CA2785603A1 - Method and apparatus for controlling forward power overload - Google Patents
Method and apparatus for controlling forward power overload Download PDFInfo
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- CA2785603A1 CA2785603A1 CA2785603A CA2785603A CA2785603A1 CA 2785603 A1 CA2785603 A1 CA 2785603A1 CA 2785603 A CA2785603 A CA 2785603A CA 2785603 A CA2785603 A CA 2785603A CA 2785603 A1 CA2785603 A1 CA 2785603A1
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- cell
- overload
- transmission power
- threshold
- level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
Abstract
A method and device for forward power overload control are disclosed by the present invention. In the method, transmission power of each cell corresponding to the same timestamp is obtained; the overload level of the transmission power of each cell in each period is determined according to the transmission power of each cell; for each cell, access requests of terminals in the cell are restricted after performing overload control operations for a predetermined number of periods according to the overload level. According to the technical solution provided by the present invention, stability of system performance can be ensured in the condition of improving cell capacity as much as possible.
Description
Method and Apparatus for Controlling Forward Power Overload Field of the Invention The present invention relates to the communication field, and in particular to a method and apparatus for controlling forward power overload.
Background of the Invention In the mobile communication system, the base station communicates with a plurality of terminals via forward channels. The forward channels need to have sufficient transmission power to ensure normal communication quality. The transmission power of the forward channels of the terminals with better wireless environment is relatively low, and the transmission power of the forward channels of the terminals with poor wireless environment is relatively high. When the wireless situation of a user changes, the transmission power of the forward channels thereof will also change. At the same time, with the increase of the number of terminals initiating services in a cell, the total forward transmission power of the base station will also increase. The radio frequency system of the base station has rated power. The radio frequency system under serious overload state will affect the quality of the already established services. Also, it may cause all the services in the whole cell to be completely interrupted when the power amplifier device protectively turns off due to long-time overload.
In the code division multiple access (abbreviated as CDMA) system, when forward transmission power overload occurs in one cell of a base station, the currently available effective overload control method can be divided into two categories:
limiting the number of the forward channels in the cell, including:
limiting terminal access, limiting terminal soft handover, and removing the already established high speed forward supplemental channels in the cell;
and limiting the transmission power of the currently available forward channels in the cell, including: reducing the transmission power upper limit of the forward channels in the cell, and prohibiting the terminals in the cell to increase the transmission power of the forward channels.
When the cell reaches the designated overload level, certain overload control method or a combination thereof will be used. The overload level is judged by whether the current transmission power of the cell reaches the overload threshold, and the overload threshold of each level is in different ratio to the rated transmission power.
In relevant art, the overload control methods used corresponding to each overload level in an ascending order are: removing the high speed forward supplemental channels and prohibiting terminal access, prohibiting terminal soft handover, and prohibiting the terminal to increase the transmission power of the forward channels. The advantage of this mode is that terminal access is prohibited in an early stage, so that it retains more power margin that can be used for the possible power increase request of the currently available terminals. It ensures the service quality of the currently available terminals, and avoids the situation that the terminals have to drop calls because that the power increase request cannot be met.
However, terminal access being prohibited in an early stage will also cause the system capacity of the cell to reduce. Therefore, in other words, the system performance is ensured by sacrificing system capacity.
In addition, in relevant art, it needs to collect and aggregate the power of all the channel boards at the same moment so as to calculate the power of
Background of the Invention In the mobile communication system, the base station communicates with a plurality of terminals via forward channels. The forward channels need to have sufficient transmission power to ensure normal communication quality. The transmission power of the forward channels of the terminals with better wireless environment is relatively low, and the transmission power of the forward channels of the terminals with poor wireless environment is relatively high. When the wireless situation of a user changes, the transmission power of the forward channels thereof will also change. At the same time, with the increase of the number of terminals initiating services in a cell, the total forward transmission power of the base station will also increase. The radio frequency system of the base station has rated power. The radio frequency system under serious overload state will affect the quality of the already established services. Also, it may cause all the services in the whole cell to be completely interrupted when the power amplifier device protectively turns off due to long-time overload.
In the code division multiple access (abbreviated as CDMA) system, when forward transmission power overload occurs in one cell of a base station, the currently available effective overload control method can be divided into two categories:
limiting the number of the forward channels in the cell, including:
limiting terminal access, limiting terminal soft handover, and removing the already established high speed forward supplemental channels in the cell;
and limiting the transmission power of the currently available forward channels in the cell, including: reducing the transmission power upper limit of the forward channels in the cell, and prohibiting the terminals in the cell to increase the transmission power of the forward channels.
When the cell reaches the designated overload level, certain overload control method or a combination thereof will be used. The overload level is judged by whether the current transmission power of the cell reaches the overload threshold, and the overload threshold of each level is in different ratio to the rated transmission power.
In relevant art, the overload control methods used corresponding to each overload level in an ascending order are: removing the high speed forward supplemental channels and prohibiting terminal access, prohibiting terminal soft handover, and prohibiting the terminal to increase the transmission power of the forward channels. The advantage of this mode is that terminal access is prohibited in an early stage, so that it retains more power margin that can be used for the possible power increase request of the currently available terminals. It ensures the service quality of the currently available terminals, and avoids the situation that the terminals have to drop calls because that the power increase request cannot be met.
However, terminal access being prohibited in an early stage will also cause the system capacity of the cell to reduce. Therefore, in other words, the system performance is ensured by sacrificing system capacity.
In addition, in relevant art, it needs to collect and aggregate the power of all the channel boards at the same moment so as to calculate the power of
2 each cell. It needs the timestamps of all the channel boards to be aligned strictly, and they have to be reported normally. When abnormity appears in one channel board, the power of all the cells in the whole base station cannot be calculated, so that the degree of perfection of the system is rather low.
