CN104348572A - Physical downlink control channel (PDCCH) symbolic number self-adaptive method and base station - Google Patents
Physical downlink control channel (PDCCH) symbolic number self-adaptive method and base station Download PDFInfo
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- CN104348572A CN104348572A CN201310313755.2A CN201310313755A CN104348572A CN 104348572 A CN104348572 A CN 104348572A CN 201310313755 A CN201310313755 A CN 201310313755A CN 104348572 A CN104348572 A CN 104348572A
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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 invention provides a physical downlink control channel (PDCCH) symbolic number self-adaptive method and a base station. The method comprises: counting the quantity of aperiodical resource element groups (REGs) used by a PDCCH in a preset period; calculating the quantity of periodical REGs used by the PDCCH at a current transmission time interval (TTI); and according to the sum of the quantity of aperiodical REGs and the quantity of the periodical REGs, calculating the symbolic number of the PDCCH of the current TTI. By using the PDCCH symbolic number self-adaptive method and the base station, the symbolic number self-adaptive accuracy of the PDCCH can be improved.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of Physical Downlink Control Channel (Physical Downlink Control Channel is called for short PDCCH) symbolic number adaptive approach and base station (evolved Node B is called for short eNB).
Background technology
The number of PDCCH symbolic number, not only affect Physical Downlink Shared Channel (Physical Downlink Shared Channel, be called for short PDSCH) for the symbolic number of transfer of data, but also directly determine the number of users that present sub-frame can be authorized, therefore, in communication process, eNB is according to controlling channel element (Control Channel Element in the nearest cycle, be called for short CCE) service condition estimate PDCCH symbolic number, to realize the self-adaptative adjustment of PDCCH symbolic number.
At present, PDCCH symbolic number adaptive approach is: the subframe in a radio frames classified, the service condition of the CCE of all kinds of subframe is added up a predetermined period, for a certain class subframe, if the CCE residue of current transmission time interval (Transmission Time Interval is called for short TTI) reaches a symbol, then statistics adds one, if the CCE residue of current TTI is less than a symbol, then statistics resets; If occur, CCE distributes unsuccessfully, and record CCE distributes unsuccessfully; At the beginning of a new TTI, for the type of each subframe, check above-mentioned statistics, if there is CCE to distribute failure record, and current sign number does not reach maximum, then in above-mentioned new TTI, PDCCH symbolic number increases a symbol, if the statistics number that the CCE residue of TTI reaches a symbol reaches preset value, and current sign number is not minimum, then in above-mentioned new TTI, PDCCH symbolic number reduces by a symbol.
In public network, the method adopting the above-mentioned existing PDCCH of setting symbolic number is rational; But in private network, group paging periodically uses public space CCE, power drain is higher, often occurs that PDCCH symbolic number is just shunk, again because the arrival of group paging causes CCE not enough, thus cause this to dispatch unsuccessfully, further, this is dispatched and unsuccessfully causes again PDCCH symbolic number to be expanded, and after this scheduling, need again to wait for that a predetermined period could shrink PDCCH symbol again, thus cause the operable symbolic number of PDSCH before PDCCH symbol shrinks to reduce.Therefore, adopt existing PDCCH symbolic number adaptive approach, PDCCH symbolic number is shunk or is expanded not in time, the poor accuracy of the PDCCH symbolic number of setting.
Summary of the invention
First aspect of the present invention is to provide a kind of PDCCH symbolic number adaptive approach, in order to solve defect of the prior art, improves the adaptive accuracy of PDCCH symbolic number.
Another aspect of the present invention is to provide a kind of eNB, in order to solve defect of the prior art, improves the adaptive accuracy of PDCCH symbolic number.
First aspect of the present invention is to provide a kind of physical downlink control channel PDCCH symbolic number adaptive approach, comprising:
The aperiodicity resource element group REG quantity that described PDCCH in statistics predetermined period uses;
The periodicity REG quantity that the described PDCCH calculating current transmission time interval TTI uses;
According to described aperiodicity REG quantity and described periodicity REG quantity sum, calculate the symbolic number of the described PDCCH of current TTI.
Method as above, wherein, the aperiodicity REG quantity that the described PDCCH in described statistics predetermined period uses comprises:
The REG quantity of the control channel Elements C CE in the proprietary space of the described PDCCH in statistics predetermined period.
Method as above, wherein, the periodicity REG quantity that the described PDCCH of described calculating current TTI uses comprises:
Calculate the REG quantity sum of the REG quantity of CCE of the public space of the described PDCCH of current TTI, the REG quantity of Physical Control Format Indicator Channel PCFICH and physical hybrid automatic repeat request indicator channel PHICH.
