WO2012151949A1

WO2012151949A1 - Phich power control method and device

Info

Publication number: WO2012151949A1
Application number: PCT/CN2011/082886
Authority: WO
Inventors: 雷超琴
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-07-05
Filing date: 2011-11-24
Publication date: 2012-11-15
Also published as: CN102868503B; CN102868503A

Abstract

Disclosed are a PHICH power control method and device. The first power is determined according to the power bias during PDCCH scheduling performed on a terminal. According to the DCI format and the CCE aggregation degree during the PDCCH scheduling performed on the terminal, the second power of the PHICH of the terminal with respect to the PDCCH is determined by looking up a table. The third power of the terminal is determined according to whether the terminal has a quasi-orthogonal interference terminal in a terminal group. The power of the terminal and the power of the terminal group are determined according to the determined first power, second power, and third power. The power of the terminal group is compared with the set maximum value and minimum value of distributed PHICH power, respectively, so as to homogenize the power of the terminal group in the range defined by the set maximum value and minimum value of the distributed PHICH power. The present invention solves the problem of terminal data retransmission and base station side packet loss resulted from inaccurate PHICH power control in the prior art.

Description

PHICH power control method and device

The present invention relates to the field of wireless communication technologies, and in particular, to a physical hybrid retransmission indication channel.

(Physical hybrid-ARQ indicator channel, PHICH) Method and device for power control. Background technique

In the Long Term Evolution (LTE) system, the PHICH carries the mission of the base station to make the negative information (Acknowledgement, NACK) and the acknowledgement of the ACK (Acknowledgement) of the uplink transmit signal. The performance of the PHICH will be directly Determine the terminal's judgment on the performance of the uplink service.

The PHICH power is the main factor that reflects the performance of the PHICH. By controlling the power of the PHICH, unnecessary data retransmission of the terminal can be avoided. At the same time, packet loss of the service data on the base station side can be avoided.

At present, the power of the PHICH is controlled mainly by mapping the downlink radio quality information reported by the terminal to the PHICH information, and controlling the PHICH by the presence or absence of the transmission of the uplink scheduling grant indicating the transmission of the shared channel. power. However, the radio quality information of the downlink reported by the terminal does not reflect the status of the PHICH channel well, resulting in inaccurate power of the determined PHICH, resulting in unnecessary data retransmission of the terminal, affecting the user experience, and causing Packet loss of uplink service data on the base station side. Summary of the invention

In view of the above, the present invention provides a PHICH power control method and apparatus, which are used to solve the problem that the PHICH power control is inaccurate in the prior art, and the terminal data retransmission and the base station side packet loss are caused. In order to solve the above problems, the technical solution of the present invention is implemented as follows:

A PHICH power control method includes:

Determining a first power according to a power offset when performing PDCCH scheduling on the terminal for each terminal in the terminal group; determining a terminal according to a DCI format and a channel CCE aggregation degree when performing PDCCH scheduling on the terminal; a second power of the PHICH relative to the PDCCH; determining, according to whether the terminal has a quasi-orthogonal interference terminal in the terminal group, determining a third power of the terminal; according to the determined first power, second power, and third power Determining the power of the terminal and determining the power of the terminal group;

Comparing the determined power of the terminal group with the maximum value and the minimum value of the set PHICH power allocation, respectively, to equalize the power of the terminal group to the set maximum value of the PHICH power allocation And the interval formed by the minimum value.

The method for determining the first power is:

The base station determines the power offset as the first power of the terminal according to a corresponding power offset when scheduling the PUSCH of the terminal.

The method for determining the second power is:

The lookup table determines the second power of the PHICH of the terminal relative to the PDCCH according to the DCI format and the CCE aggregation degree of the PUSCH of the terminal, and the PDCCH performance table and the PHICH performance table obtained by the simulation.

