WO2011035558A1

WO2011035558A1 - Power control method and equipment for channel information feedback

Info

Publication number: WO2011035558A1
Application number: PCT/CN2010/001509
Authority: WO
Inventors: 潘学明; 沈祖康; 肖国军
Original assignee: 大唐移动通信设备有限公司
Priority date: 2009-09-28
Filing date: 2010-09-28
Publication date: 2011-03-31
Also published as: CN102014468A; CN102014468B

Abstract

A power control method and an equipment for channel information feedback, which implements power control when multiple user channel quality indicator information based on code division is sent. Wherein, the power control method for scheduling terminal to feedback channel information, includes: sending the determinate maximal permissible sending power information of the terminal, the expected receiving power information of the feedback channel on the base station side, the path loss compensation factor and the adjustment quantities related to the feedback channel format to the terminal; generating power control command word according to the received uplink signal quality, and sending the power control command word to the terminal.

Description

Power control method and device for channel information feedback The present application claims to be submitted to the Chinese Patent Office on September 28, 2009, the application number is 200910235501.7, and the invention name is "a power control method and device for channel information feedback" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

The present invention relates to the field of communication technologies, and in particular, to a power control method and apparatus for performing channel information feedback. Background technique

In the 3rd Generation Partnership Project (3GPP) R8 version (Release-8) Long-Term Evolution (LTE), the terminal (UE) needs to feed back channel indication information through the uplink channel (Channel). Quality Indicator, CQI). Base station

(eNB) can perform downlink dynamic scheduling by using the CQI fed back by the UE. The CQI can be transmitted on a Physical Uplink Control Channel (PUCCH) and can be transmitted on a Physical Uplink Shared Channel (PUSCH). In 3GPP LTE, one physical resource block (PRB) consists of 12 resource elements.

(resource element, RE) composition. Each RE is 15KHz.

FIG. 1 is a schematic diagram of a feedback manner of CQI on a PUCCH. Each subframe (lms) consists of a series of Orthogonal Frequency Division Multiplexing (OFDM) symbols. Taking the length of the Cyclic Prefix (CP) as an example, one subframe is composed of two slots, and each slot contains 7 OFDM symbols. On each PUCCH OFDM symbol, a multi-user CQI transmission method using Code Division Multiplexing (CDM) is used. On a PRB, up to 12 UEs can simultaneously transmit their respective CQIs. There are two OFDM symbols in each slot as pilots (RS) and five symbols are used to transmit CQI data. For each UE, on one OFDM data symbol, Quadrature Phase Shift Keying (Quadature Phase Shift Keying, QPSK) Transmits two-bit channel encoded CQI data. Therefore, in 3GPP LTE, each UE can transmit 20 CQI encoded data through PUCCH in one subframe. The information bits of the CQI on the PUCCH are at most 11 bits.

In the 3GPP Long-Term Evolution-Advance (LTE-A), in order to support higher-end transmission, users may need to feed back more CQI bits. Therefore, in 3GPP LTE-A, the transmission mode of PUCCH CQI of Rel-8 cannot effectively support the demand of CQI feedback. If the PUSCH CQI transmission mode of Rel-8 is used, since one PRB can only give one UE, the CQI feedback overhead will increase. Considering that the coded data of Rel-8 PUCCH CQI is 20 bits and the coded data of Rel-8 PUSCH CQI is 288 bits, it is necessary to design a new transmission mode for CQI feedback in 3GPP LTE-A. The new CQI transmission method needs to effectively support the size of multiple encoded CQI blocks while minimizing the overhead of CQI feedback.

According to these design principles, the applicant has proposed a number of new physical channel structures for transmitting multi-user channel quality indication information in the Chinese patent application file No. 200910091275.X, including: When at least two user terminals use the same time The frequency resource sends respective channel quality indication information, where the time-frequency resource includes at least one frequency domain unit in the frequency domain, and includes at least two data time domain unit sets in the time domain, and each data time domain unit set includes at least two Data time domain units, and channel quality indication information of each user terminal is transmitted on the at least one data time domain unit set by using time domain code division multiple access.

In a similar channel structure design proposed in the Chinese patent application file No. 200910091275.X, one possibility is that the LTE-A or the subsequent evolution system supports the above one or simultaneously supports multiple feedback channel structures, providing different feedbacks. Capacity support, that is, between PUCCH 20 bits and PUSCH 288 bits provided by R8, improving uplink transmission efficiency.

