CN101115300B - Method and device for adjusting and extending BCCH channel of broadcast control channel - Google Patents
Method and device for adjusting and extending BCCH channel of broadcast control channel Download PDFInfo
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Abstract
The invention discloses a method and a device to adjust an expansion broadcast control channel BCCH channel, the method comprises: gaining the occupied condition of the current district channel; comparing the occupied condition of the current district channel with the presetting threshold to conform the channel demand; a base stage controller adjusts the expansion BCCH channel according to the channel demand. Through the base stage controller adjusting the expansion BCCH channel, the unreasonable issue of the channel configuration can be effectively prevented, and the reasonable configuration of the district channel can be achieved.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method, device of adjusting extending BCCH channel of broadcast control channel.
Background technology
Along with the GSM network is constantly popularized, the number of users of GSM network also is on the increase, and network load constantly raises, and makes operator more in the past than the utilance of more paying attention to device resource, more pays attention to the bearing capacity of network to the high traffic and the high traffic that happens suddenly.
The paging capability in current position district, the access capability of sub-district have become constraint sub-district and base station controller (Base Station Controller, BSC) one of main bottleneck of traffic load, the main Broadcast Control Channel of sub-district (Broadcast Control Channel, BCCH) comprise Common Control Channel (Common ControlChannel, CCCH) and Broadcast Control Channel, wherein, the quantity of CCCH channel has determined the paging capability of lane place and the access capability of sub-district, influences the traffic load situation of sub-district.
At present, the GSM network solves cell telephone traffic load bottleneck problem by expansion BCCH channel, expansion BCCH channel comprises BCCH channel and CCCH channel, changes the quantity of CCCH channel by increasing or reduce expansion BCCH channel, thereby changes the load capacity of the CCCH channel of sub-district.Implementation procedure is: the attendant is regularly to base station (Base Transceiver Station, BTS) or BSC obtain the CCCH channel load situation of current area, issue the decision of adjusting expansion BCCH channel (increase expansion BCCH channel or reduce expansion BCCH channel quantity) to BSC according to current CCCH channel load situation, BSC is after receiving the indication of adjusting expansion BCCH channel, issue the instruction of adjusting expansion BCCH channel and give BTS, BTS adjusts expansion BCCH channel according to instruction; In addition, BSC revises system message, and the system message after revising is sent to BTS, and BTS is in the new system message of Um mouth issue.
In the invention process, the inventor finds prior art, and there are the following problems at least: the adjustment of expanding the BCCH channel at present is to realize by Artificial Control, and work as network under the bigger situation of the changes in demand fluctuation of CCCH channel, prior art can not reasonable disposition the quantity of expansion BCCH channel, as, when expansion BCCH channel configuration is too much, can cause the wasting of resources, when expansion BCCH channel configuration is very few, the cell channel load is higher, easily causes congested.
The inventor also finds, as, after the CCCH channel quantity changes, if the user does not receive the new system message of BTS in the issue of Um mouth timely, perhaps, cause not having in time adjusting the paging subchannel of monitoring, the problem of call loss can occur because user's modification paging subchannel speed is slow.
Summary of the invention
The embodiment of the invention provides a kind of method, device of adjusting extending BCCH channel of broadcast control channel, realizes the dynamic adjustment of expansion BCCH channel, in order to solve the irrational problem of expansion BCCH channel configuration.
The embodiment of the invention provides a kind of method of adjusting extending BCCH channel of broadcast control channel, and this method comprises: obtain current area CCCH channel occupancy situation; More described current area CCCH channel occupancy situation and the threshold value that presets to be to determine the CCCH channel demands, obtains current area CCCH channel occupancy situation, comparison current area CCCH channel occupancy situation and the main body of the threshold value that presets is base station or base station controller; Base station controller is according to described channel demands adjustment expansion BCCH channel.Wherein, current area CCCH channel occupancy situation comprises the CCCH channel load, and the threshold value that presets comprises CCCH channel load upper and lower bound; Perhaps, current area CCCH channel occupancy situation comprises CCCH channel load and local resource utilance, and the threshold value that presets comprises the CCCH channel load upper limit, lower limit and the local resource utilance upper limit, lower limit.
