CN102026280A - Feedback method and equipment for channel state information - Google Patents

Abstract

The embodiment of the invention discloses a channel state information feedback method and device. The method includes: in the PUCCH, feeding back the channel state information of the main carrier unit, and feeding back the channel state information of the auxiliary carrier unit by means of difference quantization coding; in the PUSCH, according to multiple subcarriers in the main carrier unit The difference between the channel state information of the main carrier unit and the channel state information of the main carrier unit, the channel state information of multiple subcarriers in the main carrier unit is fed back by means of difference quantization coding; according to the channel state information of multiple subcarriers in the auxiliary carrier unit and The difference in channel state information of the auxiliary carrier unit is used to feed back the channel state information of multiple subcarriers in the auxiliary carrier unit by means of difference quantization and encoding. By using the present invention, bit overhead required in channel state information feedback of multiple carrier components is saved.

Description

Feedback method and device for channel state information

technical field

The invention relates to the communication field, in particular to a feedback method and equipment for channel state information.

Background technique

In the LTE-Advanced (Long Term Evolution-Advanced, hereinafter referred to as LTE-A) system, in order to support a wider system bandwidth than the LTE system, such as 100MHz, it is necessary to combine multiple carrier units (also known as component carriers) ) resources are aggregated and used. The specific aggregation methods include the following two types:

(1) Multiple continuous carrier components are aggregated to provide larger transmission bandwidth for LTE-A.

(2) Multiple discontinuous carrier components are aggregated to provide larger transmission bandwidth for LTE-A; discontinuous carrier aggregation has more aggregation flexibility.

However, in the existing LTE feedback scheme, only the feedback information of a single carrier component is considered, and how to reduce the overhead of transmitting the feedback information in the case of the increase of the feedback information overhead caused by the channel quality information feedback of multiple carrier components is not considered. method. The CQI (Channel Quality Indication, Channel Quality Indication) feedback scheme stipulated in the current LTE protocol is only applicable to the case of a single carrier unit. After using carrier aggregation technology, how to further reduce the overhead of feedback information on multiple carrier units is a problem in the prior art. Problems to be solved.

Contents of the invention

Embodiments of the present invention provide a channel state information feedback method and device, which are used to save bit overhead required in channel state information feedback of multiple carrier components.

Embodiments of the present invention provide a feedback method for channel state information, including:

In the physical uplink control channel PUCCH, the channel state information of the main carrier unit is fed back, and the channel state information of the auxiliary carrier unit is fed back by means of difference quantization coding;

In the physical uplink shared channel PUSCH, according to the difference between the channel state information of multiple subcarriers in the main carrier unit and the channel state information of the main carrier unit, the multiple The channel state information of subcarriers is fed back; according to the difference between the channel state information of multiple subcarriers in the auxiliary carrier unit and the channel state information of the auxiliary carrier unit, the channel state information in the auxiliary carrier unit is quantified and encoded by difference value quantization and coding. The channel state information of multiple subcarriers is fed back.

Wherein, the channel state information is represented by a modulation and coding format MCS level.

Wherein, the feeding back the channel state information of the secondary carrier unit by means of difference quantization coding includes:

When the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, the channel state information of the auxiliary carrier unit is fed back by using mixed feedback difference quantization coding, specifically:

Obtain the difference between the MCS level corresponding to the channel state information of the secondary carrier unit and the MCS level corresponding to the channel state information of the main carrier unit, and feed back the absolute value and positive or negative of the difference through bits of a specific length.

Wherein, the feeding back the channel state information of the secondary carrier unit by means of difference quantization coding includes:

When the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak, the channel state information of the auxiliary carrier unit is fed back by using mixed feedback difference quantization coding, specifically:

In one or more fixed special time slots, feed back the MCS level corresponding to the channel state information of the auxiliary carrier unit; in other transmission time slots, obtain the MCS level corresponding to the channel state information of the auxiliary carrier unit and the special For the difference value of the MCS level fed back by the time slot, the absolute value of the difference value and the positive and negative conditions are respectively fed back through bits of a specific length.

Wherein, according to the difference between the channel state information of the multiple subcarriers in the main carrier unit and the channel state information of the main carrier unit, the channels of the multiple subcarriers in the main carrier unit are analyzed by means of difference quantization coding. Status information for feedback, including:

According to the MCS level corresponding to the channel state information of the main carrier unit at the previous time and the MCS level corresponding to the channel state information of multiple subcarriers at the current time, the difference between the MCS level of each subcarrier at the current time and the MCS level of the main carrier unit is obtained , feeding back the absolute value of the difference and the positive and negative conditions respectively through bits of a specific length;

According to the difference between the channel state information of the multiple subcarriers in the secondary carrier unit and the channel state information of the secondary carrier unit, the channel state information of the multiple subcarriers in the secondary carrier unit is calculated by means of difference quantization and coding Give feedback, including:

According to the MCS level corresponding to the channel state information of the auxiliary carrier unit at the previous moment and the MCS level corresponding to the channel state information of multiple subcarriers at the current moment, the difference between the MCS level of each subcarrier at the current moment and the MCS level of the auxiliary carrier unit is obtained , feeding back the absolute value of the difference and the positive and negative conditions respectively through bits of a specific length.

Wherein, said feeding back the channel state information of the main carrier unit includes:

In the PUCCH, the channel state information of the main carrier component is fed back through fixed-length coding or difference quantization coding.

Wherein, in the PUCCH, feeding back the channel state information of the main carrier unit by means of difference quantization coding includes:

In one or more fixed special time slots, feed back the MCS level corresponding to the channel state information of the main carrier unit; in other transmission time slots, obtain the MCS level corresponding to the channel state information of the main carrier unit and the special For the difference value of the MCS level fed back by the time slot, the absolute value of the difference value and the positive and negative conditions are respectively fed back through bits of a specific length.

