CN103716888B - Control channel resource allocation method and base station - Google Patents
Control channel resource allocation method and base station Download PDFInfo
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- CN103716888B CN103716888B CN201210380551.6A CN201210380551A CN103716888B CN 103716888 B CN103716888 B CN 103716888B CN 201210380551 A CN201210380551 A CN 201210380551A CN 103716888 B CN103716888 B CN 103716888B
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Abstract
The embodiments of the invention disclose a control channel resource allocation method and a base station, for realizing control allocation of time domain resources of a PDCCH and improving the capacity of a communication system. The method comprises the following steps: calculating the utilization rate of an uplink authorization CCE within a preset time period after uplink and downlink resources are scheduled by use of a CCE on the PDCCH; determining which one is greater in term of value from the utilization rate of the uplink authorization CCE and an uplink high threshold; if the utilization rate of the uplink authorization CCE is greater than the uplink high threshold, obtaining the sign digits of OFDM (orthogonal frequency division multiplexing) occupied by the PDCCH; determining whether the sign digits of the OFDM reach the maximum value; and when a first adjusting condition is met, lowering the proportion occupied by a downlink authorization CCE, wherein the proportion occupied by the downlink authorization CCE refers to a ratio of the number of CCEs for downlink scheduling to the total number of CEEs mapped to the PDCCH, and the first adjusting condition is that the utilization rate of the uplink authorization CCE is greater than the uplink high threshold and the sign digits of the OFDM do not reach the maximum value.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of distribution method and the base station of control channel resource.
Background technology
In Long Term Evolution（LTE, Long Term Evolution）In system, descending control area is used for bearing downlink control
Signaling processed, generally takes up front 1 ~ 3 OFDM (OFDM, Orthogonal Frequency of a descending sub frame
Division Multiplexing) symbol, other symbols distribute to downlink traffic channel transmission downlink service data.Descending control
Region processed includes Physical Control Format Indicator Channel（PCFICH, Physical Control Format Indicator
Channel）, physical mixed automatic repeat request indicate channel（PHICH, Physical Hybrid-ARQ Indicator
Channel）And Physical Downlink Control Channel（PDCCH, Physical Downlink Control Channel）.Each is descending
PCFICH in subframe carries control format configured information, for indicating present sub-frame in the OFDM symbol number that takes of control area
Mesh；PHICH is used to carry the hybrid automatic repeat-request for Uplink Shared Channel packet（HARQ, Hybrid
Automatic Repeat Request）Response；PDCCH is used for bearing downlink control information（DCI, Downlink Control
Element）, including the schedule information for downlink and uplink data transfer and uplink power control information etc..
It is resource element groups that PCFICH and PHICH channels in descending control area carry out the ultimate unit of esource impact
（REG, Resource Element Group）, REG includes 4 continuous Resource Units（RE, Resource
Element）.It is control channel unit that PDCCH channels in descending control area carry out the ultimate unit of esource impact（CCE,
Control Channel Element）, CCE is a logical block, and 1 CCE includes 9 continuous REG.Hypothesis system point
The quantity for having matched somebody with somebody residue REG after PCFICH and PHICH is NREG, then in system the numbering of the CCE of PDCCH from the beginning of 0, to NCCE-
1, whereinIt is several because the resource shared by PCFICH and PHICH channels is compared with the resource shared by PDCCH
Can ignore, therefore the OFDM symbol number shared by the resource of control area is mainly determined by PDCCH channel resources.
Knowable to LTE protocol, down control channel and data channel share downlink resource, in each subframe front 1,2 or
3 symbols of person can be used to transmit Downlink Control Information, and wherein down control channel specifically accounts for several symbol PCFICH channels
Indicate.If down control channel resources are not enough and data channel resource is superfluous, now each subframe may be without enough PDCCH
Resource causes that data channel resource is idle to be wasted dispatching user；The data if symbolic number that down control channel takes is excessive
Channel resource is not enough, and being now likely to occur the user of scheduling does not have Traffic Channel to transmit downlink data, it can be seen that, rationally divide
It is extremely important for system with time-domain resource shared by down control channel and data channel.
In existing LTE system, PDCCH resource allocative decision mainly has two kinds：A kind of is the joint self adaptation of PDCCH
Resource allocation methods, the load and the channel matter of UE mainly in the case where the total PDCCH resource of system determines, according to cell
Amount situation is distributed for the exclusive PDCCH of non-UE of multiple UE transmission datas and for exclusive to the UE of single UE transmission datas
PDCCH, that is, the method for determining the CCE polymerization grades of public search space and the exclusive search spaces of UE.Another kind is to determine physics
The method that down control channel takes symbol quantity, mainly includes：Obtain PHICH and take symbol numbers and symbol shared by PDCCH
Several relations；Obtain the symbol numbers that PHICH takes；The pass of symbol numbers according to shared by PHICH takes symbol numbers and PDCCH
System and PHICH take symbol numbers and determine symbol numbers shared by PDCCH.
The present inventor has found during the present invention is realized：Existing both distribution control channel resources
Scheme be all static allocation PDCCH take OFDM symbol number, i.e., the thing before using PDCCH channel bearing Downlink Control Information
Cannot be adjusted again after the OFDM symbol number shared by PDCCH needed for first determining, so as to realize the time domain of PDCCH
Resources control, due to the main OFDM symbol number by shared by static allocation PDCCH in prior art, both distribution
Scheme does not consider the quantity of communication system traffic and the uncertainty of business data transmission characteristic, this static distribution
The method of control channel resource is difficult in adapt to the truth of system load and business data transmission characteristic, causes power system capacity to receive
Limit.
The content of the invention
Embodiments provide distribution method and the base station of a kind of control channel resource, for realize PDCCH when
The control distribution of domain resource, improves the capacity of communication system.
To solve above-mentioned technical problem, the embodiment of the present invention provides technical scheme below：
In a first aspect, the embodiment of the present invention provides a kind of distribution method of control channel resource, including：
Calculate in physical downlink control channel PDCCH using after control channel unit CCE scheduling up-downgoing resources
Uplink authorization CCE utilization rates in individual preset time period；
Judge the numerical values recited between the uplink authorization CCE utilization rates and up high threshold；
If the uplink authorization CCE utilization rates are more than up high threshold, the OFDM that the PDCCH takes is obtained
OFDM symbol number；
Judge whether the OFDM symbol number reaches maximum；
When the first adjusting condition is met, downstream grants CCE proportion, the downstream grants CCE proportion are turned down
The ratio of the CCE numbers for descending scheduling and the total CCE numbers for being mapped to the PDCCH is referred to, first adjusting condition is
The uplink authorization CCE utilization rates are more than up high threshold and the OFDM symbol number is not reaching to maximum.
