WO2011147123A1

WO2011147123A1 - Method and base station for power distribution of physical hybrid automatic repeat request indicator channel

Info

Publication number: WO2011147123A1
Application number: PCT/CN2010/075814
Authority: WO
Inventors: 吴继文; 雷超琴
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-27
Filing date: 2010-08-09
Publication date: 2011-12-01
Also published as: CN102264125A; CN102264125B

Abstract

A method for power distribution of Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) is disclosed in the present invention. The method includes: a Base Station (BS) adjusts the transmission power for the users in the PHICH group according to the Channel Quality Indication (CQI) reported by each user, and the adjusting step includes: the BS determines the reference CQI of the users, determines the power offset value of each user in the PHICH group according to the reference CQI and the CQI reported by the users, and adjusts the user power according to the power offset value. A corresponding BS is also disclosed in the present invention. The present invention reduces the signal interference between the users in the PHICH, and improves the signal quality of the PHICH and the reliability of the system.

Description

Power allocation method for physical hybrid retransmission indication channel and base station

Technical field

The present invention relates to the field of mobile communications technologies, and in particular, to a power allocation method and a base station for a physical hybrid retransmission indication channel.

BACKGROUND OF THE INVENTION With the rapid development of digital communication technologies, users have put forward higher requirements for data communication reliability. In a harsh channel environment, especially in high data rate or terminal high-speed mobile environments, multipath interference and Doppler shifting seriously affect system performance. Therefore, effective error control technology is particularly important. In the field of digital communication, there are basically two main techniques for controlling data errors in communication. One is Automatic Repeat Request (ARQ) technology, and the other is another. It is a Forward Error Correction (FEC) technology. In a wired communication system, a large bandwidth and a high data transmission rate are usually required. For a wired connection, the reliability of data transmission is realized by retransmission. When the current transmission fails, it is required to retransmit the data packet. The transport mechanism is called the automatic repeat request mechanism. In the wireless transmission environment, channel noise and fading due to mobility and interference caused by other users may deteriorate the channel quality, so data packets should be protected to suppress various interferences. This protection is mainly used before use. To the error correction technique, extra bits are transmitted in the packet for error correction. However, too many forward error correction codes will make the transmission efficiency low. Combining these two technologies will result in a hybrid scheme, Hybrid Automatic Repeat Request (HARQ). A technique for hybrid power distribution indicator channel power allocation is described in the following documents: Chinese Patent Application entitled "Power Distribution Method for a Multi-Antenna Hybrid Automatic Repeat Request System", [1] CN 101615932A The public day is December 30, 2009. The power allocation method of the multi-antenna hybrid automatic repeat request system of the document [1] includes: the transmitting end calculates a received signal to noise ratio target value of each data stream; according to the current power allocation information, calculates all the power data to be allocated according to the combining method. The initial value of the received signal to noise ratio of the stream, the current power allocation letter The information includes the power value allocated for each data stream in each transmission before the current transmission and the power value currently allocated for the current transmission; selecting the received signal to noise ratio target value and the received signal noise from the power data stream to be allocated The one data stream having the largest difference from the initial value is used as the current data stream, and the current data stream is allocated power without reducing the received signal to noise ratio that has been achieved for each of the allocated power data streams. The invention [2] is entitled "A method for allocating a physical hybrid retransmission indicating channel resource", the publication number is CN 101227739A, and the publication date is July 23, 2008. The physical hybrid retransmission indication channel resource allocation method in the document [2] includes: the sender uniformly divides the Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) of all the resources to be allocated into multiple configured configurations. In the PHICH group, the subcarriers of the resource group corresponding to the PHICH group are mapped, and the PHICH signal is transmitted through the subcarriers. When the number of PHICHs of a group is not more than half of the maximum number of PHICHs of each group, each PHICH in the group is allocated to k different orthogonal codes and their I/Q positions, and the number of PHICHs of a group gradually increases more than each At half the maximum number of PHICH groups, each group of gradually increasing PHICHs is evenly distributed to the I/Q positions under k orthogonal codes that are orthogonal to the I/Q position of the previous PHICH.