Based on the above problems existed in relevant art, it is very necessary to provide good-quality services for users as much as possible, employ appropriate and flexible forward overload control strategy, and increase the degree of perfection of the system under the premise of keeping the system running stably.
Summary of the Invention As to the problems in relevant art that the system capacity reduces due to employing conventional overload control solution and the like, the present invention provides a method and apparatus for controlling forward power overload so as to solve at least one of the above problems.
A method for controlling forward power overload is provided according to one aspect of the present invention.
The method for controlling forward power overload according to the present invention comprises: acquiring a transmission power of each cell corresponding to a same timestamp; determining an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell; and for the each cell, after having performed an overload control operation for a predetermined number of periods, limiting access requests of terminals in the each cell according to the overload level.
An apparatus for controlling forward power overload is provided
Based on the above problems existed in relevant art, it is very necessary to provide good-quality services for users as much as possible, employ appropriate and flexible forward overload control strategy, and increase the degree of perfection of the system under the premise of keeping the system running stably.
Summary of the Invention As to the problems in relevant art that the system capacity reduces due to employing conventional overload control solution and the like, the present invention provides a method and apparatus for controlling forward power overload so as to solve at least one of the above problems.
A method for controlling forward power overload is provided according to one aspect of the present invention.
The method for controlling forward power overload according to the present invention comprises: acquiring a transmission power of each cell corresponding to a same timestamp; determining an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell; and for the each cell, after having performed an overload control operation for a predetermined number of periods, limiting access requests of terminals in the each cell according to the overload level.
An apparatus for controlling forward power overload is provided
3 according to another aspect of the present invention.
The apparatus for controlling forward power overload according to the present invention comprises: an acquisition unit, configured to acquire a transmission power of each cell corresponding to a same timestamp; a determination unit, configured to determine an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell; and a processing unit, configured to, for the each cell, after having performed an overload control operation for a predetermined number of periods, limit access requests of terminals in the cell according to the overload level, wherein the overload control operation does not comprise the operation of limiting access requests of terminals in the cell.
By virtue of the present invention, the problems in relevant art that the system capacity reduces due to employing conventional overload control solution is solved by comprehensively considering the effects of system capacity and cell margin users to the power of the whole cell. Thus, the stability of system performance can be ensured while cell capacity is improved as much as possible.
Brief Description of the Drawings The drawings illustrated here provide a further understanding of the present invention and form a part of the present application. The exemplary embodiments and the description thereof are used to explain the present invention without unduly limiting the scope of the present invention.
In the drawings:
Fig. 1 is a schematic diagram of the structure of a system for controlling forward power overload in a CDMA system according to an example of the present invention;
Fig. 2 is a flow chart of a method for controlling forward power
The apparatus for controlling forward power overload according to the present invention comprises: an acquisition unit, configured to acquire a transmission power of each cell corresponding to a same timestamp; a determination unit, configured to determine an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell; and a processing unit, configured to, for the each cell, after having performed an overload control operation for a predetermined number of periods, limit access requests of terminals in the cell according to the overload level, wherein the overload control operation does not comprise the operation of limiting access requests of terminals in the cell.
By virtue of the present invention, the problems in relevant art that the system capacity reduces due to employing conventional overload control solution is solved by comprehensively considering the effects of system capacity and cell margin users to the power of the whole cell. Thus, the stability of system performance can be ensured while cell capacity is improved as much as possible.
Brief Description of the Drawings The drawings illustrated here provide a further understanding of the present invention and form a part of the present application. The exemplary embodiments and the description thereof are used to explain the present invention without unduly limiting the scope of the present invention.
In the drawings:
Fig. 1 is a schematic diagram of the structure of a system for controlling forward power overload in a CDMA system according to an example of the present invention;
Fig. 2 is a flow chart of a method for controlling forward power
4 overload according to the embodiments of the present invention;
Fig. 3 is a flow chart of a method for controlling forward power overload according to the preferred embodiments of the present invention;
Fig. 4 is a flow chart of an apparatus for controlling forward power overload according to the embodiments of the present invention; and Fig. 5 is a flow chart of an apparatus for controlling forward power overload according to the preferred embodiments of the present invention.
Detailed Description of the Embodiments The embodiments of the present invention will be described hereinafter in detail in conjunction with the drawings thereof. It needs to be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.
In relevant art, when forward transmission power overload occurs in a cell of a base station and the forward power overload control is performed, terminal access being prohibited in an early stage retains more power margin for the possible power increase request of the currently available terminals. But, it will cause the system capacity of the cell to reduce.
That is to say, the performance of the system is ensured by sacrificing system capacity. As to the above problems, the embodiments provided by the present invention comprehensively consider the effects of system capacity and cell margin users to the power of the whole cell. As to each cell, the access requests of terminals in the cell are limited after having performed overload control operation for the time of a predetermined number of periods according to the overload level. The above overload control operation does not comprise the operation of limiting the access requests of the terminals in the cell, such as the operation of reducing upper limit of the forward channel transmission power of the terminals in the cell.
First, the architecture of a system for controlling forward overload in a CDMA system is described in conjunction with Fig. 1. As shown in Fig. 1, the architecture of the system for controlling forward overload in the CDMA
system comprises: a base station main control module 10 and a channel board 12, wherein the base station main control module 10 is the only control center of the base station and mainly completes service establishment and executes a management strategy including the forward overload control strategy. The channel board is the physical carrier of a channel and mainly completes channel coding and decoding, and reports the transmission power of all the forward channels carried by this board.
During a specific implementation, one base station can have a plurality of channel boards.
A method for controlling forward power overload is provided according to the embodiments of the present invention.