The embodiment of the invention provides a kind of device of adjusting extending BCCH channel of broadcast control channel, and this device comprises: acquiring unit is used to obtain sub-district CCCH channel occupancy situation; Comparing unit is used for: sub-district CCCH channel occupancy situation that relatively acquiring unit obtained and the threshold value that presets, determine the CCCH channel demands; The channel adjustment unit is used for the channel according to the determined channel demands adjustment expansion of comparing unit BCCH.Wherein, sub-district CCCH channel occupancy situation comprises the CCCH channel load, and the threshold value that presets comprises CCCH channel load upper and lower bound; Perhaps, sub-district CCCH channel occupancy situation comprises CCCH channel load and local resource utilance, and the threshold value that presets comprises the CCCH channel load upper limit, lower limit and the local resource utilance upper limit, lower limit.
The beneficial effect that the embodiment of the invention disclosed is: by obtaining channel demands, base station controller is in time adjusted expansion BCCH channel, has solved the irrational problem of expansion BCCH channel configuration.Simultaneously, after expansion BCCH channel adjustment,, solved the problem of call loss in the channel adjustment process by the time-delay of channel occupation mode.
Description of drawings
Fig. 1 is the flow chart of embodiment of the present invention 1;
Fig. 2 is the flow chart of embodiment of the present invention 2;
Fig. 3 is the flow chart of embodiment of the present invention 3;
Fig. 4 is the flow chart of embodiment of the present invention 4;
Fig. 5 is the flow chart of embodiment of the present invention 5;
Fig. 6 is the flow chart of embodiment of the present invention 6;
Fig. 7 is the structure drawing of device of embodiment of the invention adjustment expansion BCCH channel.
Embodiment
In the embodiment of the invention, by the preset gate limit value, relatively current area channel occupancy situation and threshold value obtain the demand situation of CCCH channel, according to channel demands adjustment expansion BCCH channel.If preset gate limit value on the base station, comparison current area channel occupancy situation and threshold value that the base station is real-time, and with the channel demands situation informing base station controller that relatively draws, base station controller is according to channel demands adjustment expansion BCCH channel.If preset gate limit value on base station controller, the cell channel that base station controller comparison base station reports take situation and the threshold value that presets, according to the channel demands situation adjustment expansion BCCH channel that relatively obtains.The threshold value that presets is a CCCH channel load threshold value, also can comprise CCCH channel load threshold value and other threshold values, such as CCCH channel load threshold value and cell channel resource utilization (hereinafter to be referred as the local resource utilance), consider that simultaneously the utilance of CCCH channel load situation and local resource can make the adjustment of expansion BCCH channel more reasonable.Below lifting specific embodiment further specifies: referring to Fig. 1, be depicted as the flow chart of embodiment of the present invention 1, concrete steps comprise:
The load value of step S101, BSC inquiry current C CCH channel;
Step S102, BSC compare the load value of current C CCH channel and the CCCH channel load thresholding that presets, wherein CCCH channel load thresholding comprises upper and lower bound, judge whether current C CCH channel load value is higher than the CCCH channel load upper limit, if, execution in step S105 then, if not, execution in step S103 then;
Step S105, BSC notice BTS increases expansion BCCH channel;
Step S103, BSC judge whether current C CCH channel load value is less than or equal to CCCH channel load lower limit, if, execution in step S106 then, if not, execution in step S104 then;
Step S106, BSC notice BTS reduces expansion BCCH channel;
Step S104, do not do channel adjustment.Promptly prescribe a time limit greater than CCCH channel load lower limit and on, do not do channel adjustment less than the CCCH channel load in current C CCH channel load value.
In the above step, the current C CCH channel load value of step 101 sends to BSC by BTS, the main body of step S101, S102, S103 can also be BTS, and when the main body of step S101, S102, S103 was BTS, the result that BTS will judge after step S102, S103 sent to BSC.