Method as above, wherein,
Described method also comprises: the use power adding up the CCE in the proprietary space of the described PDCCH in described predetermined period; Calculate the use power of the use power of CCE of the public space of the described PDCCH of current TTI, the use power of described PCFICH and described PHICH;
Described according to described aperiodicity REG quantity and described periodicity REG quantity sum, the symbolic number calculating described PDCCH comprises: according to described aperiodicity REG quantity and described periodicity REG quantity sum, and according to the use power of the CCE of the use power of the CCE in the proprietary space of described PDCCH, the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH.
Another aspect of the present invention is to provide a kind of base station eNB, comprising:
Aperiodicity symbolic number statistic unit, the aperiodicity resource element group REG quantity that the described PDCCH for adding up in predetermined period uses;
Periodic symbols number computing unit, the periodicity REG quantity that the described PDCCH for calculating current transmission time interval TTI uses;
Total symbolic number computing unit, for according to described aperiodicity REG quantity and described periodicity REG quantity sum, calculates the symbolic number of the described PDCCH of current TTI.
ENB as above, wherein,
Described aperiodicity REG statistic unit is specifically for the REG quantity of the control channel Elements C CE in the proprietary space of the described PDCCH in statistics predetermined period.
ENB as above, wherein,
Described periodicity REG computing unit is specifically for calculating the REG quantity sum of the REG quantity of CCE of public space of the described PDCCH of current TTI, the REG quantity of Physical Control Format Indicator Channel PCFICH and physical hybrid automatic repeat request indicator channel PHICH.
ENB as above, wherein,
Also comprise: aperiodicity power statistic unit and periodic power computing unit;
Described aperiodicity power statistic unit is for adding up the use power of the CCE in the proprietary space of the described PDCCH in described predetermined period;
Described periodic power computing unit is for calculating the use power of the use power of the CCE of the public space of the described PDCCH of current TTI, the use power of described PCFICH and described PHICH;
Described total symbolic number computing unit is specifically for according to described aperiodicity REG quantity and described periodicity REG quantity sum, and according to the use power of the CCE of the use power of the CCE in the proprietary space of described PDCCH, the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH.
From foregoing invention content, only add up the aperiodicity REG quantity of PDCCH use, the periodicity REG quantity used for PDCCH adopts the mode calculated to obtain, and calculates the symbolic number of PDCCH according to aperiodicity REG quantity and periodicity REG quantity sum.Because group paging has periodic characteristics, and the periodicity of group paging is variable, therefore in prior art to the mode that the overall symbol number of PDCCH is added up, measurement period cannot be consistent with the cycle of group paging, cause the symbolic number poor accuracy of PDCCH, adopt the method for the embodiment of the present invention one, for aperiodicity REG quantity, the method to adding up in the first cycle is adopted to obtain, for periodicity REG quantity, adopt and the mode that current TTI calculates is obtained, finally obtain PDCCH symbolic number according to aperiodicity REG quantity and periodicity REG quantity sum, thus to avoid when adopting the overall statistical method of prior art paroxysmal group paging to the adverse effect arranging PDCCH symbolic number, improve the adaptive accuracy of PDCCH symbolic number.
Accompanying drawing explanation
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 structural representation of the eNB of the embodiment of the present invention three.
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, the method comprises following process.
Step 101: aperiodicity resource element group (Resource Element Group the is called for short REG) quantity that the PDCCH in statistics predetermined period uses.
Step 102: the periodicity REG quantity that the described PDCCH calculating current TTI uses.
Step 103: according to described aperiodicity REG quantity and described periodicity REG quantity sum, calculates the symbolic number of the described PDCCH of current TTI.
In the embodiment of the present invention one, only add up the aperiodicity REG quantity of PDCCH use, the periodicity REG quantity used for PDCCH adopts the mode calculated to obtain, and calculates the symbolic number of PDCCH according to aperiodicity REG quantity and periodicity REG quantity sum.Because group paging has periodic characteristics, and the periodicity of group paging is variable, therefore the mode that the overall symbol number of PDCCH is added up of prior art, measurement period cannot be consistent with the cycle of group paging, cause the symbolic number poor accuracy of PDCCH, adopt the method for the embodiment of the present invention one, for aperiodicity REG quantity, the method to adding up in the first cycle is adopted to obtain, for periodicity REG quantity, adopt and the mode that current TTI calculates is obtained, finally obtain PDCCH symbolic number according to aperiodicity REG quantity and periodicity REG quantity sum, thus to avoid when adopting the overall statistical method of prior art paroxysmal group paging to the adverse effect arranging PDCCH symbolic number, improve the adaptive accuracy of PDCCH symbolic number.