Since the new feedback channel structure is a code-based multi-user multiplexing design, uplink power control technology is needed to ensure good orthogonality between users, while reducing UE power consumption and neighbor cell interference, but there is no new Power control scheme for physical channel structure. Summary of the invention The present invention provides a power control method and apparatus for performing channel information feedback, which is used to implement power control when transmitting multi-user channel quality indication information based on code division.

A power control method for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present invention includes:

The base station side sends the determined maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information to the terminal station side to generate power according to the received uplink signal quality. Controlling the command word and transmitting the power control command word to the terminal.

A power control apparatus for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present invention includes:

a first sending unit, configured to send the determined maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information;

a second sending unit, configured to send the expected received power information of the determined feedback channel on the base station side;

And a power command word sending unit, configured to generate a power control command word according to the received uplink signal quality, and send the power control command word to the terminal.

A power determining method for performing channel information feedback according to an embodiment of the present invention includes: receiving, by a terminal side, a maximum allowed transmit power information of a terminal transmitted by a base station, a desired received power information of a feedback channel at a base station side, a path loss compensation factor, and a feedback. The channel format related adjustment quantity information terminal side measures the downlink signal path loss, and receives the power control command word sent by the base station side, according to the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, and the path loss. The compensation factor, the feedback channel format related adjustment amount information, the downlink signal path loss, and the power control command word obtain power for transmitting the SC-FDMA symbol.

A power determining apparatus for performing channel information feedback according to an embodiment of the present invention includes: a first receiving unit, configured to receive, by a base station side, a maximum allowed transmit power information of a terminal, and a path Diameter loss compensation factor, feedback channel format related adjustment amount information;

a second receiving unit, configured to receive expected received power information of the feedback channel sent by the base station side on the base station side;

a power command word sending unit, configured to receive a power control command word sent by the base station side, and a measuring unit, configured to measure a downlink signal path loss;

a power determining unit, configured to: according to the maximum allowed transmit power information of the terminal, expected receive power information of the feedback channel on the base station side, a path loss compensation factor, feedback channel format related adjustment amount information, the downlink signal path loss, and the power Control command word, get sent

The power of the SC-FDMA symbol.

In the embodiment of the present invention, the base station side sends the determined power control parameter to the terminal, where the terminal includes the maximum allowed transmit power information, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount. Information: The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal. The terminal side receives the power control parameter sent by the base station side, measures the downlink signal path loss, and receives the power control command word sent by the base station side, according to the power control parameter, the downlink signal path loss, and the power control command word. , obtain the power to transmit the SC-FDMA symbol. This embodiment enables power control at a new physical channel structure. DRAWINGS

1 is a schematic diagram of a feedback manner of a CQI on a PUCCH in the prior art;

2 is a schematic flowchart of a power control method for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a method for determining power of channel information feedback according to an embodiment of the present disclosure;

FIG. 4a is a schematic structural diagram of a physical channel that supports one UE and can transmit 144-bit CQI coded bits of a UE without frequency hopping, which is called Format 1 according to an embodiment of the present disclosure;

FIG. 4b is a 144-bit CQI capable of transmitting a UE by supporting one UE according to an embodiment of the present invention. Coded bit, a schematic diagram of a physical channel structure with frequency hopping, called Format 1;

FIG. 4c is a schematic structural diagram of a physical channel that supports one UE and can transmit 288-bit CQI coded bits of a UE without frequency hopping, which is called Format la;

FIG. 5a is a schematic diagram of an embodiment of the present invention for supporting two UEs and transmitting 144-bit CQI coded bits of each UE, without frequency hopping, which is called Format 2;

FIG. 5b is a schematic diagram of an embodiment of the present invention for supporting two UEs, which can transmit 144-bit CQI coded bits of each UE, and has frequency hopping, which is called Format 2;

FIG. 5c is a schematic diagram of an embodiment of the present invention for supporting two UEs, which can transmit 72-bit CQI coded bits of each UE, and has no frequency hopping, and is called Format 2a;

Figure 5 is an embodiment of the present invention, which supports two UEs and can transmit 72-bit CQI coded bits of each UE, and has a frequency hopping embodiment, which is called Format 2a;

6a is an embodiment of the present invention, which supports three UEs and can transmit 96-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 3;