The power allocation method in [1] only considers the power allocation problem between multiple data streams, and does not consider the power allocation problem among multiple users in the physical hybrid retransmission indication channel group, and calculates the receiving data at the transmitting end. The signal-to-noise ratio does not refer to the signal of the feedback channel quality, so it cannot accurately reflect the quality of the current channel; the literature [2] only considers to improve the frequency domain resources of each user in the channel group by adjusting the physical hybrid retransmission indication. Performance, does not consider how to properly allocate power resources between users. The power configuration of the adjusted PHICH is not considered, and the power margin is provided for other control channels under the condition that the total power is constant.

SUMMARY OF THE INVENTION The present invention provides a power allocation method and a base station for a physical hybrid retransmission indication channel, which are reduced.

Signal interference between users in PHICH improves PHICH signal quality and improves system reliability. In order to solve the above technical problem, the present invention provides a power allocation method for a physical hybrid retransmission indication channel, including: the base station adjusts a physical hybrid weight according to a channel quality indicator reported by each user. Transmitting the transmission power of the user in the channel group, the step of adjusting includes: determining, by the base station, a reference channel quality indicator of the user, determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, each of the physical hybrid retransmission indication channel groups The user's power offset value, and user power adjustment based on the power offset value. The foregoing method may further have the following feature: the step of determining, by the base station, the reference channel quality indicator of the user includes: determining, according to the uplink service information of the user, the number of users that need to be answered, determining according to the number of users that need to be answered and the system bandwidth parameter The physical hybrid retransmission indication channel group number and the resource location corresponding to each user response information, and the reference channel quality indicator conforming to the physical hybrid retransmission indication channel performance indicator is determined according to the number of users that need to be answered and the resource location corresponding to the response information. The foregoing method may further have the following feature: determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group, and performing a physical hybrid retransmission indication channel group The signal-to-noise ratio between users is greater than the signal-to-noise ratio threshold set by the system. The foregoing method may further have the following features: after determining a power offset value of each user in the physical hybrid retransmission indication channel group, the step of performing, by the base station, the user power adjustment according to the power offset value includes: improving the channel performance requirement Calculating the power offset value of the user; calculating the sum of the powers of the users in the physical hybrid retransmission indication channel group, and when the sum exceeds the power threshold of the physical hybrid retransmission indication channel group set by the system, reducing the channel performance requirement The user's power offset value; the user satisfying the channel performance requirement is one of the following users: The physical hybrid retransmission indicates that the channel quality in the channel group exceeds the channel quality set by the system, and the physical hybrid retransmission indication channel group The user whose ratio of the average channel quality exceeds the threshold set by the system and the ratio of the lowest channel quality in the physical hybrid retransmission indicator channel group exceeds the threshold set by the system. The method may further include the following: after the base station performs user power adjustment on each physical hybrid retransmission indication channel group, the method further includes: Performing inter-group power adjustment for each physical hybrid retransmission indication channel group includes: normalizing the power offset values of the users in each physical hybrid retransmission indication channel group to obtain a group power offset value, and normalizing according to the system design The fixed physical hybrid retransmission indicates a channel group power threshold, and the power of the physical hybrid retransmission indication channel group whose group power offset value is smaller than the physical hybrid retransmission indication channel group power threshold is increased, and the reduced group power offset value is greater than the The physical hybrid retransmission indicates the power of the physical hybrid retransmission indication channel group indicating the channel group power threshold. The method may further have the following features: in the step of performing power adjustment between groups of each physical hybrid retransmission indication channel group, calculating a group power offset value according to the following manner: _^ = 101og ₁₀ (∑10^)

l=\

Where k is the sequence number of the physical hybrid retransmission indication channel group, which is the group power offset value of the kth physical hybrid retransmission indication channel group, where n is the number of users in the kth physical hybrid retransmission indication channel group, /3⁄4 is the power offset value of the /user.