Embodiments of the present invention also provide a method for acquiring channel state information, including:

In the physical uplink control channel PUCCH, the channel state information of the main carrier unit is obtained according to the channel state information of the main carrier unit fed back; the auxiliary carrier unit is obtained according to the channel state information of the auxiliary carrier unit fed back by means of difference quantization coding channel state information;

In the physical uplink shared channel PUSCH, according to the channel state information of the main carrier unit and the channel state information of the multiple subcarriers in the main carrier unit fed back by means of difference quantization coding, the multiple subcarriers in the main carrier unit are obtained The channel state information of the carrier; according to the channel state information of the auxiliary carrier unit and the channel state information of the multiple subcarriers in the auxiliary carrier unit fed back by means of difference quantization and coding, obtain the information of the multiple subcarriers in the auxiliary carrier unit Channel state information.

Wherein, the channel state information is represented by a modulation and coding format MCS level.

Wherein, the acquisition of the channel state information of the auxiliary carrier unit according to the channel state information of the auxiliary carrier unit fed back by means of difference quantization and encoding includes:

When the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, according to the MCS level corresponding to the channel state information of the main carrier unit and the MCS level corresponding to the fed back channel state information of the auxiliary carrier unit and the channel state of the main carrier unit The absolute value of the difference of the MCS level corresponding to the information and the positive or negative status are used to obtain the channel state information of the secondary carrier unit.

Wherein, the acquisition of the channel state information of the auxiliary carrier unit according to the channel state information of the auxiliary carrier unit fed back by means of difference quantization and encoding includes:

When the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak, obtain the MCS level corresponding to the channel state information of the auxiliary carrier unit fed back in one or more fixed special time slots; in other transmission time slots, obtain The absolute value of the difference between the MCS level corresponding to the channel state information of the secondary carrier unit fed back and the MCS level fed back by the special time slot and the positive and negative conditions are used to obtain the channel state information of the secondary carrier unit.

Wherein, the channel state of multiple subcarriers in the main carrier unit is obtained according to the channel state information of the main carrier unit and the channel state information of multiple subcarriers in the main carrier unit fed back by means of difference quantization coding information, including:

According to the MCS level corresponding to the channel state information of the main carrier unit at the previous moment, and the absolute value of the difference between the MCS level of each subcarrier and the MCS level of the main carrier unit at the current time fed back, and the positive and negative conditions, the current time is obtained. Channel state information of multiple subcarriers in the main carrier unit;

Acquiring the channel state information of multiple subcarriers in the secondary carrier unit according to the channel state information of the secondary carrier unit and the channel state information of multiple subcarriers in the secondary carrier unit fed back by means of difference quantization and coding, include:

According to the MCS level corresponding to the channel state information of the auxiliary carrier unit at the previous moment, and the absolute value of the difference between the MCS level of each subcarrier and the MCS level of the auxiliary carrier unit and the positive and negative status of the feedback at the current time, the current time is obtained. Channel state information of multiple subcarriers in the secondary carrier unit.

Wherein, the acquisition of the channel state information of the main carrier unit according to the fed back channel state information of the main carrier unit includes:

In the PUCCH, the channel state information of the main carrier unit is obtained according to the channel state information of the main carrier unit fed back through fixed-length coding or difference quantization coding.

Wherein, in the PUCCH, obtaining the channel state information of the main carrier unit according to the channel state information of the main carrier unit fed back through fixed-length coding or through difference quantization coding includes:

Obtain the MCS level corresponding to the channel state information of the main carrier unit fed back in one or more fixed special time slots; in other transmission time slots, obtain the MCS level corresponding to the channel state information of the main carrier unit fed back and The absolute value of the difference of the MCS level fed back by the special time slot and the positive or negative status obtain the channel state information of the main carrier unit.

Embodiments of the present invention also provide a terminal device, including:

The main carrier unit state information feedback unit is used to feed back the channel state information of the main carrier unit in the PUCCH;

The secondary carrier unit state information feedback unit is used to feed back the channel state information of the secondary carrier unit in the PUCCH by means of difference quantization coding;

The sub-carrier unit state information feedback unit is configured to, in the PUSCH, according to the difference between the channel state information of multiple sub-carriers in the main carrier unit and the channel state information of the main carrier unit, quantize and encode all the sub-carrier units by difference The channel state information of multiple subcarriers in the main carrier unit is fed back; according to the difference between the channel state information of multiple subcarriers in the auxiliary carrier unit and the channel state information of the auxiliary carrier unit, the difference is quantized and encoded. The channel state information of multiple subcarriers in the secondary carrier unit is fed back.

Wherein, the channel state information is represented by a modulation and coding format MCS level.

Wherein, the secondary carrier unit state information feedback unit includes:

The first feedback subunit is used to feed back the channel state information of the auxiliary carrier unit by using mixed feedback difference quantization coding when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, specifically: acquiring The difference between the MCS level corresponding to the channel state information of the auxiliary carrier unit and the MCS level corresponding to the channel state information of the main carrier unit, the absolute value of the difference and the positive and negative conditions are respectively fed back through bits of a specific length; and /or

The second feedback subunit is used to feed back the channel state information of the auxiliary carrier unit by using mixed feedback difference quantization coding when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak, specifically: Fixed one or more special time slots, feed back the MCS level corresponding to the channel state information of the auxiliary carrier unit; in other transmission time slots, obtain the MCS level corresponding to the channel state information of the auxiliary carrier unit and the special time slot The difference value of the MCS level fed back by the slot, and the absolute value of the difference and the positive and negative conditions are respectively fed back through bits of a specific length.

Wherein, the subcarrier unit state information feedback unit is specifically used for:

According to the MCS level corresponding to the channel state information of the main carrier unit at the previous time and the MCS level corresponding to the channel state information of multiple subcarriers at the current time, the difference between the MCS level of each subcarrier at the current time and the MCS level of the main carrier unit is obtained , feeding back the absolute value of the difference and the positive and negative conditions respectively through bits of a specific length;

According to the MCS level corresponding to the channel state information of the auxiliary carrier unit at the previous moment and the MCS level corresponding to the channel state information of multiple subcarriers at the current moment, the difference between the MCS level of each subcarrier at the current moment and the MCS level of the auxiliary carrier unit is obtained , feeding back the absolute value of the difference and the positive and negative conditions respectively through bits of a specific length.