The method for determining the third power is:

Determining whether there is a quasi-orthogonal interference terminal of the terminal in the terminal group where the terminal is located, and determining that the third power of the terminal is the set power value when determining that the quasi-orthogonal interference terminal of the terminal exists in the terminal group Where is a value greater than 0; otherwise, the third power of the terminal is 0.

Wherein, when the power of the terminal group is greater than a maximum value of the set PHICH power allocation, the process of homogenizing the power includes:

Determining a difference between a maximum value of the set PHICH power allocation and a power of the terminal group, Determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to the power of each terminal of the terminal group, and uniformly equalizing the power of the terminal group to Within the interval formed by the maximum and minimum values of the set PHICH power distribution.

Wherein, when the power of the terminal group is less than a minimum value of the set PHICH power allocation, the process of homogenizing the power includes:

Determining, by the difference between the power of the terminal group and the minimum value of the set PHICH power allocation, determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to The power of each terminal of the terminal group is equalized in the interval formed by the maximum value and the minimum value of the set PHICH power allocation.

A PHICH power control device includes:

a terminal power determining module, configured to determine, according to a power offset when performing PDCCH scheduling on the terminal, for each terminal in the terminal group; according to a DCI format and a CCE aggregation degree when performing PDCCH scheduling on the terminal, Checking a table to determine a second power of the PHICH of the terminal relative to the PDCCH; determining, according to whether the terminal has a quasi-orthogonal interference terminal in the terminal group, determining a third power of the terminal; and determining, according to the determined first power, Determining the power of the terminal according to the second power and the third power; determining the power of the terminal group;

And an adjusting module, configured to compare the determined power of the terminal group with a maximum value and a minimum value of the set PHICH power allocation, respectively, to homogenize the power of the terminal group to the set PHICH Within the interval formed by the maximum and minimum values of power distribution.

The terminal power determining module is configured to determine the power offset as the first power of the terminal according to a power offset corresponding to scheduling the PUSCH of the terminal.

The terminal power determining module is configured to: according to a DCI format and a CCE aggregation degree of the terminal when scheduling the PUSCH of the terminal, and a PDCCH performance table and a PHICH obtained by the simulation, The performance table is lookup table to determine the second power of the PHICH of the terminal relative to the PDCCH.

The terminal power determining module is configured to determine whether a quasi-orthogonal interference terminal of the terminal exists in the terminal group where the terminal is located, and determine that the quasi-orthogonal interference terminal of the terminal exists in the terminal group, The third power of the terminal is a set power value, where is a value greater than 0; otherwise, the third power of the terminal is 0.

The adjusting module is configured to determine, when the power of the terminal group is greater than a maximum value of the set PHICH power allocation, a difference between a maximum value of the set PHICH power allocation and a power of the terminal group, according to Determining the average value of the difference by the difference and the number of terminals included in the terminal group; averaging the average value to the power of each terminal of the terminal group, and homogenizing the power of the terminal group to Within the interval formed by the maximum and minimum values of the PHICH power distribution.

The adjusting module is configured to determine, when the power of the terminal group is less than a minimum value of a set PHICH power allocation, a difference between a power of the terminal group and a minimum value of a set PHICH power allocation, according to Determining the average value of the difference by the difference and the number of terminals included in the terminal group; averaging the average value to the power of each terminal of the terminal group, and homogenizing the power of the terminal group to Within the interval formed by the maximum and minimum values of the PHICH power distribution.