In order to solve the above technical problem, the present invention further provides a power allocation base station of a physical hybrid retransmission indication channel, the base station includes a user power adjustment module, and the user power adjustment module includes a reference channel quality indication determining unit, and a power offset a value determining unit, a user power adjustment processing unit; the reference channel quality indication determining unit is configured to: determine a reference channel quality indicator of the user, and notify the reference channel quality indicator to the power offset value determining unit; The power offset value determining unit is configured to: determine, according to the reference channel quality indicator and the channel quality indicator reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group, and notify the power offset value to the a user power adjustment processing unit; the user power adjustment processing unit is configured to: perform user power adjustment according to the power offset value. The reference channel quality indication determining unit is further configured to: determine a user's parameter according to the following manner The channel quality indicator is determined: the number of users that need to be answered is determined according to the uplink service information of the user, and the number of physical hybrid retransmission indication channel groups and the resource location corresponding to each user response information are determined according to the number of users to be answered and the system bandwidth parameter, according to The number of users that need to respond and the resource location corresponding to the response information determine a reference channel quality indicator that conforms to the physical hybrid retransmission indication channel performance indicator. The power offset value determining unit is further configured to: when determining a power offset value of each user in the physical hybrid retransmission indication channel group according to the reference channel quality indicator and the channel quality indicator reported by the user, enabling the physical hybrid retransmission indication channel The signal-to-noise ratio between users in the group is greater than the signal-to-noise ratio threshold set by the system. The power offset value determining unit is further configured to: after determining the power offset value of each user in the physical hybrid retransmission indication channel group, adjust the power offset value of the user according to the following manner: improve the channel performance requirement The power offset value of the user is calculated; the sum of the powers of the users in the physical hybrid retransmission indication channel group is calculated, and when the sum exceeds the power threshold of the physical hybrid retransmission indication channel group set by the system, the channel performance requirement is reduced. The user's power offset value; the user who meets the channel performance requirements is one of the following users: The physical hybrid retransmission indicates that the channel quality in the channel group exceeds the channel quality set by the system, and the average in the physical hybrid retransmission indication channel group The user whose channel quality ratio exceeds the threshold set by the system and the ratio of the lowest channel quality in the physical hybrid retransmission indicator channel group exceeds the threshold set by the system. The user power adjustment processing unit is configured to: perform power adjustment on a user in each physical hybrid retransmission indication channel group; and perform inter-group power adjustment on each physical hybrid retransmission indication channel group as follows: The power offset value of the user in the retransmission indication channel group is summed to obtain the group power offset value, and then normalized according to the physical hybrid retransmission indication channel group power threshold set by the system, and the group power offset value is increased to be smaller than the The physical hybrid retransmission indicates the power of the physical hybrid retransmission indication channel group indicating the channel group power threshold, and reduces the power of the physical hybrid retransmission indication channel group whose group power offset value is greater than the physical hybrid retransmission indication channel group power threshold.

In the present invention, when the power allocation of the PHICH is performed, the channel quality information reported by the user is considered, and based on this, the power of the user in the PHICH is adjusted in a targeted manner, thereby reducing the PHICH. Signal interference between users, improve PHICH signal quality, and improve system reliability. At the same time, the power configuration of the PHICH can be adjusted to provide a margin for the power configuration of other control channels under the premise that the total power of the control channel is unchanged. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural diagram of a PHICH group and a composition; FIG. 2 is a flowchart of a power allocation method of a physical hybrid retransmission indication channel in an embodiment.

The base station in the power distribution system of the physical hybrid retransmission indication channel of the preferred embodiment of the present invention includes a user power adjustment module. The user power adjustment module is configured to adjust, according to a channel quality indicator reported by each user, a transmit power of a user in the physical hybrid retransmission indication channel group. The user power adjustment module includes a reference channel quality indication determining unit, a power offset value determining unit, and a user power adjustment processing unit. The reference channel quality indication determining unit is configured to determine a reference channel quality indicator of the user, and notify the power offset value determining unit of the reference channel quality indicator. The reference channel quality indication determining unit is further configured to determine a reference channel quality indicator of the user according to the following manner: determining, according to the uplink service information of the user, the number of users that need to be answered, determining the physics according to the number of users that need to be answered and the system bandwidth parameter The hybrid retransmission indication channel group number and the resource location corresponding to each user response information determine a reference channel quality indicator that conforms to the physical hybrid retransmission indication channel performance indicator according to the number of users that need to be answered and the resource location corresponding to the response information. The power offset value determining unit is configured to determine, according to the reference channel quality indicator and the channel quality indicator reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group, and notify the power offset value to the location The power offset value determining unit. The power offset value determining unit is further configured to: when determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, the power offset value of each user in the physical hybrid retransmission indication channel group, The physical hybrid retransmission indicates that the signal to noise ratio between users in the channel group is greater than the signal to noise ratio threshold set by the system. After the power offset value determining unit is further configured to determine a power offset value of each user in the physical hybrid retransmission indication channel group, the power offset value of the user is adjusted according to the following manner: improving the power of the user that does not meet the channel performance requirement. The offset value is calculated by obtaining the sum of the powers of the users in the physical hybrid retransmission indication channel group. When the sum exceeds the power threshold of the physical hybrid retransmission indication channel group set by the system, the power offset of the user meeting the channel performance requirement is reduced. Set value. The user who meets the channel performance requirement is one of the following users: The ratio of the channel quality in the channel group indicating that the channel quality in the channel group exceeds the channel quality set by the system to the average channel quality in the physical hybrid retransmission indicator channel group exceeds the system setting. The user of the predetermined threshold value and the user who has a ratio of the lowest channel quality in the physical hybrid retransmission indication channel group exceeding the threshold set by the system. The power offset value determining unit is configured to perform user power adjustment according to the power offset value. And performing power adjustment for each user in the physical hybrid retransmission indication channel group; and performing inter-group power adjustment on each physical hybrid retransmission indication channel group, including: retransmitting the power of the user in the channel group for each physical hybrid retransmission After the offset value is summed to obtain the group power offset value, normalization is performed, and according to the physical hybrid retransmission indication channel group power threshold set by the system, the group power offset value is increased to be smaller than the physical hybrid retransmission indication channel group power threshold. The physical hybrid retransmission indicates the power of the channel group, and reduces the power of the physical hybrid retransmission indication channel group whose group power offset value is greater than the physical hybrid retransmission indication channel group power threshold.