Wherein, the main carrier unit state information feedback unit is specifically used for:

In PUCCH, the channel state information of the main carrier unit is fed back through fixed-length coding; or the channel state information of the main carrier unit is fed back through difference quantization coding, specifically: in one or more fixed special time slot, feed back the MCS level corresponding to the channel state information of the main carrier unit; in other transmission time slots, obtain the difference between the MCS level corresponding to the channel state information of the main carrier unit and the MCS level fed back in the special time slot value, the absolute value of the difference and the positive and negative conditions are respectively fed back through bits of a specific length.

Embodiments of the present invention also provide a network side device, including:

The main carrier unit state information acquisition unit is used to obtain the channel state information of the main carrier unit according to the fed back channel state information of the main carrier unit in the PUCCH;

The secondary carrier unit state information acquisition unit is used to obtain the channel state information of the secondary carrier unit in the PUCCH according to the channel state information of the secondary carrier unit fed back by means of difference quantization coding;

The sub-carrier unit state information acquisition unit is used to obtain the channel state information of the main carrier unit in the PUSCH according to the channel state information of the main carrier unit and the channel state information of multiple subcarriers in the main carrier unit fed back by means of difference quantization and coding. The channel state information of multiple subcarriers in the main carrier unit; according to the channel state information of the auxiliary carrier unit and the channel state information of the multiple subcarriers in the auxiliary carrier unit fed back by means of difference quantization and encoding, the auxiliary carrier is acquired Channel state information for multiple subcarriers in a cell.

Wherein, the channel state information is represented by a modulation and coding format MCS level.

Wherein, the unit for obtaining state information of the secondary carrier unit includes:

The first feedback subunit is configured to, when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, according to the MCS level corresponding to the channel state information of the main carrier unit and the channel state information corresponding to the fed back auxiliary carrier unit The absolute value of the difference between the MCS level and the MCS level corresponding to the channel state information of the main carrier unit and the positive and negative conditions, to obtain the channel state information of the auxiliary carrier unit; and/or

The second feedback subunit is configured to obtain the MCS corresponding to the channel state information of the auxiliary carrier unit fed back in one or more fixed special time slots when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak Level; in other transmission time slots, obtain the absolute value of the difference between the MCS level corresponding to the channel state information of the secondary carrier unit fed back and the MCS level fed back in the special time slot and the positive and negative conditions, and obtain the MCS level of the secondary carrier unit Channel state information.

Wherein, the subcarrier unit state information acquisition unit is specifically used for:

According to the MCS level corresponding to the channel state information of the main carrier unit at the previous moment, and the absolute value of the difference between the MCS level of each subcarrier and the MCS level of the main carrier unit at the current time fed back, and the positive and negative conditions, the current time is obtained. Channel state information of multiple subcarriers in the main carrier unit;

According to the MCS level corresponding to the channel state information of the auxiliary carrier unit at the previous moment, and the absolute value of the difference between the MCS level of each subcarrier and the MCS level of the auxiliary carrier unit and the positive and negative status of the feedback at the current time, the current time is obtained. Channel state information of multiple subcarriers in the secondary carrier unit.

Wherein, the main carrier unit state information feedback unit is specifically used for:

In the PUCCH, the channel state information of the main carrier unit is obtained according to the channel state information of the main carrier unit fed back through a fixed-length coding method; The channel state information of the main carrier unit, specifically: obtain the MCS level corresponding to the channel state information of the main carrier unit fed back in one or more fixed special time slots; in other transmission time slots, obtain the feedback of the main carrier unit The absolute value of the difference between the MCS level corresponding to the channel state information of the carrier component and the MCS level fed back by the special time slot and the positive or negative status are used to obtain the channel state information of the main carrier component.

Compared with the prior art, the embodiments of the present invention have the following advantages:

In the case of multi-carrier aggregation, the channel state information of the auxiliary carrier unit, multiple subcarriers in the main carrier unit, and multiple subcarriers in the auxiliary carrier unit is fed back by means of difference quantization coding, saving multiple carriers The bit overhead required in the channel state information feedback of the unit.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flow chart of a channel state information feedback method provided in an embodiment of the present invention;

Fig. 2 is another flow chart of the channel state information feedback method provided in the embodiment of the present invention

FIG. 3 is a schematic diagram of a main carrier unit and an auxiliary carrier unit applied in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a feedback mode of channel state information of a main carrier unit provided in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a feedback method of channel state information of a secondary carrier unit provided in an embodiment of the present invention;

Fig. 6 is a schematic diagram of the feedback mode of the channel state information of the subcarrier unit provided in the embodiment of the present invention

FIG. 7 is a schematic diagram of obtaining channel state information of a main carrier unit and an auxiliary carrier unit fed back by a terminal device provided in an embodiment of the present invention;

FIG. 8 is a schematic diagram of obtaining channel state information of subcarrier units fed back by a terminal device provided in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a terminal device provided in an embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a network side device provided in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiments of the present invention provide a channel state information feedback method, which is applied to the terminal device side for channel state information feedback, as shown in FIG. 1 , including:

Step s101, in PUCCH (Physical Uplink Control Channel, physical uplink control channel), feed back the channel state information of the main carrier unit, and feed back the channel state information of the auxiliary carrier unit by means of difference quantization coding;

Step s102, in PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel), according to the difference between the channel state information of multiple subcarriers in the main carrier unit and the channel state information of the main carrier unit, the main The channel state information of multiple subcarriers in the carrier unit is fed back; according to the difference between the channel state information of the multiple subcarriers in the auxiliary carrier unit and the channel state information of the auxiliary carrier unit, the multiple subcarriers in the auxiliary carrier unit are quantified and encoded by difference The channel state information of the carrier is fed back.

