CN105517171B - It is a kind of in LTE-A network dispatch LTE terminal method and base station - Google Patents
It is a kind of in LTE-A network dispatch LTE terminal method and base station Download PDFInfo
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Abstract
The method that the invention discloses a kind of in LTE-A network dispatches LTE terminal, this method comprises: base station used MCS index value when determining to terminal distribution transfer resource, and the MCS index value is compared with preset threshold value；When judging that the MCS index value is greater than preset first threshold value, the terminal is dispatched in the subframe for be not configured CSI-RS；When judging that the MCS index value is less than preset second threshold value, the dispatch terminal in CSI-RS subframe；When judging that the MCS index value is more than or equal to second threshold value and is less than or equal to first threshold value, the dispatch terminal in CSI-RS subframe, while optimizing hybrid automatic repeat-request (HARQ) process flow.The present invention further simultaneously discloses a kind of base station that LTE terminal is dispatched in LTE-A network.
Description
Technical field
The present invention relates to mobile communication technology field more particularly to a kind of methods that LTE terminal is dispatched in LTE-A network
The base station and.
Background technique
Currently, in the standard of LTE (LTE-A) network of evolution, it may be assumed that in 10 standard (abbreviation R10) of Release and
An important reference signal is introduced in subsequent standard, it may be assumed that channel status indicates reference signal (Channel State
Indication RS, CSI-RS), to carry out the measurement of channel information for terminal.The CSI-RS is in the position of frequency domain as schemed
Shown in 1；In time domain, CSI-RS can be configured to different periods, such as 5ms, 10ms, 40ms etc. as needed.For being configured with
The subframe of CSI-RS is known as CSI-RS subframe.
After LTE-A network is configured with CSI-RS, LTE terminal in CSI-RS subframe, i.e. R8/R9 terminal (meet R8 and/
Or the terminal of R9 standard) do not know that the presence of CSI-RS is led so the CSI-RS is accidentally treated as data receiver by R8/R9 terminal
The bit error rate is caused to improve, message transmission rate decline.R8/R9 terminal capabilities is influenced from CSI-RS simulation result it can be seen that
When modulation is with coding strategy (MCS) index value=10, the signal-to-noise ratio (SNR) of 10% Block Error Rate (BLER) has raised 1.5dB, MCS
When index value=14, the SNR of 10%BLER raises 4dB.
In order to solve the problems, such as that above-mentioned terminal data transmission is impaired, the method that the scheduling that is staggered can be used, it may be assumed that be not configured
R8/R9 terminal is dispatched in the subframe of CSI-RS.But this method can waste downlink subframe, especially account in a network in R10 terminal
In the case where not high, there are many downlink subframe quantity wasted.In addition, the method that MCS index value depression of order can also be used, it may be assumed that
R8/R9 terminal is dispatched in CSI-RS subframe, while reducing MCS index value.But since the fluctuation of wireless channel is larger,
To the influence degree of R8/R9 terminal, it is difficult to predict therefore the order that MCS index value reduces also is difficult to determine CSI-RS, so should
The practical effect of method is poor.
Summary of the invention
To solve existing technical problem, the embodiment of the present invention provides one kind and dispatches LTE terminal in LTE-A network
Method and base station.
The method that the embodiment of the invention provides a kind of to dispatch LTE terminal in the LTE network of evolution, this method comprises:
Base station used MCS index value when determining to terminal distribution transfer resource, and by the MCS index value and default
Threshold value be compared；
When judging that the MCS index value is greater than preset first threshold value, institute is dispatched in the subframe for be not configured CSI-RS
State terminal；When judging that the MCS index value is less than preset second threshold value, the terminal is dispatched in CSI-RS subframe；Sentence
When the MCS index value that breaks is more than or equal to second threshold value and is less than or equal to first threshold value, in CSI-RS subframe
The upper scheduling terminal, while optimizing hybrid automatic repeat-request (HARQ) process flow.
Wherein, used MCS index value when the base station is determined to terminal distribution transfer resource, comprising:
Base station indicates (CQI) message, and the error code Block Error Rate that junction link is adaptive according to the channel quality that terminal reports
Information, and/or transmission rate information are estimated if it is the terminal distribution transfer resource, it will the MCS index value of use.
It is wherein, described that the terminal is dispatched in CSI-RS subframe, comprising:
Scheduling and the CSI-RS subframe synchronic gap of the base station to the terminal.