Fig. 2 is the flow chart of the PDCCH symbolic number adaptive approach of the embodiment of the present invention two.As shown in Figure 2, the method comprises following process.
Step 201: the REG quantity of the control channel element (Control Channel Element is called for short CCE) in the proprietary space of the PDCCH in statistics predetermined period.
In this step, the aperiodicity REG quantity that the PDCCH in statistics predetermined period uses, concrete grammar is, the REG quantity of the CCE in the proprietary space of the PDCCH in statistics predetermined period.Wherein, described predetermined period can be selected flexibly according to actual conditions, can arrange little as far as possible by the numerical value of this predetermined period.
Further, in this step, while the REG quantity of the CCE in the proprietary space of the PDCCH in statistics predetermined period, the use power of the CCE in the proprietary space of the described PDCCH in described predetermined period can also be added up.
The method also comprises: the periodicity REG quantity that the described PDCCH calculating current TTI uses, concrete grammar is: the REG quantity, Physical Control Format Indicator Channel (the Physical Control Format Indicator Channel that calculate the CCE of the public space of the described PDCCH of current TTI, be called for short PCFICH) the REG quantity sum of REG quantity and physical hybrid automatic repeat request indicator channel (Physical Hybrid Automatic Retransmission Request Indicator Channel, abbreviation PHICH).Further, in the process of the periodicity REG quantity used at the described PDCCH calculating current TTI, the use power of the CCE in the proprietary space of the PDCCH of current TTI, the use power of CCE of the public space of PDCCH, the use power of PCFICH, the use power of PHICH and reserved power sum can also be calculated.Particularly, the above-mentioned process of calculating REG quantity sum and the process of rated output sum can comprise the following steps 202 to step 204.Step 201 is unrestricted to the execution sequence of step 204.
Step 202: the REG quantity calculating the CCE of the public space of the described PDCCH of current TTI.
In this step, calculate the REG quantity of the CCE of the public space of the described PDCCH of current TTI, in the embodiment of the present invention, circular is not limited, any method that can calculate the REG quantity of the CCE of the public space of PDCCH is all applicable, such as, system message and paging are read can according to Long Term Evolution (Long Term Evolution, be called for short LTE) 36.331 agreements and relevant calculating is set, power control and group can arrange according to its cycle and calculate, accidental access response (Random Access Response, be called for short RAR) then can by receiving random access radio network temporary mark (Radio Network Temporary Identifier, be called for short RNTI) calculate the transmission RAR moment.
Further, in this step, while the REG quantity of the CCE of the public space of the described PDCCH of calculating current TTI, the use power of the CCE of the public space of the described PDCCH of current TTI can also be calculated.Correspondingly, in the embodiment of the present invention, circular is not limited, any method that can calculate the use power of the CCE of the public space of PDCCH is all applicable, such as, according to public space reference signal (Reference Signal, be called for short RS) power setting, calculate the power required for single CCE, then calculate the power required for public space CCE by public space CCE number.
Step 203: the REG quantity calculating the PCFICH of current TTI.
In this step, calculate the REG quantity of PCFICH of current TTI, do not limit in the embodiment of the present invention to circular, any method that can calculate the REG quantity of PCFICH is all applicable, and such as, its quantity has clear and definite regulation in LTE protocol 36.211
Further, in this step, while the REG quantity of PCFICH calculating current TTI, the use power of the described PCFICH of current TTI can also be calculated.Correspondingly, do not limit in the embodiment of the present invention to circular, any method that can calculate the use power of PCFICH is all applicable, and such as, its power calculation algorithms is with the method calculating public space CCE.
Step 204: the REG quantity calculating the PHICH of current TTI.
In this step, calculate the REG quantity of PHICH of current TTI, do not limit in the embodiment of the present invention to circular, any method that can calculate the REG quantity of PHICH is all applicable, such as, its computational methods have clear and definite regulation in LTE protocol 36.211.
Further, in this step, while the REG quantity of PHICH calculating current TTI, the use power of the described PHICH of current TTI can also be calculated.Correspondingly, do not limit in the embodiment of the present invention to circular, any method that can calculate the use power of PHICH is all applicable, and such as, its power calculation algorithms is with the method calculating public space CCE.