The present invention provides a PHICH power control method and apparatus. In the control method, the base station performs power scheduling on a Physical Downlink Control Channel (PDCCH) for each terminal in the terminal group according to the physical downlink control channel (PDCCH). Determining the first power and the second power, determining the third power of the terminal according to whether there is a quasi-orthogonal interference terminal; determining the power of each terminal, determining the power of the terminal group; and homogenizing the power of the terminal group Within the interval formed by the maximum and minimum values of the PHICH power distribution. In the present invention, according to the situation when the terminal performs PDCCH scheduling, determining the PHICH power of each terminal in the terminal group and determining the PHICH power of the terminal group, the downlink PHICH performance and the PDCCH performance can be guaranteed. Therefore, unnecessary data retransmission of the terminal can be effectively avoided, and packet loss of the uplink service data on the base station side is also avoided. DRAWINGS

1 is a schematic diagram of a PHICH power control process provided by the present invention;

2 is a schematic diagram of a detailed process of PHICH power control according to the present invention; FIG. 3 is a LTE frequency division duplex (Frequency Division Duplexing, provided by the present invention);

FDD) Process diagram of the PHICH power control method in the system;

4 is a schematic diagram of a PHICH power control process in an LTE Time Division Duplexing (TDD) system according to the present invention;

FIG. 5 is a schematic structural diagram of a PHICH power control apparatus according to the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a PHICH power control method and apparatus for solving the problem of retransmission of terminal data and packet loss at the base station due to inaccurate PHICH power control in the prior art.

FIG. 1 is a schematic diagram of a PHICH power control process provided by the present invention, where the control process includes the following steps:

S101: The base station determines, for each terminal in the terminal group, a first power according to a power offset when the terminal performs PDCCH scheduling.

S102: The base station determines, according to a downlink control information (Downlink Control Information, DCI) format and a channel control element (CCE) aggregation degree of the PDCCH scheduling on the terminal, a table to determine a PHICH of the terminal relative to the PDCCH. Two power. Among them, the performance table can be obtained by simulating the performance of PHICH and PDCCH. The base station determines the first power and the second power of the terminal according to the DCI format, the CCE aggregation degree, and the corresponding power offset of the PDCCH scheduled for the terminal.

S103: The base station determines, according to whether the terminal has a quasi-orthogonal interference terminal in the terminal group, determining a third power of the terminal.

The quasi-orthogonal interference terminal refers to that the orthogonal sequences used by the two terminals in the spread spectrum scrambling are not completely orthogonal in the same PHICH terminal group.

In the present invention, the above S101, S102 and S103 are executed in no particular order, as long as the three powers of the terminal are obtained.

S104: Determine, according to the determined first power, the second power, and the third power of each terminal, the power of each terminal, and determine the power of the terminal group.

Since a plurality of terminals are included in each terminal group, when the power of each terminal is determined based on the sum of the first power, the second power, and the third power, the power of the terminal group is obtained by summing each terminal power.

S105: Compare the determined power of the terminal group with a maximum value and a minimum value of the set PHICH power allocation, and normalize the power of the terminal group to a range corresponding to a maximum value and a minimum value of the PHICH power allocation. In the interval formed by the maximum value and the minimum value of the PHICH power distribution, the following is also the same.

In the present invention, the maximum and minimum values of the PHICH power allocation are set, wherein the maximum and minimum values of the PHICH power allocation are determined by the base station according to the downlink overall transmit power and the power allocation of other channels.

In the present invention, the PHICH power of each terminal in the terminal group is determined according to the situation in which the terminal performs PDCCH scheduling, and the PHICH power of the terminal group is determined. Therefore, the performance of the downlink PHICH can be consistent with the PDCCH performance, thereby effectively avoiding the terminal. The unnecessary data is retransmitted, and the packet loss of the uplink service data on the base station side is also avoided. Specifically, in the present invention, in order to implement power control on the PHICH, it is required to determine the power of each terminal in each terminal group, and when determining the first power according to the power offset when performing PDCCH scheduling for each terminal, the method includes:

The base station determines the power offset as the first power of the terminal according to a corresponding power offset when the physical uplink shared channel (PUSCH) of the terminal is scheduled.

Determining, by the lookup table, the second power of the PHICH of the terminal relative to the PDCCH, including: determining, according to a DCI format and a CCE aggregation degree of the PUSCH of the terminal, and a simulated PDCCH performance table and a PHICH performance table, The PHICH of the terminal is relative to the second power of the PDCCH.