FIG. 6b is a schematic diagram of an embodiment of the present invention for supporting three UEs, which can transmit 96-bit CQI coded bits of each UE, and having frequency hopping, which is called Format 3;

6c is an embodiment of the present invention, which supports three UEs and can transmit 48-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 3a;

Figure 6 is an embodiment of the present invention, which supports three UEs and can transmit 48-bit CQI coded bits of each UE, and has a frequency hopping embodiment, which is called Format 3a;

FIG. 7a is an embodiment of the present invention, which is configured to support six UEs and can transmit 48-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 4;

FIG. 7b is a schematic diagram of an embodiment of the present invention for supporting six UEs, which can transmit 48-bit CQI coded bits of each UE, and has frequency hopping, which is called Format 4;

Figure 7c is an embodiment of the present invention, which supports six UEs and can transmit 24-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 4a;

Figure 7 is an embodiment of the present invention, which supports six UEs and can transmit 24-bit CQI coded bits of each UE, and has a frequency hopping embodiment, which is called Format 4a; FIG. 8 is a schematic structural diagram of a power control apparatus for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a power determining apparatus for performing channel information feedback according to an embodiment of the present invention. detailed description

Referring to FIG. 2, a power control method for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present invention includes the following steps:

Step 201: The base station side sends the determined power control parameter to the terminal, where the terminal includes the maximum allowed transmit power information, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information.

The maximum allowed transmit power information of the terminal is determined according to radio parameters and high layer signaling of the terminal. The base station side transmits the maximum allowed transmit power information, the path loss compensation factor, and the feedback channel format related adjustment amount information of the terminal through the cell broadcast message.

The expected received power information of the feedback channel on the base station side may include: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side. The base station side may send the expected received power information of the feedback channel corresponding to the cell-specific part of the feedback channel on the base station side through the cell broadcast message, and transmit the expected received power information of the feedback channel corresponding to the user-specific part on the base station side through the user-specific high-level signaling.

The feedback channel format related adjustment amount information may be: an absolute power compensation amount of each feedback channel format, or a relative power compensation amount defined for a selected one of the feedback channel formats.

Before generating the power control command word, the method further includes: the base station side transmitting, to the terminal, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode. The base station side transmits the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode by using the cell broadcast message.

Step 202: The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal. Referring to FIG. 3, a power determining method for performing channel information feedback according to an embodiment of the present invention includes the following steps:

Step 301: The terminal side receives the power control parameters sent by the base station side, including the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information.

The terminal side receives the maximum allowed transmit power information, the path loss compensation factor, and the feedback channel format related adjustment amount information of the terminal through the cell broadcast message.

The expected received power information of the feedback channel on the base station side includes: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side. The terminal side receives the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side through the cell broadcast message, and receives the expected received power information of the feedback channel corresponding to the user-specific part of the base station side through the user-specific high-layer signaling.

The feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power compensation amount defined for a selected one of the feedback channel formats.

The terminal side may also receive, by using the cell broadcast message, the power adjustment amount information when the base station supports the frequency hopping mode for the corresponding feedback channel format.

Step 302: The terminal side measures the downlink signal path loss, and when receiving the power control command word sent by the base station side, obtains the sending SC according to the power control parameter, the downlink signal path loss, and the power control command word. The power of the FDMA symbol.

The technical solution of the present invention will be described in detail below with reference to specific embodiments.

The power of each SC-FDMA symbol that the UE feeds back in subframe i is calculated by the following formula: P {i) = rmn {P _CMAX , P ₀ + a * PL+ A _Fonnat (F) + delta _ FH + g( i)} _{(dBm) (1)} where P(i) is the per-SC-FDMA symbol power setting value of the UE in the subframe i for feedback transmission with a new feedback channel structure, in units of dBm;

PCMAX is the maximum allowed transmit power of the UE, and the unit is dBm, which is determined by the radio frequency parameters of the UE and the high layer signaling. P ₀ is the expected received power of the feedback channel on the base station side, in dBm, determined by the simulation result and the actual deployment scenario, and configured by higher layer signaling. Specifically, the Po can also be split into two parts: a cell-specific part P0_norminal and a user-specific part of the PO-UE, wherein the former is sent by the cell broadcast message to all UEs, and the latter is sent by the UE-specific high layer signaling.

