CN102869106B - PDCCH self-adapting regulation methods and device - Google Patents
PDCCH self-adapting regulation methods and device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
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- H04W52/16—Deriving transmission power values from another channel
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- H—ELECTRICITY
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- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The present invention relates to a kind of PDCCH self-adapting regulation methods and device, the above method to be：The number of users UE of scheduling is currently needed for according to systemnumAnd default CFI threshold values, adjust automatically PDCCH CFI；The user of above-mentioned needs scheduling is dispatched in respective scheduling window；According to the PDCCH of the user of current scheduling BLER and default power excursion and CCE degree of polymerization adjustable strategies, the current PDCCH transmission powers Po of the above-mentioned user of adjust automatically and the current CCE degree of polymerization；Said apparatus includes CFI adjusting modules, initialization module, scheduler module and adaptive adjusting module.Present invention optimizes the overall performance of LTE system.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of PDCCH (Physical Downlink Control
Channel, Physical Downlink Control Channel) self-adapting regulation method and device.
Background technology
LTE (Long-Term Evolution, Long Term Evolution) is used as 3G (3rd Generation, 3G (Third Generation) Moblie
Technology) technology evolution, improve and enhance 3G aerial access technology, using OFDM (Orthogonal Frequency
Division Multiplexing, OFDM) and MIMO (Multiple Input Multiple Output, it is how defeated
Enter multi output) etc. basic technology standard of the new technology as its wireless network evolution.LTE system can provide higher user peak
Family QoS (Quality of Service, the clothes of Value Data rate, bigger system ovelay range and more preferable cell edge
Business quality) etc..
LTE system carries the upper of user in up-downgoing using SCH (Shared Channel, shared channel) mode
Downlink data transmission, limited running time-frequency resource can be sufficiently utilized using this bearing mode.SCH resource is to pass through
PDCCH is allocated.DCI (Downlink Control Information, descending control letter are carry on PDCCH
Breath), include the resource allocation on one or more UE (User Equipment, user equipment) and other control information.
In LTE, the resource scheduling information of up-downgoing is all carried by PDCCH.In general, in a subframe, can have more
Individual PDCCH.UE needs to demodulate the DCI information in PDCCH first, then descending that category can be demodulated on corresponding resource location
PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) in oneself, it is up can be
Transmitting uplink data is carried out on corresponding resource location.
Due to multiple PDCCH can be included in PDCCH transmission bandwidth simultaneously, in order to more effectively configure PDCCH and its
The running time-frequency resource of its down control channel, LTE define two special PDCCH resource units：REG(Resource
Element Group, resource grains subgroup) and CCE (Control Channel Element, control channel unit).1 REG by
The 4 or 6 adjacent RE (Resource Element, resource particle) in same OFDM symbol are adjacent by 6
In the REG of RE compositions, there are 4 available RE, for two other RE to be referenced signal occupancy, the RE shared by reference signal is not
It can be used by PDCCH REG.One CCE is made up of 9 REG, and DCI is transmitted on one or more continuous CCE, DCI institutes
The CCE numbers of occupancy depend on the down channel environment residing for UE, for the good UE of down channel environment, eNodeB (evolved
Node B, evolved base station) CCE only may need to be distributed, for the UE that down channel environment is poor, eNodeB may need
The CCE of up to 8 is distributed for it.
In LTE, what PDCCH took in a TTI (Transmission Time Interval, Transmission Time Interval)
Symbolic number, it is by PCFICH (Physical Control Format Indicatior Channel, physical control format instruction
Channel) defined in CFI (Control Format Indicatior, control format instruction) determined by.PCFICH always positions
In in first OFDM symbol of subframe.Its specific location-dependent query is in the bandwidth of system and the physical label PCI of cell
(Physical Cell Identity, Physical Cell Identifier).PCFICH sizes are 2bit, and its CFI carried is used to refer to bright
Symbol numbers shared in subframe PDCCH, for the system that bandwidth is larger, the symbolic number that PDCCH takes is 1 to 3, right
In the less system of bandwidth, the symbolic number that PDCCH takes is 2 to 4, this be due to subcarrier on each symbol number compared with
It is few, it is therefore desirable to which that more symbols carry the control information in PDCCH.Done to reduce the mutual of PCFICH between cell
Disturb, PCFICH resource block employs the position skew related to cell physics ID on frequency domain, and is carried out for CFI code words
The scrambler related to cell physics ID.
In order to more reasonably distribute PDCCH resource and PDSCH resources, it is necessary to first determine the PDCCH occupancy in a TTI
Symbolic number, when the number of users for needing to dispatch is few, the symbolic number that PDCCH takes is small, to reserve more PDSCH resources, improves
The overall handling capacity of system；When the number of users for needing to dispatch is more, the symbolic number that PDCCH takes is more, so that system call is more
User, the overall performance of lifting system.
When carrying out PDCCH resource distribution, in order to meet the reliability of subscriber control information transmission, it is necessary to ensure to distribute to
The CCE sizes of user are sufficiently large.In addition, in order that PDCCH carries more users gives unique user distribution, it is necessary to reduce as far as possible
Control resource.Need to consider the transmission power and the CCE degree of polymerization for changing PDCCH under some scenes, such as：Cell side
During edge user PDCCH degradation.
The content of the invention
It is an object of the present invention to provide a kind of PDCCH self-adapting regulation methods and device, to optimize the entirety of LTE system
Performance.
The invention provides a kind of PDCCH self-adapting regulation methods, the above method is：
The number of users UE of scheduling is currently needed for according to systemnumAnd default CFI threshold values, the above-mentioned PDCCH's of adjust automatically
CFI；
The user of above-mentioned needs scheduling is dispatched in respective scheduling window；
According to the PDCCH of the user of current scheduling BLER (Block Error Rate, Block Error Rate) and default power
Skew and CCE degree of polymerization adjustable strategies, the current PDCCH transmission powers Po of the above-mentioned user of adjust automatically and the current CCE degree of polymerization.
Preferably, the above method also comprises the following steps before all steps：
Initialize the CCE degree of polymerization and PDCCH transmission powers of said system.
Preferably, the CCE degree of polymerization of above-mentioned initialization system and PDCCH transmission power steps specifically include：
Obtain user type and CQI (Channel Quality Indicator, letter that said system is currently needed for scheduling
Road quality instruction) information；
According to the user type got, the user for judging to be currently needed for scheduling is edge customer or central user；
If the user for being currently needed for scheduling is edge customer, the initial CCE degree of polymerization for making said system is the first reference
The CCE degree of polymerization, initial p DCCH power excursions PowerOffset0Offset for the first reference power；
If being currently needed for the user-center user of scheduling, judge whether above-mentioned CQI is more than or equal to default CQI thresholdings
Value CQIth, if so, then making the initial CCE initial polymerizations degree of said system refer to the CCE degree of polymerization, initial p DCCH power for second
Offset PowerOffset0Offset for the second reference power；Otherwise, the initial CCE degree of polymerization of said system is made to refer to work(for the 3rd
Rate is offset, initial p DCCH power excursions PowerOffset0Offset for the 3rd reference power；
Calculate the reference emission power P of said system and above-mentioned initial p DCCH power excursions PowerOffset0Sum, obtain
To the initial p DCCH transmission powers of said system.
