CN104348572B - Physical Downlink Control Channel symbolic number adaptive approach and base station - Google Patents
Physical Downlink Control Channel symbolic number adaptive approach and base station Download PDFInfo
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- CN104348572B CN104348572B CN201310313755.2A CN201310313755A CN104348572B CN 104348572 B CN104348572 B CN 104348572B CN 201310313755 A CN201310313755 A CN 201310313755A CN 104348572 B CN104348572 B CN 104348572B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
Abstract
The present invention provides a kind of physical downlink control channel PDCCH symbolic number adaptive approach and base station.The aperiodicity resource element groups REG quantity that PDCCH in statistics predetermined period is used；Calculate the periodicity REG quantity that the current transmission time interval TTI PDCCH is used；According to the aperiodicity REG quantity and the periodicity REG quantity sums, current TTI PDCCH symbolic number is calculated.The PDCCH symbolic numbers adaptive approach provided using the present invention and base station, it is possible to increase the adaptive accuracy of PDCCH symbolic numbers.
Description
Technical field
The present invention relates to the communication technology, more particularly to a kind of Physical Downlink Control Channel（Physical Downlink
Control Channel, abbreviation PDCCH）Symbolic number adaptive approach and base station（Evolved Node B, abbreviation eNB）.
Background technology
The number of PDCCH symbolic numbers, not only influences Physical Downlink Shared Channel（Physical Downlink Shared
Channel, abbreviation PDSCH）For the symbolic number of data transfer, but also directly determine the user that present sub-frame can be authorized
Number, therefore, in communication process, eNB is according to control channel element in the nearest cycle（Control Channel Element, letter
Claim CCE）Service condition estimate PDCCH symbolic numbers, to realize the adaptive adjustment of PDCCH symbolic numbers.
At present, PDCCH symbolic numbers adaptive approach is：Subframe in one radio frames is classified, it is default at one
Cycle counts the CCE of all kinds of subframes service condition, for a certain class subframe, if current transmission time interval
（Transmission Time Interval, abbreviation TTI）CCE residues reach a symbol, then statistical result adds one, if work as
Preceding TTI CCE residues are less than a symbol, then statistical result is reset；If there are CCE distribution failures, record CCE distribution failures；
At the beginning of a new TTI, for the type of each subframe, above-mentioned statistical result is checked, if there is CCE to distribute failure record, and
And current sign number is not up to maximum, then in above-mentioned new TTI, PDCCH symbolic numbers increase a symbol, if TTI CCE
Residue reaches that the statistics number of a symbol reaches preset value, and current sign number is not minimum, then in above-mentioned new TTI
In, PDCCH symbolic numbers reduce by a symbol.
It is rational using the method for above-mentioned existing setting PDCCH symbolic numbers in public network；But in private network, group
Group paging cycle uses public space CCE, and power drain is higher, PDCCH symbolic numbers often occurs and just shrinks, and because group
The arrival of group paging causes CCE not enough, so that cause this scheduling failure, also, this scheduling failure causes PDCCH symbols again
Number expansion, and after this scheduling, need to wait a predetermined period to shrink PDCCH symbols again again, so as to cause
The symbolic number that PDSCH can be used before PDCCH symbols shrink is reduced.Therefore, it is adaptively square using existing PDCCH symbolic numbers
Method, PDCCH symbolic numbers are shunk or expanded not in time, and the accuracy of the PDCCH symbolic numbers of setting is poor.
The content of the invention
The first aspect of the invention is to provide a kind of PDCCH symbolic numbers adaptive approach, to solve in the prior art
Defect, improve the adaptive accuracy of PDCCH symbolic numbers.
Another aspect of the present invention is to provide a kind of eNB, to solve defect of the prior art, improves PDCCH symbols
The adaptive accuracy of number.
The first aspect of the invention is to provide a kind of physical downlink control channel PDCCH symbolic number adaptive approach, bag
Include：
The aperiodicity resource element groups REG quantity that the PDCCH in statistics predetermined period is used；
Calculate the periodicity REG quantity that the current transmission time interval TTI PDCCH is used；
According to the aperiodicity REG quantity and the periodicity REG quantity sums, the current TTI PDCCH is calculated
Symbolic number.
Method as described above, wherein, the aperiodicity REG numbers that the PDCCH in the statistics predetermined period is used
Amount includes：
The control channel element CCE in the proprietary space of the PDCCH in statistics predetermined period REG quantity.
Method as described above, wherein, the periodicity REG quantity bags that the PDCCH for calculating current TTI is used
Include：
Calculate the CCE of current TTI PDCCH public space REG quantity, Physical Control Format Indicator Channel
PCFICH REG quantity and physical hybrid automatic repeat request indicator channel PHICH REG quantity sums.
