WO2016163855A1

WO2016163855A1 - Method for multiplexing uplink information

Info

Publication number: WO2016163855A1
Application number: PCT/KR2016/003799
Authority: WO
Inventors: Yingyang Li; Chengjun Sun
Original assignee: Samsung Electronics Co., Ltd.
Priority date: 2015-04-09
Filing date: 2016-04-11
Publication date: 2016-10-13

Abstract

The present disclosure provides a method for multiplexing uplink control information (UCI) in an uplink channel. Firstly, a user equipment (UE) divides UCI into different categories, and performs encoding, rate matching and modulation on UCI in a different category. And then, the UE respectively maps UCI of a different category to the uplink channel. The present disclosure also provides a method and device for multiplexing periodic channel state information (P-CSI) and aperiodic channel state information (A-CSI) in an uplink channel, a method and device for determining modulation symbol number occupied by UCI, and a method and device for determining uplink physical resource block (PRB) used for uplink transmission. The present disclosure provides a general physical resource mapping method to process various kinds of uplink information, so as to guarantee reliability requirements of different UCI. P-CSI fed back with A-CSI may be optimized, so as to reduce feedback overhead. Uplink channel resources allocated by a base station may be fully utilized, and uplink resource utilization may also be improved.

Description

METHOD FOR MULTIPLEXING UPLINK INFORMATION

The present disclosure relates to wireless communication system, and more particularly, to a method for multiplexing various kinds of uplink information in an uplink channel of a long term evolution (LTE) carrier aggregation (CA) system.

In a LTE system, transmit downlink data based on hybrid Automatic Repeat request (HARQ) technologies. Correspondingly, after receiving data from a base station, a user equipment (UE) needs to feed back HARQ-Acknowledge (HARQ-ACK) information. That is, the UE feeds back an ACK to indicate that a transport block (TB) has been successfully received. When a negative acknowledge (NACK) has been fed back, it indicates that a TB reception is failed. The HARQ-ACK information of a UE may be a discontinuous transmission (DTX), which indicates that the UE does not receive a downlink (DL) grant from a base station. In other words, the base station does not schedule the UE’s resources actually. Alternatively, the base station has scheduled the UE’s resources. However, the UE does not receive the DL grant from the base station. To reduce feedback overhead, NACK and DTX may be not differentiated generally when feeding back the HARQ-ACK information by a UE. Subsequently, one bit may be used to indicate reception state of a TB. For a cell of a frequency division duplex (FDD) system, HARQ-ACK information of data within one downlink subframe needs to be fed back in one uplink subframe. For a cell of a time division duplex (TDD) system, when data of downlink subframes is more than that of uplink subframes in a frame structure, HARQ-ACK information of data within multiple downlink subframes needs to be fed back in one uplink subframe generally. The foregoing multiple downlink subframes are referred to as a binding window of this uplink subframe. For example, size of a binding window in a LTE TDD cell may be 1, 2, 3, 4, or 9.

In a LTE-advanced system, a greater working bandwidth may be obtained by combining multiple component carriers (CCs), meanwhile uplink links and downlink links of a communication system may be formed, which is the CA technologies. Subsequently, higher transmission speed may be supported. Until now, various kinds of CAs are supported. That is, each aggregated cell may be a FDD cell. Alternatively, each aggregated cell may be a TDD cell with the same TDD uplink and downlink configurations. Still alternatively, each aggregated cell may be a TDD cell with a different TDD uplink and downlink configuration. In addition, aggregation of a FDD cell and a TDD cell may also be supported. Meanwhile, uplink and downlink configurations of the aggregated TDD cell may be semi-static configured or dynamically changed.

For a UE configured with CA mode, one cell is referred to as a primary cell (Pcell), while the other cells are referred to as second cells (Scells). Based on a method of LTE, downlink data of Pcell and Scell is transmitted according to HARQ mechanism. Correspondingly, a UE needs to feed back HARQ-ACK information of multiple cells. That is, compared with a single cell, multiply increase HARQ-ACK information amount needing to be fed back. Based on the method of LTE, the HARQ-ACK information about all the configured cells is fed back in a physical uplink control channel (PUCCH) channel of the Pcell. Based on the method of LTE, for a configured cell, determine HARQ-ACK bit number needing to be fed back, based on size of binding window and configured transmission mode. And obtain the total bit number of the HARQ-ACK needing to be fed back, based on the HARQ-ACK bit number of each configured cell. The reason for adopting such method is as follows. A cell configured with radio resource control (RRC) signaling is relatively reliable for a base station and a UE.

Based on the method of LTE, PUCCH format 3 is supported at present. Basic idea of the PUCCH format 3 is to jointly encode multiple HARQ-ACK bits, e.g., HARQ-ACK bits coming from multiple configured cells, and map to a physical channel to be transmitted. PUCCH format 3 may support to transport 22 bits at most. Based on the method of LTE, when needing to feed back uplink control information (UCI) in a physical uplink shared channel (PUSCH) channel, adopt a different processing method for a different UCI type. As shown in FIG.1, FIG.1 is a schematic diagram illustrating how to multiplex HARQ-ACK, rank indication (RI), and channel quality indicator (CQI)/precoding matrix indicator (PMI). After performing the encoding and rate matching on the CQI/PMI information, a time preferred method is used to perform the mapping, which is the same as the method for mapping uplink data. The HARQ-ACK information is mapped to 4 symbols adjacent to demodulation reference signal (DMRS) to be transmitted. Meanwhile a frequency direction opposite to that of CQI/PMI is used to perform the mapping. Thus, when HARQ-ACK information needs to occupy a large number of resource elements (REs), the HARQ-ACK information may cover the RE occupied by the CQI/PMI, so as to protect the HARQ-ACK information with higher importance. Similar to the HARQ-ACK information, RI information is mapped to a symbol adjacent to the HARQ-ACK information, which is also mapped by using a frequency direction opposite to that of the CQI/PMI. Thus, when the RI information needs to occupy a large number of REs, the RI information may cover the RE occupied by the CQI/PMI, so as to protect the RI information with higher importance.

At present, third generation partnership project (3GPP) is performing standardization work on enhanced CA technologies, which may aggregate more cells, e.g., aggregated cell number may reach 32. At this time, for a UE, divide all the configured cells into multiple groups. Alternatively, there is only one group. For each group, respectively feed back HARQ-ACK information in a PUCCH of a cell. Such cell feeding back the HARQ-ACK information is similar to the Pcell in current CA technologies. Here, cell number of each group may still exceed the maximum aggregated cell number supported by current CA technologies. Since number of cells needing to feed back the HARQ-ACK information in a PUCCH of a cell is increased, when downlink data transmission performance is not much affected, the total bit number of HARQ-ACK needing to be fed back in the PUCCH is necessarily added, e.g., greater than 22 bits. Actually, the UCI information transmitted by a UE in an uplink direction may also include a scheduling request (SR) and channel state information (CSI). And the CSI may be further divided into periodic CSI (P-CSI) and aperiodic CSI (A-CSI). Correspondingly, to support transmission of UCI exceeding 22 bits, a new PUCCH format is necessary to be defined. This format may be entirely new, or may be obtained based on current PUCCH format 3, PUSCH or other channel structures, which may be referred to as PUCCH format X in the following. Subsequently, PUCCH format X has been introduced, which should also bring a series of effects. Correspondingly, it is necessary to design a specific method for transmitting the UCI.

The present disclosure aims to provide a method and device for multiplexing various kinds of uplink information in an uplink channel, so as to guarantee transmission reliability, and improve uplink resource utilization.

The present disclosure provides a method for multiplexing uplink control information (UCI) in an uplink channel, including:

dividing, by a user equipment (UE), the UCI into different categories, and respectively performing encoding, rate matching and modulation on the UCI of a different category;

respectively mapping, by the UE, the UCI of a different category to the uplink channel.

Preferably, performing by the UE the encoding on the UCI of a different category includes:

taking hybrid Automatic Repeat request-Acknowledge (HARQ-ACK), scheduling request (SR) and first type channel state information (CSI) as first type UCI;

jointly encoding the first type UCI;

taking second type CSI as second type UCI;

jointly encoding the second type UCI;

wherein reliability requirements of the first type CSI are higher than that of the second type CSI, reliability requirements of the first type UCI are higher than that of the second type UCI.

Preferably, respectively mapping by the UE the UCI of a different category to the uplink channel includes:

mapping the first type UCI to a first resource element (RE);

mapping the second type UCI to a second RE, wherein the first RE and the second RE do not conflict; or, the first RE overlaps the second RE.

Preferably, when a UE needs to feed back periodic channel state information (P-CSI) of N cells within one subframe, wherein respectively performing by the UE the encoding on the UCI of a different category includes:

taking the P-CSI of the N cells in a rank indication (RI) category as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in a channel quality indicator (CQI)/precoding matrix indicator (PMI) category as the second type UCI, and jointly encoding the second type UCI;

when the UE needs to feed back the P-CSI and aperiodic channel state information (A-CSI) of N cells within one subframe, respectively performing by the UE the encoding on the UCI of a different category includes:

taking the P-CSI of the N cells in RI category, and/or, the A-CSI of each cell triggered currently in RI category as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in CQI/PMI category, and/or, the A-CSI of each cell triggered currently in CQI/PMI category as the second type UCI, and jointly encoding the second type UCI;

when the UE needs to feed back the HARQ-ACK and P-CSI of N cells within one subframe, respectively performing by the UE the encoding on the UCI of a different category includes:

taking the P-CSI of the N cells in RI category and the HARQ-ACK as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in CQI/PMI category as the second type UCI, and jointly encoding the second type UCI;

when the UE needs to feed back the HARQ-ACK, P-CSI and A-CSI of N cells within one subframe, respectively performing by the UE the encoding on the UCI of a different category includes:

taking the P-CSI of the N cells in RI category, the A-CSI of each cell triggered currently in RI category, and the HARQ-ACK as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in CQI/PMI category, the A-CSI of each cell triggered currently in CQI/PMI category as the second type UCI, and jointly encoding the second type UCI; wherein N is an integer.

when the uplink channel is a PUCCH format X channel, starting mapping the jointly encoded first type UCI from a known modulation symbol position, starting mapping the jointly encoded second type UCI after mapping position of the first type UCI, until all the modulation symbols of the PUCCH format X have been occupied;

when the uplink channel is a PUSCH, starting mapping the jointly encoded first type UCI from a known modulation symbol position, and starting mapping the jointly encoded second type UCI after the mapping position of the first type UCI, wherein the remaining REs are used for mapping the uplink data of the PUSCH.

The present disclosure also provides a device, which includes a classification processing module and a mapping module, wherein

the classification processing module is to divide UCI into different categories, and respectively perform encoding, rate matching and modulation on the UCI in a different category; and,

the mapping module is to map the UCI of a different category to an uplink channel.

The present disclosure also provides a method for multiplexing P-CSI and A-CSI in an uplink channel, including:

determining, by a UE, the P-CSI needing to be fed back with the A-CSI in current subframe;

performing, by the UE, encoding, rate matching and modulation on the A-CSI and P-CSI, and mapping to a physical uplink shared channel (PUSCH) to be transmitted.

Preferably, the P-CSI needing to be fed back with the A-CSI includes:

all the P-CSI configured for the current subframe; or, a subset of all the P-CSI mapped to the current subframe, which is determined based on a set criteria; or, first part P-CSI of multiple P-CSI needing to be fed back within the current subframe, or a subset of the first part P-CSI, wherein the first part P-CSI is determined by a method for feeding back the P-CSI in a PUCCH.

Preferably, the subset of all the P-CSI mapped to the current subframe includes at least one of:

the P-CSI of a primary cell (Pcell); or, the P-CSI of a cell configured with a PUCCH; or, the P-CSI in RI category; or, the P-CSI, priority level thereof is higher than a set threshold; or, the P-CSI with a different CSI process ID, a different cell ID and/or a different CSI subframe set index, compared with the A-CSI; or, the P-CSI determining to be fed back with the A-CSI, based on configuration of high level signaling.

Preferably, the method further includes:

determining to only feed back the A-CSI, or determining to simultaneously feed back the A-CSI and P-CSI, based on a different value of a CSI request field triggering the A-CSI.

Preferably, the P-CSI fed back with the A-CSI is allowed to be transmitted, based on a mechanism for transmitting the P-CSI in PUCCH, or a subset of the P-CSI which is allowed to be transmitted.

Preferably, wherein number of CSI processes of the P-CSI and A-CSI fed back within one subframe is less than or equal to N, N is the maximum number of CSI processes of the A-CSI fed back within one subframe, which is supported by the UE;

or, the number of CSI processes of the P-CSI and A-CSI fed back within one subframe is less than, or equal to M, wherein M is the maximum number of CSI processes simultaneously fed back by the UE within one subframe, which is configured with high level signaling, and M>N.

The present disclosure also provides a device, which includes a feedback information determining module and a feeding back module, wherein

the feedback information determining module is to determine P-CSI, which needs to be fed back with A-CSI in current subframe; and,

the feeding back module is to perform encoding, rate matching and modulation on the A-CSI and the P-CSI, and map to a PUSCH to be transmitted.

The present disclosure also provides a method for determining a modulation symbol number occupied by UCI, including:

encoding, by a UE, the UCI to be fed back in current subframe;

determining, by the UE, a parameter

corresponding to the UCI to be jointly encoded, and determining modulation symbol number allocated to each UCI type, wherein

is to calculate the modulation symbol number.