Wherein, the optimization HARQ process flow, comprising:
The first biography of the HARQ of dispatch terminal in CSI-RS subframe, in the retransmission processes of the same HARQ process of the terminal
In, terminal described in the subframe scheduling of CSI-RS is not configured in selection.
Preferably, this method further include:
According to CSI-RS, to the influence degree of terminal capabilities, two MCS index value thresholdings: the first thresholding are accordingly arranged in base station
Value and the second threshold value, the first threshold value counterpart terminal performance are not influenced by CSI-RS, and second threshold value is corresponding
For terminal capabilities because CSI-RS influence can not work normally, first threshold value is greater than second threshold value.
Wherein, the terminal are as follows: meet the terminal of R8 and/or R9 standard in LTE.
The embodiment of the invention also provides a kind of in the LTE network of evolution dispatches the base station of LTE terminal, base station packet
It includes: determining module, judgment module and processing module；Wherein,
The determining module, used MCS index value when for determining to terminal distribution transfer resource；
The judgment module, for the fixed MCS index value to be compared with preset threshold value, according to not
Same comparison result triggers the processing module and executes corresponding operating；
CSI- is being not configured when for determining that the MCS index value is greater than preset first threshold value in the processing module
The terminal is dispatched in the subframe of RS；When determining that the MCS index value is less than preset second threshold value, in CSI-RS subframe
Dispatch the terminal；Determine that the MCS index value is more than or equal to second threshold value and is less than or equal to first threshold value
When, the terminal is dispatched in CSI-RS subframe, while optimizing HARQ process flow.
Preferably, the base station further include: setup module, for the influence degree according to CSI-RS to terminal capabilities, phase
Two MCS index value thresholdings: the first threshold value and the second threshold value should be set, the first threshold value counterpart terminal performance not by
The influence of CSI-RS, the second threshold value counterpart terminal performance influence cisco unity malfunction, first thresholding because of CSI-RS
Value is greater than second threshold value.
Wherein, used MCS index value when the determining module is determined to terminal distribution transfer resource, comprising:
The CQI message that determining module is reported according to terminal, and the adaptive error code Block Error Rate information of junction link, and/or
Transmission rate information is estimated if it is the terminal distribution transfer resource, it will the MCS index value of use.
Wherein, the processing module optimizes HARQ process flow, comprising:
The first biography of processing module HARQ of dispatch terminal in CSI-RS subframe, in the weight of the same HARQ process of the terminal
During biography, terminal described in the subframe scheduling of CSI-RS is not configured in selection.
The method provided in an embodiment of the present invention that LTE terminal is dispatched in LTE-A network and base station, the true directional terminals in base station
Used MCS index value when allocation of transmission resources, and the MCS index value is compared with preset threshold value；Judgement
When the MCS index value is greater than preset first threshold value, the terminal is dispatched in the subframe for be not configured CSI-RS；Judge institute
When stating MCS index value less than preset second threshold value, the terminal is dispatched in CSI-RS subframe；Judge the MCS index
When value is more than or equal to second threshold value and is less than or equal to first threshold value, the end is dispatched in CSI-RS subframe
End, while optimizing hybrid automatic repeat-request (HARQ) process flow.The embodiment of the present invention is by considering different MCS index values
R8/R9 terminal capabilities is influenced difference by CSI-RS, rational management is carried out to terminal, so that CSI-RS subframe can be by MCS index
It is worth lower thresholding, i.e. the second threshold value R8/R9 terminal below makes full use of, and to make full use of interface-free resources, guarantees system
Performance.Meanwhile the terminal between two thresholdings is in for MCS index value, since it is influenced to be not easy simple boundary by CSI-RS
It is fixed, therefore equally dispatched in CSI-RS subframe, and using optimization HARQ process flow, in the base for guaranteeing utilization rate of air interface resource
On plinth, the transmission performance of data is improved.
Detailed description of the invention
In attached drawing (it is not necessarily drawn to scale), similar appended drawing reference can describe phase in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is position distribution schematic diagram of the CSI-RS in frequency domain；
Fig. 2 is the method implementation process schematic diagram for dispatching LTE terminal described in the embodiment of the present invention in LTE-A network；
Fig. 3 is the architecture of base station schematic diagram for dispatching LTE terminal described in the embodiment of the present invention in LTE-A network.