Method as described above, wherein,
Methods described also includes：Count the CCE in the proprietary space of the PDCCH in predetermined period use work(
Rate；Calculate the CCE of current TTI PDCCH public space use power, the use power of the PCFICH and described
PHICH use power；
The symbol that the PDCCH is calculated according to the aperiodicity REG quantity and the periodicity REG quantity sums
Number includes：According to the aperiodicity REG quantity and the periodicity REG quantity sums, and according to the proprietary of the PDCCH
The CCE in space use power, the CCE of the public space of PDCCH use power, the use power of the PCFICH,
The use power of the PHICH and reserved power sum, calculate the symbolic number of the PDCCH.
Another aspect of the present invention is to provide a kind of base station eNB, including：
Aperiodicity symbolic number statistic unit, the aperiodicity money that the PDCCH for counting in predetermined period is used
Source element group REG quantity；
Periodic symbols number computing unit, for calculating the cycle that the current transmission time interval TTI PDCCH is used
Property REG quantity；
Total symbolic number computing unit, for according to the aperiodicity REG quantity and the periodicity REG quantity sums,
Calculate current TTI PDCCH symbolic number.
ENB as described above, wherein,
The aperiodicity REG statistic units are specifically for the proprietary space of the PDCCH in statistics predetermined period
Control channel element CCE REG quantity.
ENB as described above, wherein,
The periodicity REG computing units are specifically for the CCE's of the current TTI of calculating PDCCH public space
REG quantity, Physical Control Format Indicator Channel PCFICH REG quantity and physical hybrid automatic repeat request indicator channel
PHICH REG quantity sums.
ENB as described above, wherein,
Also include：Aperiodicity power statistic unit and periodic power computing unit；
The aperiodicity power statistic unit is used for the proprietary space for counting the PDCCH in the predetermined period
CCE use power；
The periodic power computing unit is used for the use for calculating the CCE of current TTI PDCCH public space
The use power of power, the use power of the PCFICH and the PHICH；
Total symbolic number computing unit is specifically for according to the aperiodicity REG quantity and the periodicity REG numbers
Measure sum, and made according to the CCE in the proprietary space of PDCCH use power, the CCE of the public space of the PDCCH
With power, the use power of the PCFICH, the use power of the PHICH and reserved power sum, calculate the PDCCH's
Symbolic number.
From foregoing invention content, the aperiodicity REG quantity that PDCCH is used, the week used for PDCCH are only counted
Phase property REG quantity is obtained by the way of calculating, and PDCCH is calculated according to aperiodicity REG quantity and periodicity REG quantity sum
Symbolic number.Because group paging has a periodic characteristics, and the periodicity of group paging is variable, therefore prior art
In the mode that is counted to PDCCH overall symbol number, measurement period can not be consistent with the cycle of group paging, causes
PDCCH symbolic number accuracy is poor, using the method for the embodiment of the present invention one, for aperiodicity REG quantity, using to first
The method that cycle is counted is obtained, and for periodicity REG quantity, is obtained by the way of calculating current TTI, finally
PDCCH symbolic numbers are obtained according to aperiodicity REG quantity and periodicity REG quantity sum, prior art is used so as to avoid
Overall statistical method when paroxysmal group paging to setting the adverse effects of PDCCH symbolic numbers, improve PDCCH symbolic numbers from
The accuracy of adaptation.
Brief description of the drawings
Fig. 1 is the flow chart of the PDCCH symbolic number adaptive approach of the embodiment of the present invention one；
Fig. 2 is the flow chart of the PDCCH symbolic number adaptive approach of the embodiment of the present invention two；
Fig. 3 is the eNB of the embodiment of the present invention three structural representation.
Embodiment
Fig. 1 is the flow chart of the PDCCH symbolic number adaptive approach of the embodiment of the present invention one.As shown in figure 1, this method bag
Include procedure below.
Step 101：The aperiodicity resource element groups that PDCCH in statistics predetermined period is used（Resource
Element Group, abbreviation REG）Quantity.
Step 102：Calculate the periodicity REG quantity that the current TTI PDCCH is used.
Step 103：According to the aperiodicity REG quantity and the periodicity REG quantity sums, calculate current TTI's
The symbolic number of the PDCCH.