Preferably, performing by the UE the encoding on the UCI to be fed back in current subframe includes:

jointly encoding, by the UE, all the UCI to be fed back in current subframe;

wherein determining by the UE the parameter

corresponding to the UCI to be jointly encoded, in which

is to calculate the modulation symbol number, includes:

when all the UCI belongs to one UCI type, using

corresponding to the UCI type to calculate the modulation symbol number;

when the UCI to be fed back within current subframe comprises UCI of a different type, using the maximum value of

corresponding to the UCI of a different type to calculate the modulation symbol number.

Preferably, encoding by the UE the UCI to be fed back within the current subframe includes:

dividing all the UCI to be fed back within current subframe into different categories, respectively jointly encoding the UCI in a different category;

wherein determining by the UE the parameter

corresponding to the UCI to be jointly encoded, in which parameter

is to calculate the modulation symbol number, includes:

for CSI in CQI/PMI category, calculating the modulation symbol number based on

;

when there is no CSI in RI category, calculating the modulation symbol number for HARQ-ACK based on

;

when there is CSI in RI category, after jointly encoding the HARQ-ACK and RI, calculating the modulation symbol number based on

, or, calculating the modulation symbol number, based on one of

and

as well as a predefinition;

wherein parameters

,

and

are respectively used for calculating RE number occupied by HARQ-ACK, RI and CQI/PMI in PUSCH.

Preferably, determining by the UE the parameter

corresponding to the UCI to be jointly encoded, wherein the parameter

is used for calculating the modulation symbol number, includes:

for a PUCCH format X channel, re-using parameters

,

and

, which are used for determining RE number of the UCI in a PUSCH; or,

for the PUCCH format X channel, configuring new parameters

,

and

; or,

for the PUCCH format X channel, configuring parameter

, which is applied to the following cases, where only HARQ-ACK is transmitted, or only RI is transmitted, or the HARQ-ACK and RI are simultaneously transmitted.

Preferably, for different PUCCH channel formats of one UCI type, respectively configuring different parameter

to control RE number occupied by UCI transmission.

The present disclosure also provides a device, which includes an encoding module and a calculating module, wherein

the encoding module is to encode UCI to be fed back within current subframe; and,

the calculating module is to determine a parameter

corresponding to the UCI to be jointly encoded, wherein the parameter

is used for calculating modulation symbol number.

The present disclosure also provides a method for determining an uplink PRB used for an uplink transmission, including:

determining, by a UE, the uplink PRB occupied by an uplink channel, which is allocated within a current subframe;

mapping, by the UE, uplink information within the current subframe to a PUSCH to be transmitted, wherein the PUSCH corresponds to the uplink PRB.

Preferably, when the uplink information within the current subframe includes HARQ-ACK and P-CSI, in which the HARQ-ACK and the P-CSI are respectively allocated with PRB of a corresponding PUCCH format X, wherein mapping by the UE the uplink information within the current subframe to the PUSCH to be transmitted, in which the PUSCH corresponds to the uplink PRB, includes:

transmitting the HARQ-ACK and the P-CSI in one of the two PUCCH format X channels; or,

transmitting the HARQ-ACK and the P-CSI with the PRB of the two PUCCH format X channels.

Preferably, when the uplink information within the current subframe includes UCI and uplink data, a PRB channel of a corresponding PUCCH format X has been allocated for the UCI, the PRB of a corresponding PUSCH channel has been allocated for the uplink data, wherein mapping by the UE the uplink information within the current subframe to the PUSCH to be transmitted, in which the PUSCH corresponds to the uplink PRB, includes:

utilizing the PRB of one PUCCH format X channel and the PRB of the PUSCH to transmit the UCI and the uplink data; or,

simultaneously utilizing the PRB of two PUCCH format X channels and the PRB of the PUSCH to transmit the UCI and the uplink data.

Preferably, number of the uplink PRB used for transmitting the UCI and the uplink data is a power of 2, 3, and/or 5, cluster number of the uplink PRB is less than a set threshold.

The present disclosure also provides a method for determining an uplink transmission, includes:

determining, by a UE, uplink resources occupied by an uplink channel allocated within a current subframe; and

determining, by the UE, an uplink transmission power, based on a PRB number of the uplink resources and UCI needing to be fed back.

Preferably, the PRB number is allocated for a PUSCH; or,

the PRB number is a sum of the PRB number allocated for the PUSCH and a PRB number allocated for a PUCCH format X.

Preferably, when there is uplink data,

; or,

when A-CSI has been triggered without uplink data, processing the power control based on bit number of CQI/PMI for A-CSI, and

; or,

when A-CSI has been triggered without uplink data, processing the power control based on a total bit number of the UCI, wherein

corresponds to one UCI type.

Preferably, for uplink transmission mode 2, in a case where the A-CSI has been triggered without uplink data, processing the power control based on ≠0; for other cases, processing an uplink power control, based on a method employed when K_s=0.

The present disclosure also provides a device, which includes a resource determining module and a transmitting module, wherein

the resource determining module is to determine an uplink PRB occupied by an uplink channel, which is allocated within current subframe; and,

the transmitting module is to map uplink information within current subframe to a PUSCH to be transmitted, wherein the PUSCH corresponds to the uplink PRB.

Based on the foregoing technical solutions, it can be seen that the present disclosure provides a general physical resources mapping method to process various kinds of uplink information, so as to guarantee reliability requirements of different UCI information, optimize the P-CSI fed back together with the A-CSI. Subsequently, feedback overhead may be reduced, uplink channel resources allocated by the base station may be fully utilized, and uplink resource utilization may also be improved.

FIG.1 is a schematic diagram illustrating mapping from UCI to PUSCH in a LTE system.

FIG.2 is a flowchart illustrating a method for multiplexing UCI in an uplink channel, in accordance with an example of the present disclosure.

FIG.3 is a flowchart illustrating a method for multiplexing A-CSI and P-CSI in an uplink channel, in accordance with an example of the present disclosure.

FIG.4 is a flowchart illustrating a method for determining modulation symbol number occupied by the UCI, in accordance with an example of the present disclosure.

FIG.5 is a flowchart illustrating a method for determining physical resource block (PRB) resources used for uplink transmission, in accordance with an example of the present disclosure.

FIG.6 is a first mapping schematic diagram about the P-CSI, in accordance with an example of the present disclosure.

FIG.7 is a second mapping schematic diagram about the P-CSI, in accordance with an example of the present disclosure.

FIG.8 is a first mapping schematic diagram about the HARQ-ACK and P-CSI, in accordance with an example of the present disclosure.

FIG.9 is a second mapping schematic diagram about the HARQ-ACK and P-CSI, in accordance with an example of the present disclosure.

FIG.10 is a third mapping schematic diagram about the HARQ-ACK and P-CSI, in accordance with an example of the present disclosure.

FIG.11 is a schematic diagram illustrating structure of a device for multiplexing UCI in an uplink channel, in accordance with an example of the present disclosure.

FIG.12 is a schematic diagram illustrating structure of a device for multiplexing A-CSI and P-CSI in an uplink channel, in accordance with an example of the present disclosure.

FIG.13 is a schematic diagram illustrating structure of a device for determining modulation symbol number occupied by the UCI, in accordance with an example of the present disclosure.

FIG.14 is a schematic diagram illustrating structure of a device for determining PRB resources used for uplink transmission, in accordance with an example of the present disclosure.

To make objectives, technical means and advantages of the present disclosure more clear, detailed descriptions about the present disclosure will be provided in the following, accompanying with attached figures.

The present disclosure aims to provide a method and device, which may multiplex various kinds of uplink information in an uplink channel. The uplink information may be UCI, or may be uplink data. The uplink channel may be a PUCCH format X channel, or may be a PUSCH channel. The PUCCH format X may be obtained by extending PUCCH format 3, or may be obtained based on the PUSCH, still may be a channel in another structure. Multiple modulation symbols may be generated after processing the UCI information, e.g., perform channel encoding to the UCI information. For a PUCCH format X channel without time and frequency extension, one modulation symbol is mapped to one time-frequency RE, e.g., a PUCCH format X channel based on PUSCH structure. Alternatively, for a PUCCH format X channel with the time, and/or, frequency extension, one modulation symbol is mapped to multiple REs, e.g., a PUCCH format X channel based on PUCCH format 3 channel structure.

In a LTE system, the UCI may be divided into multiple categories, that is, HARQ-ACK, SR, P-CSI and A-CSI. A UE probably need to simultaneously feed back one kind of, some kinds of or all kinds of foregoing UCI types within one uplink subframe. CSI information is further divided into two categories. A first category is information with higher reliability requirements, such as RI. A second category is information with relatively lower reliability requirements, such as CQI/PMI. CSI information with higher reliability requirements is referred to as first type CSI information in the following. CSI information with relatively lower reliability requirements is referred to as second type CSI information. That is, reliability requirements of the first type CSI information are higher than that of the second type CSI information.

From one aspect, the present disclosure provides a method for multiplexing various kinds of UCI information in an uplink channel. A multiplexing method at the UE side will be described in the following. The base station side may adopt a corresponding method to perform the demultiplexing. FIG.2 is a flowchart illustrating a method for multiplexing UCI in an uplink channel in the present disclosure, which includes the following blocks.

In block 201, a UE divides UCI information into different categories, and respectively performs encoding, rate matching and modulation to UCI in a different category. Jointly encode the information with higher reliability requirements, including HARQ-ACK, SR and the first type CSI information. Jointly encode the second type CSI information with the lower reliability requirements.

In block 202, the UE respectively maps UCI in a different category to an uplink channel. That is, the UE respectively maps UCI information with higher reliability requirements and UCI information with lower reliability requirements to an uplink channel.

Here, the UCI information with higher reliability requirements and UCI information with lower reliability requirements may be enabled to map to non-conflict REs. Alternatively, the UCI information with higher reliability requirements may map to an RE, which covers another RE mapping to the UCI information with lower reliability requirements.

Another aspect of the present disclosure provides a method for multiplexing P-CSI and A-CSI in an uplink channel. The multiplexing method at the UE side will be described in the following. The base station side may use a corresponding method to perform the demultiplexing. When P-CSI and A-CSI need to be fed back simultaneously in one subframe, FIG.3 is a flowchart illustrating a method for multiplexing P-CSI and A-CSI in an uplink channel in the present disclosure, which includes the following blocks.

In block 301, a UE determines P-CSI needing to be fed back with A-CSI in current subframe.

Here, the P-CSI needing to be fed back with the A-CSI may be all the P-CSI, which is mapped to current subframe. Alternatively, determine that the P-CSI needing to be fed back with the A-CSI is one subset of all the P-CSI mapped to current subframe, by setting a certain criteria. That is, P-CSI of one certain cell may be fed back. Alternatively, P-CSI of multiple cells may be fed back. More particularly, suppose multiple pieces of P-CSI information needs to be fed back within one subframe, a first part of P-CSI may be fed back in PUCCH, based on a method for feeding back P-CSI in the PUCCH. The remaining P-CSI will be discarded. At this time, when needing to feed back the P-CSI together with the A-CSI, the P-CSI fed back with the A-CSI is the foregoing first part of P-CSI or a subset of the first part of P-CSI.

In block 302, the UE performs operations to the A-CSI and P-CSI needing to be fed back, such as encoding, rate matching and modulation, and maps to a PUSCH channel to be transmitted.

Still another aspect of the present disclosure provides a method for determining modulation symbol number occupied by UCI in a different category, when multiplexing the UCI information in an uplink channel. For example, regarding a PUSCH-based channel structure, one modulation symbol corresponds to one time-frequency RE. A multiplexing method at the UE side will be described in the following. The base station side may use a corresponding method to perform the de-multiplexing. FIG.4 is a flowchart illustrating a method for determining modulation symbol number occupied by UCI in the present disclosure, which includes the following blocks.

In block 401, a UE encodes UCI information needing to be fed back in current subframe.

The UE may jointly encode all the UCI information needing to be fed back in current subframe. Alternatively, the UE may divide UCI information into different categories, and respectively encode the UCI information in a different category. Jointly encode the information with higher reliability requirements, such as HARQ-ACK, SR and first type CSI information. Jointly encode the second type CSI information with lower reliability requirements.

In block 402, the UE determines a parameter

used for calculating a modulation symbol number, which corresponds to UCI to be jointly encoded. And then, the UE determines the modulation symbol number needing to be occupied based on parameter

, so as to perform operations, such as rate matching and modulation, and map to a PUSCH channel to be transmitted.

Suppose respectively configure

for various kinds of UCI information jointly encoded, after determining the joint encoding, the occupied modulation symbols may be determined based on

of one type of UCI information. Alternatively, the occupied modulation symbol may be determined, based on the maximum value of

about various kinds of UCI information.

Still another aspect of the present disclosure provides a method for determining uplink PRB resources used for uplink transmission. The multiplexing method at the UE side will be described in the following. The base station side may use a corresponding method to perform the de-multiplexing. FIG.5 is a flowchart illustrating a method for determining uplink PRB resources used for uplink transmission, which includes the following blocks.

In block 501, a UE determines occupied uplink PRB resources, based on multiple uplink channels allocated within current subframe.