Preferably, the above-mentioned number of users UE that scheduling is currently needed for according to systemnumAnd default CFI threshold values, adjust automatically
Control format indicates that CFI steps are specially：
Acquisition system is currently needed for the number of users UE of schedulingnum；
According to the above-mentioned number of users UE for being currently needed for schedulingnum, calculate the CCE sums CCE needed for current schedulingall；
Judge above-mentioned CCE sums CCEallWhether default first CFI threshold values CFI1 is less thanth, if so, then making current CFI
For the first CFI values；Otherwise,
Judge above-mentioned CCE sums CCEallWhether default 2nd CFI threshold values CFI2 is less thanth, if so, then making current CFI
For the 2nd CFI values；Otherwise, it is the 3rd CFI values to make current CFI.
Preferably, the above-mentioned user steps that above-mentioned needs scheduling is dispatched in respective scheduling window further comprise：
The user for counting current scheduling dispatches number Schd scheduled in window at itcnt；
Calculate BLERs of the PDCCH of above-mentioned user in above-mentioned scheduling window；
Judge above-mentioned BLER size.
Preferably, if above-mentioned BLER is less than or equal to first threshold, the PDCCH's of the above-mentioned user according to current scheduling
BLER and default power excursion and CCE degree of polymerization adjustable strategies, the current PDCCH of the above-mentioned user of adjust automatically penetrate power P o and
Currently CCE degree of polymerization steps are specially：
If the number Schd that above-mentioned user is scheduledcntMore than or equal to above-mentioned scheduling times threshold value Cntth, then by above-mentioned use
The current PDCCH transmission powers Po at family reduces a default first power excursion PowerOffset1, obtain above-mentioned user's
The quasi- transmission powers of PDCCH；
If total power excursion PowerOffset of the above-mentioned user under current scheduling window absolute value is more than or equal to default
Power drift threshold value PowerOffsetthAnd the current CCE degree of polymerization of above-mentioned user is more than 1, then above-mentioned current CCE is gathered
Right reduction one-level, the quasi- degree of polymerization of CCE of above-mentioned user is obtained, while the quasi- transmission powers of the PDCCH of above-mentioned user are increased by one
Default second power excursion PowerOffset2；
Update above-mentioned current PDCCH transmission powers Po and the above-mentioned current CCE degree of polymerization.
Preferably, if above-mentioned BLER is more than Second Threshold, the PDCCH of the above-mentioned user according to current scheduling BLER and
Default power excursion and CCE degree of polymerization adjustable strategies, the current PDCCH transmission powers Po of the above-mentioned user of adjust automatically and current
CCE degree of polymerization steps are specially：
If the current CCE degree of polymerization of above-mentioned user is less than 8, increases the above-mentioned current CCE degree of polymerization step by step, obtain above-mentioned use
The quasi- degree of polymerization of CCE at family；If there are available CCE positions in the reserved area of system and the above-mentioned current CCE degree of polymerization increases two
More than level, then the current PDCCH transmission powers Po of above-mentioned user is reduced into a default 3rd power excursion PowerOffset3,
The quasi- transmission powers of PDCCH of above-mentioned user are obtained, and distribute a CCE positions, update the current PDCCH transmission powers of above-mentioned user
Po, the current CCE degree of polymerization and current CCE positions；
If the current CCE degree of polymerization of above-mentioned user is increased in 8 and the reserved area of system without available CCE positions,
Judge whether there are available CCE positions in the reserved area of system using the current CCE degree of polymerization, if being in the reserved area of system
It is no to have available CCE positions and have transmission power, then by above-mentioned current PDCCH transmission powers Po increases by one the default 4th
Power excursion PowerOffset4, so as to get above-mentioned user the quasi- degree of polymerization of PDCCH be less than or equal to system emission maximum work(
Rate, and a CCE positions are distributed, update current PDCCH transmission powers Po, the current CCE degree of polymerization and current CCE positions；
If during using the above-mentioned current CCE degree of polymerization, without available CCE positions in the reserved area of system, but above-mentioned PDCCH
The Downlink Control Information DCI of carrying can be distributed in CCE resources and above-mentioned public domain in public domain available CCE positions,
Then distribute a CCE positions；If the DCI of above-mentioned PDCCH carryings can not be distributed in CCE resources or above-mentioned public domain in public domain
Without available CCE positions, then this adjustment is abandoned.
Preferably, in the above method,
The above-mentioned current PDCCH transmission power Po of above-mentioned renewal, refer to above-mentioned current with the quasi- transmission power renewals of above-mentioned PDCCH
PDCCH transmission powers Po；
The above-mentioned current CCE degree of polymerization of renewal, refer to the above-mentioned current CCE degree of polymerization of the quasi- degree of polymerization renewals of above-mentioned CCE；
The above-mentioned current CCE positions of renewal, refer to the current CCE positions of CCE location updatings with above-mentioned distribution.
Preferably, if above-mentioned BLER, which is more than, first threshold and is less than or equal to Second Threshold, keep that above-mentioned user's is current
PDCCH transmission powers Po and the current CCE degree of polymerization are constant.
Preferably, the above method further comprises：
After above-mentioned adjustment terminates, according to the current PDCCH transmission powers Po of the above-mentioned user after renewal and/or currently
The CCE degree of polymerization, scheduling window is reset for above-mentioned user.
Invention further provides a kind of PDCCH self-adapting adjusting apparatus, said apparatus includes CFI adjusting modules, just
Beginningization module, scheduler module and adaptive adjusting module,
Above-mentioned CFI adjusting modules, for being currently needed for the number of users UE of scheduling according to systemnumWith default CFI thresholdings
Value, the above-mentioned PDCCH of adjust automatically CFI；
Above-mentioned scheduler module, for according to respective current PDCCH transmission powers Po and the current CCE degree of polymerization, respective
Scheduling window in scheduling above-mentioned needs scheduling user；
Above-mentioned adaptive adjusting module, for the PDCCH of the user according to above-mentioned scheduler module current scheduling BLER and
Default power excursion and CCE degree of polymerization adjustable strategies, the user's of the above-mentioned scheduler module current scheduling of adjust automatically is current
PDCCH transmission powers Po and the current CCE degree of polymerization.