When the channel state information feedback method provided by the embodiment of the present invention is applied to a network-side device that obtains the feedback channel state information, as shown in FIG. 2 , it includes:

Step s201, in the PUCCH, obtain the channel state information of the main carrier unit according to the channel state information of the main carrier unit fed back; obtain the channel state information of the auxiliary carrier unit according to the channel state information of the auxiliary carrier unit fed back by means of difference quantization coding channel status information;

Step s202, in the PUSCH, according to the channel state information of the main carrier unit and the channel state information of multiple subcarriers in the main carrier unit fed back by means of difference quantization coding, obtain the channel state information of multiple subcarriers in the main carrier unit ; Obtain channel state information of multiple subcarriers in the secondary carrier unit according to the channel state information of the secondary carrier unit and the channel state information of multiple subcarriers in the secondary carrier unit fed back by means of differential quantization and coding.

The specific implementation manner of the channel state information feedback method in the present invention will be described below in conjunction with specific application scenarios.

In the case of multi-carrier aggregation, for the terminal equipment, the corresponding channel state is independently measured for each carrier unit, and the SINR (Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio) obtained according to the channel state measurement result or other indicators reflecting the current channel The state information maps the SINR or the information reflecting the current channel state to the corresponding MCS (Modulation and Coding Scheme, modulation and coding format) level through the quantization level. The MCS level corresponding to the channel state of each carrier component is: MCS ₁ , MCS ₂ , MCS ₃ , ... MCS _N , where N is the number of activated carrier components.

In the application scenario of the present invention, on the PUCCH, the channel state information of the auxiliary carrier unit is fed back by means of difference quantization coding; The channel state information of subcarriers is fed back. The feedback modes in PUCCH and PUSCH are described respectively below.

(1) Feedback the channel state information of the main carrier unit and the auxiliary carrier unit on the PUCCH.

Firstly, the feedback mode of the channel state information of the main carrier unit is introduced.

The relationship between the main carrier unit and the auxiliary carrier unit is shown in FIG. 3 . Wherein, the primary carrier unit is a carrier unit statically designated by high layer signaling. The main carrier unit can use the following two feedback methods to feed back the channel state information according to the indication information of the high-level signaling, and the schematic diagram is shown in Figure 4:

(1) Feedback quantized MCS level information of a fixed length (for example, a length of 5 bits); or

(2) Use the independent feedback method to feed back the quantized MCS level information at a specific transmission time or agreed time slot, and transmit the currently measured MCS level and the MCS level transmitted at a specific transmission time or agreed time slot at other transmission times or time slots difference in information.

The following describes how to feed back the channel state information of the secondary carrier unit.

In the embodiment of the present invention, for the channel state information feedback mode of the auxiliary carrier unit, the network side pre-configures and sends high-level signaling information about the configuration, and the terminal selects a hybrid feedback mode for the auxiliary carrier unit according to the high-level signaling information Or independent feedback methods. The selection criteria of the two methods are related to the frequency band correlation between the auxiliary carrier unit and the main carrier unit. When the frequency band correlation between the auxiliary carrier unit and the main carrier unit is strong, the hybrid feedback method is adopted; When the frequency band correlation is weak, the independent feedback method is adopted. Among them, the criterion for judging the strength and weakness of the frequency band correlation between the auxiliary carrier unit and the main carrier unit is related to the difference between the MCS level of the auxiliary carrier unit and the MCS level of the carrier unit. The larger the difference, the weaker the correlation. The smaller the value, the stronger the correlation.

For the hybrid feedback method: when the frequency band correlation between the auxiliary carrier unit and the main carrier unit is strong, the channel state information of the auxiliary carrier unit is obtained by the difference _Δi between the MCS level MCS _i measured by the auxiliary carrier unit and the main carrier unit MCS level MCS express. The calculation method of the difference _Δi is shown in the formula (1):

Δ _i =MCS _i -MCS (1)

In the LTE system of the prior art, the MCS is divided into 16 levels, so the MCS level requires 4-bit quantization coding. In the case of carrier aggregation, the main carrier unit designated by the existing LTE system selects and uses 5-bit feedback channel state information according to the measured MCS level. For the difference Δ _i between the MCS level of the auxiliary carrier component and the MCS level of the main carrier component, in the encoding process, 1 bit of information is required to indicate whether Δ _i is positive or negative. Considering that the frequency band correlation between the main carrier unit and the auxiliary carrier unit is relatively large, that is, the value range of _Δi is not too large, _Δi adopts 3-bit quantization coding to meet the requirements of channel state information feedback accuracy, where the first bit Indicates whether _Δi is positive or negative, and the latter 2 bits determine the range of quantization (that is, the absolute value of _Δi ). In addition to using 3-bit quantization coding, of course, 4-bit quantization coding can also be used, wherein the first bit indicates the positive or negative status of _Δi , and the latter 3 bits determine the range of quantization.

For the independent feedback method: the frequency band correlation between the auxiliary carrier unit and the main carrier unit is weak, and the auxiliary carrier unit chooses the dynamic time feedback method, and feeds back the quantized channel state information at a specific transmission time or agreed transmission time slot (such as T ₁ ). MCS level, MCS level adopts 5-bit quantized coding; the difference Δ between the feedback at other fixed transmission times or agreed transmission time slots (such as T ₂ ) and the MCS level transmitted at a specific transmission time or agreed transmission time slot, the difference The value can be quantized and coded with 3 bits (or several bits), where the first bit indicates whether Δ is positive or negative, and the next 2 bits (or several bits) determine the range of quantization (that is, the absolute value of Δ). The calculation method of the difference Δ is shown in formula (2):

$\mathrm{\Δ}={\mathrm{MCS}}_{T_1}-{\mathrm{MCS}}_{T_2}$ (2)

Of course, 4-bit quantization coding can also be used, where the first bit indicates the positive or negative condition of _Δi , and the last 3 bits determine the range of quantization.

A schematic diagram of a feedback manner of channel state information of an auxiliary carrier unit in an embodiment of the present invention is shown in FIG. 5 .

Therefore, no matter which way is adopted, bit overhead can be effectively reduced compared with directly using 5 bits to feed back channel state information in the prior art.