Here, suppose the UE needs to transmit various kinds of signals within the uplink subframe, which include UCI information, such as HARQ-ACK, P-CSI and/or A-CSI, which also include uplink data. Multiple uplink channels may be allocated correspondingly. Thus, the UE may transmit an uplink signal by using PRB resources coming from multiple uplink channels. Here, there may be other limitation conditions for PRB number usable by the UE. For example, when performing uplink transmission based on PUSCH structure, PRB number actually used by the UE may be limited to power of 2, 3, and/or 5.

In block 502, the UE performs processes on uplink information, such as encoding, rate matching and modulation, and maps the processed information to a PUSCH channel to be transmitted.

Here, the method for mapping physical resources may be the method respectively illustrated with FIG.8-FIG.11, or may be another method, which is not limited by the present disclosure.

Embodiment 1

In a CA system, when configured cell number is greater, or size of a binding window is larger, the HARQ-ACK bit number needing to be fed back by a UE is greater, e.g., greater than 22 bits. In addition, when configured cell number is greater, CSI information needing to be fed back by a UE is increased correspondingly. Besides, a UE may need to transmit a SR in an uplink direction. Since bit number of both HARQ-ACK and CSI are increased, as shown in FIG.1, current UCI mapping method cannot meet performance requirements of UCI transmission in certain conditions. Take HARQ-ACK as an example, when bit number of HARQ-ACK is greater, while PRB number of PUSCH is less, the method for mapping the HARQ-ACK to 4 symbols adjacent to DMRS cannot guarantee transmission performance requirements of HARQ-ACK.

The processing method for multiplexing various kinds of UCI in an uplink channel provided by the embodiment will be described in the following, accompanying with different cases.

In a first case:

A UE needs to feed back P-CSI of multiple cells within one subframe. The P-CSI may be information with higher reliability requirements, e.g., RI, or may be information with lower reliability requirements, such as CQI/PMI. Alternatively, information with higher reliability requirements and information with lower reliability requirements may exist simultaneously. That is, within this subframe, P-CSI of some cells is information in RI category, while P-CSI of the other cells is information in CQI/PMI category. Here, for the last case, the information with higher reliability requirements may be much more than information with lower reliability requirements. Subsequently, the method for mapping RI to 4 symbols shown in FIG.1 cannot meet the performance requirements.

When the uplink channel is in PUCCH format X, for P-CSI of each cell fed back within one subframe, jointly encode P-CSI in RI category, and start mapping from a known modulation symbol position. And then, jointly encode the P-CSI in CQI/PMI category, and start mapping immediately following the modulation symbols of P-CSI in RI category. Finally, occupy all the modulation symbols in PUCCH format X. For example, as shown in FIG.6, for a PUCCH format X channel without time and frequency extension, start from the first sub-carrier of first symbol, map modulation symbols of P-CSI in RI category, by using a time preferred mode similar to PUSCH. And then, map the modulation symbols of P-CSI in CQI/PMI category, until occupy all the REs in the PUCCH format X. For a PUCCH format X channel with time and/or frequency extension, the PUCCH format X channel still carries multiple modulation symbols. Based on the foregoing method, these modulation symbols are respectively used for carrying the P-CSI in RI category and the P-CSI in CQI/PMI category.

When the uplink channel is PUSCH, as shown in FIG.7, for P-CSI of each cell fed back within one subframe, jointly encode P-CSI in RI category, and map from a known modulation symbol position in a time preferred mode, e.g., start from the first sub-carrier of the first symbol in the PUSCH channel. And then, jointly encode P-CSI signaling in CQI/PMI category, and start mapping immediately following the P-CSI in RI category. The remaining REs are used for mapping uplink data.

Here, since moving speed of a CA UE configured more than 5 cells is generally very slow, map information in RI category to all the symbols of a subframe will not have an impact on link performance of RI.

The methods shown in FIG.6 and FIG.7 are also applicable to scenes, where P-CSI and A-CSI are simultaneously transmitted. At this time, information in RI category in the foregoing method refers to information in RI category of P-CSI about each cell, and/or, information in RI category of A-CSI about each currently triggered cell. However, information in CQI/PMI category refers to information in CQI/PMI information of P-CSI about each cell, and/or, information in CQI/PMI category of A-CSI about each currently triggered cell. FIG.6 illustrates a case, where PUSCH is only allocated for A-CSI without scheduling uplink data. FIG.7 illustrates a case, where uplink data has been scheduled.

In a second case:

Suppose a UE needs to feed back HARQ-ACK and P-CSI of multiple cells within one subframe, take into account of information with higher reliability requirements and information with lower reliability requirements may simultaneously exist in the P-CSI, since reliability requirements of HARQ-ACK and that of information in RI category are equivalent, the HARQ-ACK and information in RI category of P-CSI may be encoded jointly. In addition, information in CQI/PMI category of the P-CSI may be encoded jointly.

When foregoing uplink channel is in PUCCH format X, jointly encode the HARQ-ACK of each cell and P-CSI in RI category, and start mapping from a known modulation symbol position. And then, jointly encode P-CSI in CQI/PMI category of each cell, and start mapping immediately following the modulation symbols of the HARQ-ACK and P-CSI in RI category. Finally, occupy all the modulation symbols in PUCCH format X. For example, as shown in FIG.8, for a PUCCH format X channel without time and frequency extension, start from the first sub-carrier of first symbol in PUCCH format X, map HARQ-ACK and P-CSI in RI category, by using a time preferred mode similar to PUSCH. And then, map P-CSI in CQI/PMI category of each cell, until occupy all the REs in PUCCH format X. For a PUCCH format X channel with time and/or frequency extension, the PUCCH format X channel still carries multiple modulation symbols. Based on the foregoing method, these modulation symbols may carry HARQ-ACK and P-CSI in RI category, or may carry P-CSI in CQI/PMI category.

When the uplink channel is PUSCH, as shown in FIG.9, jointly encode HARQ-ACK of each cell and P-CSI in RI category, and start mapping from a known modulation symbol position. For example, start from the first sub-carrier of the first symbol in PUSCH, and map with a time preferred mode. And then, jointly encode P-CSI signaling in CQI/PMI category of each cell, and start mapping immediately following the P-CSI in RI category. The remaining REs are used for mapping uplink data.

Here, since a CA UE configured with more than 5 cells generally moves slowly, after mapping HARQ-ACK and information in RI category to all the Orthonogal Frequency Division Multiplexing (OFDM) symbols of a subframe, link performance of HARQ-ACK and RI will not be affected.

The method respectively illustrated with FIG.8 and FIG.9 is also applicable to scenes, where HARQ-ACK and A-CSI are simultaneously transmitted. At this time, PRB number of PUSCH is greater than 1. The information in RI category of foregoing method refers to information in RI category of A-CSI of each cell. However, the information in CQI/PMI category is about A-CSI of each cell currently triggered. FIG.8 illustrates a case, where PUSCH is only allocated for A-CSI without scheduling uplink data. FIG.9 illustrates a case, where uplink data has been scheduled.

The method respectively illustrated with FIG. 8 and FIG.9 is also applicable to scenes, where HARQ-ACK, P-CSI and A-CSI are transmitted simultaneously. At this time, PRB number of PUSCH may be greater than 1. The information in RI category of foregoing method refers to information in RI category of P-CSI of each cell, and/or, information in RI category of A-CSI of each currently triggered cell. However, the information in CQI/PMI category refers to information in CQI/PMI category of P-CSI of each cell, and/or, information in CQI/PMI category of A-CSI of each currently triggered cell. FIG.8 illustrates a case, where PUSCH is only allocated for A-CSI without scheduling uplink data. FIG.9 illustrates a case, where uplink data has been scheduled.

Advantages achieved by the methods illustrated with FIG.6-FIG.9 are as follows. When processing different combinations of UCI information, a consistent method is used to map various kinds of UCI information. That is, reliability of UCI is differentiated. Jointly encode information with higher reliability requirements, such as HARQ-ACK, SR and first type CSI information. Jointly encode second type CSI information with lower reliability requirements. By adopting foregoing method, multiplexing requirements of A-CSI may also be met. Actually, information with higher reliability requirements (such as RI) and information with lower reliability requirements (such as CQI/PMI) of A-CSI need to be respectively encoded, and mapped to a PUSCH channel, since specific contents of the second type CSI information depends on the first type CSI information. That is, the base station needs to firstly decode the first type CSI information, and then determine bit number and contents of the second type CSI information.

Embodiment 2

In current CA system, when needing to feed back P-CSI and A-CSI within one subframe, the processing method is to feed back A-CSI and discard P-CSI. However, when the number of configured cell is greater, CSI information amount needing to be fed back by a UE is increased correspondingly. Probability of P-CSI and A-CSI needing to be fed back within one subframe is also increased correspondingly. To reduce impact on downlink transmission, it is necessary to support transmission of P-CSI and A-CSI within one subframe. At this time, all the currently triggered A-CSI needs to be fed back. However, for P-CSI within such subframe, feed back some P-CSI or all the P-CSI based on a certain criteria. Several preferred methods of the present disclosure will be described in the following.

A first method is to transmit P-CSI of Pcell and A-CSI. That is, when P-CSI mapping to one subframe includes P-CSI of Pcell, a UE feeds back A-CSI and P-CSI of Pcell; otherwise, the UE only feeds back A-CSI. Since Pcell is the most important work cell of the UE, stable work of the UE may be guaranteed when ensuring the CSI feedback of Pcell.

A second method is to transmit A-CSI and P-CSI of a cell configured with a PUCCH channel for feeding back UCI information. That is, when P-CSI mapping to one subframe includes P-CSI of a cell configured with a PUCCH channel for feeding back UCI information, a UE feeds back P-CSI of such cell and A-CSI; otherwise, the UE only feeds back A-CSI. Advantages of such method are similar to that achieved by the first method. Since a cell configured with a PUCCH channel for feeding back UCI information carries out a task of feeding back UCI, the effectiveness of downlink transmission may be well guaranteed by enabling CSI feedback of such a cell.

A third method is to feed back P-CSI in RI category and A-CSI. That is, when P-CSI mapping to one subframe includes P-CSI in RI category of a cell, a UE feeds back P-CSI in RI category of such cell and A-CSI; otherwise, the UE only feeds back A-CSI. Since reliability requirements of RI are higher than that of CQI/PMI, RI needs special protection. Effects resulted from discarding P-CSI in RI category may be greater than that resulted from discarding P-CSI in CQI/PMI category.

A fourth method is to feed back A-CSI and P-CSI with a priority higher than a set threshold. For example, firstly determine CSI with the highest priority in A-CSI. And then, take the CSI’s characteristics as a threshold. For example, take one or more parameters of the CSI (e.g., CSI report type, CSI process identity (ID), cell ID and CSI subframe set index) as the threshold. Select P-CSI to be fed back within one subframe. Only P-CSI with higher priority may be fed back with A-CSI. For example, define the threshold based on four parameters. Alternatively, define the threshold based on last three parameters (e.g., CSI process ID, cell ID and CSI subframe set index). Still alternatively, define the threshold only based on one parameter (such as cell ID). Here, the method for comparing A-CSI’s priority with P-CSI’s priority is as follows. Only compare an A-CSI’s parameter with a corresponding P-CSI’s parameter, without considering factors of period feedback and aperiod feedback. For example, define the threshold with four parameters. Firstly compare the CSI report type. When the CSI report type is the same, continuously compare the CSI process ID, and so on. By adopting such method, only P-CSI with higher priority is fed back with A-CSI. Subsequently, more important P-CSI is still reported, when feedback overhead is under control. Alternatively, firstly determine CSI with the lowest priority in A-CSI. And then, take one or more parameters of the CSI as the threshold. Select P-CSI to be fed back within one subframe. Only P-CSI with higher priority will be fed back with A-CSI. By adopting foregoing method, feedback overhead is greater, since only P-CSI with particularly low priority has been discarded. However, more CSI has been fed back, so as to facilitate downlink transmission. Alternatively, after determining a threshold parameter, e.g., after determining the threshold with foregoing two methods, only when the priority of all the P-CSI mapping to the same subframe is higher than the corresponding threshold, feed back all the P-CSI with A-CSI; otherwise, only feed back A-CSI.

A fifth method is to feed back some P-CSI with a different CSI process ID, a different cell ID and/or a different CSI subframe set index, compared with A-CSI, in addition to feeding back A-CSI. Since information fed back by A-CSI is more sufficient than that fed back by P-CSI, when CSI with the same CSI process ID, the same cell ID and the same CSI subframe set index has been fed back with A-CSI, it is not necessary to feed back again with P-CSI. By adopting foregoing method, the feedback overhead may be reduced, when CSI information amount fed back is maximized. Alternatively, only when the CSI process ID, cell ID and CSI subframe set index of all the P-CSI corresponding to one subframe are different from that of A-CSI within the same subframe, support to feed back foregoing all the P-CSI and A-CSI; otherwise, only feed back A-CSI.

A sixth method is to simultaneously configure whether a P-CSI report can be fed back together with A-CSI, when configuring the P-CSI report of a UE with high level signaling. When the configuration supports to feed back the P-CSI report together with A-CSI, the UE simultaneously feeds back the P-CSI and the A-CSI, when the P-CSI and the A-CSI are in the same subframe; otherwise, the UE only feeds back the A-CSI.

A seventh method is to feed back A-CSI and all the P-CSI configured for the subframe. At this time, when a cell is de-activated, it is necessary to reserve bits for P-CSI of this cell. Alternatively, only feed back P-CSI of a cell currently in activated state, which has been mapped to the subframe. By adopting such method, it is necessary to feed back a large number of bits of P-CSI, which may be duplicated with A-CSI.