Specific embodiment
In the embodiment of the present invention, base station used MCS index value when determining to terminal distribution transfer resource, and by institute
MCS index value is stated to be compared with preset threshold value；When judging that the MCS index value is greater than preset first threshold value,
It is not configured in the subframe of CSI-RS and dispatches the terminal；When judging that the MCS index value is less than preset second threshold value,
The terminal is dispatched in CSI-RS subframe；Judge that the MCS index value is more than or equal to second threshold value and is less than or equal to institute
When stating the first threshold value, the terminal is dispatched in CSI-RS subframe, while optimizing HARQ process flow.
In the embodiment of the present invention, the terminal is to meet the terminal of R8 and/or R9 standard in LTE.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 2 is the method implementation process schematic diagram for dispatching LTE terminal described in the embodiment of the present invention in LTE-A network, such as
Shown in Fig. 2, comprising:
Step 201: base station used MCS index value when determining to terminal distribution transfer resource；
Specifically, base station indicates (CQI) message, and the error code that junction link is adaptive according to the channel quality that terminal reports
The information such as Block Error Rate information, and/or transmission rate are estimated if it is the terminal distribution transfer resource, it will the MCS index of use
Value.
Here, the method for the estimation is the prior art, and and will not be described here in detail.
Step 202: the MCS index value being compared with preset threshold value, if the MCS index value is greater than in advance
If the first threshold value, then follow the steps 203；If the MCS index value is less than preset second threshold value, then follow the steps
204；If the MCS index value is more than or equal to second threshold value, is less than or equal to first threshold value, then follow the steps
205；
Here, base station judges whether to dispatch the terminal in CSI-RS subframe according to the determining MCS index value: tool
Body, if the MCS index value is greater than preset first threshold value, then follow the steps 203；If the MCS index value is small
In preset second threshold value, 204 are thened follow the steps；If the MCS index value is more than or equal to second threshold value, is less than
Equal to first threshold value, 205 are thened follow the steps.
Step 203: the terminal is dispatched in the subframe for be not configured CSI-RS；
Step 204: the terminal is dispatched in CSI-RS subframe, it may be assumed that base station can be with the CSI- to the scheduling of terminal
The synchronic gap of RS subframe；
Step 205: dispatching the terminal in CSI-RS subframe, while optimizing HARQ process flow；
Specifically, base station can dispatch the terminal in CSI-RS subframe, at the same time, base station is needed to HARQ processing stream
Journey optimizes, it may be assumed that base station is dispatched in CSI-RS subframe above-mentioned to be more than or equal to the second threshold value and be less than or equal to the first thresholding
When the terminal of value, only the first transmission of HARQ is dispatched in CSI-RS subframe, in the re-transmission of the same HARQ process of the terminal
In the process, the subframe scheduling terminal of CSI-RS is not configured in selection, to guarantee the success rate retransmitted.
The embodiment of the present invention is right by considering that the R8/R9 terminal capabilities of different MCS index values is influenced difference by CSI-RS
Terminal carries out rational management, so that CSI-RS subframe can be by the lower thresholding of MCS index value, i.e. the second threshold value R8/ below
R9 terminal makes full use of, and to make full use of interface-free resources, guarantees system performance.Meanwhile two thresholdings are in for MCS index value
Between terminal equally dispatched in CSI-RS subframe, and use since it is influenced to be not easy simply to define by CSI-RS
Optimization HARQ process flow improves the transmission performance of data on the basis of guaranteeing utilization rate of air interface resource.
From existing it is found that influence of the CSI-RS for R8/R9 terminal capabilities has following rule, it may be assumed that under high MCS index value
It is affected, is influenced under low MCS index value smaller.
Therefore, in one embodiment of the invention, this method further include: base station is according to CSI-RS to the shadow of terminal capabilities
The degree of sound, is arranged two MCS index value thresholdings: the first threshold value accordingly, and counterpart terminal performance is not influenced and the by CSI-RS
Two threshold values, for counterpart terminal performance because CSI-RS influence can not work normally, the first threshold value is greater than the second threshold value.In this way,
In dispatch terminal, three kinds of MCS index value interval ranges according to setting use different dispatching methods for base station.
Here, can empirically be worth, such as: the simulation result setting described first that terminal capabilities is influenced according to CSI-RS
Threshold value and the second threshold value, settable: the first threshold value of MCS index value is that the second threshold value of 15, MCS index value is 9.