Fig. 2 is a flow chart of a method for controlling forward power overload according to the embodiments of the present invention. As shown in Fig. 2, the method for controlling forward power overload according to the embodiments of the present invention comprises the following process (steps S201 to S205):
Step S201: the transmission power of each cell corresponding to the same timestamp is acquired;
Step S203: the overload level of the transmission power of each cell in each period is determined according to the transmission power of each cell;
and Step S205: as to each cell, access requests of terminals in the cell is limited after having performed overload control operation for the time of a predetermined number of periods according to the overload level, wherein the overload control operation does not comprise the operation of limiting the access requests of the terminals in the cell.
The above method for controlling forward power overload solves the problem in relevant art that terminal access being prohibited in an early stage will cause the system capacity of the cell to reduce for employing conventional overload control solution. Thus the stability of system performance can be ensured while cell capacity is improved as much as possible.
During specific implementation, the base station main control module described in Fig. 1 can be used for performing the above steps.
However, the main body performing the above steps comprises but not limit to the base station main control module 10 if there is no conflict.
Preferably, step S201 can further comprise the following process:
(1) a power report message is received from a channel board, wherein the power report message carries the transmission power of forward channels carried by the channel board and the timestamp of the report;
(2) the timestamp of the report is compared with the stored latest timestamp to judge whether there is a change;
(3) if no, then the transmission power is stored; and (4) if yes, then the transmission power of each cell corresponding to the latest timestamp is acquired by calculation, the latest timestamp is updated, and the transmission power is stored.
By virtue of the above solution, the logic judgment point of update is changed at the time of channel board report. It does not require the power report of all the timestamps designated by the channel board to reach the base station. It avoids the calculation error caused when part of the report message is lost or the channel board is abnormal, thus improving system perfection.
Preferably, step S203 can further comprises the following process:
(1) overload percentage threshold of each level of a cell and the rated forward transmission power of the cell are acquired from predetermined configuration parameters;
(2) overload percentage threshold of each level of the cell is multiplied with the rated forward transmission power of the cell to obtain power threshold of each level of the cell; and (3) the transmission power of each cell is compared with the power threshold of each level respectively to obtain the overload level of the transmission power of each cell.
During specific implementation, power threshold of each level of the cell can be adjusted by adjusting overload percentage threshold of each level.
Thus, when the overload level of a cell is changed during a period along with the above adjustment, the specific adjustment range can be determined according to practical situation.
Preferably, the above step S205 can further comprises the following process.
(1) When the overload level of a cell during a current period is not greater than a first threshold and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, upper limit of the forward channel transmission power of terminals in the cell is reduced, wherein the first threshold is not less than the second threshold Preferably, when the overload level of a cell during a current period is not greater than the first threshold and the overload level of the cell during a predetermined number of periods before the current period is not successively greater than or equal to the second threshold, it can further employ the following process: removing a predetermined number of forward supplemental channels.
During specific implementation, in the situation that there are forward supplemental channels, a predetermined number of forward supplemental channels can be removed first for effectively performing forward overload control.
In this case, the so-called the overload level of the cell during a predetermined number of periods being not successively greater than or equal to the second threshold means that during a predetermined number of successive periods, as long as the overload level of the cell does not reach the second threshold in one period, it can be viewed as that the overload level of the cell is not successively greater than or equal to the second threshold during a predetermined number of periods.
(2) When the overload level of a cell is not less than the first threshold in a current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, the access requests of terminals in the cell is limited.
Preferably, when the overload level of a cell is not less than a third threshold in a current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, wherein the third threshold is greater than the first threshold, it can further employ the following process:
reducing the forward channel transmission power of terminals in the cell rapidly, removing a predetermined number of forward supplemental channels, and limiting the soft handoff add of the terminal.
In this case, the third threshold (such as 5 level) is set to judge whether the overload level of a cell during a current period is excessively high, and as to the excessively high overload level, it should be stricter to limit power increase and reduce terminal power.
It can be known from the above solution that higher overload level employs stricter control actions to limit power increase and reduce terminal power. It not only eliminates access failure caused by the peak burr of power sampling and also relieves the power overload of the cell by indirectly releasing the service of far-point terminals.
It should be noted that there is no sequential order between the above step (1) and step (2), and one of two the strategies described therein can be used according to different situations.
Fig. 3 is a flow chart of a method for controlling forward power overload according to the preferred embodiments of the present invention.
In this case, this method is applied in the CDMA system and it will be described in conjunction with Fig. 3. As shown in Fig. 3, the method for controlling forward power overload according to the preferred embodiments of the present invention comprises the following process (steps S301 to S309).
Step S301: a channel board reports the transmission power of all the forward channels of all the cells carried by this board to a base station main control module according to the overload report period. The report carries the timestamp of the report. When the clock synchronization of the system is normal, the timestamps reported by all the channel boards during the same period are the same.
Step S303: after having received the power report reported by the channel board, the base station main control module compares it with the stored latest timestamp. If the timestamps are the same, then the report is cached; and if the timestamps are different, then the cached data is calculated (not including the report), the sum of the forward transmission power of all the cells is obtained, the timestamp is updated, and finally the report is cached.
Step S305: the base station main control module multiplies the system configured overload threshold (percentage) of each level with the rated transmission power of the cell to obtain transmission power threshold of each level.
Step S307: the transmission power of the cell calculated by Step S303 is compared with power threshold of each level obtained by Step S305 to obtain the overload level of each cell.
Step S309: the overload control actions of the corresponding level and the levels below are performed according to the overload level of each cell.
Specifically, it can refer to Table 1.