Preferably, above-mentioned initialization module, it is additionally operable to the number of users UE that acquisition system is currently needed for schedulingnum, calculate current
CCE sums CCE needed for schedulingall, judge above-mentioned CCE sums CCEallWhether default first CFI threshold values CFI1 is less thanth,
And in above-mentioned CCE sums CCEallLess than above-mentioned first CFI threshold values CFI1thWhen, it is the first CFI values to make current CFI；Above-mentioned
CCE sums CCEallMore than or equal to above-mentioned first CFI threshold values CFI1thWhen, judge above-mentioned CCE sums CCEallWhether it is less than default
The 2nd CFI threshold values CFI2th, and in above-mentioned CCE sums CCEallLess than above-mentioned 2nd CFI threshold values CFI2thWhen, order is current
CFI is the 2nd CFI values；In above-mentioned CCE sums CCEallMore than or equal to above-mentioned 2nd CFI threshold values CFI2thWhen, make the current CFI be
3rd CFI values；
Above-mentioned initialization module, the user type and CQI information of scheduling are currently needed for for obtaining said system, according to obtaining
The user type got, the user for judging to be currently needed for scheduling is edge customer or central user, and is being currently needed for dispatching
User when being edge customer, make the initial CCE degree of polymerization of said system refer to the CCE degree of polymerization, initial p DCCH power for first
Offset PowerOffset0Offset for the first reference power, when being currently needed for the user-center user of scheduling, judge above-mentioned
Whether CQI is more than or equal to default CQI threshold values CQIth, and it is more than or equal to default CQI threshold values CQI in above-mentioned CQIthWhen,
The initial CCE initial polymerizations degree of said system is made to refer to the CCE degree of polymerization, initial p DCCH power excursions for second
PowerOffset0Offset for the second reference power, be less than default CQI threshold values CQI in above-mentioned CQIthWhen, make said system
The initial CCE degree of polymerization for the 3rd refer to the CCE degree of polymerization, initial p DCCH power excursions PowerOffset0Work(is referred to for the 3rd
Rate is offset；And calculate the reference emission power P of said system and above-mentioned initial p DCCH power excursions PowerOffset0Sum,
Obtain the initial p DCCH transmission powers of said system；
Above-mentioned scheduler module, the user for counting current scheduling dispatch the number Schd being scheduled in window at itcnt, meter
Count stating BLERs of the PDCCH of user in above-mentioned scheduling window in, and judge above-mentioned BLER size, and will determine that result is sent
To above-mentioned adaptive scheduling module.
Preferably, above-mentioned adaptive adjusting module, for being above-mentioned user's in the judged result of above-mentioned scheduler module
When PDCCH BLER is less than or equal to first threshold, the number Schd that above-mentioned user is scheduled is judgedcntWhether it is more than or equal to default
Scheduling times threshold value Cntth, in the number Schd that above-mentioned user is scheduledcntMore than or equal to above-mentioned scheduling times threshold value
CntthWhen, the current PDCCH transmission powers Po of above-mentioned user is reduced into a default first power excursion PowerOffset1, obtain
To the quasi- transmission powers of PDCCH of above-mentioned user, and total power excursion in above-mentioned user under current scheduling window
PowerOffset absolute value is more than or equal to default power drift threshold value PowerOffsetthAnd above-mentioned user's is current
When the CCE degree of polymerization is more than 1, the above-mentioned current CCE degree of polymerization is reduced into one-level, the quasi- degree of polymerization of CCE of above-mentioned user is obtained, simultaneously will
The quasi- transmission powers of PDCCH of above-mentioned user increase by a default second power excursion PowerOffset2, and update above-mentioned work as
Preceding PDCCH transmission powers Po and the above-mentioned current CCE degree of polymerization.
Preferably, above-mentioned adaptive adjusting module, for being above-mentioned user's in the judged result of above-mentioned scheduler module
When PDCCH BLER is more than the current CCE degree of polymerization of Second Threshold and above-mentioned user less than 8, increases above-mentioned current CCE step by step and gather
It is right, obtain the quasi- degree of polymerization of CCE of above-mentioned user；And have in the degree of polymerization quasi- using above-mentioned CCE in the reserved area of system can
CCE positions and when the above-mentioned current CCE degree of polymerization is increased more than two-stage, by the current PDCCH transmission powers of above-mentioned user
Po reduces a default 3rd power excursion PowerOffset3, a CCE positions are distributed, update the current PDCCH of above-mentioned user
Transmission power Po, the current CCE degree of polymerization and current CCE positions；
Above-mentioned user the current CCE degree of polymerization increase to 8 and system reserved area in without available CCE positions when,
Judge whether there are available CCE positions in the reserved area of system using the current CCE degree of polymerization, and in the reserved area of system
When whether having available CCE positions and having transmission power, by above-mentioned current PDCCH transmission powers Po increases by one default the
Four power excursion PowerOffset4, so as to get above-mentioned user the quasi- degree of polymerization of PDCCH be less than or equal to system emission maximum
Power, and a CCE positions are distributed, update current PDCCH transmission powers Po, the current CCE degree of polymerization and current CCE positions；And
Without available CCE positions in the reserved area of system when using the above-mentioned current CCE degree of polymerization, but the DCI of above-mentioned PDCCH carryings
When there can be available CCE positions in public domain distribution CCE resources and above-mentioned public domain, a CCE positions are distributed.
The number of users that the present invention dispatches as needed, it is determined that the CCE number of resources needed, and determined according to CCE number of resources
CFI, guarantee system obtain optimum performance between maximum number of user and maximum throughput；And according to the PDCCH situations of user, it is
The control information of user chooses the suitable CCE degree of polymerization, ensure that the reliability of PDCCH transmission.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the preferred embodiment flow chart of PDCCH self-adapting regulation methods of the present invention；
Fig. 2 is the particular flow sheet of step S100 in Fig. 1；
Fig. 3 is the particular flow sheet of step S200 in Fig. 1；
Fig. 4 is particular flow sheets of the step S700 when BLER is less than or equal to 0.5% in Fig. 1；
Fig. 5 is particular flow sheets of the step S700 when BLER is more than 1% in Fig. 1；
Fig. 6 is the preferred embodiment theory diagram of PDCCH self-adapting adjusting apparatus of the present invention.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, being the preferred embodiment flow chart of PDCCH self-adapting regulation methods of the present invention, the present embodiment includes
Following steps：
Step S100：The initialization system CCE degree of polymerization and PDCCH transmission powers；
This step implements flow referring to Fig. 2.