The embodiment of the invention also provides a kind of in the LTE network of evolution dispatches the base station of LTE terminal, as shown in figure 3,
The base station 30 comprises determining that module 301, judgment module 302 and processing module 303；Wherein,
The determining module 301, used MCS index value when for determining to terminal distribution transfer resource；
The judgment module 302, for the fixed MCS index value to be compared with preset threshold value, root
The processing module 303, which is triggered, according to different comparison results executes corresponding operating；
Here, judgment module 302 judges whether that scheduling should in CSI-RS subframe according to the determining MCS index value
Terminal.
The processing module 303 can be realized by base station dispatcher, for determining that the MCS index value is greater than preset first
When threshold value, the terminal is dispatched in the subframe for be not configured CSI-RS；Determine that the MCS index value is less than preset second
When limit value, the terminal is dispatched in CSI-RS subframe；Determine the MCS index value be more than or equal to second threshold value and
When less than or equal to first threshold value, the terminal is dispatched in CSI-RS subframe, while optimizing HARQ process flow.
Specifically, not matching if processing module 303 determines that the MCS index value is greater than preset first threshold value
It sets and dispatches the terminal in the subframe of CSI-RS；If processing module 303 determines that the MCS index value is less than preset second
Limit value then dispatches the terminal in CSI-RS subframe, it may be assumed that can be with the synchronic gap of CSI-RS subframe to the scheduling of terminal；
If processing module 303 determines that the MCS index value is more than or equal to second threshold value, is less than or equal to first thresholding
Value, then dispatch the terminal in CSI-RS subframe, at the same time, need to optimize HARQ process flow, it may be assumed that HARQ's
Journey is just transmitted through using CSI-RS subframe, the subframe of CSI-RS is not configured in the retransmission processes selection of HARQ, to guarantee the success retransmitted
Rate.
Wherein, the determining module 301 and judgment module 302 can be by the central processing unit (Central in base station 30
Processing Unit, CPU), digital signal processor (Digital Signal Processor, DSP) or programmable logic
Array (Field-Programmable Gate Array, FPGA) is realized.
Preferably, in an embodiment of the invention, the base station 30 further include: setup module 304, for according to CSI-
Two MCS index value thresholdings: the first threshold value and the second threshold value are accordingly arranged to the influence degree of terminal capabilities in RS, described
First threshold value counterpart terminal performance is not influenced by CSI-RS, and the second threshold value counterpart terminal performance is influenced because of CSI-RS
It can not work normally, first threshold value is greater than second threshold value.
Wherein, used MCS index value when the determining module is determined to terminal distribution transfer resource, comprising:
The CQI message that determining module is reported according to terminal, and the error code Block Error Rate, and/or transmission that junction link is adaptive
The information such as rate are estimated if it is the terminal distribution transfer resource, it will the MCS index value of use.
Wherein, the processing module optimizes HARQ process flow, comprising:
The first biography of processing module HARQ of dispatch terminal in CSI-RS subframe, in the weight of the same HARQ process of the terminal
During biography, the subframe scheduling terminal of CSI-RS is not configured in selection.
Base station of the embodiment of the present invention is by considering that the R8/R9 terminal capabilities of different MCS index values is influenced not by CSI-RS
Together, rational management is carried out to terminal, so that CSI-RS subframe can be by the lower thresholding of MCS index value, i.e. below the second threshold value
R8/R9 terminal make full use of, to make full use of interface-free resources, guarantee system performance.Meanwhile two are in for MCS index value
Terminal between a thresholding is equally dispatched in CSI-RS subframe since it is influenced to be not easy simply to define by CSI-RS,
And the transmission performance of data is improved on the basis of guaranteeing utilization rate of air interface resource using optimization HARQ process flow.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (8)
1. a kind of method for dispatching LTE terminal in the LTE network of evolution, which is characterized in that this method comprises:
Base station used modulation and coding strategy MCS index value when determining to terminal distribution transfer resource, and by the MCS rope
Draw value to be compared with preset threshold value；
When judging that the MCS index value is greater than preset first threshold value, channel status instruction reference signal CSI- is being not configured
The terminal is dispatched in the subframe of RS；When judging that the MCS index value is less than preset second threshold value, in CSI-RS subframe
Dispatch the terminal；Judge that the MCS index value is more than or equal to second threshold value and is less than or equal to first threshold value
When, the terminal is dispatched in CSI-RS subframe, while in CSI-RS subframe dispatch terminal hybrid automatic repeat-request
The first biography of HARQ, in the retransmission processes of the same HARQ process of the terminal, selection is not configured described in the subframe scheduling of CSI-RS
Terminal.