Table 1 overload level overload control action overload alleviating mechanism restore the channel transmission cancel all the previous non-overload power upper limit of terminals in a overload control actions cell reduce the channel transmission far-point terminals cannot power upper limit of a terminal in a increase channel level 1 overload cell and remove M forward transmission power and supplemental channels their calls may be dropped; and no effect to near-point users it does not same to 1 level overload control far-point terminals drop successively reach action calls; no effect to near level 2 or higher level point terminals, and the overload in N periods effective radius of the cell is reduced if overload level above level 2 is terminals of the service successively reached in N periods, state in the cell no long and the last period is level 2 increase forward level 2 overload overload, then access is limited, transmission power and channel transmission power new terminals will no increase of terminals in the cell is longer access prohibited, and M forward supplemental channels are removed.
if overload level above level 2 is terminals of the service successively reached in N periods, state in the cell reduce and the last period is level 3 channel transmission overload, then access and soft power, and soft handoff level 3 overload handoff add are limited, the channel add is prohibited in the transmission power of all terminals cell in the cell is reduced, and M
forward supplemental channels are removed.
if overload level above level 2 is terminals of the service successively reached in N periods, state in the cell reduces and the last period is level 4 channel transmission overload, then access and soft power rapidly, and soft level 4 overload handoff add are limited, the channel handoff add is prohibited transmission power of all terminals in the cell in the cell is reduced rapidly, and M
forward supplemental channels are removed.
It can be known from Table 1 that the forward power overload can be controlled using the following strategies: reducing the basic channel transmission power upper limit of the terminal under relatively low overload level, limiting access and soft handover under relatively high overload level, and limiting the basic channel transmission power upper limit during at least N overload control periods before limiting access, and employing stricter control actions to limit power increase and reduce terminal power under higher overload level.
That is, when the overload level of a cell is not greater than level 3 and the overload level of the cell is not successively greater than or equal to level 3 during N periods before the same timestamp, reduce upper limit of the forward channel transmission power of terminals in the cell; and when overload level of a cell is not less than level 3 and the overload level of the cell is successively greater than or equal to 3 level during N periods before the same timestamp, limit the access requests of terminals in the cell.
During specific implementation, the system will limit terminal access only after having performed the overload control action of reducing the forward channel transmission power of terminals in the cell in at least N
periods. Accordingly, it solves the problem that the system capacity of a cell reduces due to the terminal access being prohibited in an early stage in relevant art. It can retain the access chance of the near-point users by sacrificing far-point terminals, and thus alleviate cell overload. The service priority level of the near-point users is increased and the system capacity is improved.
An apparatus for controlling forward power overload is further provided according to the embodiments of the present invention.
Fig. 4 is a flow chart of an apparatus for controlling forward power overload according to the embodiments of the present invention. As shown in Fig. 4, the apparatus for controlling forward power overload according to the embodiments of the present invention comprises: an acquisition unit 40, a determination unit 42, and a processing unit 44.
The acquisition unit 40 is configured to acquire the transmission power of each cell corresponding to the same timestamp.
The determination unit 42, connected to the acquisition unit 40, is configured to determine the overload level of the transmission power of each cell in each period according to the transmission power of each cell.
The processing unit 44, connected to the determination unit 42, is configured to, for each cell, after having performed overload control operation for a predetermined number of periods, limit access requests of terminals in the cell according to the overload level, wherein the overload control operation does not comprise the operation of limiting access requests of terminals in the cell.
This apparatus is used for controlling forward power overload. It solves the problem in relevant art that terminal access being prohibited in an early stage will cause the system capacity of the cell to reduce when employing conventional overload control solution. Thus the stability of system performance can be ensured while the cell capacity is improved as much as possible.
Preferably, as shown in Fig. 5, the processing unit 44 can further comprises:
a first processing module 440, configured to, when the overload level of a cell is not greater than a first threshold in a current period and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, reduce upper limit of the forward channel transmission power of terminals in the cell, wherein the first threshold is not less than the second threshold;
and the second processing module 442, configured to, when the overload level of a cell is not less than the first threshold in a current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, limit the access requests of terminals in the cell.
Preferably, as shown in Fig. 5, the above acquisition unit 40 can further comprises: a receiving module 400, configured to receive a power report message from a channel board, wherein the power report message carries the transmission power of a forward channel carried by the channel board and the timestamp of the report; a judging module 402, configured to compare the timestamp of the report with the stored latest timestamp to judge whether there is a change; and a processing module 404, configured to store the transmission power in the situation that the output of the judging module is no, and to acquire the transmission power of each cell corresponding to the latest timestamp by calculation, obtain the power distribution of the cell corresponding to a previous timestamp, update the latest timestamp, and store the transmission power in the situation that the output of the judging module is yes..
Preferably, as shown in Fig. 5, the determination unit 42 comprises: an acquisition module 420, configured to acquire overload percentage threshold of each level of a cell and the rated forward transmission power of the cell from predetermined configuration parameters; a calculation module 422, configured to multiple overload percentage threshold of each level of the cell and the rated forward transmission power of the cell to obtain power threshold of each level of the cell; and a comparison module 424, configured to compare the transmission power of each cell with power threshold of each level to obtain the overload level of the transmission power of each cell.
Preferably, the above first processing module 440 is further configured to remove a predetermined number of forward supplemental channels.
Preferably, the above second processing module 442 is further configured to reduce the forward channel transmission power of terminals in the cell rapidly, remove a predetermined number of forward supplemental channels, and limit the soft handoff add of the terminal, when the overload level of the cell in a current period is not less than a third threshold and the overload level of the cell in a predetermined number of periods before the current period is successively greater than or equal to the first threshold, wherein the third threshold is greater than the first threshold.
