204: performing the processes of modulation, encoding and rate matching
to the DCI source bit added with CRC;
step 1205: forming a PDCCH, mapping to a corresponding physical
time-frequency resource, and transmitting to the UE via the PDCCH.
Fig. 13 is a flowchart of the method for UCI transmission at a UE side of
embodiment 7 of the present invention. First, the UE detects possible DCI in
accordance with the transmission mode, and then determines whether to transmit the
UCI containing the aperiodic CSI or whether to transmit only the UCI containing the
aperiodic CSI according to the detected DCI. As shown in Fig. 13, the method
comprises:
step 1301: receiving by the UE the PDCCH on the corresponding resource, and
receiving the DCI;
step 1302: performing the processes of de-rate matching, de-modulation and
de-coding to the DCI;
step 1303: judging whether the CRC is correct or not; and executing step 1304, if
the result of judgment is positive, otherwise, executing step 1308;
step 1304: further judging whether to transmit the UCI containing the aperiodic
CSI in accordance with the indication information in the DCI, the index of the

modulation and coding scheme and the used resources, if the result of judgment of
step 1303 is that the CRC is correct; and executing step 1305 if the result of judgment
is to transmit the UCI, otherwise, executing step 1310;
wherein, "11" indicates that the UCI containing the aperiodic CSI of the
downlink CCs with the indices 1 and 2 is transmitted;
step 1305: further determining the number of the downlink CCs, if the result of
judgment in step 1304 is positive;
it can be seen from above that the number of the downlink CCs is 2;
step 1306: further judging whether the index of the modulation and coding
scheme is 29 and whether the number of the used resources is less than or equal to 5
according to the number of the downlink CCs; and executing step 1306, if the result
of judgment is positive, otherwise, executing step 1311;
in this embodiment, if L2 is 5 and the index of the modulation and coding scheme
is 29, the result of judgment is positive;
step 1307: transmitting at a predefined time, by the UE, the UCI containing the
aperiodic CSI on the resources which are allocated to the UE by the base station, with
the UCI containing the aperiodic CSI being only transmitted, and the uplink data
being not transmitted, if the result of judgement in step 1305 is positive;
step 1308: if the result of step 1303 is that the CRC is wrong, then further
determining whether the CRC exceeds a maximum blind detection time, and
executing step 1309, if the result of determining is positive, otherwise, returning back
to step 1301;
step 1309: abandoning the PDCCH and terminating the process, if the result of
judgment in step 1308 is positive;
step 1310: transmitting the uplink data via the PUSCH only and then terminating
the process (not shown), if the result of judgment in step 1304 is negative; and
step 1311: transmitting the uplink data and the UCI containing the aperiodic CSI
on the PUSCH, if the result of judgment in step 1306 is negative;
wherein, the UCI containing the aperiodic CSI may be multiplexed with the
uplink data and be transmitted together to the base station on the PUSCH; that is, part

of the resources of the uplink data are used when the UCI containing the aperiodic
CSI is transmitted, and extra signalling which used to indicate this part of the
resources is not necessary, this part of the resources may be agreed in advance to be
used in such a case between the UE and the base station .
The above embodiment is described taking a plurality of downlink CCs as an
example. If the number of the downlink CCs is 1, in step 1306, the judgment
condition is whether the index of modulation and coding scheme is 29 and whether
the number of the resources, i.e. L1, is less than or equal to 4. Other processes are
similar to those shown in Fig. 13, and shall not be described any further.
The embodiments of the present invention further provide a computer-readable
program, wherein when the program is executed in a base station, the program
enables the computer to carry out the method for allocating resources as described in
embodiment 1 in the base station.
The embodiments of the present invention further provide a storage medium in
which a computer-readable program is stored, wherein the computer-readable
program enables the computer to carry out the method for allocating resources as
described in embodiment 1 in the base station.
The embodiments of the present invention further provide a computer-readable
program, wherein when the program is executed in a base station, the program
enables the computer to carry out the method for transmitting CSI as described in
embodiments 3 and 7 in the base station.
The embodiments of the present invention further provide a storage medium in
which a computer-readable program is stored, wherein the computer-readable
program enables the computer to carry out the method for transmitting CSI as
described in embodiment 3 and 7 in the base station.
The embodiments of the present invention further provide a computer-readable
program, wherein when the program is executed in UE, the program enables the
computer to carry out the method for transmitting CSI as described in embodiment 4
or 7 in the user equipment.
The embodiments of the present invention further provide a storage medium in