(2) On the PUSCH, the channel state information of multiple subcarriers in the main carrier unit and the auxiliary carrier unit is fed back by way of difference quantization coding.

When each carrier unit (including main carrier unit and auxiliary carrier unit) feeds back channel quality information of multiple subcarriers according to high-level signaling, the channel quality information to be fed back is proportional to the number N of aggregated carrier units. Considering that the amount of feedback information is large, the current PUCCH channel cannot meet the transmission requirements. Therefore, the channel state information of multiple subcarriers of the carrier component can be transmitted on the PUSCH channel.

For the channel state information of multiple subcarriers of the main carrier unit, the feedback method is: according to the broadband MCS level measured by the main carrier unit at the previous moment, and the MCS level of multiple subcarriers measured at the current moment, calculate the MCS of the subcarrier at the current moment The difference between the level MCS _subcarrier and the MCS level MCS _wideband of the main carrier unit. The difference reflects the channel state information of the current subcarrier. The calculation method of the difference Δ is shown in formula (3):

$\mathrm{\Δ}={\mathrm{MCS}}_{\mathrm{wideband}}-{\mathrm{MCS}}_{\mathrm{subcarriage}{r}_i}$ (3)

Where i is used to identify different subcarriers. The difference can also be quantized and encoded with 3 bits (or several bits), where the first bit indicates the positive or negative status of Δ, and the following 2 bits (or several bits) determine the range of quantization (ie, the absolute value of Δ).

与辅载波单元的宽带MCS等级MCS_{wideband，T，PUCCH}的差值。该差值反映了当前子载波的信道状态信息。差值Δ_PUSCH计算方式的如公式(4)所示：For the channel state information of multiple subcarriers of the auxiliary carrier unit, the feedback method is: according to the wideband MCS level of the auxiliary carrier unit measured at the previous moment, and the MCS level of multiple subcarriers measured at the current moment, calculate the subcarrier at the current moment. Carrier's MCS level

The difference with the wideband MCS level MCS _{wideband, T, PUCCH} of the secondary carrier unit. The difference reflects the channel state information of the current subcarrier. The calculation method of the difference _ΔPUSCH is shown in formula (4):

${\mathrm{\Δ}}_{\mathrm{PUSCH}}={\mathrm{MCS}}_{\mathrm{wideband},T,\mathrm{PUCCH}}-{\mathrm{MCS}}_{\mathrm{subcarriage}{r}_j,t}$ (4)

Where j is used to identify different subcarriers. The difference Δ _PUSCH can also be quantized and encoded with 3 bits (or several bits), where the first bit indicates the positive or negative condition of Δ, and the following 2 bits (or several bits) determine the range of quantization (that is, the absolute value of Δ) .

A schematic diagram of a feedback manner of the channel state information of the above-mentioned subcarrier units in the embodiment of the present invention is shown in FIG. 6 .

Since the broadband channel state information of the carrier unit is obtained by using the measurement at the previous moment, when transmitting the channel state information of multiple subcarriers, only the difference between the MCS level of the subcarrier at the current moment and the broadband MCS level of the carrier unit needs to be transmitted. Simultaneously transmit the broadband channel state information of all carrier components.

In the embodiment of the present invention, when receiving the channel state information fed back by the terminal device, the network side device decodes the received channel state information. Specifically, in the PUCCH, according to the correlation between the main carrier unit and the auxiliary carrier unit, and the channel state information of the auxiliary carrier unit fed back through difference quantization coding, the channel state information of the auxiliary carrier unit is obtained; in the PUSCH, According to the channel state information of the main carrier unit and the auxiliary carrier unit, and the channel state information of the main carrier unit and multiple subcarriers in the auxiliary carrier unit fed back by means of difference quantization coding, the main carrier unit and multiple subcarriers in the auxiliary carrier unit are obtained Channel state information of the carrier.

The methods for acquiring the channel state information fed back in the PUCCH and the PUSCH are described below respectively.

(1) Acquiring the channel state information of the main carrier unit and the auxiliary carrier unit fed back by the terminal equipment on the PUCCH.

The way to obtain the channel state information of the main carrier unit:

The network-side device can obtain the channel state information of the main carrier unit according to the fixed-length (for example, 5-bit) quantized MCS level information directly fed back by the terminal device on the PUCCH; or the network-side device can obtain the channel state information of the main carrier unit according to the received Or the quantized MCS level information fed back by the agreed time slot, and the difference between the currently measured MCS level transmitted at other transmission times and the MCS level information transmitted at a specific transmission time or predetermined time slot, and then obtain the channel of the main carrier unit status information.

For the acquisition method of the channel state information of the secondary carrier unit:

When the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, that is, when the terminal device adopts a hybrid feedback method, the network side device can use the MCS level corresponding to the channel state information of the main carrier unit and the auxiliary carrier unit fed back by the terminal device The absolute value and sign of the difference between the MCS level corresponding to the channel state information of the main carrier unit and the MCS level corresponding to the channel state information of the main carrier unit, and then obtain the channel state information of the auxiliary carrier unit through differential decoding.

When the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak, that is, when the terminal device adopts an independent feedback method, the network side device can obtain the channel status of the auxiliary carrier unit fed back by the terminal device in one or more fixed special time slots The MCS level corresponding to the information; in other transmission time slots, the network side device can obtain the absolute value of the difference between the MCS level corresponding to the channel state information of the secondary carrier unit fed back by the terminal device and the MCS level fed back by the special time slot, and the positive or negative status , and then obtain the channel state information of the auxiliary carrier unit through differential decoding.

Fig. 7 is a schematic diagram of obtaining channel state information of a primary carrier unit and a secondary carrier unit fed back by a terminal device in an embodiment of the present invention.

(2) Obtain channel state information of sub-carrier units fed back by the terminal equipment on the PUSCH.