Second aspect, the embodiment of the present invention also provides a kind of base station, including：
Up CCE computing units, for calculating control channel unit CCE is used in physical downlink control channel PDCCH
The uplink authorization CCE utilization rates in a preset time period after scheduling up-downgoing resource；
First judging unit, for judging the numerical values recited between the uplink authorization CCE utilization rates and up high threshold；
Symbolic number acquiring unit, for when the uplink authorization CCE utilization rates are more than up high threshold, obtaining described
The orthogonal frequency division multiplex OFDM symbolic number that PDCCH takes；
Second judging unit, for judging whether the OFDM symbol number reaches maximum；
Descending CCE adjustment units, it is described for when the first adjusting condition is met, turning down downstream grants CCE proportion
Downstream grants CCE proportion refers to the ratio of the CCE numbers for descending scheduling and the total CCE numbers for being mapped to the PDCCH,
First adjusting condition is the uplink authorization CCE utilization rates more than up high threshold and the OFDM symbol number is not reaching to
Maximum.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
In embodiments of the present invention, a preset time period after up-downgoing resource is dispatched using CCE on PDCCH first
Interior calculating uplink authorization CCE utilization rates, then judge that uplink authorization CCE utilization rates are closed with the size of the up high threshold of setting
System, when uplink authorization CCE utilization rates are more than up high threshold, gets the OFDM symbol number of PDCCH occupancy, when meeting the
Downstream grants CCE proportion is turned down during one adjusting condition, because the uplink authorization CCE calculated in the embodiment of the present invention is utilized
Rate is to be directed to use CCE to dispatch a preset time period after up-downgoing resource on PDCCH, and is turning down downstream grants
Foundation is uplink authorization CCE utilization rates more than up high threshold and OFDM symbol number is not reaching to maximum during CCE proportions,
So the method for the embodiment of the present invention is controlled in the case where can really reflect communication system traffic transmission characteristic
Channel resource allocation, and can also foundation in the preset time period after using PDCCH channel bearing Downlink Control Information
Uplink authorization CCE utilization rates and OFDM symbol number enter Mobile state adjustment, can meet system load and business data transmission characteristic
Truth, improve communication system capacity.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of process blocks schematic diagram of the distribution method of control channel resource provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of relation between a variety of descending high threshold values and cell throughout；
Fig. 3 is the schematic diagram of relation between a variety of preset time period values and cell throughout；
Fig. 4 is a kind of application scenarios schematic diagram of the distribution method of control channel resource provided in an embodiment of the present invention；
Fig. 5 is another kind of application scenarios schematic diagram of the distribution method of control channel resource provided in an embodiment of the present invention；
Fig. 6 is the composition structural representation of base station provided in an embodiment of the present invention.
Specific embodiment
Embodiments provide distribution method and the base station of a kind of control channel resource, for realize PDCCH when
The control distribution of domain resource, improves the capacity of communication system.
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described, it is clear that disclosed below to the technical scheme in the embodiment of the present invention
Embodiment be only a part of embodiment of the invention, and not all embodiments.Based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained, belongs to the scope of protection of the invention.
The distribution method of control channel resource provided in an embodiment of the present invention, as shown in figure 1, mainly comprising the steps：
101st, calculate in Physical Downlink Control Channel（PDCCH, Physical Downlink Control Channel）On
Using control channel unit（CCE, Control Channel Element）A preset time period after scheduling up-downgoing resource
Interior uplink authorization CCE utilization rates.
In embodiments of the present invention, base station is when using PDCCH channel bearing Downlink Control Information, and base station can be according to this
The distribution method of the control channel resource that inventive embodiments are provided enters Mobile state adjustment, is passed with meeting system load and business datum
The truth of defeated characteristic, was determined in advance out in this and prior art before using PDCCH channel bearing Downlink Control Information
Cannot again be adjusted after OFDM symbol number shared by required PDCCH and differ completely.In present invention enforcement
In example, when needing to adjust the distribution of control channel resource, first pass through to be calculated in step 101 and dispatched using CCE on PDCCH
The uplink authorization CCE utilization rates in a preset time period after up-downgoing resource, that is to say, that in the embodiment of the present invention, need
It is set in using which time period calculating uplink authorization CCE utilization rates after CCE scheduling up-downgoing resources for, and this
Preset time period is to being currently in use the time period chosen when CCE is scheduled up-downgoing resource on PDCCH channels, by this
The statistics of the uplink authorization CCE utilization rates of individual time period, can reflect the real channel environmental aspect of PDCCH.
It should be noted that in embodiments of the present invention, uplink authorization CCE utilization rates were referred to a preset time period
Interior CCE is used for the ratio of dispatching uplink resource, reflection be ascending control channel situation.Wherein, as attainable side
Formula is, uplink authorization CCE utilization rates can be defined as the CCE numbers that dispatching uplink resource is used within a preset time period and
Keep for Physical Uplink Shared Channel（PUSCH, Physical Uplink Shared Channel）/ transmission power control
（TPC, Transmit Power Control）Total CCE numbers ratio, wherein CCE numbers are the letters of CCE numbers or CCE numbers
Claim.
Step 101 calculates up in the preset time period used on PDCCH after CCE scheduling up-downgoing resources
CCE utilization rates are authorized, specifically be may include steps of：
A1, the acquisition CCE numbers that dispatching uplink resource is used within the preset time period；
A2, acquisition keep for total CCE numbers of PUSCH/TPC within the preset time period；
A3, definition uplink authorization CCE utilization rates are RCCE_ul_use, calculate RCCE_ul_useIn the following way：
Wherein, Ni,CCE_ul_useRepresent in i-th Transmission Time Interval（TTI, Transmission Time Interval）
Carrying out uplink scheduling uses CCE numbers, t to represent that present sub-frame is numbered, NTTIRepresent the subframe included in preset time period
Number, NCCE_ul_totalTotal CCE numbers that PUSCH/TPC is dispatched are kept in expression.
For step A1, the CCE numbers addition that uplink scheduling is used will be carried out on each TTI, obtained when preset
Between carry out the CCE numbers that uplink scheduling is used in section, for example, 10 subframes of preset time period of setting, if present sub-frame
Numbering t is 1000, then when the CCE numbers that dispatching uplink resource is used are calculated, start in each TTI from i=1000-10
On the CCE numbers that use be added, until i=1000, obtain the CCE that dispatching uplink resource is used within preset time period, but
In actual applications, the selection of preset time period and present sub-frame numbering need to be set according to specific application scenarios, this
Place simply illustrates, and does not limit.
102nd, the numerical values recited between uplink authorization CCE utilization rates and up high threshold is judged.
In embodiments of the present invention, base station is specifically previously according to traffic data type, number of users, system bandwidth etc.
The up high threshold of system parameter setting, up high threshold refers to use CCE dispatching uplinks resource ensureing cell throughout situation
Under higher limit, the up high threshold can be specifically according to traffic data type, number of users, system bandwidth etc. by base station
System parameter is flexibly arranging, and base station can respectively be set with the specific number of the OFDM symbol number according to shared by PDCCH
Put different up high thresholds, the up high threshold of base station sets can be specifically setting according to specific service application scene
It is fixed, and base station can also enter Mobile state adjustment, to meet the truth of system load and business data transmission characteristic.
In a step 101 base station is calculated after uplink authorization CCE utilization rates, and base station is by uplink authorization CCE in step 102
Utilization rate carries out the comparison of numerical values recited with the up high threshold of base station sets, and result of the comparison has three kinds：Uplink authorization CCE is sharp
It is equal to less than up high threshold, uplink authorization CCE utilization rates more than up high threshold, uplink authorization CCE utilization rates with rate up
High threshold.Uplink authorization CCE utilization rates and up high threshold being carried out, whether numeric ratio is relatively as needing for base station in step 102
The foundation of the assignment problem of the CCE numbers between adjustment up-downgoing.
If the 103, uplink authorization CCE utilization rates are more than up high threshold, the OFDM that PDCCH takes is obtained
（OFDM, Orthogonal Frequency Division Multiplexing）Symbolic number.