When the above apparatus is performing forward overload control, in the situation that the cell capacity is improved as much as possible, the stability of system performance can be ensured, the access failure caused by the peak burr of power sampling can be eliminated, and the power overload of the cell can be alleviated by indirectly releasing the service of the far-point terminals.
In summary, the above embodiments provided by the present invention reduces the basic channel transmission power upper limit of terminals under relatively low overload level, limits access and soft handover under relatively high level, limit the basic channel transmission power upper limit in at least a predetermined number (such as N) of successive overload control periods before limiting access, and employ stricter control actions to limit power increase and reduce terminal power under high overload level. The access failure caused by the peak burr of power sampling can be eliminated and the power overload of the cell can be alleviated by indirectly releasing the service of the far-point terminals. As compared to the forward power overload control solution in relevant art, the service priority level of the near-point users is increased, and the system capacity is improved. In addition, in the embodiments of the present invention, the logic judgment point of update is changed at the time of the channel board report. It does not require the power report of all the timestamps designated by the channel board to reach the base station.
Thus, it avoids the calculation error caused when part of the report message is lost or the channel board is abnormal, thus improving system perfection.
Apparently, those skilled in the art shall understand that the above modules and steps of the present invention can be realized by using general purpose calculating device, can be integrated in one calculating device, or distributed on a network which consists of a plurality of calculating devices.
Alternatively they can be realized by using the executable program code of the calculating device. Thus, they can be stored in the storing device and executed by the calculating device. In some cases, the steps shown or described herein can be executed in a sequence other than the sequence shown herein. Or, they are made into integrated circuit module respectively, or a plurality of modules or steps thereof are made into one integrated circuit module. In this way, the present invention is not restricted to any particular hardware and software combination.
Above description is only to illustrate the preferred embodiments but not to limit the present invention. Various alterations and changes to the present invention are apparent to those skilled in the art. The scope defined in claims shall comprise any modification, equivalent substitution and improvement within the spirit and principle of the present invention.
Fig. 3 is a flow chart of a method for controlling forward power overload according to the preferred embodiments of the present invention;
Fig. 4 is a flow chart of an apparatus for controlling forward power overload according to the embodiments of the present invention; and Fig. 5 is a flow chart of an apparatus for controlling forward power overload according to the preferred embodiments of the present invention.
Detailed Description of the Embodiments The embodiments of the present invention will be described hereinafter in detail in conjunction with the drawings thereof. It needs to be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.
In relevant art, when forward transmission power overload occurs in a cell of a base station and the forward power overload control is performed, terminal access being prohibited in an early stage retains more power margin for the possible power increase request of the currently available terminals. But, it will cause the system capacity of the cell to reduce.
That is to say, the performance of the system is ensured by sacrificing system capacity. As to the above problems, the embodiments provided by the present invention comprehensively consider the effects of system capacity and cell margin users to the power of the whole cell. As to each cell, the access requests of terminals in the cell are limited after having performed overload control operation for the time of a predetermined number of periods according to the overload level. The above overload control operation does not comprise the operation of limiting the access requests of the terminals in the cell, such as the operation of reducing upper limit of the forward channel transmission power of the terminals in the cell.
First, the architecture of a system for controlling forward overload in a CDMA system is described in conjunction with Fig. 1. As shown in Fig. 1, the architecture of the system for controlling forward overload in the CDMA
system comprises: a base station main control module 10 and a channel board 12, wherein the base station main control module 10 is the only control center of the base station and mainly completes service establishment and executes a management strategy including the forward overload control strategy. The channel board is the physical carrier of a channel and mainly completes channel coding and decoding, and reports the transmission power of all the forward channels carried by this board.
During a specific implementation, one base station can have a plurality of channel boards.
A method for controlling forward power overload is provided according to the embodiments of the present invention.
Fig. 2 is a flow chart of a method for controlling forward power overload according to the embodiments of the present invention. As shown in Fig. 2, the method for controlling forward power overload according to the embodiments of the present invention comprises the following process (steps S201 to S205):
Step S201: the transmission power of each cell corresponding to the same timestamp is acquired;
Step S203: the overload level of the transmission power of each cell in each period is determined according to the transmission power of each cell;
and Step S205: as to each cell, access requests of terminals in the cell is limited after having performed overload control operation for the time of a predetermined number of periods according to the overload level, wherein the overload control operation does not comprise the operation of limiting the access requests of the terminals in the cell.
The above method for controlling forward power overload solves the problem in relevant art that terminal access being prohibited in an early stage will cause the system capacity of the cell to reduce for employing conventional overload control solution. Thus the stability of system performance can be ensured while cell capacity is improved as much as possible.
During specific implementation, the base station main control module described in Fig. 1 can be used for performing the above steps.
However, the main body performing the above steps comprises but not limit to the base station main control module 10 if there is no conflict.
Preferably, step S201 can further comprise the following process:
(1) a power report message is received from a channel board, wherein the power report message carries the transmission power of forward channels carried by the channel board and the timestamp of the report;
(2) the timestamp of the report is compared with the stored latest timestamp to judge whether there is a change;
(3) if no, then the transmission power is stored; and (4) if yes, then the transmission power of each cell corresponding to the latest timestamp is acquired by calculation, the latest timestamp is updated, and the transmission power is stored.
By virtue of the above solution, the logic judgment point of update is changed at the time of channel board report. It does not require the power report of all the timestamps designated by the channel board to reach the base station. It avoids the calculation error caused when part of the report message is lost or the channel board is abnormal, thus improving system perfection.
Preferably, step S203 can further comprises the following process:
(1) overload percentage threshold of each level of a cell and the rated forward transmission power of the cell are acquired from predetermined configuration parameters;
(2) overload percentage threshold of each level of the cell is multiplied with the rated forward transmission power of the cell to obtain power threshold of each level of the cell; and (3) the transmission power of each cell is compared with the power threshold of each level respectively to obtain the overload level of the transmission power of each cell.