After step 201 to step 204 is all finished, perform step 205 and step 206, wherein, step 205 is unrestricted with the execution sequence of step 206.
Step 205: calculate aperiodicity REG quantity and periodicity REG quantity sum.
In this step, calculate aperiodicity REG quantity and periodicity REG quantity sum, particularly, the REG quantity of CCE in proprietary space of PDCCH in the predetermined period that obtains of counting statistics, the REG quantity of the CCE of the public space of PDCCH, the REG quantity of PCFICH, the REG quantity of PHICH and reserved CCE sum.
Step 206: the use power of CCE in proprietary space of calculating PDCCH, the use power of the CCE of the public space of PDCCH, the use power of PCFICH, the use power of PHICH and reserved power sum.
The REG quantity of the CCE in the proprietary space of the PDCCH described in each step of the embodiment of the present invention is with the REG quantity of the CCE of the public space of use power, PDCCH and use the REG quantity of power, PCFICH and use the REG quantity of power, PHICH and use power to be the above-mentioned respective physical amount in current TTI, reserves the reserved power that power is current TTI described in step 206.
After step 205 and step 206 all complete, perform step 207.
Step 207: the symbolic number calculating PDCCH.
In this step, calculate the symbolic number of PDCCH, the symbolic number of PDCCH and the symbolic number indicated by control format instruction (Control Format Indicator is called for short CFI).The concrete grammar of this step can adopt: according to aperiodicity REG quantity and periodicity REG quantity sum, calculate the symbolic number of PDCCH.Further, can adopt according to the concrete grammar that aperiodicity REG quantity and periodicity REG quantity sum calculate the symbolic number of PDCCH: according to described aperiodicity REG quantity and described periodicity REG quantity sum, and according to the use power of the CCE of the use power of the CCE in the proprietary space of described PDCCH, the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH.Correspondingly, in the embodiment of the present invention, circular is not limited, any can according to the use power of aperiodicity REG quantity with the periodically CCE in the proprietary space of REG quantity sum and PDCCH, the use power of the CCE of the public space of PDCCH, the use power of PCFICH, the method that the use power of PHICH and reserved power sum calculate the symbolic number of PDCCH is all applicable, such as, calculate above-mentioned symbolic number and use the method for power see LTE protocol 36.211 and supporting Remote Radio Unit (the Radio Remote Unit in base station, be called for short RRU) technical parameter.
In the embodiment of the present invention two, only add up the REG quantity of the CCE in the proprietary space of PDCCH and use power, for the public space of the CCE of PDCCH, the REG quantity of PCFICH and PHICH and use power, the mode calculated is adopted to obtain, according to the REG quantity sum of the CCE of the REG quantity in the proprietary space of the CCE of PDCCH and the public space of PDCCH, and the use power of CCE according to the proprietary space of described PDCCH, the use power of the CCE of the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH, thus avoid paroxysmal group paging to the adverse effect arranging PDCCH symbolic number, and self-adaptative adjustment has been carried out to use power, thus improve the adaptive accuracy of PDCCH symbolic number.
Fig. 3 is the structural representation of the eNB of the embodiment of the present invention three.As shown in Figure 3, this eNB at least comprises: 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 aperiodicity resource element group REG quantity that the described PDCCH for adding up in predetermined period uses.
Periodic symbols number computing unit 32, the periodicity REG quantity that the described PDCCH for calculating current transmission time interval TTI uses.
Total symbolic number computing unit 33, for according to described aperiodicity REG quantity and described periodicity REG quantity sum, calculates the symbolic number of the described PDCCH of current TTI.
On the basis of technique scheme, further, described aperiodicity REG statistic unit is specifically for the REG quantity of the control channel Elements C CE in the proprietary space of the described PDCCH in statistics predetermined period.
On the basis of technique scheme, further, described periodicity REG computing unit is specifically for calculating the REG quantity sum of the REG quantity of CCE of public space of the described PDCCH of current TTI, the REG quantity of Physical Control Format Indicator Channel PCFICH and physical hybrid automatic repeat request indicator channel PHICH.
On the basis of technique scheme, further, above-mentioned eNB can also comprise: aperiodicity power statistic unit 34 and periodic power computing unit 35.Wherein, described aperiodicity power statistic unit 34 is for adding up the use power of the CCE in the proprietary space of the described PDCCH in described predetermined period.Described periodic power computing unit 35 is for calculating the use power of the use power of the CCE of the public space of the described PDCCH of current TTI, the use power of described PCFICH and described PHICH.Correspondingly, described total symbolic number computing unit 33 is specifically for according to described aperiodicity REG quantity and described periodicity REG quantity sum, and according to the use power of the CCE of the use power of the CCE in the proprietary space of described PDCCH, the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH.