In the embodiment of the present invention one, the aperiodicity REG quantity that PDCCH is used, the week used for PDCCH are only counted
Phase property REG quantity is obtained by the way of calculating, and PDCCH is calculated according to aperiodicity REG quantity and periodicity REG quantity sum
Symbolic number.Because group paging has a periodic characteristics, and the periodicity of group paging is variable, therefore prior art
The mode counted to PDCCH overall symbol number, measurement period can not be consistent with the cycle of group paging, causes
PDCCH symbolic number accuracy is poor, using the method for the embodiment of the present invention one, for aperiodicity REG quantity, using to first
The method that cycle is counted is obtained, and for periodicity REG quantity, is obtained by the way of calculating current TTI, finally
PDCCH symbolic numbers are obtained according to aperiodicity REG quantity and periodicity REG quantity sum, prior art is used so as to avoid
Overall statistical method when paroxysmal group paging to setting the adverse effects of PDCCH symbolic numbers, improve PDCCH symbolic numbers from
The accuracy of adaptation.
Fig. 2 is the flow chart of the PDCCH symbolic number adaptive approach of the embodiment of the present invention two.As shown in Fig. 2 this method bag
Include procedure below.
Step 201：The control channel element in the proprietary space of the PDCCH in statistics predetermined period（Control Channel
Element, abbreviation CCE）REG quantity.
In this step, the aperiodicity REG quantity that the PDCCH in statistics predetermined period is used, specific method is to count
The CCE in the proprietary space of the PDCCH in predetermined period REG quantity.Wherein, the predetermined period can be according to actual conditions spirit
Selection living, can set the numerical value of the predetermined period as small as possible.
Further, in this step, the CCE in the proprietary space of the PDCCH in statistics predetermined period REG quantity
At the same time it can also the CCE in the proprietary space that counts the PDCCH in predetermined period use power.
This method also includes：The periodicity REG quantity that the current TTI PDCCH is used is calculated, specific method is：Meter
Calculate the CCE of current TTI PDCCH public space REG quantity, Physical Control Format Indicator Channel（Physical
Control Format Indicator Channel, abbreviation PCFICH）REG quantity refer to physical mixed HARQ
Show channel（Physical Hybrid Automatic Retransmission Request Indicator Channel, letter
Claim PHICH）REG quantity sums.Further, in the PDCCH for the calculating current TTI periodicity REG quantity used
During, the CCE in current TTI PDCCH proprietary space use power, the CCE of PDCCH public space can also be calculated
Use power, PCFICH use power, PHICH use power and reserved power sum.Specifically, above-mentioned calculating REG
The process of quantity sum and the process of calculating power sum may comprise steps of 202 to step 204.Step 201 is to step
Rapid 204 execution sequence is unrestricted.
Step 202：Calculate the CCE of current TTI PDCCH public space REG quantity.
In this step, the CCE of current TTI PDCCH public space REG quantity is calculated, the present invention is implemented
Circular is not limited in example, the method for the CCE of any public space that can calculate PDCCH REG quantity is equal
It is applicable, for example, system message and paging reading can be according to Long Term Evolutions（Long Term Evolution, abbreviation LTE）
36.331 agreements and related set calculate, and power control and group can set according to its cycle and be calculated, accidental access response
（Random Access Response, abbreviation RAR）Then can be by receiving random access radio network temporary mark（Radio
Network Temporary Identifier, abbreviation RNTI）Calculate and send the RAR moment.
Further, in this step, the PDCCH for calculating current TTI public space CCE REG quantity
While, the CCE of current TTI PDCCH public space use power can also be calculated.Correspondingly, the present invention is real
Apply in example and circular is not limited, the method for the CCE of any public space that can calculate PDCCH use power
It is applicable, for example, according to public space reference signal（Reference Signal, abbreviation RS）Power setting, calculate single
Power required for individual CCE, then pass through the power required for public space CCE numbers calculating public space CCE.
Step 203：Calculate current TTI PCFICH REG quantity.
In this step, calculate in current TTI PCFICH REG quantity, the embodiment of the present invention to circular
It is not limited, the method for any REG quantity that can calculate PCFICH is applicable, for example, its quantity is in LTE protocol 36.211
In have clear and definite regulation
Further, in this step, while current TTI PCFICH REG quantity is calculated, it can also calculate and work as
Preceding TTI PCFICH use power.Correspondingly, circular is not limited in the embodiment of the present invention, it is any
The method that PCFICH use power can be calculated is applicable, for example, its power calculation algorithms is with calculating public space CCE's
Method.
Step 204：Calculate current TTI PHICH REG quantity.
In this step, in the current TTI of calculating PHICH REG quantity, the embodiment of the present invention to circular not
It is limited, the method for any REG quantity that can calculate PHICH is applicable, for example, its computational methods is in LTE protocol
36.211 in have clear and definite regulation.