In step 103, base station obtains the OFDM symbol number that PDCCH takes, and OFDM symbol number refers to the individual of OFDM symbol
Number.
104th, judge whether OFDM symbol number reaches maximum.
Judge whether the OFDM symbol number obtained in step 103 reaches maximum by base station in step 104, what maximum referred to
It is the maximum number of the PDCCH OFDM symbol numbers to be taken, under normal conditions, descending control area generally takes up one
Front 1 ~ 3 OFDM symbol of descending sub frame, then the maximum generally can be with value as 3, but the maximum can be with by concrete
Application scenarios setting, do not limit herein.
105th, when the first adjusting condition is met, downstream grants CCE proportion is turned down, wherein, the first adjusting condition is
Uplink authorization CCE utilization rates are more than up high threshold and OFDM symbol number is not reaching to maximum.
Wherein, downstream grants CCE proportion refers to the CCE numbers and the total CCE for being mapped to PDCCH for descending scheduling
The ratio of number.Being mapped to total CCE numbers of PDCCH includes the CCE numbers for descending scheduling and the CCE for uplink scheduling
Number sum.In embodiments of the present invention, downstream grants CCE proportion is turned down in base station, that is, reduces for descending scheduling
CCE numbers, accordingly so that for uplink scheduling uplink authorization CCE numbers increase.
Downstream grants CCE proportion refers to the ratio of the CCE numbers for descending scheduling and total CCE numbers, under definition
It is R that row authorizes CCE proportionsCCE_dl, define for descending scheduling CCE numbers be NCCE_dl_total, define and be mapped to PDCCH
Total CCE numbers be NCCE_total, then following relational expression is met between them：
In embodiments of the present invention, the adjusting condition of base station sets first, the then execution step when the first adjusting condition meets
105, wherein, the first adjusting condition for setting is as uplink authorization CCE utilization rates are more than up high threshold and OFDM symbol number does not have
Reach maximum.
It should be noted that in the embodiment of the present invention, step 105 turns down downstream grants CCE proportion, implementing
When need to turn down how many downstream grants CCE proportions, determined by scene is implemented, can specifically lower 0.05, also may be used
To lower 0.1 etc..
It should be noted that in embodiments of the present invention, the distribution side of control channel resource provided in an embodiment of the present invention
Method can also comprise the steps（It is not shown in FIG. 1）：
106th, the downstream grants CCE utilization rate in the preset time period is calculated；
107th, the numerical values recited between downstream grants CCE utilization rate and descending high threshold is judged；
Wherein, the first adjusting condition in 105 is uplink authorization CCE utilization rates more than up high threshold and OFDM symbol number
Maximum is not reaching to, or the first adjusting condition is uplink authorization CCE utilization rates more than up high threshold and OFDM symbol number reaches
To maximum and downstream grants CCE utilization rate be less than or equal to descending high threshold.
It should be noted that in step 106, downstream grants CCE utilization rate refers to the CCE quilts within a preset time period
For the ratio of dispatching downlink resource, reflection be down control channel situation.Wherein, it is as attainable mode, under
Row authorizes CCE utilization rates to be defined as the CCE numbers and keep for that dispatching downlink resource is used within a preset time period
Physical Downlink Shared Channel（PDSCH, Physical Downlink Shared Channel）Total CCE numbers ratio, wherein
CCE numbers are the abbreviations of CCE numbers or CCE numbers.
Base station calculates the downstream grants CCE utilization rate in preset time period in step 106, can specifically include following step
Suddenly：
B1, the acquisition CCE numbers that dispatching downlink resource is used within preset time period；
B2, acquisition keep for total CCE numbers of PDSCH within preset time period；
B3, definition downstream grants CCE utilization rate are RCCE_dl_use, R is calculated in the following wayCCE_dl_use：
Wherein, Ni,CCE_dl_useExpression carries out the CCE numbers that descending scheduling is used in i-th TTI, and t represents present sub-frame
Numbering, NTTTThe number of sub-frames that expression is included in preset time period, NCCE_dl_totalThe total of the PDSCH scheduling is kept in expression
CCE numbers.
For step B1, the CCE numbers addition that descending scheduling is used will be carried out on each TTI, obtained when preset
Between carry out the CCE numbers that descending scheduling is used in section.
For step 107, in embodiments of the present invention, base station is previously according to traffic data type, number of users, system band
The descending high threshold of specific system parameter setting such as width, descending high threshold refers to use CCE dispatching downlinks resource ensureing little
Higher limit in the case of area's handling capacity, the descending high threshold can be by base station according to traffic data type, number of users, system band
The specific systematic parameter such as width is flexibly arranging, and base station can be with the concrete of the OFDM symbol number according to shared by PDCCH
Being respectively provided with different descending high thresholds, the descending high threshold of base station sets can be with according to specific service application field for number
Scape is specifically setting, and base station can also enter Mobile state adjustment, to meet the true of system load and business data transmission characteristic
Truth condition.
It should be noted that in the embodiment of the present invention, the execution sequence of step 101 and step 106 does not have precedence relationship, can
To first carry out step 101 execution step 106 again simultaneously, it is also possible to first carry out step 106 execution step 101 again, can also perform
Step 101 and step 106, do not limit herein.
It should be noted that in step 106 base station is calculated after downstream grants CCE utilization rate, base station in step 107
The descending high threshold of downstream grants CCE utilization rate and base station sets is carried out into the comparison of numerical values recited, result of the comparison there are three kinds：
Downstream grants CCE utilization rate is more than descending high threshold, downstream grants CCE utilization rate less than descending high threshold, downstream grants CCE profit
Descending high threshold is equal to rate.Downstream grants CCE utilization rate and descending high threshold are carried out numeric ratio by base station in step 107 is relatively
As the foundation of the assignment problem for whether needing to adjust the CCE numbers between up-downgoing.For carry out in step 107 numeric ratio compared with
Result, it is also possible to the first adjusting condition is defined, when first adjusting condition meets, it is also possible to execution step 105 again, this
Place defines the first adjusting condition in addition to pointing out in step 105, and first adjusting condition can also be sharp for uplink authorization CCE
With rate is more than up high threshold and OFDM symbol number reaches maximum and downstream grants CCE utilization rate is less than or equal to descending
High threshold, that is, need while meeting following three condition：First, uplink authorization CCE utilization rates are more than up high threshold, and two, OFDM
Symbolic number reaches maximum, three, downstream grants CCE utilization rate be less than or equal to descending high threshold.
Up high threshold, the up low threshold of base station sets in order to describe the explanation embodiment of the present invention in detail（Subsequently retouch
It is described in detail in stating）, descending high threshold, descending low threshold（It is described in detail in subsequent descriptions）Implementation, this
In inventive embodiments, base station is with descending according to the specific system parameter setting such as traffic data type, number of users, system bandwidth
It is described in detail as a example by high threshold, the implementation of other three threshold values can be referring again to execution.
The service area environment of base station sets is 6 side shape cells, and for 2.3GHz, modulation system is the carrier frequency that base station adopts
Orthogonal frequency-time multiple access（OFDMA, Orthogonal Frequency Division Multiple Access）, base station is adopted
System bandwidth is 10MHz, and dispatching cycle is 1ms, and service source is Full Buffer, sets multiple different descending wealthy families
Limit, is then emulated, and compares simulation result, to find out optimal descending high threshold.Concrete test case and simulation result
Corresponding cell throughout under the value condition of various descending high threshold as shown in table 1.