For multiple subcarriers in the main carrier unit, the network side equipment can use the MCS level corresponding to the channel state information of the main carrier unit at the previous moment, and the MCS level of each subcarrier at the current time fed back by the terminal device and the MCS level of the main carrier unit The absolute value of the difference and the positive and negative conditions, and then obtain the channel state information of multiple subcarriers in the main carrier unit at the current moment through differential decoding;

For multiple subcarriers in the secondary carrier unit, the network side device can use the MCS level corresponding to the channel state information of the secondary carrier unit at the previous moment, and the MCS level of each subcarrier at the current time fed back by the terminal device and the MCS level of the secondary carrier unit The absolute value of the difference and the positive and negative status of the difference, and then obtain the channel state information of multiple subcarriers in the secondary carrier unit at the current moment through differential decoding.

Fig. 8 is a schematic diagram of obtaining channel state information of subcarrier units fed back by a terminal device in an embodiment of the present invention.

By using the above method provided by the present invention, in the case of multi-carrier aggregation, the secondary carrier unit, the multiple subcarriers in the main carrier unit, and the channel states of the multiple subcarriers in the secondary carrier unit are analyzed by means of difference quantization coding The information is fed back, which saves the bit overhead required in the channel state information feedback of multiple carrier components.

An embodiment of the present invention also provides a terminal device, as shown in FIG. 9 , including:

The main carrier unit state information feedback unit 10 is used to feed back the channel state information of the main carrier unit in the PUCCH;

The secondary carrier component state information feedback unit 20 is used to feed back the channel state information of the secondary carrier component in the PUCCH by means of difference quantization coding;

The sub-carrier unit state information feedback unit 30 is used to, in the PUSCH, according to the difference between the channel state information of multiple sub-carriers in the main carrier unit and the channel state information of the main carrier unit, by means of difference quantization coding The channel state information of multiple subcarriers is fed back; according to the difference between the channel state information of multiple subcarriers in the auxiliary carrier unit and the channel state information of the auxiliary carrier unit, the channel state information of multiple subcarriers in the auxiliary carrier unit is quantified and encoded by the difference value. Status information for feedback.

Wherein, the channel state information is represented by the modulation and coding format MCS level.

The main carrier unit state information feedback unit 10 is specifically used for: in the PUCCH, feedback the channel state information of the main carrier unit through fixed-length coding (such as 5-bit quantization coding); The channel state information of the carrier unit is fed back, specifically: in one or more fixed special time slots, the MCS level corresponding to the channel state information of the main carrier unit is fed back; in other transmission time slots, the channel state information of the main carrier unit is obtained For the difference between the corresponding MCS level and the MCS level fed back by the special time slot, the absolute value of the difference and the positive and negative status are respectively fed back through bits of a specific length.

Wherein, the secondary carrier unit state information feedback unit 20 may further include:

The first feedback subunit 21 is used to feed back the channel state information of the auxiliary carrier unit by using mixed feedback difference quantization coding when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, specifically: to obtain The difference between the MCS level corresponding to the channel state information of the auxiliary carrier unit and the MCS level corresponding to the channel state information of the main carrier unit, and the absolute value of the difference and the positive and negative conditions are respectively fed back through bits of a specific length; and / or

The second feedback subunit 22 is used to feed back the channel state information of the auxiliary carrier unit by using the mixed feedback difference quantization coding method when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak, specifically: Fixed one or more special time slots, feed back the MCS level corresponding to the channel state information of the auxiliary carrier unit; in other transmission time slots, obtain the MCS level corresponding to the channel state information of the auxiliary carrier unit and the MCS level fed back by the special time slot For the difference value, the absolute value of the difference value and the positive and negative conditions are respectively fed back through bits of a specific length.

Wherein, the subcarrier unit state information feedback unit 30 is specifically used for:

According to the MCS level corresponding to the channel state information of the main carrier unit at the previous time and the MCS level corresponding to the channel state information of multiple subcarriers at the current time, the difference between the MCS level of each subcarrier at the current time and the MCS level of the main carrier unit is obtained , feed back the absolute value of the difference and the positive and negative conditions respectively through bits of a specific length;

According to the MCS level corresponding to the channel state information of the auxiliary carrier unit at the previous moment and the MCS level corresponding to the channel state information of multiple subcarriers at the current moment, the difference between the MCS level of each subcarrier at the current moment and the MCS level of the auxiliary carrier unit is obtained , and feed back the absolute value of the difference and the positive and negative conditions respectively through bits of a specific length.

The embodiment of the present invention also provides a network side device, as shown in FIG. 10 , including:

The main carrier unit state information acquisition unit 40 is used to obtain the channel state information of the main carrier unit in the PUCCH according to the channel state information of the main carrier unit fed back;

The secondary carrier unit state information acquisition unit 50 is used to obtain the channel state information of the secondary carrier unit in the PUCCH according to the channel state information of the secondary carrier unit fed back in the way of difference quantization coding;

The sub-carrier unit state information acquisition unit 60 is used to obtain the main carrier unit in PUSCH according to the channel state information of the main carrier unit and the channel state information of multiple subcarriers in the main carrier unit fed back by means of difference quantization and encoding The channel state information of multiple subcarriers in the secondary carrier unit; according to the channel state information of the secondary carrier unit and the channel state information of multiple subcarriers in the secondary carrier unit fed back by means of difference quantization coding, the channels of multiple subcarriers in the secondary carrier unit are acquired status information.

Wherein, the channel state information is represented by the modulation and coding format MCS level.

Wherein, the main carrier unit state information feedback unit 40 is specifically used for:

In the PUCCH, the channel state information of the main carrier unit is obtained according to the channel state information of the main carrier unit fed back through a fixed-length coding method; The channel state information of the main carrier unit, specifically: obtain the MCS level corresponding to the channel state information of the main carrier unit fed back in one or more fixed special time slots; in other transmission time slots, obtain the channel of the main carrier unit fed back The absolute value of the difference between the MCS level corresponding to the state information and the MCS level fed back by the special time slot, and the positive and negative conditions are used to obtain the channel state information of the main carrier unit.