The DCI format, the CCE convergence degree, and the corresponding power offset adopted by the base station when scheduling the PUSCH of the terminal according to the PDCCH. The power offset is used as the first power of the terminal, and the base station determines the PHICH of the terminal according to the DCI format and the CCE aggregation degree when scheduling the PUSCH of the terminal, and the simulated PDCCH performance table and the PHICH performance table. The power difference of the PDCCH is used as the second power of the terminal.

Determining whether the third power of the terminal is included according to whether the terminal has a quasi-orthogonal interference terminal in the terminal group includes:

Determining whether there is a quasi-orthogonal interference terminal of the terminal in the terminal group where the terminal is located; determining that the third power of the terminal is a set power value when determining that the quasi-orthogonal interference terminal of the terminal exists in the terminal group , is a value greater than 0;

Otherwise, the third power of the terminal is 0.

In the present invention, the base station determines the power offset corresponding to the PUSCH corresponding to the terminal according to the PDCCH, and determines the power offset as the first power of the terminal; the DCI format and the CCE aggregation degree used according to the scheduling of the PUSCH corresponding to the terminal. Determining the PHICH of the terminal relative to the PDCCH by searching the PDCCH performance table obtained by the simulation and the PHICH performance table. The second power; determining whether there is a quasi-orthogonal interference terminal of the terminal in the terminal group where the terminal is located, and when the determination result is yes, determining that the third power of the terminal is a set power value, where is greater than 0 Value, otherwise, the third power of the terminal is 0. The power of the terminal is determined by summing the first power, the second power, and the third power of the terminal, and the power of the terminal group is determined by summing the power of each terminal in the terminal group.

In addition, in the present invention, in order to ensure that the downlink PHICH performance is consistent with the PDCCH performance, thereby improving the accuracy of the power control, when the power of the terminal group is greater than the maximum value of the set PHICH power allocation, the terminal group is The power is equalized to the interval corresponding to the maximum value and the minimum value of the set PHICH power allocation, including:

Determining a difference between a maximum value of the set PHICH power allocation and a power of the terminal group; determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to the In the power of each terminal of the terminal group, the power of the terminal group is uniformized into a range corresponding to the maximum value and the minimum value of the set PHICH power allocation.

When the power of the terminal group is less than the minimum value of the set PHICH power allocation, the power of the terminal group is equalized to the interval corresponding to the maximum value and the minimum value of the set PHICH power allocation, including:

Determining a difference between the power of the terminal group and a minimum value of the set PHICH power allocation; determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to the In the power of each terminal of the terminal group, the power of the terminal group is uniformized into a range corresponding to the maximum value and the minimum value of the set PHICH power allocation.

FIG. 2 is a schematic diagram of a detailed process of PHICH power control according to the present invention. The control process includes the following steps:

S201: The base station schedules the terminal according to the PDCCH for each terminal in the terminal group.

The PUSCH is corresponding to the power offset, and the power offset is determined as the first power of the terminal.

S202: The base station schedules the DCI format and the CCE aggregation degree of the terminal according to the PDCCH, and simulates The PDCCH performance table and the PHICH performance table that are actually acquired, and the lookup table determines the second power of the PHICH of the terminal relative to the PDCCH.

S203: The base station determines whether there is a quasi-orthogonal interference terminal of the terminal in the terminal group where the terminal is located. When the determination result is yes, determining that the third power of the terminal is a set power value is not, the terminal The third power is 0, where is a value greater than zero.

S204: Determine, according to the determined first power, the second power, and the third power of each terminal, the power of each terminal, and determine the power of the terminal group. When the determination result is YES, S206 is performed, otherwise, S207 is performed.

S206: Determine a difference between a maximum value of the set PHICH power allocation and a power of the terminal group, and determine an average value of the difference according to the difference and the number of terminals included in the terminal group, and average the average value. To the power of each terminal of the terminal group, the power of the terminal group is equalized to a range corresponding to the maximum value and the minimum value of the set PHICH power allocation.