In order to clearer explanation is for relation between a variety of descending high thresholds and cell throughout, figure is referred to
It is the schematic diagram of relation between a variety of descending high threshold values and cell throughout shown in 2, figure it is seen that working as
When descending high threshold gradually increases between 0.5 ~ 0.8, cell throughout gradually increases, when descending high threshold 0.8 ~ 0.9 it
Between when gradually increasing, cell throughout has somewhat reduced, and when descending wealthy family is limited to 0.8, cell throughout is maximum.
It should be noted that for Fig. 2, the scene is Full Buffer service sources, number of users is 2, initial PDCCH
Resource distribution is（3,2）, by analysis, control channel resource excess, traffic channel resource is not enough, therefore need to reduce control
Channel resource processed is improving throughput of system.From it is described above realize algorithm knowable to, when control channel resource excess, business are believed
During road inadequate resource, descending high threshold is higher, into more, the unnecessary control channel resources of the branch's number of times for reducing CCE numbers
The time for being converted to traffic channel resource is shorter, and throughput of system is bigger, thus when descending high threshold between 0.5 ~ 0.8 gradually
During increase, throughput of system gradually increases, and is that 5,10 scene is also entered for Full Buffer service sources, in addition to number of users
Emulation is gone, has as a result shown descending high threshold between 0.75 ~ 0.90, throughput of system is higher, can by above simulation analysis
To draw, when descending high threshold is between 0.75 ~ 0.90, throughput of system is higher, compared to not using the embodiment of the present invention
The Adaptive adjusting algorithm throughput of system of offer improves 10% ~ 20% or so.
It should be noted that because in emulation platform, service source is set up when emulation starts, and is continued until emulation
Terminate, in whole simulation process, business Source Type does not change, it is not quite alike with actual system in stable state,
Therefore the descending high threshold recommendation for being given according to simulation result may be less suitable, in real system application, according to scene
Situation configurating downlink high threshold.Above simulation result merely illustrates the reality of the descending high threshold of base station sets in the embodiment of the present invention
Existing mode, in specific application scenarios, base station can also dynamically adjust descending high threshold.
It is further to note that the preset time period selected in the embodiment of the present invention is the distribution side of control channel resource
The triggering cycle of method, in order to describe the embodiment of the present invention in detail in preset time period time length arrange, the present invention implement
To test under 10M bandwidth in example, under Full Buffer service sources, carry out as a example by emulating to different preset time period T
Describe in detail, concrete test case and simulation result it is as shown in table 2 when when descending high threshold is 0.9, each is different preset
Between the corresponding cell throughout of section.
In order to clearer explanation is for relation between a variety of preset time periods and cell throughout, figure is referred to
It is the schematic diagram of relation between a variety of preset time period values and cell throughout shown in 3, from figure 3, it can be seen that
When gradually increasing preset time period, cell throughout is gradually reduced, because when preset time period is bigger, disclosure satisfy that this
The number of times of the adjusting condition that bright embodiment is provided is fewer, and control channel resource is slower with what traffic channel resource was changed, and cell is gulped down
The amount of telling is less.Therefore preset time period is shorter, distribution method convergence time provided in an embodiment of the present invention is shorter, and cell throughout is got over
Height, accordingly, the number of times into the distribution adjustment of the present invention is more, and system complexity is higher, so needing in performance and complexity
Compromise between degree.Because in emulation platform, service source is set up when emulation starts, and is continued until that emulation terminates, entirely
In simulation process, business Source Type does not change, not quite alike with actual system in stable state, therefore basis
The preset time period recommendation that simulation result is given may be less suitable, in real system application, can be according to field condition
Configuration preset time period T, in the case of system complexity is acceptable, T is the smaller the better.
It should be noted that in embodiments of the present invention, the distribution side of control channel resource provided in an embodiment of the present invention
Method can also comprise the steps（It is not shown in FIG. 1）：
If the 108, downstream grants CCE utilization rate is more than descending high threshold, uplink authorization CCE utilization rates and up low door are judged
Numerical values recited between limit；
109th, when the second adjusting condition is met, downstream grants CCE proportion is heightened, the second adjusting condition is awarded for up
Power CCE utilization rates are less than up low threshold and downstream grants CCE utilization rate is more than descending high threshold.
For step 108, carried out after step 107 is performed, in embodiments of the present invention, base station is previously according to business
The up low threshold of specific system parameter setting such as data type, number of users, system bandwidth, up low threshold refers to use
Lower limit of the CCE dispatching uplinks resource in the case of cell throughout is ensured, the up low threshold can be by base station according to business
The specific systematic parameter such as data type, number of users, system bandwidth is flexibly arranging, and base station can be with according to PDCCH
Being respectively provided with different up low thresholds, the up low threshold of base station sets is also for the specific number of shared OFDM symbol number
Can specifically be set according to specific service application scene, and base station can also enter Mobile state adjustment, be born with meeting system
Carry the truth with business data transmission characteristic.
For step 109, downstream grants CCE proportion is heightened in base station, that is, increased the CCE for descending scheduling
Number, accordingly so that the uplink authorization CCE numbers for uplink scheduling are reduced, because uplink authorization CCE utilization rates are less than upper
Row low threshold, therefore should reduce for uplink authorization CCE numbers.
It should be noted that in embodiments of the present invention, the distribution side of control channel resource provided in an embodiment of the present invention
Method can also comprise the steps（It is not shown in FIG. 1）：
110th, when three adjusting conditions is met, the OFDM symbol number that PDCCH takes is increased, the 3rd adjusting condition is descending
Authorize CCE utilization rates more than descending high threshold and uplink authorization CCE utilization rates are more than or equal to up low threshold and OFDM is accorded with
Count is not reaching to maximum.
In embodiments of the present invention, step 110 is performed after step 108, and in step 110 base station can also set
Fixed 3rd adjusting condition, when three adjusting conditions is met, base station can increase the OFDM symbol number of PDCCH occupancy.Meet the
Three adjusting conditions are namely needed while meeting following three condition：First, downstream grants CCE utilization rate is more than descending high threshold,
2nd, uplink authorization CCE utilization rates be more than or equal to up low threshold, three, OFDM symbol number be not reaching to maximum.
It should be noted that in embodiments of the present invention, the distribution side of control channel resource provided in an embodiment of the present invention
Method can also comprise the steps（It is not shown in FIG. 1）：
If the 111, downstream grants CCE utilization rate is less than descending high threshold, judge downstream grants CCE utilization rate with descending low door
The numerical values recited of limit；
112nd, judge whether the OFDM symbol number that PDCCH takes is more than minima；
113rd, when four adjusting conditions is met, the OFDM symbol number that PDCCH takes is reduced, wherein, the 4th adjusting condition
For downstream grants CCE utilization rate is less than descending low threshold and OFDM symbol number is more than minima.
For step 111, carry out after step 107 is performed, in embodiments of the present invention, base station is previously according to industry
The descending low threshold of specific system parameter setting such as business data type, number of users, system bandwidth, descending low threshold refers to make
With lower limit of the CCE dispatching downlinks resource in the case of cell throughout is ensured, the descending low threshold can be by base station according to industry
The specific systematic parameter of business data type, number of users, system bandwidth etc. is flexibly arranging, and base station can be with basis
The specific number of the OFDM symbol number shared by PDCCH being respectively provided with different descending low thresholds, base station sets it is descending low
Thresholding can be specifically to set according to specific service application scene, and base station can also enter Mobile state adjustment, to meet
System load and the truth of business data transmission characteristic.