During specific implementation, power threshold of each level of the cell can be adjusted by adjusting overload percentage threshold of each level.
Thus, when the overload level of a cell is changed during a period along with the above adjustment, the specific adjustment range can be determined according to practical situation.
Preferably, the above step S205 can further comprises the following process.
(1) When the overload level of a cell during a current period is not greater than a first threshold and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, upper limit of the forward channel transmission power of terminals in the cell is reduced, wherein the first threshold is not less than the second threshold Preferably, when the overload level of a cell during a current period is not greater than the first threshold and the overload level of the cell during a predetermined number of periods before the current period is not successively greater than or equal to the second threshold, it can further employ the following process: removing a predetermined number of forward supplemental channels.
During specific implementation, in the situation that there are forward supplemental channels, a predetermined number of forward supplemental channels can be removed first for effectively performing forward overload control.
In this case, the so-called the overload level of the cell during a predetermined number of periods being not successively greater than or equal to the second threshold means that during a predetermined number of successive periods, as long as the overload level of the cell does not reach the second threshold in one period, it can be viewed as that the overload level of the cell is not successively greater than or equal to the second threshold during a predetermined number of periods.
(2) When the overload level of a cell is not less than the first threshold in a current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, the access requests of terminals in the cell is limited.
Preferably, when the overload level of a cell is not less than a third threshold in a current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, wherein the third threshold is greater than the first threshold, it can further employ the following process:
reducing the forward channel transmission power of terminals in the cell rapidly, removing a predetermined number of forward supplemental channels, and limiting the soft handoff add of the terminal.
In this case, the third threshold (such as 5 level) is set to judge whether the overload level of a cell during a current period is excessively high, and as to the excessively high overload level, it should be stricter to limit power increase and reduce terminal power.
It can be known from the above solution that higher overload level employs stricter control actions to limit power increase and reduce terminal power. It not only eliminates access failure caused by the peak burr of power sampling and also relieves the power overload of the cell by indirectly releasing the service of far-point terminals.
It should be noted that there is no sequential order between the above step (1) and step (2), and one of two the strategies described therein can be used according to different situations.
Fig. 3 is a flow chart of a method for controlling forward power overload according to the preferred embodiments of the present invention.
In this case, this method is applied in the CDMA system and it will be described in conjunction with Fig. 3. As shown in Fig. 3, the method for controlling forward power overload according to the preferred embodiments of the present invention comprises the following process (steps S301 to S309).
Step S301: a channel board reports the transmission power of all the forward channels of all the cells carried by this board to a base station main control module according to the overload report period. The report carries the timestamp of the report. When the clock synchronization of the system is normal, the timestamps reported by all the channel boards during the same period are the same.
Step S303: after having received the power report reported by the channel board, the base station main control module compares it with the stored latest timestamp. If the timestamps are the same, then the report is cached; and if the timestamps are different, then the cached data is calculated (not including the report), the sum of the forward transmission power of all the cells is obtained, the timestamp is updated, and finally the report is cached.
Step S305: the base station main control module multiplies the system configured overload threshold (percentage) of each level with the rated transmission power of the cell to obtain transmission power threshold of each level.
Step S307: the transmission power of the cell calculated by Step S303 is compared with power threshold of each level obtained by Step S305 to obtain the overload level of each cell.
Step S309: the overload control actions of the corresponding level and the levels below are performed according to the overload level of each cell.
Specifically, it can refer to Table 1.
Table 1 overload level overload control action overload alleviating mechanism restore the channel transmission cancel all the previous non-overload power upper limit of terminals in a overload control actions cell reduce the channel transmission far-point terminals cannot power upper limit of a terminal in a increase channel level 1 overload cell and remove M forward transmission power and supplemental channels their calls may be dropped; and no effect to near-point users it does not same to 1 level overload control far-point terminals drop successively reach action calls; no effect to near level 2 or higher level point terminals, and the overload in N periods effective radius of the cell is reduced if overload level above level 2 is terminals of the service successively reached in N periods, state in the cell no long and the last period is level 2 increase forward level 2 overload overload, then access is limited, transmission power and channel transmission power new terminals will no increase of terminals in the cell is longer access prohibited, and M forward supplemental channels are removed.
if overload level above level 2 is terminals of the service successively reached in N periods, state in the cell reduce and the last period is level 3 channel transmission overload, then access and soft power, and soft handoff level 3 overload handoff add are limited, the channel add is prohibited in the transmission power of all terminals cell in the cell is reduced, and M
forward supplemental channels are removed.
if overload level above level 2 is terminals of the service successively reached in N periods, state in the cell reduces and the last period is level 4 channel transmission overload, then access and soft power rapidly, and soft level 4 overload handoff add are limited, the channel handoff add is prohibited transmission power of all terminals in the cell in the cell is reduced rapidly, and M
forward supplemental channels are removed.
It can be known from Table 1 that the forward power overload can be controlled using the following strategies: reducing the basic channel transmission power upper limit of the terminal under relatively low overload level, limiting access and soft handover under relatively high overload level, and limiting the basic channel transmission power upper limit during at least N overload control periods before limiting access, and employing stricter control actions to limit power increase and reduce terminal power under higher overload level.
That is, when the overload level of a cell is not greater than level 3 and the overload level of the cell is not successively greater than or equal to level 3 during N periods before the same timestamp, reduce upper limit of the forward channel transmission power of terminals in the cell; and when overload level of a cell is not less than level 3 and the overload level of the cell is successively greater than or equal to 3 level during N periods before the same timestamp, limit the access requests of terminals in the cell.