An eighth method is as follows. Suppose multiple P-CSI needs to be fed back within one subframe, on the basis of the method for feeding back P-CSI in PUCCH, first part of P-CSI may be fed back in PUCCH, while the remaining P-CSI may be discarded. At this time, when needing to feed back P-CSI together with A-CSI, the P-CSI fed back with A-CSI is foregoing first part of P-CSI or a subset thereof. Here, the method for determining a subset of foregoing first part of P-CSI may be one method in foregoing seven methods.

A ninth method is to trigger a different value of CSI request field of A-CSI, so as to indicate a different action. That is, values of some CSI request fields indicate to feed back A-CSI only, while values of other CSI request fields indicate to simultaneously feed back A-CSI and P-CSI. Such operation may be configured with high level signaling, or may be predefined. For example, value “01” of CSI request field indicates to only feed back A-CSI, while other values except for value “00” in CSI request field indicate to simultaneously feed back A-CSI and P-CSI. Furthermore, the method for simultaneously feeding back A-CSI and P-CSI may be one of foregoing eight methods.

A tenth method is to consider a UE’s capability limitations for processing A-CSI, when determining P-CSI fed back with A-CSI. For example, a UE may be triggered to feed back a maximum number of CSI processes N of A-CSI within one subframe, it is necessary to guarantee that the number of CSI processes of P-CSI and A-CSI fed back is less than or equal to N. After determining P-CSI with one of foregoing nine methods or another method, when the sum of number of CSI processes of A-CSI and P-CSI is greater than N, select and feed back P-CSI with a higher priority, based on the priority of each P-CSI. And discard the remaining P-CSI. For example, re-use priority strategy for feeding back P-CSI in PUCCH to process the priority of P-CSI fed back with A-CSI. For example, take capabilities of a UE in current LTE system as an example, when the number of CSI processes of A-CSI which may be triggered within one subframe is not greater than 5, after selecting P-CSI with one of foregoing nine methods or another method, enable the number of CSI processes of A-CSI and P-CSI triggered corresponding to one subframe is less than or equal to 5. Alternatively, when simultaneously feeding back A-CSI and P-CSI, after being configured with high level signaling, or after being predefined, a UE may be triggered to simultaneously feed back a maximum number of CSI processes M within one subframe, and M>N. After determining P-CSI with one of foregoing nine methods or another method, when sum of the number of CSI processes of A-CSI and P-CSI is greater than M, select and feed back P-CSI with a higher priority, based on the priority of each P-CSI, and discard the remaining P-CSI.

Embodiment 3

There may be various kinds of UCI information needing to be transmitted within one uplink subframe. Accompanying with increasing number of configured cells of a UE, foregoing requirements become more prominent. In one subframe, a UE may perform joint encoding, rate matching and modulation on UCI information needing to be fed back in current subframe, and then map to an uplink channel. Alternatively, a UE may divide UCI information into different categories, and respectively perform encoding, rate matching and modulation on UCI information in a different category. For example, jointly encode information with higher reliability requirements, including HARQ-ACK, SR and first type CSI information. Jointly encode second type CSI information with lower reliability requirements. For a group of UCI information to be jointly encoded, it is necessary to calculate the number of occupied modulation symbols, so as to be mapped to an uplink channel.

In current LTE CA system, when needing to multiplex HARQ-ACK, RI and PMI/CQI in a PUSCH, respectively configure parameters

,

and

. And respectively calculate number of REs occupied by HARQ-ACK, RI and PMI/CQI in the PUSCH. For example, on the basis of LTE specification, when transmitting a TB in a PUSCH, calculate the number of REs carrying HARQ-ACK or RI with the following formula.

Here, O represents the number of bits of HARQ-ACK or RI.

represents the number of subcarriers in a single-carrier frequency-division multiple access (SCFDMA) symbol of a PUSCH channel.

represents the number of SCFDMA symbols of an initial PUSCH transmission of the TB.

, C, and K_r are determined by an initial PDCCH scheduling the TB, which respectively represent the number of subcarriers transmitted by initial PUSCH, the number of codeblocks (CBs) divided from the TB and the number of bits of each CB. For HARQ-ACK,

. For RI,

. Based on foregoing formula for calculating

or a similar method, the number of modulation symbols allocated for UCI may be controlled by adjusting parameter

.

When feeding back UCI in a PUCCH format X channel, configure parameters

,

and

, which are used for calculating the number of modulation symbols occupied by HARQ-ACK, RI and PMI/CQI in the PUCCH format X channel. Foregoing parameters

、

and

may re-use a parameter , which corresponds to UCI fed back by the PUSCH. Alternatively, since interference distribution of a PUCCH format X channel is generally different from that of a PUSCH channel, parameters

,

and

may be different. Thus, the present disclosure puts forward to configure new parameters

,

and

for a PUCCH format X channel, so as to determine the number of modulation symbols occupied by a corresponding UCI type. Since performance requirements of HARQ-ACK and RI are similar, configure one parameter

for a PUCCH format X channel, which is applied to the following scenes. Only transmit HARQ-ACK. Only transmit RI. Simultaneously transmit HARQ-ACK and RI.

Furthermore, when needing to multiplex HARQ-ACK, RI and PMI/CQI in a PUSCH, if the number of bits of a same UCI type is different, optimized parameter

is also different. Particularly for HARQ-ACK, since a base station needs to perform a DTX detection on HARQ-ACK transmission, when the number of HARQ-ACK bits is less, it is necessary to configure a greater

to guarantee the DTX detection performance. When the number of HARQ-ACK bits is increased, a less

may meet performance requirements. Suppose a UE may transmit UCI in the PUCCH based on various PUCCH formats, e.g., when the number of UCI bits needing to be fed back is less, which does not exceed 22 bits, still adopt current PUCCH format, such as format 2 or 3 to transmit UCI. Correspondingly, when the number of UCI bits needing to be fed back is greater, e.g., greater than 22 bits, adopt a newly defined PUCCH format X to transmit UCI. Thus, for one kind of UCI information, regarding different PUCCH channel formats, the present disclosure puts forward to respectively configure different parameters

, so as to control the number of REs occupied by UCI information transmission. Take HARQ-ACK as an example, when a UE feeds back HARQ-ACK with PUCCH format 3, configure one value of parameter

. When a UE feeds back HARQ-ACK with PUCCH format X, configure another value of parameter

. The method may be only used for HARQ-ACK. That is, configure a different parameter

corresponding to a different PUCCH format. Alternatively, the method may be applied for RI. That is, configure a different parameter

corresponding to a different PUCCH format. Still alternatively, the method may be applied for HARQ-ACK and RI. That is, configure different parameters

and

corresponding to a different PUCCH format. Alternatively, the method may be applied for HARQ-ACK, RI and PMI/CQI. That is, configure different parameters

,

and

corresponding to a different PUCCH format.

Based on the method in Embodiment 4, when allocating a PUSCH channel, only transmit foregoing information with PRB of the PUSCH channel. Correspondingly, the number of PRBs used for transmitting UCI and uplink data is equal to the number of PRBs of PUSCH. Alternatively, transmit information in an extended PUSCH channel, which is formed by PRB of PUSCH channel and PRB of PUCCH format X. Correspondingly, the number of PRBs used for transmitting UCI and uplink data is equal to sum of the number of PRBs of PUSCH and the number of PRBs of PUCCH format X.

Based on the method in Embodiment 4, during the process of feeding back UCI information, when only one PUCCH format X channel is allocated within one subframe, corresponding number of PRBs used for transmitting UCI is equal to the number of PRBs of the PUCCH format X channel. Alternatively, when various kinds of UCI needing to be fed back within one subframe, and multiple PUCCH format X channels have been configured correspondingly, only occupy one PUCCH format X channel to transmit foregoing various kinds of UCI. Correspondingly, the number of PRBs used for transmitting UCI is equal to the number of PRBs of the PUCCH format X channel. Still alternatively, simultaneously utilize PRBs of multiple PUCCH format X channels to transmit UCI. For example, transmit UCI in an extended PUCCH channel formed by all the PRBs of multiple PUCCH format X channels, based on PUSCH structure. Correspondingly, the number of PRBs used for transmitting UCI is equal to total number of PRBs of foregoing multiple PUCCH format X channels. A method for determining the number of modulation symbols occupied by UCI in one uplink subframe in the present disclosure will be described in the following, accompanying with different cases.

In a first case:

Suppose all the UCI fed back in one uplink channel is encoded jointly, e.g., a UE needs to feed back P-CSI of multiple cells within one subframe, the P-CSI may be information with higher reliability requirements, such as RI. Alternatively, the P-CSI may be information with lower reliability requirements, such as CQI/PMI. Still alternatively, information with higher reliability requirements and information with lower reliability requirements may exist simultaneously. That is, in this subframe, P-CSI of some cells is information in RI category, while P-CSI of other cells is information in CQI/PMI category. Furthermore, suppose jointly encode the P-CSI of multiple cells fed back within one subframe, when needing to multiplex foregoing UCI and uplink data in PUSCH, employ the following method to determine

used for calculating modulation symbol number.

When all the P-CSI belongs to one type, adopt

of a corresponding type. That is, when all the P-CSI is information in RI category,

. When all the P-CSI is information in CQI/PMI category,

.

When the P-CSI fed back within the subframe simultaneously includes information with higher reliability requirements and information with lower reliability requirements, calculate the needed modulation symbol number based on maximum value of

and

about two types of information, that is,

. Generally speaking, the result is to calculate modulation symbol number, by using

of information with higher reliability requirements. That is,

. Alternatively, since performance requirements of RI are higher than that of CQI/PMI, directly predefine to calculate modulation symbol number based on

.

In a second case:

Suppose a UE divides UCI into different categories, and respectively performs encoding, rate matching and modulation on UCI in a different category, e.g., in a scene, where a UE needs to feed back HARQ-ACK and P-CSI of multiple cells within one subframe, jointly encode HARQ-ACK and P-CSI in RI category with higher reliability requirements. Simultaneously, jointly encode all the P-CSI in CQI/PMI category with lower reliability requirements.

When needing to multiplex foregoing UCI and uplink data in PUSCH, employ the following method to determine

, which is used for calculating modulation symbol number.

For P-CSI in CQI/PMI category,

.

When there is no P-CSI in RI category, for HARQ-ACK,

. When there is P-CSI in RI category, after jointly encoding HARQ-ACK and RI, calculate the needed modulation symbol number, based on the maximum value of

and

about two types of information, that is,

. Here, since performance requirements of RI and HARQ-ACK are similar,

and

may also be close, however, which one is greater cannot be determined. Alternatively, since performance requirements of RI and HARQ-ACK are similar, directly predefine to calculate modulation symbol number based on

of one UCI type therein. For example, predefine

for such case.

The foregoing method for determining to multiplex HARQ-ACK and P-CSI in PUSCH may also be applied to a scene, where HARQ-ACK and A-CSI are fed back in PUSCH. At this time, the information in RI category in foregoing method refers to information in RI category of A-CSI of each cell triggered currently, while the information in CQI/PMI category is about A-CSI of each cell currently triggered.

The foregoing method for determining to multiplex

of HARQ-ACK and P-CSI in PUSCH may be applied to the following scene, where HARQ-ACK, P-CSI and A-CSI are fed back in PUSCH. At this time, the information in RI category in the foregoing method refers to information in RI category of P-CSI of each cell, and/or, information in RI category of A-CSI of each cell currently triggered. However, the information in CQI/PMI category is about P-CSI of each cell, and/or, about A-CSI of each cell triggered currently.

When needing to multiplex foregoing HARQ-ACK and P-CSI in PUCCH format X, since all the modulation symbols are used for transmitting UCI, it is only necessary to respectively calculate proportion of modulation symbol number occupied by two types of UCI to be encoded. Record parameter

, which is about HARQ-ACK and P-CSI in RI category with higher reliability requirements.

may be used to determine necessary modulation symbol number. Calculate modulation symbol number respectively occupied by UCI with two reliability requirements based on

and

. For example, suppose PUCCH format X reuses the PUSCH structure, allocate modulation symbol number

for HARQ-ACK and P-CSI in RI category with higher reliability requirements.

represents subcarrier number included in PUCCH format X.

represents symbol number used for transmitting data within a subframe of PUCCH format X channel. O represents bit number of HARQ-ACK and P-CSI in RI category with higher reliability requirements.

represents bit number calculated based on CQI/PMI,

. Based on foregoing method, when allocated modulation symbol number of CQI/PMI is less, e.g., encoding rate exceeds a certain threshold, discard CQI/PMI, and adopt all the modulation symbols to transmit HARQ-ACK and RI. The foregoing threshold is predefined, or is configured with high level signaling.

When feeding back UCI in PUCCH format X, foregoing parameters

,

and

may be the same as parameter

, when corresponds to UCI fed back in PUSCH. Alternatively, even if PUCCH format X re-uses the PUSCH structure, since all the interference distributions received by PUCCH format X are generally different from that received by PUSCH, parameters

,

and

thereof are generally different. The present disclosure puts forward to define new parameters

,

and

for PUCCH format X, which are used for determining modulation symbol number occupied by a corresponding UCI type. Since performance requirements of HARQ-ACK and RI are similar, one parameter

may be configured for PUCCH format X, which is only used in the following scenes. Only transmit HARQ-ACK. Only transmit RI. Simultaneously transmit HARQ-ACK and RI.