which a computer-readable program is stored, wherein the computer-readable
program enables the computer to carry out the transmission method for CSI as
described in embodiment 4 or 7 in UE.
It can be seen from the above embodiment that the base station may allocate
corresponding resources to the UE in accordance with the number of relevant
downlink CCs, so, resource allocation is flexible, and the transmission of UCI
containing aperiodic CSI in case of multiple carriers is supported, thereby ensuring
the accuracy of receiving information by the base station, and reducing the limitation
of the scheduling of the data transmission.
The aforementioned devices and methods of the present invention may be
implemented by hardware or by hardware in combination with software. The present
invention relates to such a computer-readable program that, when executed by a
logical component part, enables the logical component part to implement the
aforementioned devices or component parts, or enables the logical component part to
realize the aforementioned methods or steps. The present invention further relates to a
storage medium for storing the program, such as a hard disk, a magnetic disk, an
optical disk, a DVD, or a flash memory, and so on.
The present invention is described above with reference to particular
embodiments. However, it should be understood by those skilled in the art that such a
description is illustrative only, and not intended to limit the protection scope of the
present invention. Various variants and modifications may be made by those skilled in
the art according to the spirits and principle of the present invention, and such variants
and modifications fall within the scope of the present invention.

We Claim:
1. A method for resource allocation, comprising:
determining, by a base station, that a user equipment should report aperiodic
channel status information of relevant downlink component carriers; and
allocating, by the base station, corresponding resources to the user equipment
according to the number of the relevant downlink component carriers;
2. The method according to claim 1, wherein the step of allocating by the base
station corresponding resources to the user equipment according to the number of the
relevant downlink component carriers comprises:
the maximum number of the resources allocated by the base station to the user
equipment is a predefined first number if the base station determines that the user
equipment should report the aperiodic channel status information of one downlink
component carrier; and
the maximum number of the resources allocated by the base station to the user
equipment is a predefined second number if the base station determines that the user
equipment should report the aperiodic channel status information of more than one
downlink component carriers;
wherein the second number is greater than the first number, and the first number
and the second number are determined according to a channel coding rate.
3. The method according to claim 2, wherein the first number is 4; and
the second number is 5 or 6 when the number of relevant downlink component
carriers is 2.
4. A base station, comprising:
a first determining unit for determining that a user equipment should report
aperiodic channel status information of relevant downlink component carriers; and
a resource allocating unit for allocating corresponding resources to the user
equipment according to the number of the relevant downlink component carriers;
5. The base station according to claim 4, wherein the resource allocating unit
comprises:
a first resource allocating unit for allocating maximum resources of a predefined

first number to the user equipment if the first determining unit determines thatthe user
equipment should report the aperiodic channel status information of one downlink
component carrier; and
a second resource allocating unit for allocating maximum resources of a
predefined second number to the user equipment if the first determining unit
determines that the user equipment should report the aperiodic channel status
information of more than one downlink component carriers;
wherein the second number is greater than the first number, and the first number
and the second number are determined according to a channel coding rate.
6. A transmission method for channel status information, comprising:
generating by a base station downlink control information, the downlink control
information comprising indication information which indicates a user equipment
whether to report aperiodic channel status information of relevant downlink
component carriers and indicates the index and number of the relevant downlink
component carriers when reporting the aperiodic channel status information of the
relevant downlink component carriers, the index of coding and modulation scheme,
and used resources; wherein the used resources are resources allocated to the user
equipment by the base station according to the number of the relevant downlink
component carriers;and
transmitting the downlink control information to the user equipment by the base
station, so that the user equipment transmits the aperiodic channel status information
according to the indication information, the index of coding and modulation scheme
and the used resources.
7. The method according to claim 6, wherein the step of allocating resources to
the user equipment by the base according to the number of the relevant downlink
component carriers comprises:
the maximum number of the resources allocated by the base station to the user
equipment is a predefined first number if the base station determines that it is
necessary for the user equipment to report the aperiodic channel status information of
one downlink component carrier; and

the maximum number of the resources allocated by the base station to the user
equipment is a predefined second number if the base station determines that it is
necessary for the user equipment to report the aperiodic channel status information of
more than one downlink component carriers;
wherein the second number is greater than the first number, and the first number
and the second number are determined according to a channel coding rate.
8. The method according to claim 7, wherein the first number is 4; and
the second number is 5 or 6 when the number of relevant downlink component
carriers is 2.
9. The method according to claim 6, wherein the method further comprises:
configuring, by the base station, the user equipment with a plurality groups of
relevant downlink component carrier sets;
storing correspondingly the indication information and the plurality groups of
relevant downlink component carrier sets; and
selecting, by the base station, corresponding indication information according to
the index and the number of the relevant downlink component carriers when
generating the downlink control information.
10. A transmission method for channel status information, comprising:
receiving, by user equipment, downlink control information transmitted by a base
station, the downlink control information comprising indication information which
indicates the user equipment whether to report aperiodic channel status information of
relevant downlink component carriers and indicates the index and number of the
relevant downlink component carriers when reporting the aperiodic channel status
information of the relevant downlink component carriers, the index of coding and
modulation scheme, and used resources; wherein the used resources are resources
allocated to the user equipment by the base station according to the number of the
relevant downlink component carriers; and
transmitting by the user equipment the aperiodic channel status information
according to the indication information, the index of coding and modulation scheme
and the used resources contained in the downlink control information.