S207: Determine whether the power of the terminal group is less than a minimum value of the set PHICH power allocation. When the determination result is yes, proceed to S208; otherwise, no control is performed.

S208: Determine a difference between the power of the terminal group and a minimum value of the set PHICH power allocation, and determine an average value of the difference according to the difference and the number of terminals included in the terminal group, and average the average value. To the power of each terminal of the terminal group, the power of the terminal group is equalized to a range corresponding to the maximum value and the minimum value of the set PHICH power allocation.

In the present invention, the base station schedules the DCI format, the CCE aggregation degree, and the corresponding power offset according to the PDCCH selected by the terminal, and combines the PDCCH performance table and the PHICH performance table obtained through the simulation, and whether each terminal exists in the terminal group. The orthogonal interference terminal determines the power of each terminal and determines the power of the terminal group. According to the poor performance of the PHICH and the PDCCH, the PHICH power control adjustment is performed to ensure that the downlink PHICH performance is consistent with the PDCCH performance, thereby effectively avoiding unnecessary retransmission of terminal data and avoiding uplink service data of the base station side. The phenomenon of packet loss.

FIG. 3 is a schematic diagram of a process of a PHICH power control method in an LTE FDD system according to the present invention, where the control process includes the following steps:

S301: The base station determines, according to the PDCCH, a corresponding power offset of the terminal in the PUSCH of the n-4 subframes, and determines the power offset as the first power of the terminal.

S302: The base station determines a power difference of the PHICH of the terminal relative to the PDCCH according to a DCI format and a CCE aggregation degree used by the terminal when scheduling the PUSCH of the n-4 subframes, and determines the power difference as the terminal of the terminal. Two power.

The PDCCH performance table and the PHICH performance table obtained by simulating the performance of the PDCCH and the PHICH, the block error rate (BLER) target performance of the PHICH is required to be 0.1% in the LTE system, and the BLER target performance of the PDCCH is 1 %, so the reference performance of the look-up table can also be set to 0.1% for the PHICH performance table, and the PDCCH performance table corresponds to 1%, that is, the signal-to-noise power ratio of the PDCCH at the target performance of 1% is found in the PDCCH performance table, and the performance is in the PHICH performance. The table finds the signal-to-noise power ratio of the PHICH at the target performance of 0.1%, and determines the second power of the terminal according to the difference between the two signal noise power ratios.

S303: The base station determines whether there is a quasi-orthogonal interference terminal of the terminal in the terminal group. When the determination result is yes, determining that the third power of the terminal is the set power value ^P c ^{= iW} ; otherwise,

^P c ^{= (kW} , where is a value greater than zero.

S304: Sum the first power, the second power, and the third power of the terminal, and determine the power of the terminal P = P _A + P _B + P _C .

S305: The power terminal number of the terminal group W and each terminal ^), ..., ^^, determining the power of the terminal group dead, the power P ^P of power terminals with each terminal group. , "', ^P N-1 , has the following relationship, 10^ + 10 + "' + 10 ₌ 10 .

S306: Determine whether the power corpse of the terminal group is greater than a maximum PHICH power allocation. The value ^^, when the determination result is YES, proceeds to S307, otherwise, proceeds to S308.

S307: When ^>^^«, adjust the power corpse of the terminal group, so that ^P = ^{P is} old, and the power of each terminal in the terminal group is adjusted (i=0, l, . . . , N-1) Integer) for,

PM

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ )/N

S308: Determine whether the power corpse of the terminal group is smaller than a minimum value of the set PHICH power allocation. When the determination result is YES, proceed to S309; otherwise, no control is performed.