Further, in this step, while current TTI PHICH REG quantity is calculated, it can also calculate and work as
Preceding TTI PHICH use power.Correspondingly, circular is not limited in the embodiment of the present invention, Ren Heneng
The method for enough calculating PHICH use power is applicable, for example, its power calculation algorithms is with the side for calculating public space CCE
Method.
Step 201 to step 204 is performed both by after finishing, and performs step 205 and step 206, wherein, step 205 and step
206 execution sequence is unrestricted.
Step 205：Calculate aperiodicity REG quantity and periodicity REG quantity sums.
In this step, aperiodicity REG quantity and periodicity REG quantity sums are calculated, specifically, counting statistics is obtained
Predetermined period in the PDCCH CCE REG quantity in proprietary space, the CCE of PDCCH public space REG quantity,
PCFICH REG quantity, PHICH REG quantity and reserved CCE sums.
Step 206：Calculate the CCE in PDCCH proprietary space use power, the CCE of PDCCH public space use
Power, PCFICH use power, PHICH use power and reserved power sum.
The CCE in the proprietary space of the PDCCH described in each step of embodiment of the present invention REG quantity and use work(
Rate, the CCE of PDCCH public space REG quantity and using power, PCFICH REG quantity and use power, PHICH
REG quantity and the use of power is the above-mentioned respective physical amount in current TTI, it is current that power is reserved described in step 206
TTI reserved power.
After the completion of step 205 and step 206 are equal, step 207 is performed.
Step 207：Calculate PDCCH symbolic number.
In this step, PDCCH symbolic number is calculated, PDCCH symbolic number is that control format is indicated（Control
Format Indicator, abbreviation CFI）Indicated symbolic number.The specific method of this step can be used：According to aperiodicity
REG quantity and periodicity REG quantity sums, calculate PDCCH symbolic number.Further, according to aperiodicity REG quantity and week
The specific method that phase property REG quantity sum calculates PDCCH symbolic number can be used：According to the aperiodicity REG quantity with
The periodicity REG quantity sums, and according to the public affairs of the CCE in the proprietary space of PDCCH use power, the PDCCH
The CCE of cospace use power, the use power of the PCFICH, the use power of the PHICH and reserved power sum,
Calculate the symbolic number of the PDCCH.Correspondingly, circular is not limited in the embodiment of the present invention, it is any being capable of root
According to aperiodicity REG quantity and periodicity REG quantity sum and the CCE in PDCCH proprietary space use power, PDCCH
CCE use power, PCFICH use power, the PHICH use power of public space calculated with reserved power sum
The method of PDCCH symbolic number is applicable, for example, calculating above-mentioned symbolic number and using the method for power referring to LTE protocol
36.211 and the supporting Remote Radio Unit in base station（Radio Remote Unit, abbreviation RRU）Technical parameter.
In the embodiment of the present invention two, only count the CCE in PDCCH proprietary space REG quantity and use power, for
PDCCH CCE public space, PCFICH and PHICH REG quantity and power is used, obtained by the way of calculating, according to
The CCE of the REG quantity in PDCCH CCE proprietary space and PDCCH public space REG quantity sums, and according to described
The CCE in PDCCH proprietary space use power, the CCE of the public space of PDCCH use power, the PCFICH
Use power, the use power of the PHICH and reserved power sum, the symbolic number of the PDCCH is calculated, so as to avoid
Paroxysmal group paging is to setting the adverse effects of PDCCH symbolic numbers, and to having carried out adaptive adjustment using power, from
And improve the adaptive accuracy of PDCCH symbolic numbers.
Fig. 3 is the eNB of the embodiment of the present invention three structural representation.As shown in figure 3, the eNB at least includes：Aperiodicity
Symbolic number statistic unit 31, periodic symbols number computing unit 32, total symbolic number computing unit 33.
Wherein, aperiodicity symbolic number statistic unit 31, the non-week that the PDCCH for counting in predetermined period is used
Phase property resource element groups REG quantity.
Periodic symbols number computing unit 32, for calculating the week that the current transmission time interval TTI PDCCH is used
Phase property REG quantity.
Total symbolic number computing unit 33, for according to the aperiodicity REG quantity and the periodicity REG quantity it
With the current TTI of calculating PDCCH symbolic number.
On the basis of above-mentioned technical proposal, further, the aperiodicity REG statistic units are pre- specifically for statistics
If the control channel element CCE in the proprietary space of the PDCCH in cycle REG quantity.
On the basis of above-mentioned technical proposal, further, the periodicity REG computing units are current specifically for calculating
The CCE of TTI PDCCH public space REG quantity, Physical Control Format Indicator Channel PCFICH REG quantity with
Physical hybrid automatic repeat request indicator channel PHICH REG quantity sums.