In the power allocation method of the physical hybrid retransmission indication channel provided by the present invention, the base station adjusts the transmission power of the user in the physical hybrid retransmission indication channel group according to the Channel Quality Indication (CQI) reported by each user. Compared with the prior art, the PHICH power allocation of the present invention refers to the CQI information reported by the user, and based on this, the user's power in the PHICH is adjusted in a targeted manner, thereby reducing signal interference between users in the PHICH. Improve PHICH signal quality. The base station determines the reference channel quality indicator of the user, determines the power offset value of each user in the physical hybrid retransmission indication channel group according to the reference channel quality indicator and the channel quality indicator reported by the user, and performs the power offset value according to the power offset value. User power adjustment. The system may include multiple PHICH groups, each of which includes multiple users. As shown in FIG. 1, the system includes Ngroup PHICH groups, and the kth PHICH group includes n users, where Λ3⁄4το ≥ 0, k, n are integers greater than 0. (N is unified by Ngroup, the range of n is [1-8], and the range of k is 0-N)

As shown in FIG. 2, the power allocation method of the physical hybrid retransmission indication channel includes the following steps: Step 201: A user reports CQI information to a base station.

The CQI information is feedback information for indicating channel quality, and the user generates corresponding CQI information according to the received downlink channel information. Specifically, the user generates corresponding CQI information according to the Signal to Interference plus Noise Ratio (SINR), the rank of the channel, and the broadband subband configuration of the received downlink signal. The user reports CQI information through the uplink channel. The user reports the CQI information according to the corresponding reporting mode. The reporting mode can be periodic reporting or non-periodic reporting. The user reports the CQI information to the base station to feed back the current channel quality of the user, so that the base station can perform subsequent PHICH power allocation based on the CQI information of each user. Step 202: The base station determines a reference CQI of the user. The method for the base station to determine the reference CQI of the user is: determining the number of users to be answered according to the uplink service information of the user, and determining the number of physical hybrid retransmission indication channel groups according to the number of users to be answered and the system bandwidth parameter (indicated by N _H ) And the resource location corresponding to each user response information (^) determining a reference CQI required to meet the corresponding physical hybrid retransmission indication channel performance indicator according to the number of users that need to be answered and the resource location corresponding to the response information. The reference CQI is used to indicate In order to achieve the PHICH quality required for the target performance, after calculating and obtaining the reference CQI value required to achieve the target performance according to the performance index of the relevant protocol or by simulation operation, for example, in the LTE system, the PHICH performance indicator may be It means that the block error rate (BLER Error Rate, BLER for short) of PHICH is less than 0.1%. The number of PHICH groups to be transmitted for the downlink channel is calculated as follows: For the Frequency Division Duplex (FDD) mode of the Long Term Evolution (LTE) system, N ^ _H is a constant. The evaluation expression is of formula (1):

\fgroup _ / 8)] normal cyclic prefix case

1 ^v PHICH ―

2x "N _g x(N^ /8)] extended cyclic prefix case ( ¹ ) where N _g e {1/6 , 1/2 , 1, 2} is provided by the upper layer, and N^ is the number of downlink resource blocks Used to indicate the downstream bandwidth.