Step S200：The number of users UE of scheduling is currently needed for according to systemnum, adjust automatically PDCCH CFI；
This step is to adjust the OFDM symbol number that PDCCH takes.
This step implements flow referring to Fig. 3.
Step S300：The user of above-mentioned needs scheduling is dispatched in respective scheduling window；
The scheduling window of user is set according to respective current PDCCH transmission powers Po and the current CCE degree of polymerization；Scheduling
The length of window is set according to 2 power, for example the length for dispatching window can be arranged to 1024 subframes, and user scheduled one
Secondary, then it dispatches window forward slip once, scheduling times SchdcntIncrease is once；
After the current PDCCH transmission powers Po of user and/or the current CCE degree of polymerization update, then dispatch window and can also be weighed
Put.
Step S400：The user for counting current scheduling dispatches number Schd scheduled in window at itcnt；
After window replacement is dispatched, above-mentioned scheduled number SchdcntAgain count；
Step S500：The PDCCH for calculating above-mentioned user dispatches the BLER in window at it；
BLER shows the performance of the PDCCH within a period of time, and this step can be by counting DTX (Discontinuous
It is Transmission, discontinuous to send) number obtain PDCCH BLER.
Step S600：Judge above-mentioned BLER size；
In this step, the size of BLER more above-mentioned first and first threshold, when above-mentioned BLER is more than first threshold, then
More above-mentioned BLER and Second Threshold size.
Step S700：It is above-mentioned according to above-mentioned BLER and default power excursion and CCE degree of polymerization adjustable strategies, adjust automatically
The current PDCCH transmission powers Po of the user of current scheduling and the current CCE degree of polymerization.
In the present embodiment, first threshold=0.5%, Second Threshold=1% are taken；Therefore in this step, BLER is less than or equal to
Specific implementation flow when 0.5% is referring to Fig. 4；Specific implementation flow when BLER is more than 1% is referring to Fig. 5；BLER is more than 0.5%
And during less than or equal to 1%, keep the current PDCCH transmission powers Po of above-mentioned user and the current CCE degree of polymerization constant.Above-mentioned first
Threshold value, the value of Second Threshold can determine according to specific application scenarios, that is to say, that in other embodiments, above-mentioned first
Threshold value, Second Threshold can be other values.
As shown in Fig. 2 it is the particular flow sheet of step S100 in Fig. 1；The present embodiment takes the first reference CCE degree of polymerization=4,
First reference power skew=0db, second refers to CCE degree of polymerization=2, the second reference powers skew=- 1db, and the 3rd refers to CCE
The reference power skew of degree of polymerization=2, the three=0db, comprises the following steps：
Step S101：Obtain user type and CQI that said system is currently needed for scheduling；
Step S102：According to the user type got, judge the user for being currently needed for scheduling be edge customer or in
Heart user, if the user for being currently needed for scheduling is edge customer, perform step S103；During if the user for being currently needed for scheduling is
Heart user, then perform step S104；
Step S103：The initial CCE degree of polymerization for making said system is 4, initial p DCCH power excursions PowerOffset0For
0db, perform step S107；
Step S104：Judge whether above-mentioned CQI is more than or equal to default CQI threshold values CQIth, if so, then performing step
S105；Otherwise, step S106 is performed；
Step S105：The initial CCE initial polymerizations degree for making said system is 2, initial p DCCH power excursions
PowerOffset0For -1db, step S107 is performed；
Step S106：The initial CCE degree of polymerization of said system is 2, initial p DCCH power excursions PowerOffset0For
0db；
Step S107：Calculate the reference emission power P of said system and above-mentioned initial p DCCH power excursions
PowerOffset0Sum, obtain the initial p DCCH transmission powers of said system.
This step calculates：P+PowerOffset0。
As shown in figure 3, it is the particular flow sheet of step S200 in Fig. 1；The present embodiment takes the CFI of the first CFI values=1, the two
Value=2, the 3rd CFI value=3；This implementation comprises the following steps：
Step S201：Acquisition system is currently needed for the number of users UE of schedulingnum；
Step S202：The CCE degree of polymerization that number of users and each user according to being dispatched in default statistic window use, calculate
The average CCE degree of polymerization CCE that the user of scheduling uses in above-mentioned statistic windowave；
Step S203：Calculate the above-mentioned number of users UE for being currently needed for schedulingnumWith above-mentioned average CCE degree of polymerization CCEaveMultiply
Product, obtains the CCE sums CCE needed for current schedulingall；
This step calculates：CCEall=UEnum×CCEave。
Step S204：Judge above-mentioned CCE sums CCEallWhether default first CFI threshold values CFI1 is less thanth, if so, then
Perform step S205；Otherwise, step S206 is performed；
Step S205：It is 1 to make current CFI, is terminated；
Step S206：Judge above-mentioned CCE sums CCEallWhether default 2nd CFI threshold values CFI2 is less thanth, if so, then
Perform step S207；Otherwise, step S208 is performed；
Step S207：It is 2 to make current CFI, is terminated
Step S208：It is 3 to make current CFI, is terminated.
As shown in figure 4, it is particular flow sheets of the step S700 when BLER is less than or equal to 0.5%, including following step in Fig. 1
Suddenly：
Step S701：Judge the number Schd that above-mentioned user is scheduledcntWhether default scheduling times thresholding is more than or equal to
Value Cntth, if so, then performing step S702, otherwise, continue executing with this step；
Step S702：The current PDCCH transmission powers Po of above-mentioned user is reduced into by default first power excursion
PowerOffset1, that is, calculate Po-PowerOffset1Value, obtain the quasi- transmission powers of PDCCH of above-mentioned user；
Step S703：Calculate total power excursion PowerOffset of the above-mentioned user under current scheduling window；
In this step, if current scheduling window is first scheduling window of above-mentioned user, above-mentioned total power excursion
PowerOffset is calculated by equation below：
PowerOffset=PowerOffset0-PowerOffset1
If current scheduling window is non-first scheduling window of above-mentioned user, above-mentioned total power excursion PowerOffset
Calculated by equation below：
PowerOffset=PowerOffset1
Step S704：Judge whether above-mentioned total power excursion PowerOffset absolute value is more than or equal to default work(
Rate skew threshold value PowerOffsetth, if so, then performing step S705, otherwise, perform step S710；
Step S705：Judge whether the current CCE degree of polymerization of above-mentioned user is more than 1, if so, then performing step S706；It is no
Then, step S710 is performed；
Step S706：The current CCE degree of polymerization of above-mentioned user is reduced into one-level, obtains the quasi- degree of polymerization of above-mentioned CCE；
Step S707：The quasi- transmission powers of above-mentioned PDCCH are increased into by a default second power excursion PowerOffset2；
Step S708：Empty total power excursion PowerOffset；
Step S709：It is accurate with above-mentioned CCE with the above-mentioned current PDCCH transmission power Po of the quasi- transmission power renewals of above-mentioned PDCCH
The above-mentioned current CCE degree of polymerization of degree of polymerization renewal, this adjustment terminate；
Step S710：With the above-mentioned PDCCH above-mentioned current PDCCH transmission power Po of quasi- transmission power renewal, this adjustment knot
Beam.