Wherein, BSC compares the step of load value with the CCCH channel load thresholding that presets of current C CCH channel, promptly can not have sequencing between step 103 and the step 104, concrete as following examples, referring to Fig. 2, be depicted as the flow chart of embodiment of the present invention 2, concrete steps comprise:
The load value of step S201, BSC inquiry current C CCH channel;
Step S202, BSC compare the load value of current C CCH channel and the CCCH channel load thresholding that presets, wherein CCCH channel load thresholding comprises upper and lower bound, judge whether current C CCH channel load value is less than or equal to CCCH channel load lower limit, if, execution in step S205 then, if not, execution in step S203 then;
Step S205, BSC notice BTS reduces expansion BCCH channel;
Whether step S203, BSC judge current C CCH channel load value more than or equal to the CCCH channel load upper limit, if, execution in step S206 then, if not, execution in step S204 then;
Step S206, BSC notice BTS increases expansion BCCH channel;
Step S204, do not do channel adjustment.Promptly prescribe a time limit greater than CCCH channel load lower limit and on, do not do channel adjustment less than the CCCH channel load in current C CCH channel load value.
In the above step, the current C CCH channel load value of step 201 sends to BSC by BTS, the main body of step S201, S202, S203 can also be BTS, and when the main body of step S201, S202, S203 was BTS, the result that BTS will judge after step 202,203 sent to BSC.
Except obtaining the cell channel demand according to sub-district CCCH channel load, can also utilize situation to obtain the cell channel demand according to sub-district CCCH channel load and local resource simultaneously, specifically describe referring to following two embodiment.
Referring to Fig. 3, be depicted as the flow chart of embodiment of the present invention 3, concrete steps comprise:
Step S301, BSC obtain the load value and the current area resource utilization of current C CCH channel, and for example present embodiment refers to the cell channel resource utilization;
The CCCH channel load thresholding that step S302, BSC compare current C CCH channel load value and preset, wherein, CCCH channel load thresholding comprises upper and lower bound, judge that whether current C CCH channel load is more than or equal to the CCCH channel load upper limit, if, execution in step S303 then, if not, execution in step S305 then;
The local resource utilance thresholding that step S303, BSC compare the current area resource utilization and preset, wherein local resource utilance thresholding comprises upper and lower bound, judge whether the current area resource utilization is less than or equal to local resource utilance lower limit, if, execution in step S304 then, if not, execution in step S308 then;
Step S304, BSC notice BTS increases expansion BCCH channel;
Step S305, BSC judge whether current C CCH channel load value is less than or equal to CCCH channel load lower limit, if, execution in step S306 then, if not, execution in step S308 then;
Whether step S306, BSC judge current area resource utilization value more than or equal to the local resource utilance upper limit, if, execution in step S307 then, if not, execution in step S308 then;
Step S307, BSC notice BTS reduces expansion BCCH channel;
Step S308, do not do channel adjustment.
In the above-mentioned steps, the load value of the current C CCH channel of step 301 and current area channel resource utilance value send to BSC by BTS, step S301, S302, S303, S305, the main body of S306 can also be BTS, if step S301, S302, S303, S305, the main body of S306 is BTS, then BTS is in step 303,305, the result that will judge after 306 sends to BSC, can there be sequencing between the step that compares in the above-mentioned steps simultaneously, be in the same parameter threshold value and high threshold compares and and threshold ones do not have sequencing between comparing, also without comparison sequencing between cell load and the comparison resource utilization relatively, below lift an example explanation, referring to Fig. 4, be depicted as the flow chart of embodiment of the present invention 4, concrete steps are as follows:
Step S401, BSC obtain the load value and the current area resource utilization value of current C CCH channel;
The local resource utilance thresholding that step S402, BSC compare the current area resource utilization and preset, wherein local resource utilance thresholding comprises upper and lower bound, judge that whether current area resource utilization value is more than or equal to the local resource utilance upper limit, if, execution in step S403 then, if not, execution in step S405 then;
Step S403, BSC judge whether current C CCH channel load value is less than or equal to the CCCH channel load lower limit that presets, if, execution in step S404 then, if not, execution in step S408 then;
Step S404, BSC notice BTS reduces expansion BCCH channel;
Step S405, BSC judge whether the current area resource utilization is less than or equal to local resource utilance lower limit, if, execution in step S406 then, if not, execution in step S408 then;
Whether step S406, BSC judge current C CCH channel load more than or equal to the CCCH channel load upper limit that presets, if, execution in step S407 then, if not, execution in step S408 then;
Step S407, BSC notice BTS increases expansion BCCH channel;
Step S408, do not do channel adjustment.