During specific implementation, the system will limit terminal access only after having performed the overload control action of reducing the forward channel transmission power of terminals in the cell in at least N
periods. Accordingly, it solves the problem that the system capacity of a cell reduces due to the terminal access being prohibited in an early stage in relevant art. It can retain the access chance of the near-point users by sacrificing far-point terminals, and thus alleviate cell overload. The service priority level of the near-point users is increased and the system capacity is improved.
An apparatus for controlling forward power overload is further provided according to the embodiments of the present invention.
Fig. 4 is a flow chart of an apparatus for controlling forward power overload according to the embodiments of the present invention. As shown in Fig. 4, the apparatus for controlling forward power overload according to the embodiments of the present invention comprises: an acquisition unit 40, a determination unit 42, and a processing unit 44.
The acquisition unit 40 is configured to acquire the transmission power of each cell corresponding to the same timestamp.
The determination unit 42, connected to the acquisition unit 40, is configured to determine the overload level of the transmission power of each cell in each period according to the transmission power of each cell.
The processing unit 44, connected to the determination unit 42, is configured to, for each cell, after having performed overload control operation for a predetermined number of periods, limit access requests of terminals in the cell according to the overload level, wherein the overload control operation does not comprise the operation of limiting access requests of terminals in the cell.
This apparatus is used for controlling forward power overload. It solves the problem in relevant art that terminal access being prohibited in an early stage will cause the system capacity of the cell to reduce when employing conventional overload control solution. Thus the stability of system performance can be ensured while the cell capacity is improved as much as possible.
Preferably, as shown in Fig. 5, the processing unit 44 can further comprises:
a first processing module 440, configured to, when the overload level of a cell is not greater than a first threshold in a current period and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, reduce upper limit of the forward channel transmission power of terminals in the cell, wherein the first threshold is not less than the second threshold;
and the second processing module 442, configured to, when the overload level of a cell is not less than the first threshold in a current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, limit the access requests of terminals in the cell.
Preferably, as shown in Fig. 5, the above acquisition unit 40 can further comprises: a receiving module 400, configured to receive a power report message from a channel board, wherein the power report message carries the transmission power of a forward channel carried by the channel board and the timestamp of the report; a judging module 402, configured to compare the timestamp of the report with the stored latest timestamp to judge whether there is a change; and a processing module 404, configured to store the transmission power in the situation that the output of the judging module is no, and to acquire the transmission power of each cell corresponding to the latest timestamp by calculation, obtain the power distribution of the cell corresponding to a previous timestamp, update the latest timestamp, and store the transmission power in the situation that the output of the judging module is yes..
Preferably, as shown in Fig. 5, the determination unit 42 comprises: an acquisition module 420, configured to acquire overload percentage threshold of each level of a cell and the rated forward transmission power of the cell from predetermined configuration parameters; a calculation module 422, configured to multiple overload percentage threshold of each level of the cell and the rated forward transmission power of the cell to obtain power threshold of each level of the cell; and a comparison module 424, configured to compare the transmission power of each cell with power threshold of each level to obtain the overload level of the transmission power of each cell.
Preferably, the above first processing module 440 is further configured to remove a predetermined number of forward supplemental channels.
Preferably, the above second processing module 442 is further configured to reduce the forward channel transmission power of terminals in the cell rapidly, remove a predetermined number of forward supplemental channels, and limit the soft handoff add of the terminal, when the overload level of the cell in a current period is not less than a third threshold and the overload level of the cell in a predetermined number of periods before the current period is successively greater than or equal to the first threshold, wherein the third threshold is greater than the first threshold.
When the above apparatus is performing forward overload control, in the situation that the cell capacity is improved as much as possible, the stability of system performance can be ensured, the access failure caused by the peak burr of power sampling can be eliminated, and the power overload of the cell can be alleviated by indirectly releasing the service of the far-point terminals.
In summary, the above embodiments provided by the present invention reduces the basic channel transmission power upper limit of terminals under relatively low overload level, limits access and soft handover under relatively high level, limit the basic channel transmission power upper limit in at least a predetermined number (such as N) of successive overload control periods before limiting access, and employ stricter control actions to limit power increase and reduce terminal power under high overload level. The access failure caused by the peak burr of power sampling can be eliminated and the power overload of the cell can be alleviated by indirectly releasing the service of the far-point terminals. As compared to the forward power overload control solution in relevant art, the service priority level of the near-point users is increased, and the system capacity is improved. In addition, in the embodiments of the present invention, the logic judgment point of update is changed at the time of the channel board report. It does not require the power report of all the timestamps designated by the channel board to reach the base station.
Thus, it avoids the calculation error caused when part of the report message is lost or the channel board is abnormal, thus improving system perfection.
Apparently, those skilled in the art shall understand that the above modules and steps of the present invention can be realized by using general purpose calculating device, can be integrated in one calculating device, or distributed on a network which consists of a plurality of calculating devices.
Alternatively they can be realized by using the executable program code of the calculating device. Thus, they can be stored in the storing device and executed by the calculating device. In some cases, the steps shown or described herein can be executed in a sequence other than the sequence shown herein. Or, they are made into integrated circuit module respectively, or a plurality of modules or steps thereof are made into one integrated circuit module. In this way, the present invention is not restricted to any particular hardware and software combination.
Above description is only to illustrate the preferred embodiments but not to limit the present invention. Various alterations and changes to the present invention are apparent to those skilled in the art. The scope defined in claims shall comprise any modification, equivalent substitution and improvement within the spirit and principle of the present invention.