S309: When ^{Ρ < Ρ} Μ/ίν, adjust the power corpse of the terminal group, ^P : Ρ, the adjusted power of each terminal in the terminal group at this time (i=0, l, . . . , N-1 Integer) is

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ ) / N Specifically, in the LTE FDD system, the base station provides the DCI format and CCE aggregation used by the PDCCH scheduling module to schedule the PUSCH of the terminal in n-4 subframes. And the corresponding power offset, and obtain the power difference of the PHICH relative to the PDCCH according to the obtained DCI format and the CCE aggregation degree lookup table. If the terminal group of the terminal has a quasi-orthogonal dry ί eu terminal of the terminal, then ^ : = &^, otherwise ^: ⁼⁰ ^, calculate the power of the terminal: ^Ρ η 2 ^P A ^{+ P} _B ^{+ P} C , calculate the total power of the terminal group according to the power of each terminal in the terminal group j) ip

^{P > P} MAX , then adjust to the corpse P == corpse R, in the terminal group

PMA

^ = 101g 10 ¹⁰ +(10 ¹⁰ -10 ¹⁰ )/N of the adjusted power of each terminal, if

MIN , then adjust to ^ ⁼ , the adjusted power of each terminal in the terminal group,

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ )/N

, where the unit of power is dB _t 4 is a schematic diagram of a PHICH power control process in an LTE TDD system provided by the present invention, where the control process includes the following steps:

S401: The base station determines, according to the PDCCH, a corresponding power offset of the terminal in the PUSCH of the nk _PHICH subframes, and determines the power offset as the first power of the terminal.

The value of k _PHICH is the determined value specified in the LTE protocol.

S402: The base station determines the power difference of the PHICH of the terminal relative to the PDCCH according to the DCI format and the CCE aggregation degree used by the terminal in scheduling the PUSCH of the nk _PHICH subframes, and determines the power difference as the second of the terminal. power.

S403: The base station determines whether there is a quasi-orthogonal interference terminal of the terminal in the terminal group. When the determination result is yes, determining that the third power of the terminal is the set power value ^P c ^{= iW} ; otherwise,

^P c ^{= MB} , where is a value greater than zero.

S404: Sum the first power, the second power, and the third power of the terminal, and determine the power of the terminal P = P _A + P _B + P _C

S405: Determine the power P of the terminal group, the power P of the terminal group, and the power ^{每个 of} each terminal according to the number of terminals in the terminal group and the power of each terminal ^), ..., ^^. ,"', ^Ρ Ν-ι , has the following relationship, io^+io^ + "' + io ₌ io^.

S406: Determine whether the power corpse of the terminal group is greater than a maximum value of the set PHICH power allocation ^4. When the determination result is yes, proceed to S407; otherwise, proceed to S408.

S407: When ^> ^ when «, dead adjusting the power of the terminal group so that the power ^P at this time the terminal group in each terminal adjustment (. I = 0, l, ··, N-1 is an integer) is,

_3_ P

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ )/N

S408: Determine whether the power group of the terminal group is smaller than a minimum PHICH power allocation. If the result of the determination is YES, proceed to S409. Otherwise, no control is performed.

S409: When /ίν, adjust the power of the terminal group, A ^{P is} drawn, and the power of each terminal in the terminal group is adjusted (i=0, l, . . . , an integer of N-1) for

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ ) / N Specifically, in the LTE TDD system, the base station gives the DCI format and CCE aggregation degree used by the PDCCH scheduling module to schedule the PUSCH of the nk _PHICH subframes of the terminal according to the PDCCH scheduling module. And corresponding power offset, and obtaining a power difference of the PHICH relative to the PDCCH according to the obtained DCI format and the CCE aggregation degree lookup table. If the terminal group of the terminal has a quasi-orthogonal interference terminal of the terminal, ^P c ⁼ & , otherwise ^{= 0 ί} , calculate the power of the terminal: ^ρ _η two ^P c , according to the power of each terminal in the terminal group, calculate the total power of the terminal group lO^+lO^ + '.' + lo ^lO ¹ ^ ^ then adjust to the corpse ⁼ , in the terminal group

_3_

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ )/N

The adjusted power of each terminal, if

P<R is adjusted to Ρ^2 ⁼ Ρ, the adjusted power of each terminal in the terminal group,

_3_

^ = 101g 10 ¹⁰ + (10 ¹⁰ -10 ¹⁰ )/N

Where the power is in dB. .