Similar to a case where UCI is fed back with PUCCH format X, when PUSCH is only allocated for A-CSI without scheduling uplink data, since all the modulation symbols are used for transmitting UCI, it is only necessary to respectively calculate proportion of modulation symbol number occupied by two kinds of UCI to be encoded. At this time, PRB number of PUSCH may be greater than 1. When needing to feed back HARQ-ACK and A-CSI in PUSCH, information in RI category in foregoing method is about A-CSI of each cell currently triggered. However, information in CQI/PMI category is about A-CSI of each cell currently triggered. When needing to feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, information in RI category of foregoing method is about P-CSI of each cell, and/or, is about A-CSI of each cell currently triggered. However, information in CQI/PMI category is about P-CSI of each cell, and/or, is about A-CSI of each cell currently triggered. Here, since CQI/PMI bit number of A-CSI depends on RI of A-CSI, when calculating RE number occupied by different UCI, bit number of information in CQI/PMI category of A-CSI may be calculated, by taking 1 as RI value.

Alternatively, when PUSCH is only allocated for A-CSI without scheduling uplink data, since all the modulation symbols are allocated for UCI, firstly calculate RE number occupied by HARQ-ACK and CSI in RI category, and then all the remaining REs are used for transmitting information in CQI/PMI category. Record a parameter

of HARQ-ACK and CSI in RI category, which is used for determining necessary modulation symbol number. Calculate modulation symbol number Q' occupied by HARQ-ACK and CSI in RI category, based on

and

. For example,

.

represents subcarrier number of PUSCH channel.

represents SCFDMA symbol number used for transmitting data within a subframe. O represents bit number of HARQ-ACK and P-CSI in RI category.

represents bit number of CQI/PMI. Bit number of CQI/PMI in A-CSI may be calculated, by taking 1 as RI value. Based on such method, when allocated modulation symbol number of CQI/PMI is too less, e.g., encoding rate has exceeded a certain threshold, discard CQI/PMI, and adopt all the modulation symbols to transmit HARQ-ACK and RI. The foregoing threshold is predefined, or is configured with high level signalling.

In a third case

Suppose needing to simultaneously feed back HARQ-ACK, CSI with higher reliability requirements and CSI with lower reliability requirements in an uplink channel, and all the foregoing UCI information is encoded jointly, e.g., in a case where a UE adopts a method of joint encoding to feed back all the information of HARQ-ACK and P-CSI, when needing to multiplex foregoing UCI and uplink data in PUSCH, employ the following method to determine

, which is used for calculating modulation symbol number.

When there is only one kind of UCI at present, adopt

of a corresponding type. That is, when there is only HARQ-ACK,

. When there is only P-CSI and all the P-CSI is in RI category,

. When there is only P-CSI and all the P-CSI is in CQI/PMI category,

.

When there are various kinds of UCI at present, calculate modulation symbol number based on the maximum value of

of these UCI types. Take the following scene as an example, where HARQ-ACK, P-CSI in RI category with higher reliability requirements and CSI in CQI/PMI category with lower reliability requirements exist simultaneously, calculate the needed modulation symbol number based on

. Generally speaking, a result is to calculate the modulation symbol number, based on

of information with higher reliability requirements, e.g.,

or

. Here, since performance requirements of RI and HARQ-ACK are similar,

and

may also be close, however which one is greater may not be determined. Alternatively, since performance requirements of HARQ-ACK and RI are higher than that of CQI/PMI, directly calculate the needed modulation symbol number, based on maximum value of

about HARQ-ACK and

about RI, that is,

. Here, since performance requirements of RI and HARQ-ACK are similar,

and

may also be close, however which one is greater cannot be determined. Alternatively, furthermore, since performance requirements of RI and HARQ-ACK are similar, directly predefine to calculate modulation symbol number based on

of one UCI type. For example, in this case, predefine

. Alternatively, configure one parameter

, which is applied to the following cases. Transmit HARQ/ACK, and/or RI. At this time, CSI in CQI/PMI category may also be transmitted simultaneously.

In a fourth case

Suppose a UE divides UCI in different categories, and respectively performs encoding, rate matching and modulation on UCI in a different category, e.g., in a case, where a UE needs to feed back HARQ-ACK and P-CSI of multiple cells within one subframe, here, directly take HARQ-ACK as UCI in one category to be encoded. Jointly encode all the P-CSI without differentiating RI and CQI/PMI.

When needing to multiplex HARQ-ACK, P-CSI and uplink data in PUSCH, adopt the following method to determine

, which is used for calculating modulation symbol number. For HARQ-ACK,

. For P-CSI, configure parameter

based on foregoing method for processing first case, e.g.,

. When needing to simultaneously feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, for HARQ-ACK,

. Jointly encode all the P-CSI and RI of A-CSI, configure

based on information with higher reliability requirements, e.g.,

. Jointly encode CQI/PMI of A-CSI,

.

When needing to multiplex HARQ-ACK and P-CSI in PUCCH format X, since all the modulation symbols are allocated for UCI, calculate modulation symbol number occupied by each UCI type, based on bit number and weight

of each UCI type. Record parameter

processing P-CSI mapping with

, e.g.,

, calculate modulation symbol number occupied by UCI with two kinds of reliability requirements, based on

and

. For example, suppose PUCCH format X reuses PUSCH structure, the modulation symbol number allocated for HARQ-ACK may be represented with

.

represents subcarrier number included by a PUCCH format X channel.

represents symbol number used for transmitting data within a subframe of PUCCH format X channel. O represents bit number of HARQ-ACK.

represents the total bit number of P-CSI. Based on the method, when allocated modulation symbol number of P-CSI is too less, e.g., encoding rate has exceeded a certain threshold, discard P-CSI, and adopt all the modulation symbols to transmit HARQ-ACK. The foregoing threshold is predefined, or configured with high level signalling.

Similar to a case where UCI is fed back in PUCCH format X, under the circumstances that PUSCH is only allocated for A-CSI without scheduling uplink data, when needing to feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, information in RI category of foregoing method refers to all the P-CSI and information in RI category of A-CSI of each cell currently triggered. Jointly encode all the P-CSI and RI of A-CSI. Configure

based on information with higher reliability requirements, e.g.,

. However, information in CQI/PMI category is about P-CSI of each cell, and/or, is about A-CSI of each cell currently triggered. Here, since bit number of CQI/PMI about A-CSI depends on RI of A-CSI, when calculating RE number respectively occupied by different UCI, bit number of information in CQI/PMI category of A-CSI may be calculated, by taking 1 as RI value.

When feeding back UCI in PUCCH format X, foregoing parameters

、

and

may be respectively the same as a corresponding parameter

, when feeding back UCI in PUSCH. Alternatively, even if PUCCH format X is a structure reusing PUSCH structure, however, since all the interference distributions received by PUCCH format X are generally different from that received by PUSCH, parameters

,

and

thereof are generally different. Thus, the present disclosure puts forward to define new parameters

,

and

for PUCCH format X, which are used for determining modulation symbol number occupied by a corresponding UCI type.

In a fifth case:

In a case where a UE respectively performs encoding, rate matching and modulation on HARQ-ACK, RI and CQI/PMI, when uplink data exists, a method for processing RE mapping will be described in the following. When needing to multiplex foregoing HARQ-ACK and P-CSI in PUSCH, for HARQ-ACK, RI and CQI/PMI, respectively adopt parameters

,

and

to calculate modulation symbol number. When needing to multiplex HARQ-ACK and A-CSI in PUSCH, for HARQ-ACK, RI and CQI/PMI, respectively adopt parameters

,

and

to calculate modulation symbol number. When needing to simultaneously feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, for HARQ-ACK,

. Jointly encode information in RI category of P-CSI and RI of A-CSI,

. Jointly encode information in CQI/PMI category of P-CSI and CQI/PMI of A-CSI,

.

When needing to multiplex foregoing HARQ-ACK and P-CSI with PUCCH format X, since all the modulation symbols are allocated for UCI, calculate modulation symbol number occupied by each UCI type, based on weight

and bit number of each UCI type, that is, HARQ-ACK, RI and CQI/PMI. For example, suppose PUCCH format X is a structure reusing PUSCH structure, allocate modulation symbol number

for HARQ-ACK.

represents subcarrier number included by a PUCCH format X channel.

represents bit number of RI.

represents bit number of CQI/PMI. Based on foregoing method, when modulation symbol number allocated for CQI/PMI is less, e.g., encoding rate has exceeded a certain threshold, discard CQI/PMI, and adopt all the modulation symbols to transmit HARQ-ACK and RI. The foregoing threshold is predefined, or is configured with high level signalling.

Similar to the case where UCI is fed back in PUCCH format X, when PUSCH is only allocated for A-CSI without scheduling uplink data, since all the modulation symbols are used for UCI, calculate modulation symbol number respectively occupied by each UCI type, based on bit number and weight

of each UCI type, that is, HARQ-ACK, RI and CQI/PMI. When needing to feed back HARQ-ACK and A-CSI in PUSCH, information in RI category of foregoing method is about A-CSI of each cell currently triggered, while information in CQI/PMI category is about A-CSI of each cell currently triggered. When needing to feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, information in RI category of foregoing method is about P-CSI of each cell, and/or, is about A-CSI of each cell triggered currently, while information in CQI/PMI category is about P-CSI of each cell, and/or, is about A-CSI of each cell triggered currently.

Alternatively, when PUSCH is only allocated for A-CSI without scheduling uplink data, since all the modulation symbols are used for UCI, firstly calculate RE number occupied by HARQ-ACK and CSI in RI category, and then all the remaining REs are used for transmitting information in CQI/PMI category. For example, for one UCI type, occupied modulation symbol number

. When calculating modulation symbol number of HARQ-ACK,

. When calculating modulation symbol number of RI,

.

represents subcarrier number of PUSCH channel.

represents SCFDMA symbol number used for transmitting data within a subframe. O represents bit number of HARQ-ACK.

represents bit number of CQI/PMI. Bit number of CQI/PMI about A-CSI may be calculated, by taking 1 as RI value. Based on foregoing method, when modulation symbol number allocated for CQI/PMI is less, e.g., encoding rate has exceeded a certain threshold, discard CQI/PMI, and adopt all the modulation symbols to transmit HARQ-ACK and RI. The foregoing threshold is predefined, or is configured with high-level signalling.

Specifically speaking, when needing to feed back HARQ-ACK and A-CSI in PUSCH, information in RI category is about A-CSI of each cell triggered currently,

. Information in CQI/PMI category is about A-CSI of each cell triggered currently. That is, O_CQI= O_CQI-MIN. O_CQI-MIN represents bit number of CQI/PMI calculated when RI value is 1. When needing to feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, information in RI category is about P-CSI of each cell, and is about A-CSI of each cell triggered currently. Jointly encode all the information in RI category,

. Information in CQI/PMI category is about P-CSI of each cell, and is about A-CSI of each cell triggered currently. Jointly encode all the information in CQI/PMI category.

.

represents bit number of information in CQI/PMI category of P-CSI.

represents calculated bit number of CQI/PMI of A-CSI, when RI value is 1. Alternatively, when needing to feed back HARQ-ACK, P-CSI and A-CSI in PUSCH, information in RI category of foregoing method refers to all the P-CSI, and information in RI category of A-CSI of each cell triggered currently. Jointly encode all the information in RI category, and configure

based on information with higher reliability requirements, e.g.,

. Information in CQI/PMI category is about A-CSI of each cell triggered currently. That is, O_CQI = O_CQI-MIN. O_CQI-MIN represents calculated bit number of CQI/PMI of A-CSI, when RI value is 1. Here, since bit number of CQI/PMI of A-CSI depends on RI of A-CSI, when calculating RE number occupied by different UCI, bit number of information in CQI/PMI category of A-CSI may be calculated, by taking 1 as RI value.

When feeding back UCI in PUCCH format X, foregoing parameters

,

and

may be respectively the same as a corresponding parameter

, when feeding back UCI in PUSCH. Alternatively, even if the PUCCH format X is a structure reusing PUSCH structure, however, since all the interference distributions received by PUCCH format X are generally different from that received by PUSCH, parameters

,

and

are generally different. Thus, the present disclosure puts forward to define new parameters

,

and

Embodiment 4

In the CA system, when configured cell number is greater, or size of binding window is greater, a UE needs to feed back a greater bit number of HARQ-ACK, e.g., greater than 22 bits. In addition, when configured cell number is greater, CSI needing to be fed back by a UE is also increased correspondingly. Besides, the UE may need to transmit a SR in an uplink direction. To support feedback of UCI with more bits in PUCCH, it is necessary to define a new PUCCH format, e.g., foregoing PUCCH format X. Here, suppose PRB mapping to PUCCH format X only supports multiplexing one PUCCH format X channel. One PUCCH format X channel may occupy one or more PRBs. That is, once PUCCH format X channel has been actually allocated, the PRB thereof is dedicated to a UE. For example, PUCCH format X may be a structure multiplexing PUSCH. There is only one symbol in each timeslot used for DMRS. Alternatively, DMRS density may also be increased, e.g., allocate two DMRS symbols within each timeslot. When a UE needs to transmit various kinds of signals in an uplink subframe, including UCI, such as HARQ-ACK, P-CSI, and/or, A-CSI, in which the signals may also include uplink data, multiple uplink channels have been allocated correspondingly, the embodiment describes a method for transmitting an uplink signal by utilizing multiple such uplink channels.