For judging the OFDM symbol number obtained in step 111 whether more than minima, minima by base station in step 112
The minimum number of the PDCCH OFDM symbol numbers to be taken is referred to, under normal conditions, descending control area generally takes up
Front 1 ~ 3 OFDM symbol of one descending sub frame, then the minima generally can with value as 1, but the minima can with by
Specific application scenarios are not limited setting herein.
In step 113, base station can also set the 4th adjusting condition, and when four adjusting conditions is met, base station can be with
Reduce the OFDM symbol number that PDCCH takes.Meet the 4th adjusting condition namely needs while meeting following two conditions：First,
Downstream grants CCE utilization rate be less than descending low threshold, two, OFDM symbol number be more than minima.
It should be noted that in embodiments of the present invention, the distribution side of control channel resource provided in an embodiment of the present invention
Method can also comprise the steps（It is not shown in FIG. 1）：
114th, when the first trigger condition is met, continue to calculate and dispatch another after up-downgoing resource using CCE on PDCCH
Uplink authorization CCE utilization rates in one preset time period, the first trigger condition is less than or equal to for uplink authorization CCE utilization rates
Up high threshold, or the first trigger condition is to have turned down after downstream grants CCE proportion.
It should be noted that step 114 is performed after step 102 or step 105, base station sets first are triggered
Condition, when the first trigger condition is met, base station resets another preset time period, repeats step 101, and it is right to realize
The dynamic adjustment of control channel resource.
It should be noted that in embodiments of the present invention, the distribution side of control channel resource provided in an embodiment of the present invention
Method can also comprise the steps（It is not shown in FIG. 1）：
115th, when the second trigger condition is met, continue to calculate and dispatch another after up-downgoing resource using CCE on PDCCH
Downstream grants CCE utilization rate in one preset time period, wherein, the second trigger condition is to have heightened downstream grants CCE institute
After accounting example, or the second trigger condition is to have increased after the OFDM symbol number that PDCCH takes, or the second trigger condition is
After the OFDM symbol number that reduced PDCCH has taken, or the second trigger condition is less than or equal to for downstream grants CCE utilization rate
Descending high threshold and downstream grants CCE utilization rate are more than descending low threshold.
It should be noted that step 115 is performed after step 109 or 110 or 112 or 113, base station sets second
Trigger condition, when the second trigger condition is met, base station resets another preset time period, repeats step 106,
Realize the dynamic adjustment to control channel resource.
In embodiments of the present invention, a preset time period after up-downgoing resource is dispatched using CCE on PDCCH first
Interior calculating uplink authorization CCE utilization rates, then judge that uplink authorization CCE utilization rates are closed with the size of the up high threshold of setting
System, when uplink authorization CCE utilization rates are more than up high threshold, gets the OFDM symbol number of PDCCH occupancy, when satisfaction first
Downstream grants CCE proportion is turned down during adjusting condition, due to the uplink authorization CCE utilization rates calculated in the embodiment of the present invention
It is to be directed to use CCE to dispatch a preset time period after up-downgoing resource on PDCCH, and is turning down downstream grants CCE
Foundation is uplink authorization CCE utilization rates more than up high threshold and OFDM symbol number is not reaching to maximum, institute during proportion
Method with the embodiment of the present invention is to be controlled letter in the case where can really reflect communication system traffic transmission characteristic
Road resource allocation, and can also be according in the preset time period after using PDCCH channel bearing Downlink Control Information
Row authorizes CCE utilization rates and OFDM symbol number to enter Mobile state adjustment, can meet system load and business data transmission characteristic
Truth, improves the capacity of communication system.
Above example describes the distribution method of control channel resource provided in an embodiment of the present invention, next with reality
Application examples be described in more details.
The implementation that downstream grants CCE proportion is turned down in the embodiment of the present invention is introduced first, as shown in figure 4, bag
Include following steps：
401st, calculate and dispatch the uplink authorization in a preset time period after up-downgoing resource using CCE on PDCCH
CCE utilization rates RCCE_ul_useWith downstream grants CCE utilization rate RCCE_dl_use；
402nd, R is judgedCCE_ul_useWhether it is more than up high threshold, works as RCCE_ul_useDuring more than up high threshold, step is triggered
403 perform, and work as RCCE_ul_useLess than or equal to up high threshold, triggering step 401 is re-executed；
403rd, judge whether OFDM symbol number reaches maximum, if so, trigger step 404 and perform, if it is not, triggering step
405 perform；
404th, R is judgedCCE_dl_useWhether it is more than descending high threshold, works as RCCE_dl_useDuring more than descending high threshold, step is triggered
401 re-execute, and work as RCCE_dl_useDuring less than or equal to descending high threshold, triggering step 405 is performed；
405th, downstream grants CCE proportion is turned down.
Next introduce in the embodiment of the present invention and heighten downstream grants CCE proportion, increase or reduce OFDM symbol
Several implementation, as shown in figure 5, comprising the steps：
501st, calculate and dispatch the uplink authorization in a preset time period after up-downgoing resource using CCE on PDCCH
CCE utilization rates RCCE_ul_useWith downstream grants CCE utilization rate RCCE_dl_use；
502nd, R is judgedCCE_dl_useWhether it is more than descending high threshold, works as RCCE_dl_useDuring more than descending high threshold, step is triggered
503 perform, and work as RCCE_dl_useDuring less than or equal to descending high threshold, triggering step 507 is performed；
503rd, R is judgedCCE_ul_useWhether it is more than up low threshold, works as RCCE_ul_useDuring more than up low threshold, step is triggered
504 perform, and work as RCCE_ul_useLess than or equal to up low threshold, triggering step 505 is performed；
504th, downstream grants CCE proportion is heightened, step 510 is then triggered and is performed；
505th, judge whether OFDM symbol number reaches maximum, if being not reaching to maximum, triggering step 506 is performed, if
Maximum is reached, triggering step 510 is performed；
506th, increase the OFDM symbol number that PDCCH takes, then trigger step 510 and perform；
507th, R is judgedCCE_dl_useWhether descending low threshold is less than, works as RCCE_dl_useDuring less than descending low threshold, step is triggered
508 perform, and work as RCCE_dl_useDuring more than or equal to descending low threshold, triggering step 510 is performed；
508th, judge that OFDM symbol number, whether more than minima, if so, triggers step 509 and performs, if it is not, triggering step
510 perform；
509th, the OFDM symbol number that PDCCH takes is reduced, step 510 is then triggered and is performed；
510th, calculate and dispatch up awarding in another preset time period after up-downgoing resource using CCE on PDCCH
Power CCE utilization rates RCCE_ul_useWith downstream grants CCE utilization rate RCCE_dl_use。
Above example describes the distribution method of control channel resource provided in an embodiment of the present invention, next introduces this
The base station of the use distribution method that inventive embodiments are provided, in actual applications, base station provided in an embodiment of the present invention, specifically
The distribution to control channel resource can be realized by way of software or hardware integration.To introduce in embodiments of the present invention
The device corresponding with the method introduced in said method embodiment, the execution method of concrete each unit can be found in said method reality
Example is applied, here only describes the content of correlation unit, is described as follows.