As shown in figure 5, being particular flow sheets of the step S700 when BLER is more than 1% in Fig. 1, comprise the following steps：
Step S701 '：Make the quasi- degree of polymerization of CCE of above-mentioned user be equal to the current CCE degree of polymerization, make CCE adjustment numbers I=0；
Step S702 '：Judge whether the quasi- degree of polymerization of above-mentioned CCE is less than 8, if so, then performing step S703 ', otherwise, also
It is that the quasi- degree of polymerization of above-mentioned CCE is equal to 8, performs step S707 '；
Step S703 '：By the quasi- degree of polymerization increase one-levels of above-mentioned CCE, and make I=I+1；
Step S704 '：According to the quasi- degree of polymerization of above-mentioned CCE, judge whether there are available CCE positions in the reserved area of system
Put, if so, then performing step S705 '；Otherwise, step S712 ' is performed；
Step S705 '：Judge whether above-mentioned CCE adjustment numbers I is more than or equal to 2, if so, then execution step S706 ', no
Then, step S710 ' is performed；
In this step, if the quasi- degree of polymerization of CCE increases to 2 from 1, either increase to 4 from 2 or increase to 8 from 4, then I=
1, if the quasi- degree of polymerization of CCE increases to 2 from 1, then increases to 4 from 2, or 4 are increased to from 2, then 8 are increased to from 4, then I=2, if
The quasi- degree of polymerization of CCE increases to 2 from 1, then increases to 4 from 2, and increases to 8 from 4, then I=3.
Step S706 '：The current PDCCH transmission powers Po of above-mentioned user is reduced into default 3rd power excursion
PowerOffset3, obtain the quasi- transmission powers of PDCCH of above-mentioned user；
Step S707 '：According to the above-mentioned current CCE degree of polymerization, judge whether there are available CCE positions in the reserved area of system
Put, if so, then performing step S708 '；Otherwise, step S712 ' is performed；
Step S708 '：Judge whether system has transmission power, that is, judge whether current PDCCH transmission powers Po is small
In the maximum transmission power Power of systemmax, if so, then performing step S709 ', otherwise, perform step S710 '；
Step S709 '：Above-mentioned current PDCCH transmission powers Po is increased into by default 4th power excursion
PowerOffset4, obtain the quasi- tranmitting frequencies of PDCCH of above-mentioned user；
This step performs：Quasi- transmission power=the Po+ of PDCCH | PowerOffset4|；
It is worth noting that, the quasi- transmission powers of PDCCH that this step calculates should be less than the emission maximum work(equal to system
Rate PowermaxIf, that is to say, that Po+ | PowerOffset4|>Powermax, then in this step, the quasi- transmission powers of PDCCH=
Powermax。
Step S710 '：Distribute a CCE positions；
Step S711 '：Above-mentioned current PDCCH transmission powers Po, the current CCE degree of polymerization and current CCE positions are updated, this
Secondary adjustment terminates；
Step S712 '：The DCI information carried according to PDCCH, judge whether that CCE resources can be distributed in public domain, if
It is then to perform step S713 ', otherwise, performs step S715 '；
Step S713 '：Judge whether there are available CCE positions in the public domain of system, if so, then performing step
S714 ', otherwise, perform step S715 '；
Step S714 '：Distribute a CCE positions；
Step S715 '：Abandon this adjustment.
As shown in fig. 6, be the theory diagram of the preferred embodiment of PDCCH self-adapting adjusting apparatus of the present invention, the present embodiment
Including CFI adjusting modules 10, initialization module 20, scheduler module 30 and adaptive adjusting module 40,
CFI adjusting modules 10, for being currently needed for the number of users UE of scheduling according to systemnumAnd default CFI threshold values,
Adjust automatically PDCCH CFI；Specially：Acquisition system is currently needed for the number of users UE of schedulingnum；According in default statistic window
The CCE degree of polymerization that the number of users of scheduling and each user use, calculate the average CCE that the user of scheduling in above-mentioned statistic window uses
Degree of polymerization CCEave；Calculate the above-mentioned number of users UE for being currently needed for schedulingnumWith above-mentioned average CCE degree of polymerization CCEaveProduct, obtain
To the CCE sums CCE needed for current schedulingall, judge CCE sums CCEallWhether default first CFI threshold values are less than
CFI1th, and in CCE sums CCEallLess than above-mentioned first CFI threshold values CFI1thWhen, current CFI value is adjusted to first
CFI values；In CCE sums CCEallMore than or equal to above-mentioned first CFI threshold values CFI1thWhen, judge CCE sums CCEallWhether it is less than
Default 2nd CFI threshold values CFI2th, and in CCE sums CCEallLess than above-mentioned 2nd CFI threshold values CFI2thWhen, will be current
CFI value is adjusted to the 2nd CFI values；In CCE sums CCEallMore than or equal to above-mentioned 2nd CFI threshold values CFI2thWhen, will be current
CFI value is adjusted to the 3rd CFI values；
Initialization module 20, for initializing the CCE degree of polymerization and PDCCH transmission powers of said system；Specially：Obtain
Said system is currently needed for the user type and CQI information of scheduling, and according to the user type got, judgement is currently needed for dispatching
User be edge customer or central user, and when being currently needed for the user of scheduling and being edge customer, make said system
The initial CCE degree of polymerization is first with reference to the CCE degree of polymerization, initial p DCCH power excursions PowerOffset0For the first reference power
Skew, when being currently needed for the user-center user of scheduling, judge whether above-mentioned CQI is more than or equal to default CQI threshold values
CQIth, and it is more than or equal to above-mentioned CQI threshold values CQI in above-mentioned CQIthWhen, the initial CCE initial polymerizations degree for making said system is
Second refers to the CCE degree of polymerization, initial p DCCH power excursions PowerOffset0Offset for the second reference power, it is small in above-mentioned CQI
In above-mentioned CQI threshold values CQIthWhen, make the initial CCE degree of polymerization of said system refer to the CCE degree of polymerization, initial p DCCH for the 3rd
Power excursion PowerOffset0Offset for the 3rd reference power；And calculate the reference emission power P of said system with it is above-mentioned just
Beginning PDCCH power excursion PowerOffset0Sum, obtain the initial p DCCH transmission powers of said system；
Above-mentioned scheduler module 30, for dispatching the user of above-mentioned needs scheduling in respective scheduling window, and statistics is worked as
The user of preceding scheduling dispatches number Schd scheduled in window at itcnt, the PDCCH of above-mentioned user is calculated in above-mentioned scheduling window