FIG. 5 is a schematic structural diagram of a PHICH power control apparatus according to the present invention, where the control apparatus includes:

The terminal power determining module 51 is configured to determine, according to a power offset when the PDCCH scheduling is performed on the terminal, the first power, and the downlink control information DCI format when performing PDCCH scheduling on the terminal, for each terminal in the terminal group, Channel control element CCE aggregation degree, the lookup table determines the second power of the PHICH of the terminal relative to the PDCCH, according to the terminal at the terminal Whether there is a quasi-orthogonal interference terminal in the group, determining a third power of the terminal, and determining a power of each terminal according to the determined first power, second power, and third power of each terminal;

The terminal group power determining module 52 is configured to determine, according to the determined power of each terminal in the terminal group, the power of the terminal group;

The adjusting module 53 is configured to compare the determined power of the terminal group with a maximum value and a minimum value of the set PHICH power allocation, and normalize the power of the terminal group to a maximum value of the set PHICH power allocation. Within the interval corresponding to the minimum value.

The terminal power determining module 51 is specifically configured to determine the power offset as the first power of the terminal according to a power offset corresponding to scheduling the PUSCH of the terminal.

The terminal power determining module 51 is specifically configured to determine, according to the DCI format and the CCE aggregation degree of the terminal, the PDCCH performance table and the PHICH performance table, and determine the PHICH of the terminal relative to the PDCCH according to the scheduling of the PUSCH of the terminal. Second power.

The terminal power determining module 51 is specifically configured to determine whether a quasi-orthogonal interference terminal of the terminal exists in the terminal group where the terminal is located; and when determining that the quasi-orthogonal interference terminal of the terminal exists in the terminal group, determining the terminal The third power is a set power value, wherein is a value greater than 0; otherwise, the third power of the terminal is 0.

The adjusting module 53 is specifically configured to determine, when the power of the terminal group is greater than a maximum value of the set PHICH power allocation, a difference between a maximum value of the set PHICH power allocation and a power of the terminal group; Determining the average value of the difference by the difference and the number of terminals included in the terminal group; averaging the average value to the power of each terminal of the terminal group, and uniformly equalizing the power of the terminal group to the set Within the interval corresponding to the maximum and minimum values of the PHICH power allocation.

The adjusting module 53 is specifically configured to determine, when the power of the terminal group is less than a minimum value of a set PHICH power allocation, a difference between a power of the terminal group and a minimum value of a set PHICH power allocation; Determining the average value of the difference by the difference and the number of terminals included in the terminal group; averaging the average value to the power of each terminal of the terminal group, and performing the function of the terminal group The rate is uniformized to the interval corresponding to the maximum and minimum values of the set PHICH power allocation.

The present invention provides a PHICH power control method and apparatus. In the control method, the base station determines, for each terminal in the terminal group, the first power and the second power according to the power offset when the terminal performs PDCCH scheduling. Determining a third power of the terminal according to whether there is a quasi-orthogonal interference terminal; determining power of each terminal, and determining power of the terminal group; and normalizing power of the terminal group to a maximum value and a minimum value of the PHICH power allocation Within the interval formed. In the present invention, the PHICH power of each terminal in the terminal group is determined according to the situation in which the terminal performs the PDCCH scheduling, and the PHICH power of the terminal group is determined. Therefore, the downlink PHICH performance and the PDCCH performance can be consistent, thereby effectively avoiding The unnecessary data of the terminal is retransmitted, and the packet loss of the uplink service data on the base station side is also avoided.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A physical hybrid retransmission indication channel (PHICH) power control method, comprising: determining, for each terminal in the terminal group, a first power according to a power offset when performing physical downlink control channel PDCCH scheduling on the terminal; The downlink control information DCI format and the channel control element CCE aggregation degree when the terminal performs PDCCH scheduling, and the table is determined to determine the second power of the PHICH of the terminal relative to the PDCCH; according to whether the terminal has a quasi-orthogonal interference terminal in the terminal group Determining the third power of the terminal;