Base station provided in an embodiment of the present invention, as shown in fig. 6, base station 600, including：
Up CCE computing units 601, for calculating control channel unit is used in physical downlink control channel PDCCH
The uplink authorization CCE utilization rates in a preset time period after CCE scheduling up-downgoing resources；
First judging unit 602 is big for judging the numerical value between the uplink authorization CCE utilization rates and up high threshold
It is little；
Symbolic number acquiring unit 603, for when the uplink authorization CCE utilization rates are more than up high threshold, obtaining institute
State the orthogonal frequency division multiplex OFDM symbolic number of PDCCH occupancy；
Second judging unit 604, for judging whether the OFDM symbol number reaches maximum；
Descending CCE adjustment units 605, for when the first adjusting condition is met, turning down downstream grants CCE proportion,
The downstream grants CCE proportion refers to the CCE numbers and the total CCE numbers for being mapped to the PDCCH for descending scheduling
Ratio, first adjusting condition is that the uplink authorization CCE utilization rates do not have more than up high threshold and the OFDM symbol number
Have and reach maximum.
It should be noted that for base station provided in an embodiment of the present invention, being as the attainable mode of one of which, base
Standing 600 can also include（It is not shown in FIG. 6）：
Descending CCE computing units, for calculating the downstream grants CCE utilization rate in the preset time period；
3rd judging unit, for judging the numerical values recited between the downstream grants CCE utilization rate and descending high threshold；
The descending CCE adjustment units, are additionally operable to, when the first adjusting condition is met, turn down downstream grants CCE institute accounting
Example, first adjusting condition is the uplink authorization CCE utilization rates more than up high threshold and the OFDM symbol number does not have
Maximum is reached, or first adjusting condition is that the uplink authorization CCE utilization rates are more than up high threshold and the OFDM
Symbolic number reaches maximum and the downstream grants CCE utilization rate is less than or equal to descending high threshold.
It should be noted that for base station provided in an embodiment of the present invention, be as wherein another kind of attainable mode,
Base station 600 can also include（It is not shown in FIG. 6）：
4th judging unit, for when the downstream grants CCE utilization rate is more than descending high threshold, judging described up
Authorize the numerical values recited between CCE utilization rates and up low threshold；
The descending CCE adjustment units, are additionally operable to, when the second adjusting condition is met, heighten downstream grants CCE institute accounting
Example, second adjusting condition is the uplink authorization CCE utilization rates less than up low threshold and downstream grants CCE are sharp
It is more than descending high threshold with rate.
It should be noted that for base station provided in an embodiment of the present invention, be as wherein another kind of attainable mode,
Base station 600 can also include（It is not shown in FIG. 6）：
First OFDM symbol adjustment unit, for when three adjusting conditions is met, increasing the OFDM that the PDCCH takes
Symbolic number, the 3rd adjusting condition is that the downstream grants CCE utilization rate is more than descending high threshold and the uplink authorization
CCE utilization rates are more than or equal to up low threshold and the OFDM symbol number is not reaching to maximum.
It should be noted that for base station provided in an embodiment of the present invention, be as wherein another kind of attainable mode,
Base station 600 can also include（It is not shown in FIG. 6）：
5th judging unit, for when the downstream grants CCE utilization rate is less than descending high threshold, judging described descending
Authorize the numerical values recited of CCE utilization rates and descending low threshold；
6th judging unit, for judging whether the OFDM symbol number that the PDCCH takes is more than minima；
Second OFDM symbol adjustment unit, for when four adjusting conditions is met, reducing the OFDM that the PDCCH takes
Symbolic number, the 4th adjusting condition is that the downstream grants CCE utilization rate is less than descending low threshold and the OFDM symbol number
More than minima.
It should be noted that for up CCE computing units provided in an embodiment of the present invention, being capable of achieving as one of which
Mode be, up CCE computing units 601 can be also used for when meet the first trigger condition when, continue calculate in the PDCCH
The uplink authorization CCE utilization rates in another preset time period after upper use CCE scheduling up-downgoing resource, first triggering
Condition is that the uplink authorization CCE utilization rates are less than or equal to up high threshold, or first trigger condition to have turned down
After downstream grants CCE proportion.
It should be noted that for descending CCE computing units provided in an embodiment of the present invention, can be real as wherein another kind
Existing mode is that descending CCE computing units can be also used for when the second trigger condition is met, and continues to calculate in the PDCCH
The downstream grants CCE utilization rate in another preset time period after upper use CCE scheduling up-downgoing resource, second triggering
Condition is to have heightened after downstream grants CCE proportion, or second trigger condition is accounted for have increased the PDCCH
After OFDM symbol number, or after the OFDM symbol number that second trigger condition is the reduced PDCCH occupancy,
Or second trigger condition is that the downstream grants CCE utilization rate is less than or equal to descending high threshold and the downstream grants
CCE utilization rates are more than descending low threshold.
It should be noted that for up CCE computing units provided in an embodiment of the present invention, can be real as wherein another kind
Existing mode is that up CCE computing units 601 can include（It is not shown in FIG. 6）：
First acquisition module, for obtaining the CCE numbers that dispatching uplink resource is used within the preset time period；
Second acquisition module, keeps for Physical Uplink Shared Channel PUSCH/ to send out for obtaining within the preset time period
Penetrate total CCE numbers of Power Control TPC；
First computing module, for calculating uplink authorization CCE utilization rates R in the following wayCCE_ul_use：
Wherein, the Ni,CCE_ul_useRepresent that carrying out uplink scheduling in i-th Transmission Time Interval TTI uses CCE
Number, the t represents that present sub-frame is numbered, the NTTIThe number of sub-frames included in the preset time period is represented, it is described
NCCE_ul_totalTotal CCE numbers of the PUSCH/TPC scheduling are kept in expression.
It should be noted that for descending CCE computing units provided in an embodiment of the present invention, can be real as wherein another kind
Existing mode is that descending CCE computing units can include（It is not shown in FIG. 6）：
3rd acquisition module, for obtaining the CCE numbers that dispatching downlink resource is used within the preset time period；
4th acquisition module, keeps for Physical Downlink Shared Channel PDSCH's for obtaining within the preset time period
Total CCE numbers；
Second computing module, for calculating downstream grants CCE utilization rate R in the following wayCCE_dl_use：
Wherein, the Ni,CCE_dl_useExpression carries out the CCE numbers that descending scheduling is used in i-th TTI, and the t is represented
Present sub-frame is numbered, the NTTIRepresent the number of sub-frames included in the preset time period, the NCCE_dl_totalRepresent reserved
To total CCE numbers of PDSCH scheduling.
It should be noted that the content such as information exchange, implementation procedure between each module/unit of said apparatus, due to
The inventive method embodiment is based on same design, and the technique effect that it brings is identical with the inventive method embodiment, particular content
The narration in present invention embodiment of the method as shown in Figure 1 is can be found in, here is omitted.