Suppose a UE needs to simultaneously transmit HARQ-ACK and P-CSI within one subframe, dynamically indicate one PUCCH format X resource for HARQ-ACK, record PRB number thereof with N1. Semi-statically configure one PUCCH format X resource for P-CSI, and record PRB number thereof with N2.

The UE may transmit HARQ-ACK and P-CSI, by using one of foregoing two PUCCH format X channels. For example, the UE may use a PUCCH format X channel with greater PRB number, such that encoding rate of UCI is lower, which helps to guarantee link performance.

Alternatively, since PRBs occupied by these two PUCCH format X resources are allocated to this UE, another processing method is to simultaneously utilize uplink resources of PRB occupied by these two PUCCH format X channels, so as to transmit HARQ-ACK and P-CSI. Here, the UE may use all (N1+N2) PRBs of these two PUCCH format X channels to transmit HARQ-ACK and P-CSI. Alternatively, the UE may use some PRBs of all (N1+N2) PRBs of these two PUCCH format X channels to transmit the HARQ-ACK and P-CSI. The method of selecting some PRBs from all (N1+N2) PRBs is not limited by the present disclosure. For example, record PRB number used for transmitting HARQ-ACK and P-CSI with N, in which N is less than (N1+N2). For a PUCCH format X channel based on PUSCH, these N PRBs correspond to PUSCH channel resources occupying N PRBs. At present, the LTE system only supports to take power of 2, 3 and/or 5 as PRB number of PUSCH. When foregoing requirements still need to be met and N does not meet foregoing power condition, try to reduce PRB number, e.g., N-1, N-2, and so on. Firstly take the maximum value of power of 2, 3 and/or 5 as PRB number, record the PRB number with n. The method of selecting n PRBs from N PRBs to transmit UCI is not limited in the present disclosure. As shown in FIG.10, suppose each PUCCH format X resource respectively occupies one PRB, a method for transmitting PUSCH with these two PRBs may be used to process UCI transmission. That is, double the length of DMRS sequence. For each symbol of 24 modulation symbols, perform Pre-discrete fourier transformation (Pre-DFT) transformation on 24 modulation symbols of these two PRBs. In the schematic diagram illustrated with FIG.10, suppose various UCI is mapped based on a time preferred mode. However, specific UCI mapping method is not limited in the present disclosure. In some cases, allocated PRBs of PUCCH format X channel used for transmitting HARQ-ACK and semi-statically configured PRBs of PUCCH format X channel used for transmitting P-CSI may be partially overlapped, or completely overlapped. That is, actual PRB number used for transmitting HARQ-ACK and P-CSI may be greater than or equal to min(N1, N2), however is less than (N1+N2).

Suppose a UE needs to simultaneously transmit UCI and uplink data within one subframe, the UCI here may only include HARQ-ACK, or only include P-CSI, or simultaneously include HARQ-ACK and P-CSI, correspondingly, a base station may only allocate one PUCCH format X channel for the UE. The base station may also allocate two PUCCH format X channels for the UE, which respectively correspond to HARQ-ACK and P-CSI. Here, record PRB number of PUCCH format X channel used for transmitting HARQ-ACK with N1. Record PRB number of PUCCH format X channel used for transmitting P-CSI with N2. In addition, the UE also allocates a PUSCH channel used for transmitting uplink data, and record PRB number of such PUSCH with NPUSCH. At this time, since foregoing allocated PUCCH format X channel is allocated to this UE, one processing method is to simultaneously utilize PRB of PUCCH format X and PRB of PUSCH to transmit the UCI and uplink data.

The UE may utilize PRB of one PUCCH format X channel together with PRB of PUSCH to transmit the UCI and uplink data. Record PRB number of PUCCH format X channel used for uplink transmission with M. That is, M is equal to N1 or N2. And then, the UE performs the uplink transmission with uplink resources of (NPUSCH+M) PRBs. For example, when respectively configuring a PUCCH format X channel for HARQ-ACK and P-CSI, PRB of one PUCCH format X channel therein may be used with the PUSCH to perform uplink transmission, e.g., use the PUCCH format X channel allocated for the P-CSI. Here, since PRB is semi-statically allocated to P-CSI, even if the UE does not use the PRB resource, there is no mechanism for a base station to fully utilize foregoing PRB resources. Alternatively, adopt a PUCCH format X channel dynamically allocated for HARQ-ACK. The base station adopts another mechanism to ensure resource utilization. Alternatively, the UE may use PRBs of a PUCCH format X channel with greater PRB number and PRBs of PUSCH to perform uplink transmission. Subsequently, there are more available uplink resources, which is helpful to guarantee link performance. Alternatively, if PRB number needing to be used by a UE is power of 2, 3, and/or 5, when determining the PUCCH format X channel used for uplink transmission, firstly select a PUCCH format X channel, PRB number thereof and PRB number of PUSCH channel achieve the power of 2, 3, and/or 5, and select to occupy a PUCCH format X channel with greater PRB number. When (N_PUSCH+M) does not meet foregoing power condition, try to reduce PRB number, that is, N_PUSCH+M-1, N_PUSCH+M-2, and so on. Firstly adopt the maximum value of PRB number, which is the power of 2, 3, and/or 5. Record such PRB number with m. The method of selecting m PRBs from (N_PUSCH+M) PRBs to transmit UCI and uplink data is not limited by the present disclosure.

Alternatively, in a case where a PUCCH format X channel has been respectively configured for HARQ-ACK and P-CSI, adopt PRB of these two PUCCH format X channels together with PRB of PUSCH to perform uplink transmission. Here, the UE may adopt all (N1+N2) PRBs of these two PUCCH format X channels to perform the uplink transmission. Alternatively, the UE may use some PRBs of all (N1+N2) PRBs of these two PUCCH format X channels to perform the uplink transmission. In some cases, the allocated PRBs of PUCCH format X channel used for transmitting HARQ-ACK and semi-statically configured PRBs of PUCCH format X channel used for transmitting P-CSI may be partially overlapped, or completely overlapped. That is, actual PRB number of PUCCH format X channel used for transmitting UCI and uplink data may be greater than or equal to min(N1, N2), however is less than (N1+N2). Thus, some or all the PRBs of PUCCH format X channel available for transmitting UCI and uplink data may be used for transmitting the UCI and uplink data. The method of selecting some PRBs from all the available PRBs is not limited by the present disclosure. For example, record PRB number used for uplink transmission with N. N is less than or equal to the maximum value of available PRB number. The UE transmits UCI and uplink data with uplink resources of (N_PUSCH+N) PRBs. When the PRB number used by the UE is power of 2, 3, and/or 5, and (N_PUSCH+N) does not meet foregoing power condition, try to reduce PRB number, e.g., N_PUSCH+N-1, N_PUSCH+N-2, and so on. Firstly adopt the maximum value of PRB number, which is the power of 2, 3, and/or 5. Record the PRB number with n. The method for selecting n PRBs from N PRBs to transmit UCI is not limited by the present disclosure.

The PRB number of PUSCH may be not limited by the foregoing method. For example, as long as (N_PUSCH+k) is power of 2, 3, and/or 5, due to existence of PUCCH format X channel, k represents increasable PRB number used for uplink transmission. And then, the UE occupies (N_PUSCH+k) PRBs to transmit UCI and uplink data. Alternatively, the foregoing method may be applied, when PRB number of PUSCH is less than threshold NT. NT may be configured with high level signalling, or may be predefined, e.g., NT=5. The reason is as follows. When PRB number of PUSCH is less, transmission of too much UCI in PUSCH will have an impact on transmission performance of uplink data. By increasing PRB number, influence on uplink data transmission may be reduced.

By adopting the method of simultaneously transmitting UCI and uplink data within foregoing one subframe, although PRB number of a PUSCH channel allocated by uplink grant signalling for transmitting uplink data is N_PUSCH, the UE actually transmits uplink data and UCI in a PUSCH channel with (N_PUSCH+k) PRBs. Due to the existence of PUCCH format X channel, k represents increasable PRB number used for uplink transmission. The present disclosure further puts forward the following technical method. N_PUSCH is not limited to be power of 2, 3, and/or, 5. Instead, (N_PUSCH+k) is limited to be power of 2, 3, and/or, 5.

Current LTE system only supports the following case, where PUSCH channel includes two PRB clusters at most. PRBs within one cluster are continuous. PRBs among different clusters are not continuous. When such requirements need to be met, foregoing method of transmitting UCI and uplink data by using PRBs of PUCCH format X channel and PRBs of PUSCH will be limited. Record the allowed maximum value of PRB cluster number with q, PRB cluster number used by a UE to transmit UCI and uplink data is less than or equal to q, in which q may be consistent with PRB cluster number of PUSCH used for transmitting uplink data, e.g., q=2. Alternatively, when simultaneously transmitting UCI and uplink data, a greater q may be permitted, e.g., q=3. Here, firstly adopt PRBs of PUSCH channel to transmit UCI and uplink data. That is, suppose PRB cluster number of PUSCH used for transmitting uplink data is q, only when PRB of PUCCH format X channel is adjacent to PRB of foregoing PUSCH, PRB of PUCCH format X channel and PRB of PUSCH may be simultaneously utilized; otherwise, PRB of PUCCH format X channel and PRB of PUSCH may be simultaneously utilized, and it is necessary to guarantee that PRB cluster number actually occupied by the UE is less than or equal to q. Alternatively, when PRB cluster number constituted by PRB of PUSCH and PRB of PUCCH format X channel is less than or equal to q, all the PRBs of PUSCH and PRB of PUCCH format X channel may be used for transmitting UCI and uplink data; otherwise, transmit UCI and uplink data by using PRB of q PRB clusters with maximum PRB number. The foregoing method for simultaneously transmitting UCI and uplink data within one subframe is also applicable to a PUSCH, which has been allocated for A-CSI, e.g., a case where uplink data transmission does not exist actually. Here, the UCI may only include HARQ-ACK, or only include P-CSI, or simultaneously include HARQ-ACK and P-CSI. Here, based on the foregoing method, record PRB number of PUSCH channel allocated for A-CSI with N_PUSCH. And then, the UCI and uplink data may be transmitted with (N_PUSCH+k) PRBs. K represents increasable PRB number used for uplink transmission, due to existence of PUCCH format X channel.

Embodiment 5

Based on current LTE specification, when there is no PUCCH transmission, transmission power of PUSCH channel in subframe i of cell c may be determined by the following formula:

[dBm] (1)

Definition of each parameter in formula (1) may refer to section 5.1.1.1 of 36.212 in 3GPP specification, which has been briefly introduced as follows.

represents maximum transmission power of cell c configured for a UE.

represents PRB number occupied by PUSCH.

represents a power offset value configured with high level signaling.

represents a link loss.

represents all or some of control compensation link loss.

represents an accumulated value of closed loop control power.

represents a parameter related with modulation and coding scheme (MCS) of uplink transmission. Specifically speaking, when K_S=0,

. When K_S=1.25,

. In a case where only A-CSI is transmitted without transmitting uplink data,

,

. In a case where uplink data has been transmitted,

,

. C represents CB number divided from TB.

represents bit number of

CB.

represents total number of REs included by a PUSCH channel.

Suppose a UE needs to schedule uplink data within one subframe, or A-CSI has been triggered when there is no uplink data, correspondingly, a base station allocates one PUSCH channel for a UE. In addition, suppose the UE also needs to feed back UCI within the subframe, the UCI here may only include HARQ-ACK, or only include P-CSI, or simultaneously include HARQ-ACK and P-CSI, the base station correspondingly allocates a PUCCH format X channel for the UE. Record PRB number N_PUSCH of the allocated PUSCH channel. And then, based on the method provided by Embodiment 4, transmit foregoing UCI, uplink data, and/or, A-CSI in a PUSCH channel constituted by (N_PUSCH+k) PRBs. K represents increasable PRB number used for uplink transmission, due to the existence of PUCCH format X channel. More particularly, k may be 0. That is, only transmit UCI and uplink data in PUSCH.

Corresponding to foregoing method, process uplink power control based on increased total number of PRB, that is, Next=N’_PUSCH+k. N’_PUSCH represents PRB number of an allocated PUSCH channel. In a case where uplink data has been scheduled, N’_PUSCH represents PRB number N_PUSCH used for uplink data transmission, which has been allocated within current subframe. Alternatively, N’_PUSCH represents PRB number, which has been allocated during initial transmission of one TB. When A-CSI has been triggered without uplink data, N’_PUSCH represents PRB number N_PUSCH used for uplink data transmission, which is allocated within current subframe.

Based on formula (1), configure total PRB number N_ext with

. Based on formula (1), when K_S=0, parameter

. When K_Sis not equal to 0,

, e.g., K_S=1.25. When K_S is not equal to 0, a method for processing parameter

will be described in the following.

A first method for processing

is as follows. When uplink data exists,

. BPRE is calculated based on bit number of current data and total PRB number N_ext. That is,

,

. When A-CSI has been triggered without uplink data,

. BPRE may be calculated based on bit number

of CQI/PMI of A-CSI and total PRB number N_ext, that is,

,

.

represents calculated bit number of CQI/PMI for A-CSI, when RI=1. Alternatively, when A-CSI has been triggered without uplink data, process

based on total bit number of UCI, total PRB number N_ext and

of one UCI type, e.g.,

of UCI with the highest reliability requirements. BPRE may be calculated based on total bit number

of UCI and total PRB number . That is,

,

.