"* is the path loss compensation value, the unit is dB, where PL is the downlink path loss measured by the UE; "for the path loss compensation factor, considering the orthogonality between the UEs and the feedback channel demodulation performance, it is preferable to adopt the complete path. Loss compensation, ie "=1, but other values of 0<" <1 are not excluded. If the system only supports "=1, it can be specified by the protocol. If you need to support other values of 0<" <1, you need to notify the UE through the cell-specific broadcast message.

A _F . TM _at (for the feedback channel format related adjustment amount, the unit is _dB , that is, the power compensation amount for each feedback channel format, all UEs are notified by the cell-specific broadcast message. The specific signaling format design can adopt the absolute power of each format. The amount of compensation can also be defined based on a certain format.

4a to 4b are physical channel structures of Format 1, FIG. 5a to FIG. 5d are physical channel structures of Format 2, FIG. 6 and FIG. 6d are physical channel structures of Format 3, and FIGS. 7a to 7d are physical channels of Format 4. structure.

Referring to Figures 4a to 4c, 5a to 5d, 6a to 6d, and 7a to 7d, examples of absolute power compensation amounts are shown:

Format 1 : ( A1/A2/A3 ) dB ; Format 2: (B1/B2/B3) dB ; Format 3: (C1/C2/C3) dB; Format 4: (D1/D2/D3) dB.

As described above, taking four feedback formats as an example, each feedback format defines a set of power compensation amounts, each group has three values, or other numbers, and three are only examples, which can be based on the cell channel environment, interference environment, and detection. It is required to select a group from the three groups and notify all users by broadcast message. If multiple feedback formats are supported in the system at the same time, the power adjustment of each feedback format needs to be broadcast simultaneously.

An example of the relative power compensation amount will be described below. Here, Format 1 is taken as the power reference amount. Define the amount of compensation for other formats relative to Format 1.

Format 2: (E1/E2/E3) dB; Format 3: (F1/F2/F3) dB; Format 4: (G1/G2/G3) dB„

As described above, taking four feedback formats as an example, in addition to the reference format Formatl, each feedback format defines a set of power compensation amounts, each group has three values (may be other numbers, three are just examples), according to The cell channel environment, the interference environment, the detection request, and the like are selected from three, and all users are notified by broadcast messages. If multiple feedback formats are supported in the system at the same time, the power adjustment amount of each feedback format needs to be broadcast at the same time.

Optionally, according to whether each feedback format supports frequency hopping, the power adjustment amount delta_FH related to frequency hopping may be increased, and is sent to the UE according to a protocol specification or based on a cell broadcast manner. If FM is not supported, there is no need to add delta-FH in the above formula, ie:

P (0 = min{ _CMAX , P ₀ +a* PL+A _foimM (F) + g (!·)} g(i) is the closed-loop power adjustment of the ith frame, using the cumulative effective mode. When the new channel Structural inverse

M-1

g(i) = g(il) + Y6 (ik _m )

When fed using periodic feedback scheme, "=., G (il ) is the closed loop power adjustment amount of the i-1 frame, M being integer not less than 1, and K _m is the m-numbered subframe i-th frame before, ^δ is the power control command word. The g(i) adjustment state of the i-th frame is generated by the cumulative sum of the state g(il) of the i-1 frame and the power control command word of the previous M frame, where:

For frequency division duplex (FDD) systems, M = l and ⁼⁴ .

For Time Division Duplex (TDD) systems, M is given in 3GPP TS 36.213 V8.7.0.

When the new channel structure feedback adopts the aperiodic feedback mode, gii) = g(iD + S {iK _PUSCH ) ^ where _g( i_i) is the closed-loop power adjustment amount of the i-th frame, which is the power control command word, K _PUSCH The pre-set value can be specified by the description of the 3GPP specification TS36.213 V8.7.0 version 5丄1.1.

Referring to FIG. 8 , a scheduling terminal provided by the embodiment of the present invention performs channel information feedback. The power control device includes: a transmitting unit 81 and a power command word transmission 82.

The sending unit 81 is configured to send, to the terminal, the determined maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information;

The power command word sending unit 82 is configured to generate a power control command word according to the received uplink signal quality, and send the power control command word to the terminal.

The expected received power information of the feedback channel on the base station side includes: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.

The sending unit 81 is configured to send, by using a cell broadcast message, the expected received power information of the feedback channel corresponding to the cell-specific part to the terminal, and send the feedback channel corresponding to the user-specific part to the base station side by using the user-specific high-layer signaling. It is desirable to receive power information.