In embodiments of the present invention, after CCE computing units up first are on PDCCH using CCE scheduling up-downgoing resources
A preset time period in calculate uplink authorization CCE utilization rates, then the first judging unit judge uplink authorization CCE utilize
The magnitude relationship of rate and the up high threshold of setting, when uplink authorization CCE utilization rates are more than up high threshold, symbolic number is obtained
Unit gets the OFDM symbol number of PDCCH occupancy, and when the first adjusting condition is met, descending CCE adjustment units turn down descending awarding
Power CCE proportions, because the uplink authorization CCE utilization rates calculated in the embodiment of the present invention are for using on PDCCH
A preset time period after CCE scheduling up-downgoing resources, and foundation is up when downstream grants CCE proportion is turned down
CCE utilization rates are authorized more than up high threshold and OFDM symbol number is not reaching to maximum, so the method for the embodiment of the present invention
It is that channel resource allocation is controlled in the case where can really reflect communication system traffic transmission characteristic, and is using
Can also be according to uplink authorization CCE utilization rates and OFDM in preset time period after PDCCH channel bearing Downlink Control Information
Symbolic number enters Mobile state adjustment, can meet the truth of system load and business data transmission characteristic, improves communication system
Capacity.
One of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method can be
The hardware that correlation is instructed by program is completed, and described program can be stored in a kind of computer-readable recording medium, on
It can be read only memory, disk or CD etc. to state the storage medium mentioned.
The distribution method and base station of a kind of control channel resource provided by the present invention are described in detail above, it is right
In one of ordinary skill in the art, according to the thought of the embodiment of the present invention, can in specific embodiments and applications
There is change part, in sum, this specification content should not be construed as limiting the invention.
Claims (18)
1. a kind of distribution method of control channel resource, it is characterised in that include：
Calculate and dispatch one after up-downgoing resource in advance using control channel unit CCE in physical downlink control channel PDCCH
Put the uplink authorization CCE utilization rates in the time period；
Judge the numerical values recited between the uplink authorization CCE utilization rates and up high threshold；
If the uplink authorization CCE utilization rates are more than up high threshold, the orthogonal frequency division multiplex OFDM that the PDCCH takes is obtained
Symbolic number；
Judge whether the OFDM symbol number reaches maximum；
When the first adjusting condition is met, downstream grants CCE proportion is turned down, the downstream grants CCE proportion is referred to
For the ratio of CCE numbers and the total CCE numbers for being mapped to the PDCCH of descending scheduling, first adjusting condition is described
Uplink authorization CCE utilization rates are more than up high threshold and the OFDM symbol number is not reaching to maximum or first adjustment bar
Part is the uplink authorization CCE utilization rates more than up high threshold and the OFDM symbol number reaches maximum and downstream grants
CCE utilization rates are less than descending high threshold.
2. method according to claim 1, it is characterised in that methods described also includes：
Calculate the downstream grants CCE utilization rate in the preset time period；
Judge the numerical values recited between the downstream grants CCE utilization rate and descending high threshold.
3. method according to claim 2, it is characterised in that methods described also includes：
If the downstream grants CCE utilization rate is more than descending high threshold, the uplink authorization CCE utilization rates and up low door are judged
Numerical values recited between limit；
When the second adjusting condition is met, downstream grants CCE proportion is heightened, second adjusting condition up is awarded for described
Power CCE utilization rates are less than up low threshold and the downstream grants CCE utilization rate is more than descending high threshold.
4. method according to claim 3, it is characterised in that methods described also includes：
When three adjusting conditions is met, increase the OFDM symbol number that the PDCCH takes, the 3rd adjusting condition is described
Downstream grants CCE utilization rate more than descending high threshold and the uplink authorization CCE utilization rates more than or equal to up low threshold,
And the OFDM symbol number is not reaching to maximum.
5. method according to claim 2, it is characterised in that methods described also includes：
If the downstream grants CCE utilization rate is less than descending high threshold, judge the downstream grants CCE utilization rate with descending low door
The numerical values recited of limit；
Judge whether the OFDM symbol number that the PDCCH takes is more than minima；
When four adjusting conditions is met, the OFDM symbol number that the PDCCH takes is reduced, the 4th adjusting condition is described
Downstream grants CCE utilization rate is less than descending low threshold and the OFDM symbol number is more than minima.
6. method according to any one of claim 1 to 5, it is characterised in that methods described also includes：
When the first trigger condition is met, continue to calculate and dispatch another after up-downgoing resource using CCE on the PDCCH
Uplink authorization CCE utilization rates in preset time period, first trigger condition be the uplink authorization CCE utilization rates be less than or
Equal to up high threshold, or first trigger condition is to turn down after downstream grants CCE proportion.
7. the method according to any one of claim 2 to 5, it is characterised in that methods described also includes：
When the second trigger condition is met, continue to calculate and dispatch another after up-downgoing resource using CCE on the PDCCH
Downstream grants CCE utilization rate in preset time period, second trigger condition for heighten downstream grants CCE proportion it
Or second trigger condition is afterwards, or second trigger condition is to increase after the OFDM symbol number that the PDCCH takes,
After reducing the OFDM symbol number that the PDCCH takes, or second trigger condition is that the downstream grants CCE utilization rate is little
In or equal to descending high threshold and the downstream grants CCE utilization rate be more than descending low threshold.
8. method according to any one of claim 1 to 5, it is characterised in that the calculating is believed in physical down control
The uplink authorization CCE dispatched in a preset time period after up-downgoing resource using control channel unit CCE on road PDCCH is sharp
With rate, including：
Obtain the CCE numbers that dispatching uplink resource is used within the preset time period；
Total CCE of Physical Uplink Shared Channel PUSCH/ transmission power controls TPC is kept in acquisition within the preset time period
Number；
Uplink authorization CCE utilization rates R are calculated in the following wayCCE_ul_use：
Wherein, the Ni,CCE_ul_useExpression carries out uplink scheduling and uses CCE numbers, institute in i-th Transmission Time Interval TTI
State t and represent that present sub-frame is numbered, the NTTIRepresent the number of sub-frames included in the preset time period, the NCCE_ul_total
Total CCE numbers of the PUSCH/TPC scheduling are kept in expression.
9. the method according to any one of claim 2 to 5, it is characterised in that in the calculating preset time period
Downstream grants CCE utilization rate, including：
Obtain the CCE numbers that dispatching downlink resource is used within the preset time period；
Total CCE numbers of Physical Downlink Shared Channel PDSCH are kept in acquisition within the preset time period；
Downstream grants CCE utilization rate R is calculated in the following wayCCE_dl_use：
Wherein, the Ni,CCE_dl_useExpression carries out the CCE numbers that descending scheduling is used in i-th TTI, and the t represents current
Subframe number, the NTTIRepresent the number of sub-frames included in the preset time period, the NCCE_dl_totalInstitute is kept in expression
State total CCE numbers of PDSCH scheduling.
10. a kind of base station, it is characterised in that include：
Up CCE computing units, are dispatched in physical downlink control channel PDCCH for calculating using control channel unit CCE
The uplink authorization CCE utilization rates in a preset time period after up-downgoing resource；
First judging unit, for judging the numerical values recited between the uplink authorization CCE utilization rates and up high threshold；
Symbolic number acquiring unit, for when the uplink authorization CCE utilization rates are more than up high threshold, obtaining the PDCCH
The orthogonal frequency division multiplex OFDM symbolic number of occupancy；
Second judging unit, for judging whether the OFDM symbol number reaches maximum；
Descending CCE adjustment units, it is described descending for when the first adjusting condition is met, turning down downstream grants CCE proportion
CCE proportions are authorized to refer to the ratio of the CCE numbers for descending scheduling and the total CCE numbers for being mapped to the PDCCH, it is described
First adjusting condition is the uplink authorization CCE utilization rates more than up high threshold and the OFDM symbol number is not reaching to maximum
Value or first adjusting condition are the uplink authorization CCE utilization rates more than up high threshold and the OFDM symbol number reaches
To maximum and downstream grants CCE utilization rate be less than descending high threshold.