BLER, and judge above-mentioned BLER size, will determine that result is sent to adaptive adjusting module 40；
Adaptive adjusting module 40, BLER and default power excursion and CCE for the PDCCH according to the user received
Degree of polymerization adjustable strategies, the automatic user for the current scheduling of scheduler module 30 adjust current PDCCH transmission powers Po and current CCE
The degree of polymerization；Specially：
When the judged result of scheduler module 30 is less than or equal to first threshold for the PDCCH of above-mentioned user BLER, judge
The number Schd that above-mentioned user is scheduledcntWhether default scheduling times threshold value Cnt is more than or equal toth, and in above-mentioned user's quilt
The number Schd of schedulingcntMore than or equal to above-mentioned scheduling times threshold value CntthWhen, the current PDCCH of above-mentioned user is launched into work(
Rate Po reduces by a default first power excursion PowerOffset1, obtain the quasi- transmission powers of PDCCH of above-mentioned user；In calculating
State total power excursion PowerOffset of the user under current scheduling window；Judge above-mentioned total power excursion PowerOffset
Absolute value whether be more than or equal to default power drift threshold value PowerOffsetth；And in above-mentioned total power excursion
PowerOffset absolute value is more than or equal to above-mentioned power drift threshold PowerOffsetthWhen, judge that above-mentioned user's is current
Whether the CCE degree of polymerization is 1, above-mentioned current with the quasi- transmission power renewals of above-mentioned PDCCH when the above-mentioned current CCE degree of polymerization is 1
PDCCH transmission powers Po；When the above-mentioned current CCE degree of polymerization is not 1, the current CCE degree of polymerization of above-mentioned user is reduced into one-level,
The quasi- degree of polymerization of above-mentioned CCE is obtained, and the quasi- transmission powers of above-mentioned PDCCH are increased into by default second power excursion
PowerOffset2, with the above-mentioned PDCCH above-mentioned current PDCCH transmission power Po of quasi- transmission power renewal, it is polymerize with above-mentioned CCE is accurate
The above-mentioned current CCE degree of polymerization of degree renewal；It is less than above-mentioned power excursion in above-mentioned total power excursion PowerOffset absolute value
Thresholding PowerOffsetthWhen, with the above-mentioned current PDCCH transmission powers Po of the quasi- transmission power renewals of above-mentioned PDCCH；
When the judged result of scheduler module 30 is more than Second Threshold for the PDCCH of above-mentioned user BLER, above-mentioned use is made
The quasi- degree of polymerization of CCE at family is equal to the current CCE degree of polymerization, and makes CCE adjustment numbers I=0；Whether judge the quasi- degree of polymerization of above-mentioned CCE
Less than 8；When the quasi- degree of polymerization of above-mentioned CCE is less than 8, the quasi- degree of polymerization of above-mentioned CCE is increased into one-level, makes I=I+1, and according to above-mentioned
The quasi- degree of polymerization of CCE, judge whether there are available CCE positions in the reserved area of system, the quasi- degree of polymerization of above-mentioned CCE be less than 8 and
When in the reserved area of system without available CCE positions, continue to increase the quasi- degree of polymerization of above-mentioned CCE；In the reserved area of system
When there are available CCE positions, judge whether above-mentioned CCE adjustment numbers I is more than or equal to 2, be more than in above-mentioned CCE adjustment numbers I etc.
When 2, the current PDCCH transmission powers Po of above-mentioned user is reduced into a default 3rd power excursion PowerOffset3, obtain
To the quasi- transmission powers of PDCCH of above-mentioned user, and a CCE positions are distributed, it is above-mentioned current with the quasi- transmission power renewals of above-mentioned PDCCH
PDCCH transmission power Po, with the above-mentioned current CCE degree of polymerization of above-mentioned CCE quasi- degree of polymerization renewal, with the CCE positions of above-mentioned distribution more
New current CCE positions；
When the quasi- degree of polymerization of above-mentioned CCE is equal to 8, judged using the above-mentioned current CCE degree of polymerization be in the reserved area of system
It is no to have available CCE positions, judge whether system has transmission power, there are available CCE positions in the reserved area of system
When putting and when having transmission power, above-mentioned current PDCCH transmission powers Po is increased into by default 4th power excursion
PowerOffset4, so as to get the quasi- transmission powers of PDCCH be less than or equal to system maximum transmission power Powermax, and distribute
One CCE positions, above-mentioned current PDCCH transmission power Po are updated with the quasi- transmission powers of above-mentioned PDCCH, with the quasi- degree of polymerization of above-mentioned CCE
The above-mentioned current CCE degree of polymerization is updated, with the current CCE positions of the CCE location updatings of above-mentioned distribution；Have in the reserved area of system
During during available CCE positions but without transmission power, a CCE positions are only distributed, and it is above-mentioned with the quasi- degree of polymerization renewals of above-mentioned CCE
The current CCE degree of polymerization, with the current CCE positions of the CCE location updatings of above-mentioned distribution；Without available in the reserved area of system
During CCE positions, whether can in public domain distribute CCE resource, in above-mentioned PDCCH carryings if judging the DCI of above-mentioned PDCCH carryings
DCI can be distributed in public domain when having available CCE positions in CCE resources and the public domain, distribute a CCE positions,
When the DCI of above-mentioned PDCCH carryings can not be distributed in CCE resources or the public domain in public domain without available CCE positions,
Abandon this adjustment, that is to say, that keep the current PDCCH transmission powers Po of the user and the current CCE degree of polymerization constant.
The preferred embodiments of the present invention have shown and described in described above, but as previously described, it should be understood that the present invention is not
Form disclosed herein is confined to, is not to be taken as the exclusion to other embodiment, and available for various other combinations, modification
And environment, and can be carried out in the scope of the invention is set forth herein by the technology or knowledge of above-mentioned teaching or association area
Change., then all should be in institute of the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In attached scope of the claims.