2. the method according to claim 1, wherein the base station is adopted when determining to terminal distribution transfer resource
MCS index value, comprising:
The channel quality indicator (CQI) message that base station is reported according to terminal, and the adaptive error code Block Error Rate information of junction link,
And/or transmission rate information, it estimates if it is the terminal distribution transfer resource, it will the MCS index value of use.
3. the method according to claim 1, wherein described dispatch the terminal in CSI-RS subframe, comprising:
Scheduling and the CSI-RS subframe synchronic gap of the base station to the terminal.
4. method according to any one of claim 1-3, which is characterized in that this method further include:
To the influence degree of terminal capabilities, two MCS index value thresholdings are accordingly arranged according to CSI-RS in base station: the first threshold value and
Second threshold value, the first threshold value counterpart terminal performance are not influenced by CSI-RS, the second threshold value counterpart terminal
For performance because CSI-RS influence can not work normally, first threshold value is greater than second threshold value.
5. method according to any one of claim 1-3, which is characterized in that the terminal are as follows: meet in LTE R8 and/
Or the terminal of R9 standard.
6. it is a kind of in the LTE network of evolution dispatch LTE terminal base station, which is characterized in that the base station comprise determining that module,
Judgment module and processing module；Wherein,
The determining module, used MCS index value when for determining to terminal distribution transfer resource；
The judgment module, for the fixed MCS index value to be compared with preset threshold value, according to different
Comparison result triggers the processing module and executes corresponding operating；
The processing module is being not configured CSI-RS's when for determining that the MCS index value is greater than preset first threshold value
The terminal is dispatched in subframe；When determining that the MCS index value is less than preset second threshold value, dispatched in CSI-RS subframe
The terminal；When determining that the MCS index value is more than or equal to second threshold value and is less than or equal to first threshold value,
The terminal is dispatched in CSI-RS subframe, while the hybrid automatic repeat-request HARQ of dispatch terminal in CSI-RS subframe
It just passes, in the retransmission processes of the same HARQ process of the terminal, terminal described in the subframe scheduling of CSI-RS is not configured in selection.
7. base station according to claim 6, which is characterized in that the base station further include: setup module, for according to CSI-
Two MCS index value thresholdings: the first threshold value and the second threshold value are accordingly arranged to the influence degree of terminal capabilities in RS, described
First threshold value counterpart terminal performance is not influenced by CSI-RS, and the second threshold value counterpart terminal performance is influenced because of CSI-RS
Cisco unity malfunction, first threshold value are greater than second threshold value.
8. base station according to claim 6 or 7, which is characterized in that the determining module is determined to transmit to terminal distribution and be provided
Used MCS index value when source, comprising:
The CQI message that determining module is reported according to terminal, and the error code Block Error Rate information, and/or transmission that junction link is adaptive
Rate information is estimated if it is the terminal distribution transfer resource, it will the MCS index value of use.
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| CN108307403A (en) * | 2016-09-21 | 2018-07-20 | 大唐移动通信设备有限公司 | A kind of processing method and processing device of information transmission state exception |
| CN109429336B (en) * | 2017-08-23 | 2022-10-04 | 中国电信股份有限公司 | Resource scheduling method, device and base station |
| CN112436922B (en) * | 2020-11-25 | 2022-05-20 | Oppo（重庆）智能科技有限公司 | MCS scheduling method, terminal equipment, network equipment and storage medium |
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| CN101635608A (en) * | 2009-09-02 | 2010-01-27 | 北京邮电大学 | Method and device for selecting MCS and wireless communication system |
| EP2220805A1 (en) * | 2007-12-13 | 2010-08-25 | QUALCOMM Incorporated | Coding block based harq combining for ofdma systems |
| CN103378950A (en) * | 2012-04-20 | 2013-10-30 | 华为技术有限公司 | Channel state information feedback method and device |
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| RU2527753C2 (en) * | 2010-03-22 | 2014-09-10 | Самсунг Электроникс Ко., Лтд. | Multiplexing control and data information from user equipment in physical data channel |
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| CN101207461A (en) * | 2007-12-10 | 2008-06-25 | 华为技术有限公司 | Method and apparatus for self-adapting regulation of threshold value |
| EP2220805A1 (en) * | 2007-12-13 | 2010-08-25 | QUALCOMM Incorporated | Coding block based harq combining for ofdma systems |
| CN101635608A (en) * | 2009-09-02 | 2010-01-27 | 北京邮电大学 | Method and device for selecting MCS and wireless communication system |
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