11. base stations according to claim 10, it is characterised in that the base station also includes：
Descending CCE computing units, for calculating the downstream grants CCE utilization rate in the preset time period；
3rd judging unit, for judging the numerical values recited between the downstream grants CCE utilization rate and descending high threshold.
12. base stations according to claim 11, it is characterised in that the base station also includes：
4th judging unit, for when the downstream grants CCE utilization rate is more than descending high threshold, judging the uplink authorization
Numerical values recited between CCE utilization rates and up low threshold；
The descending CCE adjustment units, are additionally operable to, when the second adjusting condition is met, heighten downstream grants CCE proportion, institute
The second adjusting condition is stated for the uplink authorization CCE utilization rates are less than up low threshold and the downstream grants CCE utilization rate is big
In descending high threshold.
13. base stations according to claim 12, it is characterised in that the base station also includes：
First OFDM symbol adjustment unit, for when three adjusting conditions is met, increasing the OFDM symbol that the PDCCH takes
Number, the 3rd adjusting condition is the downstream grants CCE utilization rate more than descending high threshold and the uplink authorization CCE is sharp
With rate is more than or equal to up low threshold and the OFDM symbol number is not reaching to maximum.
14. base stations according to claim 11, it is characterised in that the base station also includes：
5th judging unit, for when the downstream grants CCE utilization rate is less than descending high threshold, judging the downstream grants
The numerical values recited of CCE utilization rates and descending low threshold；
6th judging unit, for judging whether the OFDM symbol number that the PDCCH takes is more than minima；
Second OFDM symbol adjustment unit, for when four adjusting conditions is met, reducing the OFDM symbol that the PDCCH takes
Number, the 4th adjusting condition is the downstream grants CCE utilization rate less than descending low threshold and the OFDM symbol number is more than
Minima.
15. base stations according to any one of claim 10 to 14, it is characterised in that the up CCE computing units, also
Another after up-downgoing resource is dispatched for when the first trigger condition is met, continuing to calculate using CCE on the PDCCH
Uplink authorization CCE utilization rates in preset time period, first trigger condition be the uplink authorization CCE utilization rates be less than or
Equal to up high threshold, or first trigger condition is to turn down after downstream grants CCE proportion.
16. base stations according to any one of claim 11 to 14, it is characterised in that the descending CCE computing units, also
Another after up-downgoing resource is dispatched for when the second trigger condition is met, continuing to calculate using CCE on the PDCCH
Downstream grants CCE utilization rate in preset time period, second trigger condition for heighten downstream grants CCE proportion it
Or second trigger condition afterwards, or second trigger condition is to increase after the OFDM symbol number that the PDCCH takes,
After to reduce the OFDM symbol number that the PDCCH takes, or second trigger condition is the downstream grants CCE utilization rate
Less than or equal to descending high threshold and the downstream grants CCE utilization rate be more than descending low threshold.
17. base stations according to any one of claim 10 to 14, it is characterised in that the up CCE computing units, bag
Include：
First acquisition module, for obtaining the CCE numbers that dispatching uplink resource is used within the preset time period；
Second acquisition module, keeps for Physical Uplink Shared Channel PUSCH/ to launch work(for obtaining within the preset time period
Rate controls total CCE numbers of TPC；
First computing module, for calculating uplink authorization CCE utilization rates R in the following wayCCE_ul_use：
Wherein, the Ni,CCE_ul_useExpression carries out uplink scheduling and uses CCE numbers, institute in i-th Transmission Time Interval TTI
State t and represent that present sub-frame is numbered, the NTTIRepresent the number of sub-frames included in the preset time period, the NCCE_ul_totalTable
Show the total CCE numbers for keeping for the PUSCH/TPC scheduling.
18. base stations according to any one of claim 11 to 14, it is characterised in that the descending CCE computing units, bag
Include：
3rd acquisition module, for obtaining the CCE numbers that dispatching downlink resource is used within the preset time period；
4th acquisition module, for obtaining total CCE that Physical Downlink Shared Channel PDSCH is kept within the preset time period
Number；
Second computing module, for calculating downstream grants CCE utilization rate R in the following wayCCE _dl_use：
Wherein, the Ni,CCE_dl_useExpression carries out the CCE numbers that descending scheduling is used in i-th TTI, and the t represents current
Subframe number, the NTTIRepresent the number of sub-frames included in the preset time period, the NCCE_dl_totalInstitute is kept in expression
State total CCE numbers of PDSCH scheduling.
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| CN110719638A (en) | 2014-05-30 | 2020-01-21 | 华为技术有限公司 | Method and equipment for sending and receiving downlink control information |
| CN105577498B (en) * | 2015-12-31 | 2019-01-25 | 北京格林伟迪科技股份有限公司 | Serial communication method and device between a kind of plate |
| CN107846702B (en) * | 2016-09-20 | 2021-05-14 | 普天信息技术有限公司 | Resource allocation method for enhanced physical downlink control channel |
| CN107888361B (en) * | 2016-09-30 | 2022-03-11 | 中兴通讯股份有限公司 | Method, device and equipment for transmitting common control information |
| CN109041118B (en) * | 2017-06-08 | 2020-11-20 | 大唐移动通信设备有限公司 | Resource allocation method and communication equipment |
| 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 |
| CN109510694B (en) * | 2017-09-14 | 2021-08-06 | 中国移动通信有限公司研究院 | Configuration method of control channel unit resource and network side equipment |
| CN110121188B (en) * | 2018-02-07 | 2023-03-31 | 成都鼎桥通信技术有限公司 | High-load warning method |
| CN110582070A (en) * | 2018-06-11 | 2019-12-17 | 成都鼎桥通信技术有限公司 | High-load early warning method based on CBTC (communication based train control) service |
| CN113259032B (en) * | 2020-02-11 | 2022-04-22 | 大唐移动通信设备有限公司 | Resource control method and device |
| CN111935823B (en) * | 2020-08-04 | 2021-08-10 | 苏州智铸通信科技股份有限公司 | Adaptive adjustment method, device, base station and storage medium for downlink control channel resources |
| CN117528780A (en) * | 2022-07-30 | 2024-02-06 | 上海华为技术有限公司 | Resource allocation method, device and system |
| CN116546631B (en) * | 2023-07-06 | 2023-10-27 | 极芯通讯技术(南京)有限公司 | Control channel time-frequency resource allocation method, equipment and storage medium |
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| CN102448179A (en) * | 2012-01-18 | 2012-05-09 | 中兴通讯股份有限公司 | Resource distribution method and eNodeB (evolved Node B) |
| CN102595612A (en) * | 2012-02-24 | 2012-07-18 | 电信科学技术研究院 | Resource allocation method and device |
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| US10003445B2 (en) * | 2010-04-30 | 2018-06-19 | Google Technology Holdings LLC | Method and apparatus for scheduling a controlchannel in an orthogonal frequency division multiplexing communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102448179A (en) * | 2012-01-18 | 2012-05-09 | 中兴通讯股份有限公司 | Resource distribution method and eNodeB (evolved Node B) |
| CN102595612A (en) * | 2012-02-24 | 2012-07-18 | 电信科学技术研究院 | Resource allocation method and device |
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