In the Time Division Duplex (TDD) mode, the number of PHICH groups is variable, m乂 Ν , which is related to the uplink and downlink configuration.

Indicates the resource location corresponding to the response message to the user. Refers to the serial number of the PHICH group, where the range of ^; is 0 to

-l. Is the serial number of the user in a certain PHICH group. For the LTE system, the calculation formula for (" , " _Cff ) is as shown in equation (2).

nS o p _ jlowest Jndex T KfSroup

"PHICH - ¹ PRB RA

¹ PHICH ^{1 v} PHICH

, ― , (2) n ^se q = (\ jlowest Jndex , ^group ) mod NTM ^CH

"PHICH ^ PRB RA ' PHICH _ 〃. MRS^ ^{llluu v} SP ¹ where is the spreading factor, is the number of configured PHICH groups, / ^"^ is the smallest PRB index allocated for the uplink resource, / _PfflCT is the correction factor, _DM?S is the cyclic shift of the uplink DMRS. Step 203: The base station determines, according to the reference CQI and the CQI reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group. Determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, the power offset value of each user in the physical hybrid retransmission indication channel group is such that the physical mixed retransmission indicates the signal to noise ratio between the users in the channel group Greater than the signal-to-noise ratio threshold set by the system.

The power offset value is represented by, for example, the first PHICH group contains A users, and the power offset parameter of the user in the PHICH group is]. When the power offset value is positive, it means that the user power needs to be increased. When the power offset value is negative, it means that the user power needs to be reduced. The steps of the power offset value. The mapping relationship between the difference between the CQI and the reference CQI and the power offset value, and the fixed CQI increment and the fixed power increment may be set. When the difference between the CQI and the reference CQI of the user is greater than the sum of the X fixed CQI increments , set the power offset value to the sum of X fixed power increments. Alternatively, there is a linear correspondence between the difference between the reported CQI and the reference CQI and the power offset value. Alternatively, there is a nonlinear correspondence between the difference between the reported CQI and the reference CQI and the power offset value. The above several methods are for illustrative purposes only, and those skilled in the art may also use other methods to determine the power offset value. After determining the power offset value of each user in the PHICH group in this step 203, the power offset value of the user may also be adjusted. The adjustment method includes: the base station performs a response signal of each user according to the calculated PHICH user resource location. Differentiate, divide users into groups of users and groups of users. For the response signals of the same group of users, including k users in the group, the CQI information corresponding to the user can be recorded as [Cg/ ¹ CQI ² ... CQI ^k ], and compared with the reference CQI calculated in this step. Increase the power of users who do not meet channel performance requirements. Calculating the power and value of the user in the physical hybrid retransmission indication channel group. When the power and value exceed the power threshold of the physical hybrid retransmission indication channel group set by the system, the power of the user meeting the channel performance requirement is reduced. This channel performance requirement can be set according to a variety of methods. The user who meets the channel performance requirement is one of the following users: The ratio of the channel quality in the channel group indicating that the channel quality in the channel group exceeds the channel quality set by the system to the average channel quality in the physical hybrid retransmission indicator channel group exceeds the system setting. The user of the predetermined threshold value and the user who has a ratio of the lowest channel quality in the physical hybrid retransmission indication channel group exceeds the threshold value set by the system, wherein the relevant threshold value is set according to system requirements. Step 204: The base station performs user power adjustment according to the power offset value. For the users in the PHICH group, the user power adjustment is performed directly according to the power offset value of the user in the PHICH group. After determining the power offset value of each user in the PHICH group, a user may be selected as the reference user in the PHICH group, and the difference between the power offset value of the other user and the power offset value of the reference user may be calculated. , as the power offset difference for the users in the group. Taking the first group as an example, select user 1 as the reference user, and the power offset of the kth user and user 1 The difference has been the corpse _ ':

Ρ—Β ― PpHicn - PpmcH I = l ...k (3)