In the above-mentioned steps, the load value of the current C CCH channel of step 301 and current area channel resource utilance value send to BSC by BTS, the main body of step S401, S402, S403, S405, S406 can also be BTS, if the main body of step S401, S402, S403, S405, S406 is BTS, then the result that BTS will judge after step 403,405,406 sends to BSC.
After adjusting expansion BCCH channel, time-delay by the channel occupation mode prevents call loss, the channel that i.e. use mode is adjusted uses according to the occupation mode after the channel adjustment according to the time-delay of the occupation mode before channel adjustment back, below lifts specific embodiment and further specifies:
Referring to Fig. 5, be depicted as the flow chart of the embodiment of the invention 5, concrete steps are as follows:
Step S501, BTS receive notice and the amended system message that increases expansion BCCH channel;
The system message that step S502, BTS issue is new increases expansion BCCH channel;
Channel time delay a period of time before step S503, the increase expansion BCCH channel changes occupation mode again, promptly in a period of time of time-delay, use in the channel configuration mode before the channel increase, channel configuration mode after the time-delay back increases with channel is used, before and after adjusting, it is constant to keep the parameter value that inserts allowance reserved block number and paging channel multi-frame number.Wherein, the time of time-delay can preestablish.
Participate in Fig. 6, be depicted as the flow chart of the embodiment of the invention 6, concrete steps are as follows:
Step S601, BTS receive notice and the amended system message that reduces expansion BCCH channel;
Step S602, BTS issue updated system messages;
Step S603, the expansion BCCH channel that needs to reduce use a period of time according to the channel configuration mode before the channel minimizing, the occupation mode that promptly during this period of time needs the channel that reduces is for reducing the channel configuration mode before the channel, before and after adjusting, it is constant to keep the parameter value that inserts allowance reserved block number and paging channel multi-frame number.Wherein, the time of time-delay can preestablish;
Step S604, minimizing expansion BCCH channel.
Referring to Fig. 7, be depicted as the structure drawing of device of embodiment of the invention adjustment expansion BCCH channel, specifically comprise: acquiring unit 701, comparing unit 702, channel adjustment unit 703.Acquiring unit 701 can obtain cell channel at any time and take situation, comparing unit 702 is used for the cell channel that the comparison acquiring unit obtained and takies situation and the threshold value that presets, thereby obtain channel demands, channel adjustment unit 703 is according to comparing unit 702 resulting channel demands adjustment expansion BCCH channels.
Wherein, cell channel takies situation and comprises the CCCH channel load, the local resource utilance, the threshold value that presets comprises CCCH channel load high threshold and low threshold, local resource utilance high threshold and low threshold, when the cell channel that is obtained when acquiring unit 701 takies situation and is the CCCH channel load, comparing unit 702 compares CCCH channel load and CCCH channel load thresholding, obtain channel demands, when CCCH channel load during more than or equal to CCCH channel load high threshold, channel demands is for increasing expansion BCCH channel demands, and the channel demands that channel adjustment unit 703 obtains according to comparing unit 702 increases expansion BCCH channel.When the CCCH channel load was less than or equal to CCCH channel load low threshold, channel demands was for reducing expansion BCCH channel demands, and the channel demands that channel adjustment unit 703 obtains according to comparing unit 702 reduces expansion BCCH channel.
When the cell channel that is obtained when acquiring unit 701 takies situation and comprises CCCH channel load and local resource utilance, comparing unit 702 compares CCCH channel load and CCCH channel load thresholding, and local resource utilance and local resource utilance thresholding compared, obtain channel demands, when the CCCH channel load is less than or equal under the described local resource utilance in limited time more than or equal to the CCCH channel load upper limit and local resource utilance, described channel demands is for increasing the demand of CCCH channel; When the CCCH channel load more than or equal to CCCH channel load lower limit and local resource utilance more than or equal to the local resource utilance in limited time, channel demands is for reducing the demand of CCCH channel, and channel adjustment unit 703 is according to the channel demands adjustment expansion BCCH channel of comparing unit gained.
Above-mentioned acquiring unit 701, comparing unit 702, channel adjustment unit 703 also can be arranged in different network elements, as are distributed among BSC or the BTS, can realize the purpose of present embodiment.