Wherein, the secondary carrier unit state information acquisition unit 50 includes:

The first acquisition subunit 51 is configured to, when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is strong, according to the MCS level corresponding to the channel state information of the main carrier unit and the corresponding MCS level of the fed back channel state information of the auxiliary carrier unit The absolute value of the difference between the MCS level and the MCS level corresponding to the channel state information of the main carrier unit and the positive and negative conditions, to obtain the channel state information of the auxiliary carrier unit; and/or

The second acquiring subunit 52 is configured to acquire the MCS level corresponding to the channel state information of the auxiliary carrier unit fed back in one or more fixed special time slots when the frequency band correlation between the main carrier unit and the auxiliary carrier unit is weak; In other transmission time slots, obtain the absolute value of the difference between the MCS level corresponding to the channel state information of the secondary carrier unit fed back and the MCS level fed back in a special time slot, and the positive and negative conditions, and obtain the channel state information of the secondary carrier unit.

Wherein, the subcarrier unit state information acquisition unit 60 is specifically used for:

According to the MCS level corresponding to the channel state information of the main carrier unit at the previous moment, and the absolute value of the difference between the MCS level of each subcarrier and the MCS level of the main carrier unit and the positive and negative status of the current feedback, the main carrier at the current time is obtained Channel state information of multiple subcarriers in the unit;

According to the MCS level corresponding to the channel state information of the auxiliary carrier unit at the previous time, and the absolute value of the difference between the MCS level of each subcarrier and the MCS level of the auxiliary carrier unit at the current time fed back, and the positive and negative conditions, the auxiliary carrier at the current time is obtained Channel state information for multiple subcarriers in a cell.

By using the above-mentioned terminal equipment provided by the present invention, in the case of multi-carrier aggregation, the secondary carrier unit, the multiple subcarriers in the main carrier unit, and the channels of the multiple subcarriers in the secondary carrier unit are analyzed by means of difference quantization coding. The state information is fed back, which saves the bit overhead required in the channel state information feedback of multiple carrier components.

For example, in the case of multi-carrier aggregation, (5×N) bits are required when performing feedback according to the wideband channel state information feedback method of the existing LTE system, where N is the number of carrier components to be aggregated. When the differential feedback method provided by the present invention is adopted, for the channel state information of the main carrier unit and the auxiliary carrier unit, if the number of differential quantization bits is 3 bits, then (3×N+2) bits are required. Compared with wideband feedback alone, (2×N-2) bits of overhead can be saved. For the state information of the main carrier unit and the subcarrier unit in the auxiliary carrier unit, it is no longer necessary to transmit the broadband channel state information at the current moment on the uplink shared channel, so compared with the prior art, (5×N) bit overhead can be saved.

Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by software plus a necessary general hardware platform. Based on this understanding, the technical solution of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the units or processes in the drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that the units in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, and can also be changed and located in one or more devices different from the device in the embodiment. The units in the above embodiments can be combined into one unit, and can also be further divided into multiple subunits.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Claims (24)

1. a feedback method of channel status information is characterized in that, comprising:

Go physically among the control channel PUCCH, the channel condition information of main carrier unit is fed back, and the mode by the difference quantization encoding is fed back the channel condition information of auxilliary carrier wave unit;

Among the capable physically shared channel PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described main carrier unit and described main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit; According to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit and described auxilliary carrier wave unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.

2. the method for claim 1 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.

3. method as claimed in claim 2 is characterized in that, described mode by the difference quantization encoding is fed back the channel condition information of described auxilliary carrier wave unit, comprising:

When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is strong, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete:

Obtain the difference of the MCS grade of channel condition information correspondence of the auxilliary carrier wave unit MCS grade corresponding, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit.

4. method as claimed in claim 2 is characterized in that, described mode by the difference quantization encoding is fed back the channel condition information of described auxilliary carrier wave unit, comprising:

When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is weak, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete:

At fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described auxilliary carrier wave unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.

5. method as claimed in claim 2, it is characterized in that, described according to a plurality of subcarriers in the described main carrier unit channel condition information and the difference of the channel condition information of described main carrier unit, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit, comprising:

MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively;

Described according to a plurality of subcarriers in the described auxilliary carrier wave unit channel condition information and the difference of the channel condition information of described auxilliary carrier wave unit, mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit, comprising:

MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.

6. as each described method in the claim 1 to 5, it is characterized in that described channel condition information to the main carrier unit feeds back and comprises:

In PUCCH, coding by regular length or the mode by the difference quantization encoding are fed back the channel condition information of main carrier unit.

7. method as claimed in claim 6 is characterized in that, and is described in PUCCH, and the mode by the difference quantization encoding is fed back the channel condition information of main carrier unit and comprised:

At fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.

8. the acquisition methods of a channel condition information is characterized in that, comprising:

Go physically among the control channel PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back; According to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of auxilliary carrier wave unit;

Among the capable physically shared channel PUSCH, the channel condition information of a plurality of subcarriers in the described main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described main carrier unit; The channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.

9. method as claimed in claim 8 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.

10. method as claimed in claim 9 is characterized in that, the channel condition information of the auxilliary carrier wave unit that described basis is fed back by the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit, comprising:

When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is strong, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit.

11. method as claimed in claim 9 is characterized in that, the channel condition information of the auxilliary carrier wave unit that described basis is fed back by the mode of difference quantization encoding obtains the channel condition information of auxilliary carrier wave unit, comprising:

When the frequency band correlation of described main carrier unit and auxilliary carrier wave unit is weak, obtain MCS grade in the channel condition information correspondence of the described auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit of feedback and described special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.

12. method as claimed in claim 9, it is characterized in that, described according to the main carrier unit channel condition information and the described main carrier unit that feeds back by the mode of difference quantization encoding in the channel condition information of a plurality of subcarriers, obtain the channel condition information of a plurality of subcarriers in the described main carrier unit, comprising:

According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the described main carrier of the current time unit;

The channel condition information of a plurality of subcarriers in the channel condition information of the auxilliary carrier wave unit of described basis and the described auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit, comprising:

According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and auxilliary carrier wave unit, obtain the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave of the current time unit.