Thereby a power offset difference sequence P _B ² ... P _B ^k ] is obtained. The base station performs power allocation and adjustment according to the power offset value of the user in the PHICH group, and can also perform power adjustment of the users in the group according to the power offset difference sequence. Since [P _CH P; _H ^e f _CH ... P _H ^e f _CH ] and _ P _ ... P _ ] can be mutually converted, the MAC is used when each user's power offset is issued. P _CH P; _H ^e f _CH ... P _H ^e f _CH ] information or P _B ² ... P _B ^k ] is equivalent. In addition to power adjustment for users in the PHICH group, inter-group power adjustment can also be performed for the PHICH group in units of PHICH groups. And normalizing the power offset values of the users in each physical hybrid retransmission indication channel group to obtain a group power offset value, and increasing the group power offset according to the physical hybrid retransmission indication channel group power threshold set by the system. a power of the physical hybrid retransmission indication channel group whose value is smaller than the physical hybrid retransmission indication channel group power threshold, and a physical hybrid retransmission indication channel group whose group power offset value is greater than the physical hybrid retransmission indication channel group power threshold The power (the operation to reduce power here needs to be carried out in advance of meeting the relevant performance requirements of the user). The set of power offset values is calculated as follows:

P _A ^m formula (4 )

Where m is the sequence number of the physical hybrid retransmission indication channel group, which is the group power offset value of the mth physical hybrid retransmission indication channel group, and k is the number of users in the mth physical hybrid retransmission indication channel group, ^ ^ refers to the power offset value of the /th user. After the inter-group power adjustment is performed, the power of each user in the PHICH group after the group power offset value is changed is updated accordingly. The base station generates response information of each user according to the PHICH processing flow (including frequency domain repetition, constellation modulation, spread spectrum scrambling, layer mapping, precoding, etc.), and performs intra-group according to the previously determined user power offset parameter P-B. The power adjustment is performed by performing power offset processing, performing intra-group summation, and performing normalization processing, and performing power offset processing on the normalized PHICH signal by using parameter P-A. In summary, the present invention provides a power allocation method for a physical hybrid retransmission indication channel based on feedback, determines a reference CQI, and uses channel quality conditions reflected by CQI signals fed back by the uplink channel to determine a performance requirement that meets PHICH performance. User power offset parameter [/^^ PK and relative offset value [Ρ_ Ρ_ ² ... Ρ_ ], power adjustment for users, reducing interference between users, thereby improving the performance of users with poor channel quality, in the channel Power balancing between users with better quality and users with poor channel quality can reduce the interference of PHICH to a certain extent, and improve the reliability of the system to some extent.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Industrial applicability

In the power allocation of the PHICH in the present invention, the channel quality information reported by the user is taken into consideration, and the power of the user in the PHICH is adjusted in a targeted manner, thereby reducing signal interference between users in the PHICH and improving PHICH signal quality. Improve system reliability. At the same time, the power configuration of the PHICH can be adjusted to provide a margin for the power configuration of other control channels while the total power of the control channel is unchanged.

Claims

Claim

A power allocation method for a physical hybrid retransmission indication channel, the method includes: the base station adjusting, according to a channel quality indicator reported by each user, a transmit power of a user in a physical hybrid retransmission indication channel group,

The step of adjusting includes: determining, by the base station, a reference channel quality indicator of the user, determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group, and User power adjustment is performed based on the power offset value.

2. The method of claim 1 wherein

The step of determining, by the base station, the reference channel quality indicator of the user includes: determining, according to the uplink service information of the user, the number of users that need to respond, determining the number of physical hybrid retransmission indication channel groups according to the number of users to be answered and the system bandwidth parameter, and each The resource location corresponding to the user response information determines a reference channel quality indicator that conforms to the physical hybrid retransmission indication channel performance indicator according to the number of users that need to be answered and the resource location corresponding to the response information.

3. The method of claim 1, wherein

Determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group, so that a signal to noise ratio between users in the physical hybrid retransmission indication channel group is greater than a system setting The threshold of the signal to noise ratio.

4. The method of claim 1, wherein

After determining the power offset value of each user in the physical hybrid retransmission indication channel group, the step of performing base power adjustment by the base station according to the power offset value includes:

Improve the power offset value of users who do not meet the channel performance requirements;

Calculating a sum of powers of users in the physical hybrid retransmission indication channel group, where the sum exceeds a power threshold of the physical hybrid retransmission indication channel group set by the system, and reducing a power offset value of the user that meets the channel performance requirement;

The user who meets the channel performance requirement is one of the following users: The ratio of the channel quality in the channel group indicating that the channel quality in the channel group exceeds the channel quality set by the system to the average channel quality in the physical hybrid retransmission indicator channel group exceeds The user who sets the threshold value of the system and the user who has the ratio of the lowest channel quality in the physical hybrid retransmission indication channel group exceeds the threshold set by the system.