A second method for processing

is as follows. When uplink data exists,

. BPRE may be calculated based on bit number of current data and PRB number N’_PUSCH, which is allocated for uplink data transmission.

,

. When A-CSI has been triggered without uplink data,

. BPRE is calculated based on bit number

of CQI/PMI of A-CSI and PRB number

, which is allocated for uplink data transmission.

,

. Alternatively, when A-CSI has been triggered without uplink data, process

based on total bit number of UCI, total PRB number N’_PUSCH of PUSCH, and

of one UCI type, e.g.,

of UCI and total PRB number N’_PUSCH of PUSCH, that is,

,

.

represents calculated bit number of CQI/PMI for A-CSI, when RI=1.

A third method for processing

is as follows. When uplink data exists,

,

. N_tot may represent sum of bit number

of UCI and bit number

of uplink data. That is,

. When feeding back various kinds of UCI,

represents total bit number of various kinds of UCI. Alternatively,

may represent total bit number of equivalent data for UCI and uplink data. For one UCI type, record bit number thereof with

. Record

based on parameter

of such UCI type, and obtain bit number

of equivalent data thereof, thus,

. Foregoing UCI type may refer to HARQ-ACK, CQI/PMI or RI. Alternatively, for P-CSI, CQI/PMI and RI may not be differentiated, which refers to the total bit number of P-CSI. N_RE is also calculated based on total PRB number N_ext, or is calculated based on allocated PRB number N’_PUSCH used for uplink data transmission.

When A-CSI has been triggered without uplink data,

,

.

may refer to sum of bit number

of UCI and bit number

of CQI/PMI for A-CSI, that is,

. When feeding back various UCI types,

represents total bit number of various UCI types. Alternatively,

represents total bit number of equivalent CQI, which is about bit number

of CQI/PMI for A-CSI and UCI. For one UCI type, record bit number thereof with

. Record

based on parameter

of such UCI type. And obtain bit number

of equivalent data thereof. Subsequently,

. Foregoing UCI type may refer to HARQ-ACK, CQI/PMI or RI coming from P-CSI. Alternatively, for P-CSI, CQI/PMI and RI may be not differentiated, instead total bit number of P-CSI is referred to. N_RE may be calculated based on total PRB number N_ext, or may be calculated based on allocated PRB number N’_PUSCH used for uplink data transmission.

represents calculated bit number of CQI/PMI for A-CSI, when RI=1.

In foregoing three methods,

may represent SCFDMA symbol number of uplink resources used for uplink data transmission, which is allocated within current subframe. That is,

.

represents SCFDMA symbol number within one time slot.

represents SCFDMA symbol number used for sounding reference signal (SRS) transmission within current subframe. Alternatively,

may represent SCFDMA symbol number of uplink resources, which are allocated during initial transmission of the same TB. That is,

.

represents SCFDMA symbol number used for SRS transmission in an uplink subframe, in which the uplink subframe is associated with initial transmission of the same TB.

In addition, the method for processing

discussed above is only applied to a scene, where K_S is not equal to 0. If uplink transmission mode 2 is configured, that is, uplink multiple-input multiple-output (MIMO) transmission is supported, when current standard limits that K_S=0, uplink transmission power cannot be controlled by using

. Particularly for a case where A-CSI has been triggered without uplink data, a UE actually adopts a single layer transmission, however, uplink transmission power still cannot be controlled with

. Under uplink transmission mode 2, to better control uplink power in a case where A-CSI has been triggered without uplink data, the present disclosure puts forward to process

and uplink power control, based on K_S≠0, e.g., a method adopted when K_S=1.25. For other cases, still adopt a method applicable when K_S = 0 to process uplink power control.

Besides, for a case where uplink data exists, and another case where A-CSI has been triggered without uplink data, respectively configure parameter

. Subsequently, adjust uplink power control, based on performance difference in the following two cases, e.g., uplink data has been transmitted, and only A-CSI has been transmitted.

When processing PUCCH power control based on foregoing power control method of PUSCH, e.g., in a case where PUCCH is based on PUSCH structure, respectively configure parameter K_Sfor power control of uplink data transmission and power control of PUCCH. Subsequently, when processing power control of uplink data transmission based on K_S=0, configure to process power control of PUCCH based on K_S>0, e.g., 1.25. Alternatively, predefine to process power control of PUCCH fixedly based on K_S>0, e.g., K_S=1.25, in which K_Srepresents a power control parameter independent of uplink data transmission,

Embodiment 6

Various kinds of UCI may need to be transmitted in an uplink subframe. In an uplink channel, record modulation symbol number NRE. For UCI type k, record bit number N_k. Correspondingly, parameter

is

.

Foregoing uplink channel may be a PUCCH format X channel, so as to feed back HARQ-ACK, and/or, P-CSI. Alternatively, in a case where A-CSI has been triggered without uplink data, the foregoing uplink channel may be a PUSCH channel. Alternatively, when adopting the method of Embodiment 4, foregoing uplink channel refers to a PRB set of multiple PUCCH format X channels. Alternatively, foregoing uplink channel refers to a PRB set of PUSCH channel and PUCCH format X channel.

Generally, foregoing UCI type means to differentiate CQI/PMI, RI and HARQ-ACK, e.g., which are recorded with UCI type k in sequence, k=0, 1, 2. Total number K of UCI type is 3. For such three UCI types, respectively encode and calculate mapped RE number. Alternatively, divide UCI into k categories, in which k=2. For such two UCI types, respectively encode and calculate mapped RE number. For example, record CQI/PMI with UCI type 0. Jointly encode HARQ-ACK, SR and RI, and record with UCI type 1. Alternatively, record P-CSI with UCI type 0, and record HARQ-ACK with UCI type 1 without differentiating RI and CQI/PMI.

Reliability requirements of different types of UCI are generally different. Relative reliability may be controlled with parameter

. In general case, reliability requirements of CQI/PMI are lower, compared with that of HARQ-ACK and RI. When allocating RE number respectively occupied by a different UCI type, calculate RE number occupied by UCI type k, based on bit number and parameter

of UCI type k. For example, based on the method of Embodiment 3, when there are two UCI types, allocate modulation symbol number

for UCI type 0. The foregoing formula provides rounded down, since UCI type 0 represents UCI type with lower reliability requirements. However, encoding rate of UCI type 0 may be very high, even greater than 1, which is resulted from the calculated modulation symbol number Q'. Subsequently, UCI type 0 cannot be transmitted. Based on the method of Embodiment 4, there are sufficient REs to carry out uplink transmission, when there are multiple PUCCH format X channels, or when simultaneously using PRBs of PUSCH channel and PUCCH format X channel.

The present disclosure puts forward the following method. When needing to feed back various kinds of UCI within one subframe, for k^th UCI type, k=0, 1,...K-1, pre-allocate a certain number of modulation symbols, which is recorded with M_k. M_k may be determined based on lowest performance requirements of UCI type k. For example, the maximum encoding rate R_k is available for UCI type k.

. R_k of a different UCI type may be the same or may be different. R_k may be predefined, or may be configured with high level signaling. N_CRC represents cyclic redundancy check (CRC) bit number added to UCI type k. Q_m represents a modulation order. More particularly, the proportion relationship among maximum encoding rate R_k of each UCI type k may be the same as the proportion relationship, which is among parameter

thereof.

When sum

of modulation symbol number pre-allocated for K kinds of UCI is equal to the total number N_RE of modulation symbols of uplink channel, pre-allocated modulation symbol number is modulation symbol number allocated for each UCI type.

When

, that is, RE number of an uplink channel is not sufficient to simultaneously transmit HARQ-ACK and CSI. At this time, discard some or all the CSI, re-calculate a new M_k, until

. The method of discarding some or all the CSI is not limited by the present disclosure.

When

, that is, after calculating needed modulation symbol number based on the minimum performance requirements, there are still

modulation symbols left. The remaining modulation symbols may be used for improving performance of one or more UCI type. Record modulation symbol number

allocated for UCI type k from the remaining modulation symbols. Subsequently, the total number of modulation symbols occupied by UCI type k is

.

When

, all the foregoing remaining modulation symbols may be used for transmitting UCI type with highest transmission reliability requirements, such as HARQ-ACK. Alternatively, the foregoing remaining modulation symbols may be allocated equally to each UCI type, which is to be fed back within current subframe. Alternatively, the foregoing remaining modulation symbols may be allocated, based on proportion of bit number of each UCI type. For example, modulation symbol number allocated for UCI type 0 in foregoing remaining modulation symbols is

.

Alternatively, when

, the foregoing remaining modulation symbols may be allocated, based on bit number of UCI type k and foregoing maximum encoding rate R_k. That is, allocate foregoing remaining modulation symbols for each UCI type, based on proportion of foregoing maximum encoding rate R_k. For example, modulation symbol number allocated for UCI type 0 from foregoing remaining modulation symbols is

. By adopting this method, it may be guaranteed that proportion of actual encoding rate of each UCI type is the same as, or is close to the proportion of maximum encoding rate R_k thereof. In the foregoing method, which allocates foregoing remaining modulation symbols based on bit number of UCI type k and maximum encoding rate Rk, calculate the total number of modulation symbols allocated for UCI type k, based on the total number of modulation symbols. For example, the total number N_RE of modulation symbols allocated for UCI type 0 is

.

Alternatively, when

, allocate foregoing remaining modulation symbols, based on bit number of UCI type k and parameter

thereof. That is, allocate foregoing remaining modulation symbols for each UCI type, based on the proportion of parameter

. For example, the modulation symbol number allocated for UCI type 0 in foregoing remaining modulation symbols is

.

Alternatively, in a case

, when guaranteeing that minimum modulation symbol number has been allocated for each UCI type, so as to meet lowest performance requirements thereof, try to control proportion of modulation symbol number allocated for each UCI type, based on proportion of parameter

. Specifically speaking, calculate modulation symbol number Q'_k of UCI type k , based on total number N_RE of modulation symbols, bit number of UCI type k and parameter

thereof. That is, divide all the modulation symbols based on the proportion of parameter

. For example, modulation symbol number of UCI type 0 is . When the minimum performance requirements of each UCI type is met, that is, , k=0,1,...K-1, the total number of modulation symbols allocated for UCI type k is Q_k=Q''_k; otherwise, for UCI type p, the minimum performance requirements thereof cannot be met, that is, Q''_p<M_p , enable allocated total number of modulation symbols to be M_p. Subsequently, record the total number

of modulation symbols allocated for each UCI type p, the minimum performance requirements thereof cannot be met. Allocate the remaining

modulation symbols, based on bit number of remaining UCI types and parameter

. Continuously determine whether the minimum performance requirements of each UCI type can be met, by using modulation symbol number allocated for each UCI type, and process correspondingly. More particularly, suppose UCI fed back within one subframe is divided into two types, bit number and parameter thereof are respectively recorded with N_k and

. Record the minimum modulation symbol number needed to be allocated for two UCI types is respectively M_k, k=0, 1, and then, the modulation symbol number allocated for UCI type 0 is

. Correspondingly, the modulation symbol number allocated for UCI type 1 is Q₁=N_RE-Q₀. More particularly, suppose UCI fed back within one subframe is divided into three types, bit number and parameter

are respectively recorded with N_k and

. Record the minimum number of modulation symbols needed to be allocated for three UCI types with M_k, k=0,1,2. When allocating modulation symbols, performances of a UCI type with greater index k value may be improved firstly. For example, reliability requirements of HARQ-ACK are generally higher than that of RI and CQI/PMI. Meanwhile, reliability requirements of CQI/PMI are the lowest. UCI with k=0,1,2 respectively corresponds to CQI/PMI, RI and HARQ-ACK. However, another priority sequence of CQI/PMI, RI and HARQ-ACK is not limited in the present disclosure. For example, the modulation symbol number allocated for UCI type 2 may be as follows,

Correspondingly, the modulation symbol number allocated for UCI type 1 is

Correspondingly, the modulation symbol number allocated for UCI type 0 is

.

The present disclosure puts forward the following method. When needing to feed back various UCI types within one subframe, firstly determine whether support to transmit all the UCI, based on total bit number of UCI and total RE number N_RE of uplink channel. For example, calculate encoding rate

based on total bit number of UCI. When the encoding rate has exceeded a certain threshold R_limit, discard some or all the CSI. Re-calculate a new encoding rate, until the obtained encoding rate is less than R_limit. R_limit may be predefined, or may be configured with high level signaling. The method of discarding some or all the CSI is not limited in the present disclosure. Subsequently, for k^th UCI type, k=0,1,...K-1, pre-allocate a certain number of modulation symbols, which is recorded with Mk. Mk may represent modulation symbol number, which is calculated for UCI type k based on encoding rate threshold R_limit.