Claims (13)
1. a kind of physical downlink control channel PDCCH self-adapting regulation method, it is characterised in that methods described is：
The number of users UE of scheduling is currently needed for according to systemnumAnd default control format instruction CFI threshold values, adjust automatically institute
State PDCCH CFI；
The user for needing to dispatch is dispatched in the respective scheduling window of user；
Gathered according to the PDCCH of the user of current scheduling block error rate BLER and default power excursion with control channel unit CCE
Right adjustable strategies, the current PDCCH transmission powers Po of user described in adjust automatically and the current CCE degree of polymerization；
Wherein, the number of users UE that scheduling is currently needed for according to systemnumAnd default CFI threshold values, adjust automatically control lattice
Formula indicates that CFI steps are specially：
Acquisition system is currently needed for the number of users UE of schedulingnum；
According to the number of users UE for being currently needed for schedulingnum, calculate the CCE sums CCE needed for current schedulingall；
Judge the CCE sums CCEallWhether default first CFI threshold values CFI1 is less thanth, if so, then making current CFI as the
One CFI values；Otherwise,
Judge the CCE sums CCEallWhether default 2nd CFI threshold values CFI2 is less thanth, if so, then making current CFI as the
Two CFI values；Otherwise, it is the 3rd CFI values to make current CFI；
Wherein, the first CFI values<The 2nd CFI values<The 3rd CFI values.
2. according to the method for claim 1, it is characterised in that methods described is before all steps, in addition to following step
Suddenly：
Initialize the CCE degree of polymerization and PDCCH transmission powers of the system.
3. according to the method for claim 2, it is characterised in that the CCE degree of polymerization and the PDCCH transmitting of the initialization system
Power step specifically includes：
Obtain user type and channel quality indicator CQI information that the system is currently needed for scheduling；
According to the user type got, the user for judging to be currently needed for scheduling is edge customer or central user；
If the user for being currently needed for scheduling is edge customer, the initial CCE degree of polymerization of the system is made to gather for first with reference to CCE
It is right, initial p DCCH power excursions PowerOffset0Offset for the first reference power；
If being currently needed for the user-center user of scheduling, judge whether the CQI is more than or equal to default CQI threshold values
CQIth, if so, then making the initial CCE initial polymerizations degree of the system refer to the CCE degree of polymerization for second, initial p DCCH power is inclined
Move PowerOffset0Offset for the second reference power；Otherwise, the initial CCE degree of polymerization of the system is made to refer to CCE for the 3rd
The degree of polymerization, initial p DCCH power excursions PowerOffset0Offset for the 3rd reference power；
Calculate the reference emission power P of the system and the initial p DCCH power excursions PowerOffset0Sum, obtain institute
State the initial p DCCH transmission powers of system；
Wherein, described second the CCE degree of polymerization is referred to reference to the CCE degree of polymerization≤described first with reference to the CCE degree of polymerization≤described 3rd；
The second reference power skew≤the 3rd reference power skew≤first reference power skew.
4. according to the method for claim 1, it is characterised in that described dispatched in respective scheduling window described needs to dispatch
User steps further comprise：
The user for counting current scheduling dispatches number Schd scheduled in window at itcnt；
Calculate BLERs of the PDCCH of the user in the scheduling window；
Judge the size of the BLER.
5. the method according to claim 1 or 4, it is characterised in that described if the BLER is less than or equal to first threshold
According to the PDCCH of the user of current scheduling BLER and default power excursion and CCE degree of polymerization adjustable strategies, adjust automatically institute
The current PDCCH transmission powers Po and current CCE degree of polymerization step for stating user be specially：
If the number Schd that the user is scheduledcntMore than or equal to scheduling times threshold value Cntth, then by the current of the user
PDCCH transmission powers Po reduces a default first power excursion PowerOffset1, obtain the quasi- transmittings of PDCCH of the user
Power；
If total power excursion PowerOffset of the user under current scheduling window absolute value is more than or equal to default work(
Rate skew threshold value PowerOffsetthAnd the current CCE degree of polymerization of the user is more than 1, then by the current CCE degree of polymerization
One-level is reduced, obtains the quasi- degree of polymerization of CCE of the user, while the quasi- transmission power increases by one of the PDCCH of the user are preset
The second power excursion PowerOffset2；
Update the current PDCCH transmission powers Po and the current CCE degree of polymerization.
6. the method according to claim 1 or 4, it is characterised in that if the BLER is more than Second Threshold, the basis
The PDCCH of the user of current scheduling BLER and default power excursion and CCE degree of polymerization adjustable strategies, use described in adjust automatically
The current PDCCH transmission powers Po at family and current CCE degree of polymerization step are specially：
If the current CCE degree of polymerization of the user is less than 8, increases the current CCE degree of polymerization step by step, obtain the user's
The quasi- degree of polymerization of CCE；If have available CCE positions in the reserved area of system and the current CCE degree of polymerization increase two-stage with
On, then the current PDCCH transmission powers Po of the user is reduced into a default 3rd power excursion PowerOffset3, obtain
The quasi- transmission powers of PDCCH of the user, and distribute a CCE positions, update the user current PDCCH transmission powers Po,
The current CCE degree of polymerization and current CCE positions；
If the current CCE degree of polymerization of the user increases to 8, judged using the current CCE degree of polymerization in the reserved area of system
Whether available CCE position is had, if there are available CCE positions in the reserved area of system and having transmission power, by institute
Stating current PDCCH transmission powers Po increases by a default 4th power excursion PowerOffset4, so as to get the user
The quasi- transmission powers of PDCCH are less than or equal to the maximum transmission power Power of systemmax, and a CCE positions are distributed, renewal is current
PDCCH transmission powers Po, the current CCE degree of polymerization and current CCE positions；
If the current CCE degree of polymerization increases to 8, without available CCE positions in the reserved area of system, but the PDCCH
The Downlink Control Information DCI of carrying can be distributed in CCE resources and the public domain in public domain available CCE positions,
A CCE positions are then distributed, if the DCI of PDCCH carryings can not be distributed in CCE resources or the public domain in public domain
Without available CCE positions, then this adjustment is abandoned.
7. according to the method for claim 6, it is characterised in that in methods described,
The renewal current PDCCH transmission power Po, refer to described current with the quasi- transmission power renewals of the PDCCH
PDCCH transmission powers Po；
The current CCE degree of polymerization of renewal, refer to the quasi- degree of polymerization renewals of the CCE current CCE degree of polymerization；
The current CCE positions of renewal, refer to the current CCE positions of CCE location updatings with the distribution.
8. the method according to claim 1 or 4, it is characterised in that if the BLER is more than first threshold and is less than or equal to
Second Threshold, then keep the current PDCCH transmission powers Po of the user and the current CCE degree of polymerization constant.
9. according to the method for claim 1, it is characterised in that methods described further comprises：
After the adjustment terminates, gathered according to the current PDCCH transmission powers Po of the user after renewal and/or current CCE
It is right, reset scheduling window for the user.