11. The method according to claim 10, wherein the step of transmitting by the
user equipment the aperiodic channel status information according to the indication
information, the index of coding and modulation scheme, and the used resources
contained in the downlink control information comprises:
judging, by the user equipment, whether it is necessary to report aperiodic
channel status information of relevant downlink component carriers based on the
indication information;
determining, by the user equipment, the index and the number of the relevant
downlink component carriers, according to the indication information and prestored
corresponding relationship between the indication information and the downlink
component carrier sets, if the result of judgement is that the aperiodic channel status
information is needed to be reported;
judging, according to the determined number of the relevant downlink component
carriers and the corresponding index of coding and modulation scheme and used
resources, whether to transmit uplink data when the aperiodic channel status
information is transmitted;
transmitting, by the user equipment, the aperiodic channel status information on
the used resources which are allocated to the user equipment by the base station, if the
result of judgement is not to transmit the uplink data when the aperiodic channel
status information is transmitted; and
transmitting, by the user equipment, the aperiodic channel status information and
uplink data on the resources which are allocated to the user equipment by the base
station, if the result of judgement is to transmit the uplink data also when the
aperiodic channel status information is transmitted.
12. The method according to claim 11, wherein the step of judging according to
the determined number of the relevant downlink component carriers and the
corresponding index of coding and modulation scheme and used resources whether to
transmit uplink data when the aperiodic channel status information is transmitted
comprises:
judging whether the number of the relevant downlink component carriers is one

or more than one;
judging further by the user equipment whether the index of coding and
modulation scheme contained in the downlink control information is a predefined
index and whether the number of the used resources is less than or equal to a
predefined first number, if the result of judgement is that the number of the relevant
downlink component carriers is one; wherein the first number is determined according
to a channel coding rate;
determining not to transmit the uplink data when the aperiodic channel status
information is transmitted if the result of judgement is positive; and
determining to transmit the uplink data also when the aperiodic channel status
information is transmitted if the result of judgement is negative.
13. The method according to claim 12, wherein if the result of judgement is that
the number of the relevant downlink component carriers is more than one, the method
further comprises:
judging further by the user equipment whether the index of coding and
modulation scheme contained in the downlink control information is a predefined
index and whether the number of the used resources is less than or equal to a
predefined second number; wherein the second number is greater than the first
number, and the second number is determined according to a channel coding rate;
determining not to transmit the uplink data when the aperiodic channel status
information is transmitted if the result of judgement is positive; and
determining to transmit the uplink data also when the aperiodic channel status
information is transmitted if the result of judgement is negative.
14. Abase station, comprising:
an information generating unit for generating downlink control information, the
downlink control information comprising indication information which indicates user
equipment whether to report aperiodic channel status information of relevant
downlink component carriers and indicates the index and number of the relevant
downlink component carriers when reporting the aperiodic channel status information
of the relevant downlink component carriers, an index of coding and modulation

scheme, and used resources; wherein the used resources are resources allocated to the
user equipment by the base station according to the number of the relevant downlink
component carriers; and
a first information transmitting unit for transmitting the downlink control
information to the user equipment, so that the user equipment transmits the aperiodic
channel status information according to the indication information, the index of
coding and modulation scheme, and the used resources contained in the downlink
control information.
15. A user equipment, comprising:
an information receiving unit for receiving downlink control information
transmitted by a base station, the downlink control information comprising indication
information which indicates the user equipment whether to report aperiodic channel
status information of relevant downlink component carriers and indicates the index
and number of the relevant downlink component carriers when reporting the aperiodic
channel status information of the relevant downlink component carriers, an index of
coding and modulation scheme, and used resources; wherein the used resources are
resources allocated to the user equipment by the base station according to the number
of the relevant downlink component carriers; and
a second information transmitting unit for transmitting the aperiodic channel
status information according to the indication information, the index of coding and
modulation scheme and the used resources contained in the downlink control
information.
16. A computer-readable program, wherein when the program is executed in a
base station, the program enables the computer to carry out the method for allocating
resources as claimed in any one of claims 1-3 in the base station.
17. A storage medium in which a computer-readable program is stored, wherein
the computer-readable program enables the computer to carry out the method for
allocating resources as claimed in any one of claims 1-3 in a base station.
18. A computer-readable program, wherein when the program is executed in a
base station, the program enables the computer to carry out the transmission method

for channel status information as claimed in any one of claims 7-9 in the base station.
19. A storage medium in which a computer-readable program is stored, wherein
the computer-readable program enables the computer to carry out the transmission
method for channel status information as claimed in any one of claims 7-9 in a base
station.
20. A computer-readable program, wherein when the program is executed in user
equipment, the program enables the computer to carry out the transmission method
for channel status information as claimed in any one of claims 10-13 in the user
equipment.
21. A storage medium in which a computer-readable program is stored, wherein
the computer-readable program enables the computer to carry out the transmission
method for channel status information as claimed in any one of claims 10-13 in user
equipment.