. When sum

of modulation symbol number pre-allocated for K UCI types is equal to the total number N_RE of modulation symbols of an uplink channel, the pre-allocated modulation symbol number is modulation symbol number allocated for each UCI type. When

, for the remaining

modulation symbols, calculate RE number Q'_k occupied by UCI type k, based on bit number of UCI type k and parameter

thereof. Subsequently, the total number of modulation symbols occupied by UCI type k is Q'_k+M_k. For example, the modulation symbol number allocated for UCI type 0 in foregoing remaining modulation symbols is

. Alternatively, in a case where

, when guaranteeing that the minimum performance requirements of each UCI type are met, by using modulation symbol number allocated for each UCI type, try to control proportion of modulation symbol number allocated for each UCI type, based on proportion of parameter

. Specifically speaking, calculate modulation symbol number Q''_k of UCI type k, based on total number N_RE of modulation symbols, bit number of UCI type k and parameter

thereof. That is, divide all the N_RE modulation symbols, based on proportion of parameter

. For example, modulation symbol number allocated for UCI type 0 is

. When the minimum performance requirements of each UCI type is met, that is,

, k=0,1,...K-1. The total number of modulation symbols allocated for UCI type k is

; otherwise, for a UCI type p, the minimum performance requirements thereof cannot be met,

. That is,

. Enable the total number of modulation symbols allocated for UCI type p to be M_p. Subsequently, record the total number

of modulation symbols allocated for each UCI type p, in which the minimum performance requirements of each UCI type p are not met. Allocate the remaining

modulation symbols, based on bit number of remaining UCI types and parameter

. And continuously determine whether modulation symbol number allocated for each UCI type has met the minimum performance requirements thereof, and process correspondingly. Suppose UCI fed back within one subframe is divided into two types, bit number and parameter

are respectively recorded with N_k and

. Record the minimum modulation symbol number needed to be allocated for these two UCI types with M_k, k=0,1. Subsequently, the modulation symbol number allocated for UCI type 0 may be

.

Correspondingly, the modulation symbol number allocated for UCI type 1 is

. Suppose the UCI fed back within one subframe is divided into three types, bit number and parameter thereof are respectively recorded with N_k and

. Record the minimum modulation symbol number needed to be allocated for three UCI types with M_k, k=0,1,2. When allocating the modulation symbols, firstly improve performances of a UCI type with a greater index k value. For example, reliability requirements of HARQ-ACK are generally higher than that of RI and CQI/PMI. Reliability requirements of the CQI/PMI are the lowest. Enable UCI with k=0,1,2 to respectively correspond to CQI/PMI, RI and HARQ-ACK. However, another priority sequence of CQI/PMI, RI and HARQ-ACK is not limited by the present disclosure. For example, the modulation symbol number allocated for UCI type 2 may be

.

Correspondingly, the modulation symbol number allocated for UCI type 1 may be

. Correspondingly, the modulation symbol number allocated for UCI type 0 is

.

When a UE transmits HARQ-ACK and P-CSI, or HARQ-ACK and A-CSI, suppose the uplink channel thereof is a PRB set of multiple PUCCH format X channels, or, the uplink channel thereof is a PRB set of PUSCH channel and PUCCH format X channel, since there are sufficient REs used for uplink transmission, whether the total modulation symbol number has exceeded the modulation symbol number calculated based on the minimum performance requirements may be not checked. That is, when

, it is not necessary to perform processing. When

is equal to, or less than N_RE, further processing is necessary.

Corresponding to the method respectively illustrated with FIG.2-FIG.5, the present disclosure respectively provides a corresponding device, which will be described in the following.

FIG.11 is a schematic diagram illustrating structure of a device, which multiplexes UCI in an uplink channel, in accordance with an example of the present disclosure. The device illustrated with FIG.11 includes a classification processing module and a mapping module.

The classification processing module is to divide UCI in different categories, and respectively perform encoding, rate matching and modulation on UCI in a different category.

The mapping module is to respectively map a UCI of a different category to an uplink channel.

FIG.12 is a schematic diagram illustrating structure of a device, which multiplexes A-CSI and P-CSI in an uplink channel, in accordance with an example of the present disclosure. The device shown in FIG.12 includes a feedback information determining module and a feeding back module.

The feedback information determining module is to determine P-CSI, which needs to be fed back with A-CSI in current subframe.

The feeding back module is to perform encoding, rate matching and modulation on A-CSI and P-CSI, and map to a PUSCH to be transmitted.

FIG.13 is a schematic diagram illustrating structure of a device, which is to determine modulation symbol number occupied by UCI, in accordance with an example of the present disclosure. The device illustrated with FIG.13 includes an encoding module and a calculating module.

The encoding module is to encode UCI, which is to be fed back in current subframe.

The calculating module is to determine

corresponding to UCI to be encoded jointly, in which

is to calculate modulation symbol number.

FIG.14 is a schematic diagram illustrating structure of a device, which determines PRB resources used for uplink transmission, in accordance with an example of the present disclosure. The device illustrated with FIG.14 includes a resource determining module and a transmitting module.

The resource determining module is to determine occupied uplink PRB resources, based on an uplink channel allocated within current subframe.

The transmitting module is to map uplink information within current subframe to a PUSCH channel to be transmitted, in which the PUSCH channel corresponds to the uplink PRB resources.

The foregoing is only preferred embodiments of the present disclosure, which is not used for limiting the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present disclosure, should be covered by the protection scope of the present disclosure.

Claims

A method for multiplexing uplink control information (UCI) in an uplink channel, comprising:

dividing, by a user equipment (UE), the UCI into different categories, and respectively performing encoding, rate matching and modulation on the UCI of a different category;

respectively mapping, by the UE, the UCI of a different category to the uplink channel.
The method according to claim 1, wherein performing by the UE the encoding on the UCI of a different category comprises:

taking hybrid Automatic Repeat request-Acknowledge (HARQ-ACK), scheduling request (SR) and first type channel state information (CSI) as first type UCI;

jointly encoding the first type UCI;

taking second type CSI as second type UCI;

jointly encoding the second type UCI;

wherein reliability requirements of the first type CSI are higher than that of the second type CSI, reliability requirements of the first type UCI are higher than that of the second type UCI.
The method according to claim 2, further comprising:

when a UE needs to feed back periodic channel state information (P-CSI) of N cells within one subframe, wherein respectively performing by the UE the encoding on the UCI of a different category comprises:

taking the P-CSI of the N cells in a rank indication (RI) category as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in a channel quality indicator (CQI)/precoding matrix indicator (PMI) category as the second type UCI, and jointly encoding the second type UCI;

when the UE needs to feed back the P-CSI and aperiodic channel state information (A-CSI) of N cells within one subframe, respectively performing by the UE the encoding on the UCI of a different category comprises:

taking the P-CSI of the N cells in RI category, and/or, the A-CSI of each cell triggered currently in RI category as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in CQI/PMI category, and/or, the A-CSI of each cell triggered currently in CQI/PMI category as the second type UCI, and jointly encoding the second type UCI;

when the UE needs to feed back the HARQ-ACK and P-CSI of N cells within one subframe, respectively performing by the UE the encoding on the UCI of a different category comprises:

taking the P-CSI of the N cells in RI category and the HARQ-ACK as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in CQI/PMI category as the second type UCI, and jointly encoding the second type UCI;

when the UE needs to feed back the HARQ-ACK, P-CSI and A-CSI of N cells within one subframe, respectively performing by the UE the encoding on the UCI of a different category comprises:

taking the P-CSI of the N cells in RI category, the A-CSI of each cell triggered currently in RI category, and the HARQ-ACK as the first type UCI, and jointly encoding the first type UCI;

taking the P-CSI of the N cells in CQI/PMI category, the A-CSI of each cell triggered currently in CQI/PMI category as the second type UCI, and jointly encoding the second type UCI; wherein N is an integer.
A method for multiplexing periodic channel state information (P-CSI) and aperiodic channel state information (A-CSI) in an uplink channel, comprising:

determining, by a user equipment (UE), the P-CSI needing to be fed back with the A-CSI in current subframe;

performing, by the UE, encoding, rate matching and modulation on the A-CSI and P-CSI, and mapping to a physical uplink shared channel (PUSCH) to be transmitted.
The method according to claim 4, wherein the P-CSI needing to be fed back with the A-CSI comprises:

all the P-CSI configured for the current subframe; or, the P-CSI of a primary cell (Pcell); or, the P-CSI of a cell configured with a physical uplink control channel (PUCCH); or, the P-CSI in RI category; or, the P-CSI, priority level thereof is higher than a set threshold; or, the P-CSI with a different CSI process ID, a different cell ID and/or a different CSI subframe set index, compared with the A-CSI; or, the P-CSI determining to be fed back with the A-CSI, based on configuration of high level signaling;

or, first part P-CSI of multiple P-CSI needing to be fed back within the current subframe, or a subset of the first part P-CSI, wherein the first part P-CSI is determined by a method for feeding back the P-CSI in a PUCCH.
The method according to claim 4, wherein number of CSI processes of the P-CSI and A-CSI fed back within one subframe is less than or equal to N, N is the maximum number of CSI processes of the A-CSI fed back within one subframe, which is supported by the UE;

or, the number of CSI processes of the P-CSI and A-CSI fed back within one subframe is less than, or equal to M, wherein M is the maximum number of CSI processes simultaneously fed back by the UE within one subframe, which is configured with high level signaling, and M>N.
A method for determining a modulation symbol number occupied by uplink control information (UCI), comprising:

encoding, by a user equipment (UE), the UCI to be fed back in current subframe;

determining, by the UE, a parameter
corresponding to the UCI to be jointly encoded, and determining modulation symbol number allocated to each UCI type, wherein
is to calculate the modulation symbol number,.
The method according to claim 7, wherein performing by the UE the encoding on the UCI to be fed back in current subframe comprises:

jointly encoding, by the UE, all the UCI to be fed back in current subframe;

wherein determining by the UE the parameter
corresponding to the UCI to be jointly encoded, in which
is to calculate the modulation symbol number, comprises:

when all the UCI belongs to one UCI type, using
corresponding to the UCI type to calculate the modulation symbol number;

when the UCI to be fed back within current subframe comprises UCI of a different type, using the maximum value of
corresponding to the UCI of a different type to calculate the modulation symbol number.
The method according to claim 7, wherein determining by the UE the parameter
corresponding to the UCI to be jointly encoded, in which parameter
is to calculate the modulation symbol number, comprises:

for a physical uplink control channel (PUCCH) format X channel, re-using parameters
,
and
, which are used for determining resource element (RE) number of the UCI in a physical uplink shared channel (PUSCH); or,

for the PUCCH format X channel, configuring new parameters
,
and
; or,

for the PUCCH format X channel, configuring parameter
, which is applied to the following cases, where only hybrid Automatic Repeat request-Acknowledge (HARQ-ACK) is transmitted, or only rank indication (RI) is transmitted, or the HARQ-ACK and RI are simultaneously transmitted; or,

for different PUCCH channel formats of one UCI type, respectively configuring different parameter
to control resource element (RE) number occupied by UCI transmission.
A method for determining an uplink physical resource block (PRB) used for an uplink transmission, comprising:

determining, by a user equipment (UE), the uplink PRB occupied by an uplink channel, which is allocated within a current subframe;

mapping, by the UE, uplink information within the current subframe to a physical uplink shared channel (PUSCH) to be transmitted, wherein the PUSCH corresponds to the uplink PRB.
The method according to claim 10, further comprising:

when the uplink information within the current subframe comprises hybrid Automatic Repeat request-Acknowledge (HARQ-ACK) and periodic channel state information (P-CSI), in which the HARQ-ACK and the P-CSI are respectively allocated with PRB of a corresponding physical uplink control channel (PUCCH) format X, wherein mapping by the UE the uplink information within the current subframe to the PUSCH to be transmitted, in which the PUSCH corresponds to the uplink PRB, comprises:

transmitting the HARQ-ACK and the P-CSI in one of the two PUCCH format X channels; or,

transmitting the HARQ-ACK and the P-CSI with the PRB of the two PUCCH format X channels.
The method according to claim 10, wherein when the uplink information within the current subframe comprises uplink control information (UCI) and uplink data, a PRB channel of a corresponding PUCCH format X has been allocated for the UCI, the PRB of a corresponding PUSCH channel has been allocated for the uplink data, wherein mapping by the UE the uplink information within the current subframe to the PUSCH to be transmitted, in which the PUSCH corresponds to the uplink PRB, comprises:

utilizing the PRB of one PUCCH format X channel and the PRB of the PUSCH to transmit the UCI and the uplink data; or,

simultaneously utilizing the PRB of two PUCCH format X channels and the PRB of the PUSCH to transmit the UCI and the uplink data,

wherein number of the uplink PRB used for transmitting the UCI and the uplink data is a power of 2, 3, and/or 5, cluster number of the uplink PRB is less than a set threshold.
A method for determining an uplink transmission, comprising:

determining, by a user equipment (UE), uplink resources occupied by an uplink channel allocated within a current subframe; and

determining, by the UE, an uplink transmission power, based on a physical resource block (PRB) number of the uplink resources and uplink control information (UCI) needing to be fed back.
The method according to claim 13, wherein the PRB number is allocated for a physical uplink shared channel (PUSCH); or,

the PRB number is a sum of the PRB number allocated for the PUSCH and a PRB number allocated for a physical uplink control channel (PUCCH) format X.
The method according to claim 13, wherein a method for processing power offset
based on an uplink power control formula of the PUSCH, comprises:

when there is uplink data,
,
, wherein C represents a codeblock (CB) number divided from a transport block (TB), K_r represents a bit number of r^th CB; or,

when triggering aperiodic channel state information (A-CSI) without uplink data, processing power control based on a bit number of channel quality indicator (CQI)/precoding matrix indicator (PMI) of the A-CSI,
,
,
represents a bit number of the CQI/PMI for the A-CSI, which is calculated based on rank indication (RI)=1; or,

when triggering the A-CSI without uplink data, processing the power control based on a total bit number of the UCI,
, wherein
corresponds to one UCI type, and
represents the total bit number of the UCI, N_RE represents a resource element (RE) number used for the uplink transmission.