The sending unit 81 is configured to send, by using a cell broadcast message, a maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information.

The sending unit 81 is further configured to send, to the terminal, power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.

The sending unit 81 is configured to send, by using a cell broadcast message, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.

As shown in FIG. 9, a power determining apparatus for performing channel information feedback according to an embodiment of the present invention includes:

The receiving unit 91 is configured to receive, by the base station side, the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information;

a measuring unit 92, configured to measure a downlink signal path loss;

The power determining unit 93 is configured to: when receiving the power control command word sent by the base station side, according to The maximum allowable transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, the feedback channel format related adjustment amount information, the downlink signal path loss, and the power control command word, and the sending SC is obtained. - The power of the FDMA symbol.

The receiving unit 91 is configured to receive, by using a cell broadcast message, the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side, and receive the expected received power of the feedback channel corresponding to the user-specific part by the user-specific high-layer signaling on the base station side. information.

The receiving unit 91 is configured to receive, by using a cell broadcast message, a maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information of the terminal.

The receiving unit 91 is further configured to receive power adjustment amount information that is sent by the base station when the corresponding feedback channel format supports the frequency hopping mode.

The receiving unit 91 is configured to receive, by using a cell broadcast message, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.

The power determining unit 93 can calculate the power of the transmitted SC-FDMA symbol according to the following formula:

P (0 = min{P _CMAX , P ₀ + a * PL+A _fom3t (F) + delta _FH + g(i)}

P(i) is the SC-FDMA symbol power setting value of the UE in the subframe i, which is fed back in the new feedback channel structure, in units of dBm; P _CMA is the maximum allowed transmit power of the UE; P0 is the feedback channel. The expected received power at the base station side; "* is the path loss compensation value, in dB, where

PL is the downlink path loss measured by the UE; "is the path loss compensation factor; TMM ( ^f ) is the feedback channel format correlation adjustment, in dB; g(i) is the closed-loop power adjustment of the ith frame, delta-FH The power adjustment amount when the corresponding feedback channel format supports the frequency hopping mode is indicated. The power determining unit 93 may also calculate the power for obtaining the transmitted SC-FDMA symbol according to the following formula:

P (0 = min { P _c , Ρ ₀ + α * PL+ A _Format {F) + g (/)}

Wherein, P(i) is a per-SC-FDMA symbol power setting value of the UE in the subframe i, which is fed back in a new feedback channel structure, in units of dBm; P _CMA x is the maximum allowed transmit power of the UE; Po is a feedback channel. The expected received power at the base station side; is the path loss compensation value, the unit is dB, where PL is the downlink path loss measured by the UE; "is the path loss compensation factor; "^ (for the feedback channel format related adjustment amount, the unit is dB; g(i) is the closed loop power adjustment of the ith frame.

The power is determined by the unit 93, when the periodic feedback mode is used,

- , g(il) is the closed-loop power adjustment of the i-1th frame, M is an integer not less than 1, and k _m is the number of the mth subframe before the ith frame, which is the power control command word; the i-th frame The g(i) adjustment state is generated by the cumulative sum of the state g(il) of the i-1 frame and the power control command word of the previous M frame; when using the aperiodic feedback mode, g« = g - O + - where, _g( i_i) is the closed-loop power adjustment of the i-1th frame, ³ is the power control command word, and K _PUSCH is a preset value, for example: specified by 3GPP TS36.213 V8.7.0 Table 5.1.1.1-1.

In the embodiment of the present invention, the base station side sends the determined power control parameter to the terminal, where the terminal includes the maximum allowed transmit power information, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount. Information: The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal. The terminal side receives the power control parameter sent by the base station side, measures the downlink signal path loss, and receives the power control command word sent by the base station side, according to the power control parameter, the downlink signal path loss, and the power control command. Word, obtains the power to send SC-FDMA symbols. This embodiment enables power control of the new physical channel structure.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that the flow chart can be implemented by computer program instructions And/or a combination of the processes and/or blocks in the block diagrams, and the flowcharts and/or blocks in the flowcharts and/or block diagrams. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device The instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that <RTIgt; </ RTI> <RTIgt; Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A power control method for scheduling channel information feedback by a terminal, characterized in that the method comprises the following steps:

The base station side sends the determined maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information to the terminal;

The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal.

2. The method according to claim 1, wherein the maximum allowed transmit power information of the terminal is determined according to radio frequency parameters and/or higher layer signaling of the terminal.