The method of claim 1, wherein, after the base station performs user power adjustment on each physical hybrid retransmission indication channel group, the method further includes:

Performing inter-group power adjustment for each physical hybrid retransmission indication channel group includes: normalizing the power offset values of the users in each physical hybrid retransmission indication channel group to obtain a group power offset value, and normalizing according to the system design The fixed physical hybrid retransmission indicates a channel group power threshold, and the power of the physical hybrid retransmission indication channel group whose group power offset value is smaller than the physical hybrid retransmission indication channel group power threshold is increased, and the reduced group power offset value is greater than the The physical hybrid retransmission indicates the power of the physical hybrid retransmission indication channel group indicating the channel group power threshold.

The method according to claim 5, wherein in the step of performing power adjustment between groups for each physical hybrid retransmission indication channel group, the group power offset value is calculated according to the following manner: _^ = 101og ₁₀ (∑ 10^)

l=\

7. A power mixing base station for physically mixing a retransmission indicator channel, the base station comprising a user power adjustment module, the user power adjustment module comprising a reference channel quality indication determining unit, a power offset value determining unit, and a user power adjustment processing unit The reference channel quality indication determining unit is configured to: determine a reference channel quality indicator of the user, and notify the reference channel quality indicator to the power offset value determining unit; the power offset value determining unit is configured to: Determining, according to the reference channel quality indicator and the channel quality indicator reported by the user, a power offset value of each user in the physical hybrid retransmission indication channel group, and notifying the power offset value to the user power adjustment processing unit; The power adjustment processing unit is configured to: perform user power adjustment according to the power offset value.

The base station according to claim 7, wherein the reference channel quality indication determining unit is further configured to: determine a user's parameter according to the following manner The channel quality indicator is determined: the number of users that need to be answered is determined according to the uplink service information of the user, and the number of physical hybrid retransmission indication channel groups and the resource location corresponding to each user response information are determined according to the number of users to be answered and the system bandwidth parameter, according to The number of users that need to respond and the resource location corresponding to the response information determine a reference channel quality indicator that conforms to the physical hybrid retransmission indication channel performance indicator.

The base station according to claim 7, wherein the power offset value determining unit is further configured to: determine, according to the reference channel quality indicator and the channel quality indicator reported by the user, each user in the physical hybrid retransmission indication channel group When the power offset value is set, the signal-to-noise ratio between users in the physical hybrid retransmission indication channel group is greater than the signal-to-noise ratio threshold set by the system.

The base station according to claim 7, wherein the power offset value determining unit is further configured to: after determining a power offset value of each user in the physical hybrid retransmission indication channel group, power to the user according to the following manner Adjusting the offset value: increasing the power offset value of the user that does not meet the channel performance requirement; calculating the sum of the powers of the users in the physical hybrid retransmission indication channel group, the sum value exceeding the physical hybrid retransmission indication set by the system When the power threshold of the channel group is used, the power offset value of the user meeting the channel performance requirement is reduced; the user satisfying the channel performance requirement is one of the following users: The physical hybrid retransmission indicates that the channel quality in the channel group exceeds the channel quality set by the system. The user, the ratio of the average channel quality in the physical hybrid retransmission indication channel group exceeds the threshold value set by the system, and the ratio of the lowest channel quality in the physical hybrid retransmission indication channel group exceeds the threshold value set by the system. User.

The base station according to claim 7, wherein the user power adjustment processing unit is configured to: perform power adjustment on a user in each physical hybrid retransmission indication channel group; and retransmit each physical hybrid as follows Instructing the channel group to perform inter-group power adjustment: normalizing the power offset values of the users in each physical hybrid retransmission indication channel group to obtain a group power offset value, and normalizing the channel according to the physical hybrid retransmission indication channel set by the system a power threshold of the physical hybrid retransmission indication channel group whose group power offset value is smaller than the physical hybrid retransmission indication channel group power threshold, and the reduced group power offset value is greater than the physical hybrid retransmission indication channel group power The physical hybrid retransmission of the threshold indicates the power of the channel group.