Method, the device of the adjustment extending BCCH channel of broadcast control channel that embodiment of the present invention provided, obtain channel demands by comparing sub-district channel occupancy situation with the threshold value that presets, increase or reduce expansion BCCH channel according to channel demands, efficiently solve the irrational problem of expansion BCCH channel configuration, avoided the too much situation of configuration expansion BCCH channel to occur, save the resource that is used for static expansion BCCH channel, improved utilization rate of channel resources.
The method of the adjustment extending BCCH channel of broadcast control channel that embodiment of the present invention provided, when increasing expansion BCCH channel, increase expansion BCCH channel and change occupation mode again after channel time delay a period of time before, when reducing expansion BCCH channel, the channel that needs to reduce uses a period of time to reduce afterwards according to the channel configuration mode before reducing again, in whole adjustment process, it is constant to keep the parameter value of permitting reserved block number and paging channel multi-frame number, therefore after adjusting expansion BCCH channel, if the user does not receive amended system message timely, or the paging subchannel is not monitored in change timely, also can receive paging from the channel of original monitoring, thereby solve the problem of call loss oneself.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. method of adjusting extending BCCH channel of broadcast control channel is characterized in that:
Obtain current area Common Control Channel CCCH channel occupancy situation;
More described current area CCCH channel occupancy situation and the threshold value that presets are to determine the CCCH channel demands;
Base station controller is according to described channel demands adjustment expansion BCCH channel;
Wherein, the main body of the described threshold value of obtaining current area CCCH channel occupancy situation, comparison current area CCCH channel occupancy situation and presetting is base station or base station controller;
Described current area CCCH channel occupancy situation comprises the CCCH channel load, and the described threshold value that presets comprises CCCH channel load upper and lower bound; Perhaps, described current area CCCH channel occupancy situation comprises CCCH channel load and local resource utilance, and the described threshold value that presets comprises the CCCH channel load upper limit, lower limit and the local resource utilance upper limit, lower limit.
2. the method for claim 1 is characterized in that, described current area CCCH channel occupancy situation is the CCCH channel load, and the described threshold value that presets comprises CCCH channel load upper and lower bound;
Described relatively current area CCCH channel occupancy situation specifically comprises with definite CCCH channel demands with the threshold value that presets: the CCCH channel load compared with CCCH channel load upper and lower bound respectively,
When described CCCH channel load more than or equal to described CCCH channel load in limited time, described channel demands is for increasing the demand of CCCH channel;
Prescribe a time limit when described CCCH channel load is less than or equal under the described CCCH channel load, described channel demands is for reducing the demand of CCCH channel.
3. the method for claim 1, it is characterized in that, described current area CCCH channel occupancy situation comprises CCCH channel load and local resource utilance, and the described threshold value that presets comprises the CCCH channel load upper limit, lower limit and the local resource utilance upper limit, lower limit;
Described relatively current area CCCH channel occupancy situation specifically comprises with definite CCCH channel demands with the threshold value that presets: the CCCH channel load is compared with CCCH channel load upper and lower bound respectively, and, the local resource utilance is compared with the local resource utilance upper limit, the lower limit that preset respectively;
When described CCCH channel load is less than or equal under the described local resource utilance in limited time more than or equal to the described CCCH channel load upper limit and described local resource utilance, described channel demands is for increasing the demand of CCCH channel;
When described CCCH channel load be less than or equal to described CCCH channel load lower limit and described local resource utilance more than or equal to described local resource utilance in limited time, described channel demands is for reducing the demand of CCCH channel.
4. as the arbitrary described method of claim 1-3, it is characterized in that,
Describedly obtain current area CCCH channel occupancy situation and when relatively the main body of current area CCCH channel occupancy situation and the threshold value that presets is the base station, comprise also that after described comparison step the base station sends to base station controller with described channel demands;
Describedly obtain current area CCCH channel occupancy situation and when relatively the main body of current area CCCH channel occupancy situation and the threshold value that presets is base station controller, also comprise that the base station sends to base station controller with current area channel occupancy situation described before obtaining current area channel occupancy situation step.
5. the method for claim 1 is characterized in that, also comprises:
The base station receives notice and the amended system message of adjusting expansion BCCH channel;
Issue described system message;
The channel that occupation mode is adjusted prolongs the service time of the occupation mode before the channel adjustment, and use according to the occupation mode after the channel adjustment time-delay back.