Determining power of the terminal according to the determined first power, second power, and third power, and determining power of the terminal group;

2. The method according to claim 1, wherein the determining the first power is: the base station determining the power offset according to a corresponding power offset when scheduling the physical uplink shared channel PUSCH of the terminal The first power of the terminal.

3. The method according to claim 1, wherein the method for determining the second power is: a DCI format and a CCE aggregation degree when scheduling a PUSCH of the terminal, and a PDCCH performance table and a PHICH performance table obtained by simulation The lookup table determines the second power of the PHICH of the terminal relative to the PDCCH.

The method according to claim 1, wherein the method for determining the third power is: determining whether a quasi-orthogonal interference terminal of the terminal exists in a terminal group in which the terminal is located, and determining that the terminal group exists When the quasi-orthogonal interference terminal of the terminal determines that the third power of the terminal is a set power value, which is a value greater than 0; otherwise, the third power of the terminal is 0.

The method according to any one of claims 1 to 4, wherein when the power of the terminal group is greater than a maximum value of the set PHICH power allocation, the process of homogenizing the power includes: Determining a difference between a maximum value of the set PHICH power allocation and a power of the terminal group, and determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to The power of each terminal of the terminal group is equalized in the interval formed by the maximum value and the minimum value of the set PHICH power allocation.

The method according to any one of claims 1 to 4, wherein when the power of the terminal group is less than a minimum value of the set PHICH power allocation, the process of homogenizing the power comprises: determining the terminal The difference between the power of the group and the minimum value of the set PHICH power allocation, determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to the terminal group In the power of each terminal, the power of the terminal group is uniformized into a range formed by the maximum value and the minimum value of the set PHICH power allocation.

7. A PHICH power control device, comprising:

The device according to claim 7, wherein the terminal power determining module is configured to determine the power offset as the first power of the terminal according to a corresponding power offset when scheduling the PUSCH of the terminal.

The device according to claim 7, wherein the terminal power determining module is configured to: according to a DCI format and a CCE aggregation degree of the terminal when scheduling the PUSCH of the terminal, and a PDCCH performance table and a PHICH performance table obtained by the simulation. Checking the table to determine the second power of the PHICH of the terminal relative to the PDCCH.

The apparatus according to claim 7, wherein the terminal power determining module is configured to determine whether a quasi-orthogonal interference terminal of the terminal exists in a terminal group in which the terminal is located, and determine that the terminal group exists. When the quasi-orthogonal interference terminal of the terminal determines that the third power of the terminal is a set power value, which is a value greater than 0; otherwise, the third power of the terminal is 0.

The apparatus according to any one of claims 7 to 10, wherein the adjusting module is configured to determine a set PHICH power when a power of the terminal group is greater than a maximum value of a set PHICH power allocation. And a difference between the maximum value of the allocation and the power of the terminal group, determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to each of the terminal groups The power of the terminal is equalized in the interval formed by the maximum and minimum values of the set PHICH power allocation.

The apparatus according to any one of claims 7 to 10, wherein the adjusting module is configured to determine, when the power of the terminal group is less than a minimum value of a set PHICH power allocation, determine the terminal group And a difference between the power and the minimum value of the set PHICH power allocation, determining an average value of the difference according to the difference and the number of terminals included in the terminal group; averaging the average value to each of the terminal groups The power of the terminal is equalized in the interval formed by the maximum and minimum values of the set PHICH power allocation.