13., it is characterized in that the channel condition information of described main carrier unit according to feedback, the channel condition information that obtains the main carrier unit comprise as each described method in the claim 8 to 12:

In PUCCH, the channel condition information of the main carrier unit that feeds back according to the coding by regular length or by the mode of difference quantization encoding obtains the channel condition information of main carrier unit.

14. method as claimed in claim 13, it is characterized in that, described in PUCCH, the channel condition information of the main carrier unit that feeds back according to the coding by regular length or by the mode of difference quantization encoding, the channel condition information that obtains the main carrier unit comprises:

Obtain MCS grade in the channel condition information correspondence of the described main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit of feedback and described special time slot feedback, obtain the channel condition information of main carrier unit.

15. a terminal equipment is characterized in that, comprising:

Main carrier location mode feedback information unit is used at PUCCH, and the channel condition information of main carrier unit is fed back;

Auxilliary carrier wave location mode feedback information unit is used at PUCCH, by the mode of difference quantization encoding the channel condition information of assisting the carrier wave unit is fed back;

Unit of sub-carriers state information feedback unit, be used at PUSCH, according to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described main carrier unit and described main carrier unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described main carrier unit; According to the difference of the channel condition information of the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit and described auxilliary carrier wave unit, the mode by the difference quantization encoding is fed back the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.

16. terminal equipment as claimed in claim 15 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.

17. terminal equipment as claimed in claim 16 is characterized in that, described auxilliary carrier wave location mode feedback information unit comprises:

The first feedback subelement, be used for frequency band correlation when strong in described main carrier unit and auxilliary carrier wave unit, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: as to obtain the difference of the MCS grade of channel condition information correspondence of the auxilliary carrier wave unit MCS grade corresponding, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively with the channel condition information of main carrier unit; And/or

The second feedback subelement, when being used for a little less than the frequency band correlation of described main carrier unit and auxilliary carrier wave unit, use the mode of the difference quantization encoding that mixes feedback that the channel condition information of assisting the carrier wave unit is fed back, concrete: at fixing one or more special time slots, feed back the MCS grade of the channel condition information correspondence of described auxilliary carrier wave unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.

18. terminal equipment as claimed in claim 16 is characterized in that, described unit of sub-carriers state information feedback unit specifically is used for:

MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and main carrier unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively;

MCS grade according to the channel condition information correspondence of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and a plurality of subcarriers of current time, obtain the difference of the MCS grade of the MCS grade of each subcarrier of current time and auxilliary carrier wave unit, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.

19., it is characterized in that described main carrier location mode feedback information unit specifically is used for as each described terminal equipment in the claim 15 to 18:

In PUCCH, the coding by regular length feeds back the channel condition information of main carrier unit; Or the mode by the difference quantization encoding feeds back the channel condition information of main carrier unit, and is concrete: as at fixing one or more special time slots, to feed back the MCS grade of the channel condition information correspondence of described main carrier unit; At other transmission time slots, obtain the difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit and described special time slot feedback, the absolute value and the positive and negative situation of described difference are fed back by the bit of length-specific respectively.

20. a network equipment is characterized in that, comprising:

Main carrier location mode information acquisition unit is used at PUCCH, according to the channel condition information of the main carrier unit that feeds back, obtains the channel condition information of main carrier unit;

Auxilliary carrier wave location mode information acquisition unit is used at PUCCH, according to the channel condition information of the auxilliary carrier wave unit that feeds back by the mode of difference quantization encoding, obtains the channel condition information of auxilliary carrier wave unit;

Unit of sub-carriers state information acquisition unit, be used at PUSCH, the channel condition information of a plurality of subcarriers in the described main carrier unit that feeds back according to the channel condition information of main carrier unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described main carrier unit; The channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit that feeds back according to the channel condition information of auxilliary carrier wave unit and by the mode of difference quantization encoding obtains the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave unit.

21. network equipment as claimed in claim 20 is characterized in that, described channel condition information is represented by modulating-coding form MCS grade.

22. network equipment as claimed in claim 21 is characterized in that, described auxilliary carrier wave location mode information acquisition unit comprises:

The first feedback subelement, be used for frequency band correlation when strong in described main carrier unit and auxilliary carrier wave unit, according to the absolute value and the positive and negative situation of the difference of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of the MCS grade of the channel condition information correspondence of main carrier unit and the feedback MCS grade corresponding, obtain the channel condition information of assisting the carrier wave unit with the channel condition information of main carrier unit; And/or

The second feedback subelement when being used for a little less than the frequency band correlation of described main carrier unit and auxilliary carrier wave unit, obtains the MCS grade in the channel condition information correspondence of the described auxilliary carrier wave unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described auxilliary carrier wave unit of feedback and described special time slot feedback, obtain the channel condition information of auxilliary carrier wave unit.

23. network equipment as claimed in claim 21 is characterized in that, described unit of sub-carriers state information acquisition unit specifically is used for:

According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of previous moment main carrier unit and feedback and main carrier unit, obtain the channel condition information of a plurality of subcarriers in the described main carrier of the current time unit;

According to the absolute value and the positive and negative situation of the difference of the MCS grade of the MCS grade of each subcarrier of current time of the MCS grade of the channel condition information correspondence of the auxilliary carrier wave unit of previous moment and feedback and auxilliary carrier wave unit, obtain the channel condition information of a plurality of subcarriers in the described auxilliary carrier wave of the current time unit.

24., it is characterized in that described main carrier location mode feedback information unit specifically is used for as each described network equipment in the claim 21 to 23:

In PUCCH,, obtain the channel condition information of main carrier unit according to the channel condition information of the main carrier unit that feeds back by the coded system of regular length; Or according to the channel condition information of the main carrier unit that feeds back by the mode of difference quantization encoding, obtain the channel condition information of main carrier unit, concrete: as to obtain MCS grade in the channel condition information correspondence of the described main carrier unit that fixing one or more special time slots feed back; At other transmission time slots, obtain the absolute value and the positive and negative situation of difference of the MCS grade of the MCS grade of channel condition information correspondence of described main carrier unit of feedback and described special time slot feedback, obtain the channel condition information of main carrier unit.

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