10. a kind of physical downlink control channel PDCCH self-adapting adjusting apparatus, it is characterised in that described device includes control lattice
Formula instruction CFI adjusting modules, initialization module, scheduler module and adaptive adjusting module,
The CFI adjusting modules, for being currently needed for the number of users UE of scheduling according to systemnumWith default CFI threshold values, from
Dynamic adjustment PDCCH CFI；
The scheduler module, for being polymerize according to respective current PDCCH transmission powers Po and current control channel unit CCE
Degree, the user for needing to dispatch is dispatched in respective scheduling window；
The adaptive adjusting module, the block error rate BLER for the PDCCH of the user according to the scheduler module current scheduling
And default power excursion and CCE degree of polymerization adjustable strategies, the user's of scheduler module current scheduling is current described in adjust automatically
PDCCH transmission powers Po and the current CCE degree of polymerization；
The CFI adjusting modules, it is additionally operable to the number of users UE that acquisition system is currently needed for schedulingnum, calculate needed for current scheduling
CCE sums CCEall, judge the CCE sums CCEallWhether default first CFI threshold values CFI1 is less thanth, and in the CCE
Total CCEallLess than the first CFI threshold values CFI1thWhen, it is the first CFI values to make current CFI；In the CCE sums CCEall
More than or equal to the first CFI threshold values CFI1thWhen, judge the CCE sums CCEallWhether default 2nd CFI doors are less than
Limit value CFI2th, and in the CCE sums CCEallLess than the 2nd CFI threshold values CFI2thWhen, it is second to make current CFI
CFI values；In the CCE sums CCEallMore than or equal to the 2nd CFI threshold values CFI2thWhen, it is the 3rd CFI to make current CFI
Value；
Wherein, the first CFI values<The 2nd CFI values<The 3rd CFI values.
11. device according to claim 10, it is characterised in that
The initialization module, the user type and CQI information of scheduling are currently needed for for obtaining the system, according to getting
User type, the user for judging to be currently needed for scheduling is edge customer or central user, and in the use for being currently needed for scheduling
When family is edge customer, the initial CCE degree of polymerization of the system is made to refer to the CCE degree of polymerization, initial p DCCH power excursions for first
PowerOffset0Offset for the first reference power, when being currently needed for the user-center user of scheduling, judge that the CQI is
It is no to be more than or equal to default CQI threshold values CQIth, and it is more than or equal to default CQI threshold values CQI in the CQIthWhen, make institute
The initial CCE initial polymerizations degree for stating system refers to the CCE degree of polymerization, initial p DCCH power excursions PowerOffset for second0For
Second reference power is offset, and is less than default CQI threshold values CQI in the CQIthWhen, make the initial CCE degree of polymerization of the system
The CCE degree of polymerization, initial p DCCH power excursions PowerOffset are referred to for the 3rd0Offset for the 3rd reference power；And calculate institute
State the reference emission power P of system and the initial p DCCH power excursions PowerOffset0Sum, obtain the system just
Beginning PDCCH transmission power；
The scheduler module, the user for counting current scheduling dispatch the number Schd being scheduled in window at itcnt, calculate institute
BLERs of the PDCCH of user in the scheduling window is stated, and judges the size of the BLER, and will determine that result is sent to institute
State adaptive adjusting module；
Wherein, described second the CCE degree of polymerization is referred to reference to the CCE degree of polymerization≤described first with reference to the CCE degree of polymerization≤described 3rd；
The second reference power skew≤the 3rd reference power skew≤first reference power skew.
12. the device according to claim 10 or 11, it is characterised in that the adaptive adjusting module, for described
When the judged result of scheduler module is less than or equal to first threshold for the PDCCH of user BLER, judge that the user is adjusted
The number Schd of degreecntWhether default scheduling times threshold value Cnt is more than or equal toth, in the number that the user is scheduled
SchdcntMore than or equal to the scheduling times threshold value CntthWhen, the current PDCCH transmission powers Po of the user is reduced by one
Default first power excursion PowerOffset1, the quasi- transmission powers of PDCCH of the user are obtained, and working as in the user
The absolute value of total power excursion PowerOffset under preceding scheduling window is more than or equal to default power drift threshold value
PowerOffsetthAnd the current CCE degree of polymerization of the user is when being more than 1, will the current CCE degree of polymerization reduction one-level, obtain
The quasi- degree of polymerization of CCE of the user, while the quasi- transmission powers of the PDCCH of the user are increased into by default second power excursion
PowerOffset2, and the renewal current PDCCH transmission powers Po and the current CCE degree of polymerization.
13. the device according to claim 10 or 11, it is characterised in that the adaptive adjusting module, for described
The judged result of scheduler module is more than Second Threshold and the current CCE polymerizations of the user for the PDCCH of user BLER
When degree is less than 8, increases the current CCE degree of polymerization step by step, obtain the quasi- degree of polymerization of CCE of the user；And using the CCE
There are available CCE positions during the quasi- degree of polymerization in the reserved area of system and when the current CCE degree of polymerization is increased more than two-stage,
The current PDCCH transmission powers Po of the user is reduced into a default 3rd power excursion PowerOffset3, distribute a CCE
Position, update current PDCCH transmission powers Po, the current CCE degree of polymerization and the current CCE positions of the user；
When the current CCE degree of polymerization of the user increases to 8, judged using the current CCE degree of polymerization in the reserved area of system
, will when whether having available CCE positions, and having available CCE positions in the reserved area of system and have transmission power
The current PDCCH transmission powers Po increases by a default 4th power excursion PowerOffset4, so as to get the user
The quasi- transmission powers of PDCCH be less than or equal to system maximum transmission power Powermax, and a CCE positions are distributed, renewal is current
PDCCH transmission powers Po, the current CCE degree of polymerization and current CCE positions, and system when using the current CCE degree of polymerization
Reserved area in without available CCE positions, but the DCI of PDCCH carryings can distribute CCE resources and described in public domain
When there are available CCE positions in public domain, a CCE positions are distributed.
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| PCT/CN2012/071633 WO2012155590A1 (en) | 2011-07-07 | 2012-02-24 | Method and apparatus for adaptively adjusting pdcch |
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| CN109217997B (en) * | 2017-07-07 | 2021-05-25 | 普天信息技术有限公司 | Method and device for dynamically adjusting CFI in subframe |
| CN109922500A (en) * | 2017-12-12 | 2019-06-21 | 成都鼎桥通信技术有限公司 | Channel capacity control method and device |
| CN111385899B (en) * | 2018-12-28 | 2023-03-14 | 中兴通讯股份有限公司 | Resource scheduling method and device, network equipment and readable storage medium |
| CN111628852B (en) * | 2019-02-27 | 2021-11-19 | 大唐移动通信设备有限公司 | Resource allocation method and device |
| CN113824543A (en) * | 2021-09-07 | 2021-12-21 | 深圳金信诺高新技术股份有限公司 | Method, base station and storage medium for adaptively adjusting PDCCH polymerization degree |
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