On the basis of above-mentioned technical proposal, further, above-mentioned eNB can also include：Aperiodicity power statistic list
Member 34 and periodic power computing unit 35.Wherein, the aperiodicity power statistic unit 34 is used to count the default week
The CCE in the proprietary space of the PDCCH in phase use power.The periodic power computing unit 35 is used to calculate current
The use of the CCE of TTI PDCCH public space use power, the use power of the PCFICH and the PHICH
Power.Correspondingly, total symbolic number computing unit 33 is specifically for according to the aperiodicity REG quantity and the periodicity
REG quantity sums, and according to the CCE in the proprietary space of PDCCH use power, the CCE of the public space of the PDCCH
Use power, the use power of the PCFICH, the use power of the PHICH and reserved power sum, calculate described
PDCCH symbolic number.
The eNB of the embodiment of the present invention three can be used for performing described in the embodiment of the present invention one and the embodiment of the present invention two
PDCCH symbolic number adaptive approach, it implements process and technique effect is referred to the embodiment of the present invention one and the present invention
Embodiment two, here is omitted.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of physical downlink control channel PDCCH symbolic number adaptive approach, it is characterised in that including：
The aperiodicity resource element groups REG quantity that the PDCCH in statistics predetermined period is used；
Calculate the periodicity REG quantity that the current transmission time interval TTI PDCCH is used；
According to the aperiodicity REG quantity and the periodicity REG quantity sums, current TTI PDCCH symbol is calculated
Number.
2. according to the method described in claim 1, it is characterised in that what the PDCCH in the statistics predetermined period was used
Aperiodicity REG quantity includes：
The control channel element CCE in the proprietary space of the PDCCH in statistics predetermined period REG quantity.
3. method according to claim 1 or 2, it is characterised in that what the PDCCH of the current TTI of calculating was used
Periodicity REG quantity includes：
Calculate the CCE of current TTI PDCCH public space REG quantity, Physical Control Format Indicator Channel PCFICH
REG quantity and physical hybrid automatic repeat request indicator channel PHICH REG quantity sums.
4. method according to claim 3, it is characterised in that
Methods described also includes：Count the CCE in the proprietary space of the PDCCH in predetermined period use power；Meter
Calculate the CCE of current TTI PDCCH public space use power, the use power of the PCFICH and the PHICH
Use power；
The symbolic number that the PDCCH is calculated according to the aperiodicity REG quantity and the periodicity REG quantity sums
Including：According to the aperiodicity REG quantity and the periodicity REG quantity sums, and according to the proprietary space of the PDCCH
The CCE use power, CCE of the public space of PDCCH use power, the use power of the PCFICH, described
PHICH use power and reserved power sum, calculate the symbolic number of the PDCCH.
5. a kind of base station eNB, it is characterised in that including：
Aperiodicity symbolic number statistic unit, the aperiodicity resource element groups that the PDCCH for counting in predetermined period is used
REG quantity；
Periodic symbols number computing unit, for calculating the periodicity that the current transmission time interval TTI PDCCH is used
REG quantity；
Total symbolic number computing unit, for according to the aperiodicity REG quantity and the periodicity REG quantity sums, calculating
Current TTI PDCCH symbolic number.
6. eNB according to claim 5, it is characterised in that
Control of the aperiodicity symbolic number statistic unit specifically for the proprietary space of the PDCCH in statistics predetermined period
Channel element CCE processed REG quantity.
7. the eNB according to claim 5 or 6, it is characterised in that
The periodic symbols number computing unit is specifically for the CCE's of the current TTI of calculating PDCCH public space
REG quantity, Physical Control Format Indicator Channel PCFICH REG quantity and physical hybrid automatic repeat request indicator channel
PHICH REG quantity sums.
8. eNB according to claim 7, it is characterised in that
Also include：Aperiodicity power statistic unit and periodic power computing unit；
The aperiodicity power statistic unit is used for the CCE for counting the proprietary space of the PDCCH in the predetermined period
Use power；
The periodic power computing unit is used for the use work(for calculating the CCE of current TTI PDCCH public space
The use power of rate, the use power of the PCFICH and the PHICH；
Total symbolic number computing unit specifically for according to the aperiodicity REG quantity and the periodicity REG quantity it
With, and according to the CCE in the proprietary space of PDCCH use power, the CCE of the public space of PDCCH use work(
Rate, the use power of the PCFICH, the use power of the PHICH and reserved power sum, calculate the symbol of the PDCCH
Number.
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