The method according to claim 1, wherein the expected received power information of the feedback channel on the base station side comprises: the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side and the user-specific part corresponding to The feedback channel is expected to receive power information at the base station side.

The method according to claim 3, wherein the base station side transmits the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side by using the cell broadcast message;

The base station side transmits the expected received power information of the feedback channel corresponding to the user-specific part on the base station side through user-specific high-layer signaling.

5. The method according to claim 1, wherein the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power defined for a selected one of the feedback channel formats. The amount of compensation.

The method according to claim 1, wherein the base station side transmits the maximum allowable transmit power information, the path loss compensation factor, and the feedback channel format related adjustment amount information of the terminal through the cell broadcast message.

The method according to any one of claims 1 to 6, wherein before the generating the power control command word, the method further comprises:

The base station side sends the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode. Send it to the terminal.

The method according to claim 7, wherein the base station side sends the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode by using a cell broadcast message.

A power control apparatus for scheduling channel information feedback by a terminal, which is characterized by:

a sending unit, configured to send, to the terminal, the determined maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information;

The apparatus according to claim 9, wherein the expected received power information of the feedback channel on the base station side comprises: the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side and the user-specific part corresponding to The feedback channel is expected to receive power information at the base station side.

The device according to claim 10, wherein the sending unit is configured to send, by using a cell broadcast message, the expected received power information of the feedback channel corresponding to the cell-specific part to the terminal on the base station side; The signaling transmits the expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.

12. The apparatus according to claim 9, wherein the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power defined for a selected one of the feedback channel formats. The amount of compensation.

The device according to claim 9, wherein the sending unit is configured to send, by using a cell broadcast message, a maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information.

The device according to any one of claims 9-13, wherein the sending unit is further configured to send, to the terminal, power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.

The device according to claim 14, wherein the sending unit is configured to send, by using a cell broadcast message, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.

16. A method for determining power of channel information feedback, the method comprising the steps of:

The terminal side receives the maximum allowed transmit power information of the terminal transmitted by the base station side, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount if/

The terminal side measures the downlink signal path loss, and when receiving the power control command word sent by the base station side, according to the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel. The format-related adjustment amount information, the downlink signal path loss, and the power control command word obtain power for transmitting a single carrier frequency division multiplexing SC-FDMA symbol.

The method according to claim 16, wherein the expected received power information of the feedback channel on the base station side comprises: the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side and the user-specific part corresponding to The feedback channel is expected to receive power information at the base station side.

The method according to claim 17, wherein the terminal side receives the expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side by using the cell broadcast message;

The terminal side receives the expected received power information of the feedback channel corresponding to the user-specific part on the base station side through the user-specific high-layer signaling.

The method according to claim 16, wherein the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power defined for a selected one of the feedback channel formats. The amount of compensation.

The method according to claim 16, wherein the terminal side receives the maximum allowed transmit power information, the path loss compensation factor, and the feedback channel format related adjustment amount information of the terminal through the cell broadcast message.

21. The method according to claim 16, wherein the terminal side calculates the power for transmitting the SC-FDMA symbol according to the following formula:

P (0 = min { P _c corpse ₀ + α * PL + A _Fomiat (F) + g (

Where P(i) is the per-SC-FDMA symbol power setting value of the UE in the subframe i that is fed back with a new feedback channel structure; P _CMAX is the maximum allowed transmit power of the UE; P. The expected received power of the feedback channel on the base station side; is the path loss compensation value, where PL is the downlink path loss measured by the UE; "is the path loss compensation factor; (^ is the feedback channel format correlation adjustment; g(i) is the The closed loop power adjustment of the i frame.

The method according to claim 16, further comprising: receiving, by the terminal side, power adjustment amount information that is sent by the base station when the corresponding feedback channel format supports the frequency hopping mode.

The method according to claim 22, wherein the terminal side receives the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode by using a cell broadcast message.

The method according to claim 22, wherein the terminal side calculates the power for transmitting the SC-FDMA symbol according to the following formula, including:

P (!') = min { _CMAX , P ₀ + a * PL+ A _?ormat (E) + delta _ FH + g (i)}

Where P(i) is the per-SC-FDMA symbol power setting value of the UE in the subframe i that is fed back with a new feedback channel structure; PCMAX is the maximum allowed transmit power of the UE; P. The expected received power of the feedback channel on the base station side; "* is the path loss compensation value, where PL is the downlink path loss measured by the UE; "is the path loss compensation factor; ^Af . "^ ( ^F ) is the feedback channel format correlation adjustment amount; g (i) is the closed-loop power adjustment amount of the ith frame, and delta_FH indicates the power adjustment amount when the corresponding feedback channel format supports the frequency hopping mode.