6. method as claimed in claim 5 is characterized in that, when described adjustment expansion BCCH channel was expanded the BCCH channel for increasing, the channel of described occupation mode adjustment was the channel that increases newly, also comprises before the described time-delay step, increases expansion BCCH channel.
7. method as claimed in claim 5 is characterized in that, when described adjustment expansion BCCH channel is expanded the BCCH channel for reducing, and the channel of the channel that described occupation mode is adjusted for needing to reduce, described time-delay step also comprises afterwards, reduces expansion BCCH channel.
8. a device of adjusting extending BCCH channel of broadcast control channel is characterized in that, comprises
Acquiring unit is used to obtain sub-district Common Control Channel CCCH channel occupancy situation;
Comparing unit is used for comparison acquiring unit sub-district CCCH channel occupancy situation of being obtained and the threshold value that presets, and determines the CCCH channel demands;
The channel adjustment unit is used for the channel according to the determined channel demands adjustment expansion of comparing unit BCCH;
Wherein, described sub-district CCCH channel occupancy situation comprises the CCCH channel load, and the described threshold value that presets comprises CCCH channel load upper and lower bound; Perhaps, described sub-district CCCH channel occupancy situation comprises CCCH channel load and local resource utilance, and the described threshold value that presets comprises the CCCH channel load upper limit, lower limit and the local resource utilance upper limit, lower limit.
9. device as claimed in claim 8 is characterized in that, described sub-district CCCH channel occupancy situation comprises Common Control Channel CCCH channel load, and the described threshold value that presets comprises CCCH channel load upper and lower bound;
Described comparing unit comparison sub-district CCCH channel occupancy situation specifically comprises with the threshold value that presets: the CCCH channel load is compared with CCCH channel load upper and lower bound respectively, when described CCCH channel load more than or equal to described CCCH channel load in limited time, described channel demands is for increasing the demand of CCCH channel; Prescribe a time limit when described CCCH channel load is less than or equal under the described CCCH channel load, described channel demands is for reducing the demand of CCCH channel.
10. device as claimed in claim 8, it is characterized in that, described sub-district CCCH channel occupancy situation comprises CCCH channel load and local resource utilance, and the described threshold value that presets comprises the CCCH channel load upper limit, lower limit and the local resource utilance upper limit, lower limit;
Described relatively sub-district CCCH channel occupancy situation specifically comprises to obtain channel demands with the threshold value that presets: sub-district CCCH channel load is compared with CCCH channel load upper and lower bound respectively, and, the local resource utilance is compared with the local resource utilance upper limit, the lower limit that preset respectively;
When described CCCH channel load is less than or equal under the described local resource utilance in limited time more than or equal to the described CCCH channel load upper limit and described local resource utilance, described channel demands is for increasing the demand of CCCH channel;
When described CCCH channel load be less than or equal to described CCCH channel load lower limit and described local resource utilance more than or equal to described local resource utilance in limited time, described channel demands is for reducing the demand of CCCH channel.
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| CN101686527B (en) * | 2008-09-22 | 2012-01-11 | 中兴通讯股份有限公司 | Sending and receiving method of broadcast control channel |
| CN101562479B (en) * | 2009-05-19 | 2013-01-02 | 中国联合网络通信集团有限公司 | Background service transmission method and system based on idle channel |
| CN102026284B (en) * | 2009-09-15 | 2014-01-01 | 华为技术有限公司 | Method and device for negation of multicarrier system capability |
| CN102137432A (en) * | 2010-09-08 | 2011-07-27 | 华为技术有限公司 | Method, device and system for terminal to access network |
| CN102802159B (en) * | 2011-05-25 | 2015-09-16 | 中兴通讯股份有限公司 | The method of adjustment that a kind of Common Control Channel configures, system and base station controller |
| US10492220B2 (en) * | 2015-09-30 | 2019-11-26 | Qualcomm Incorporated | Opportunistic extended channel uplink grants for ECC |
| CN107872893B (en) * | 2016-09-23 | 2022-10-21 | 中兴通讯股份有限公司 | Method and device for reducing load of downlink common control channel |
| CN109842948B (en) * | 2017-11-27 | 2022-04-01 | 中国移动通信集团广东有限公司 | Enhanced control channel resource allocation method and device for 3D-MIMO base station |
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