The eNB of the embodiment of the present invention three may be used for performing the embodiment of the present invention one and the PDCCH symbolic number adaptive approach described in the embodiment of the present invention two, its specific implementation process and technique effect with reference to the embodiment of the present invention one and the embodiment of the present invention two, can repeat no more herein.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a physical downlink control channel PDCCH symbolic number adaptive approach, is characterized in that, comprising:
The aperiodicity resource element group REG quantity that described PDCCH in statistics predetermined period uses;
The periodicity REG quantity that the described PDCCH calculating current transmission time interval TTI uses;
According to described aperiodicity REG quantity and described periodicity REG quantity sum, calculate the symbolic number of the described PDCCH of current TTI.
2. method according to claim 1, is characterized in that, the aperiodicity REG quantity that the described PDCCH in described statistics predetermined period uses comprises:
The REG quantity of the control channel Elements C CE in the proprietary space of the described PDCCH in statistics predetermined period.
3. method according to claim 1 and 2, is characterized in that, the periodicity REG quantity that the described PDCCH of described calculating current TTI uses comprises:
Calculate the REG quantity sum of the REG quantity of CCE of the public space of the described PDCCH of current TTI, the REG quantity of Physical Control Format Indicator Channel PCFICH and physical hybrid automatic repeat request indicator channel PHICH.
4. method according to claim 3, is characterized in that,
Described method also comprises: the use power adding up the CCE in the proprietary space of the described PDCCH in described predetermined period; Calculate the use power of the use power of CCE of the public space of the described PDCCH of current TTI, the use power of described PCFICH and described PHICH;
Described according to described aperiodicity REG quantity and described periodicity REG quantity sum, the symbolic number calculating described PDCCH comprises: according to described aperiodicity REG quantity and described periodicity REG quantity sum, and according to the use power of the CCE of the use power of the CCE in the proprietary space of described PDCCH, the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH.
5. a base station eNB, is characterized in that, comprising:
Aperiodicity symbolic number statistic unit, the aperiodicity resource element group REG quantity that the described PDCCH for adding up in predetermined period uses;
Periodic symbols number computing unit, the periodicity REG quantity that the described PDCCH for calculating current transmission time interval TTI uses;
Total symbolic number computing unit, for according to described aperiodicity REG quantity and described periodicity REG quantity sum, calculates the symbolic number of the described PDCCH of current TTI.
6. eNB according to claim 5, is characterized in that,
Described aperiodicity REG statistic unit is specifically for the REG quantity of the control channel Elements C CE in the proprietary space of the described PDCCH in statistics predetermined period.
7. the eNB according to claim 5 or 6, is characterized in that,
Described periodicity REG computing unit is specifically for calculating the REG quantity sum of the REG quantity of CCE of public space of the described PDCCH of current TTI, the REG quantity of Physical Control Format Indicator Channel PCFICH and physical hybrid automatic repeat request indicator channel PHICH.
8. eNB according to claim 7, is characterized in that,
Also comprise: aperiodicity power statistic unit and periodic power computing unit;
Described aperiodicity power statistic unit is for adding up the use power of the CCE in the proprietary space of the described PDCCH in described predetermined period;
Described periodic power computing unit is for calculating the use power of the use power of the CCE of the public space of the described PDCCH of current TTI, the use power of described PCFICH and described PHICH;
Described total symbolic number computing unit is specifically for according to described aperiodicity REG quantity and described periodicity REG quantity sum, and according to the use power of the CCE of the use power of the CCE in the proprietary space of described PDCCH, the public space of described PDCCH, the use power of described PCFICH, the use power of described PHICH and reserved power sum, calculate the symbolic number of described PDCCH.
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| WO2018187931A1 (en) * | 2017-04-11 | 2018-10-18 | Oppo广东移动通信有限公司 | Downlink control channel configuration method, network device, and terminal |
| CN110495119A (en) * | 2017-04-11 | 2019-11-22 | Oppo广东移动通信有限公司 | Configuration method and the network equipment, the terminal of down control channel |
| CN110495119B (en) * | 2017-04-11 | 2021-01-15 | Oppo广东移动通信有限公司 | Configuration method of downlink control channel, network equipment and terminal |
| US11166304B2 (en) | 2017-04-11 | 2021-11-02 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Downlink control channel configuration method, network device, and terminal |
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