The method according to claim 21 or 24, wherein when periodic feedback g(i) = g(i - \) + Y s (i - k _m ) is employed

In the case, TM=. , g(il) is the closed-loop power adjustment of the i-1th frame, M is an integer not less than 1, and 13⁄4 is the number of the mth subframe before the i-th frame, which is a power control command. Word

When aperiodic feedback is used, g^ g + ^ - KpUSCH ) , where g(il) is the closed-loop power adjustment of the i-1th frame, K _PUSCH is a preset value, and ⁴⁵ is the power control command word. .

A power determining apparatus for performing channel information feedback, comprising: a receiving unit, configured to receive a maximum allowed transmit power information of a terminal transmitted by a base station side, an expected received power information of a feedback channel at a base station side, and path loss compensation. Factor, feedback channel format related adjustment amount information;

a measuring unit for measuring a downlink signal path loss;

a power determining unit, configured to adjust, according to the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format, when receiving the power control command word sent by the base station side The quantity information, the downlink signal path loss, and the power control command word obtain the power for transmitting the single-carrier frequency division multiplexing SC-FDMA symbol.

The apparatus according to claim 26, wherein the expected received power information of the feedback channel on the base station side comprises: the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side and the user-specific part corresponding to The feedback channel is expected to receive power information at the base station side.

The device according to claim 26, wherein the receiving unit is configured to receive, by using a cell broadcast message, expected received power information of a feedback channel corresponding to a cell-specific part on a base station side; The expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.

The apparatus according to claim 26, wherein the power determining unit is configured to calculate the power of the transmitted SC-FDMA symbol according to the following formula:

P

+a * PL+A _fomat (F) + g(i)}

Where P(i) is the per-SC-FDMA symbol power setting value of the UE in the subframe i for feedback transmission in the new feedback channel structure; P _CMAX is the maximum allowed transmit power of the UE; P0 is the feedback channel on the base station side Expected received power; is the path loss compensation value, where PL is the downlink measured by the UE Path loss; "is the path loss compensation factor; ^Af ." ^ ( ^F ) is the feedback channel format correlation adjustment; g (i) is the closed-loop power adjustment of the ith frame.

30. The apparatus according to claim 26, wherein the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power defined by a selected feedback channel format. The amount of compensation.

The device according to claim 26, wherein the receiving unit is configured to receive, by using a cell broadcast message, a maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information.

The device according to claim 26, wherein the receiving unit is further configured to receive power adjustment amount information that is sent by the base station when the corresponding feedback channel format supports the frequency hopping mode.

The device according to claim 32, wherein the receiving unit is configured to receive, by using a cell broadcast message, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.

The apparatus according to claim 32, wherein the power determining unit is configured to calculate the power of the transmitted SC-FDMA symbol according to the following formula:

P (0 = min{i> _CMAX , ₀ + a * Z+A _Fonnat (F) + delta _ FH + g(i)}

Where P(i) is the per-SC-FDMA symbol power setting value of the UE in the subframe i, which is fed back with a new feedback channel structure; PCMAX is the maximum allowed transmit power of the UE; P0 is the expectation of the feedback channel on the base station side. Receive power; is the path loss compensation value, where PL is the downlink path loss measured by the UE; "is the path loss compensation factor; ^Δρ ( ^F ) is the feedback channel format correlation adjustment; g (i) is the closed-loop power adjustment of the ith frame The amount, delta_FH, represents the amount of power adjustment when the corresponding feedback channel format supports the frequency hopping mode.

35. Apparatus according to claim 29 or claim 34, wherein when periodic feedback g ) = 8(i - l) + ∑ 3 ii - k _m ) is employed

In the mode, g(il) is the closed-loop power adjustment amount of the i-1th frame, and M is An integer not less than 1, which is the number of the mth subframe before the ith frame, and is a power control command word;

When aperiodic feedback is used, g(0 = g(M) + W-^; _SOT ), where _g( i_i) is the closed-loop power adjustment of the i-1th frame, and K _PUSCH is a preset value. , for the power control command word.