Claims (12)
1. A method for controlling forward power overload, characterized in that the method comprises:
acquiring a transmission power of each cell corresponding to a same timestamp;
determining an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell;
and for the each cell, after having performed an overload control operation for a predetermined number of periods, limiting access requests of terminals in the each cell according to the overload level.
acquiring a transmission power of each cell corresponding to a same timestamp;
determining an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell;
and for the each cell, after having performed an overload control operation for a predetermined number of periods, limiting access requests of terminals in the each cell according to the overload level.
2. The method according to claim 1, characterized in that after having performed the overload control operation for a predetermined number of periods, limiting access requests of the terminals in the each cell comprises:
when an overload level of a cell is not greater than a first threshold in a current period and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, reducing upper limit of forward channel transmission power of the terminals in the cell, wherein the first threshold is not less than the second threshold; and when the overload level of the cell is not less than the first threshold in the current period and the overload level of the cell in a predetermined number of periods before the current period is successively greater than or equal to the first threshold, limiting access requests of the terminals in the cell.
when an overload level of a cell is not greater than a first threshold in a current period and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, reducing upper limit of forward channel transmission power of the terminals in the cell, wherein the first threshold is not less than the second threshold; and when the overload level of the cell is not less than the first threshold in the current period and the overload level of the cell in a predetermined number of periods before the current period is successively greater than or equal to the first threshold, limiting access requests of the terminals in the cell.
3. The method according to claim 1, characterized in that acquiring the transmission power of the each cell corresponding to the same timestamp comprises:
receiving a power report message from a channel board, wherein the power report message carries a transmission power of forward channels carried by the channel board and a timestamp of the report; and comparing the timestamp of the report with a stored latest timestamp to judge whether there is a change;
if no, then storing the transmission power; and if yes, then acquiring a transmission power of the each cell corresponding to the latest timestamp by calculation, updating the latest timestamp, and storing the transmission power.
receiving a power report message from a channel board, wherein the power report message carries a transmission power of forward channels carried by the channel board and a timestamp of the report; and comparing the timestamp of the report with a stored latest timestamp to judge whether there is a change;
if no, then storing the transmission power; and if yes, then acquiring a transmission power of the each cell corresponding to the latest timestamp by calculation, updating the latest timestamp, and storing the transmission power.
4. The method according to claim 1, characterized in that determining the overload level of the transmission power of the each cell in each period according to the transmission power of the each cell comprises:
acquiring an overload percentage threshold of each level of a cell and a rated forward transmission power of the cell from predetermined configuration parameters;
multiplying the overload percentage threshold of each level of the cell with the rated forward transmission power of the cell to obtain a power threshold of each level of the cell; and comparing the transmission power of the each cell with the power threshold of each level respectively to obtain the overload level of the transmission power of the each cell.
acquiring an overload percentage threshold of each level of a cell and a rated forward transmission power of the cell from predetermined configuration parameters;
multiplying the overload percentage threshold of each level of the cell with the rated forward transmission power of the cell to obtain a power threshold of each level of the cell; and comparing the transmission power of the each cell with the power threshold of each level respectively to obtain the overload level of the transmission power of the each cell.
5. The method according to any one of claims 1 to 4, characterized in that the method further comprises:
removing a predetermined number of forward supplemental channels.
removing a predetermined number of forward supplemental channels.
6. The method according to any one of claims 1 to 4, characterized in that when the overload level of the cell in the current period is not less than a third threshold and the overload level of the cell in a predetermined number of periods before the current period is successively greater than or equal to the first threshold, wherein the third threshold is greater than the first threshold, the method further comprises:
reducing forward channel transmission power of the terminals in the cell rapidly, removing a predetermined number of forward supplemental channels, and limiting soft handoff add of the terminals.
reducing forward channel transmission power of the terminals in the cell rapidly, removing a predetermined number of forward supplemental channels, and limiting soft handoff add of the terminals.
7. An apparatus for controlling forward power overload, characterized in that the apparatus comprises:
an acquisition unit, configured to acquire a transmission power of each cell corresponding to a same timestamp;
a determination unit, configured to determine an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell; and a processing unit, configured to, for the each cell, after having performed an overload control operation for a predetermined number of periods, limit access requests of terminals in the each cell according to the overload level, wherein the overload control operation does not comprise the operation of limiting access requests of the terminals in the each cell.
an acquisition unit, configured to acquire a transmission power of each cell corresponding to a same timestamp;
a determination unit, configured to determine an overload level of the transmission power of the each cell in each period according to the transmission power of the each cell; and a processing unit, configured to, for the each cell, after having performed an overload control operation for a predetermined number of periods, limit access requests of terminals in the each cell according to the overload level, wherein the overload control operation does not comprise the operation of limiting access requests of the terminals in the each cell.
8. The apparatus according to claim 7, characterized in that the processing unit comprises:
a first processing module, configured to, when an overload level of a cell is not greater than a first threshold in a current period and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, reduce upper limit of the forward channel transmission power of terminals in the cell, wherein the first threshold is not less than the second threshold;
and a second processing module, configured to, when the overload level of the cell is not less than the first threshold in the current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, limit the access requests of the terminals in the cell.
a first processing module, configured to, when an overload level of a cell is not greater than a first threshold in a current period and the overload level of the cell in a predetermined number of periods before the current period is not successively greater than or equal to a second threshold, reduce upper limit of the forward channel transmission power of terminals in the cell, wherein the first threshold is not less than the second threshold;
and a second processing module, configured to, when the overload level of the cell is not less than the first threshold in the current period and the overload level of the cell is successively greater than or equal to the first threshold in a predetermined number of periods before the current period, limit the access requests of the terminals in the cell.
9. The apparatus according to claim 7, characterized in that the acquisition unit comprises:
a receiving module, configured to receive a power report message from a channel board, wherein the power report message carries a transmission power of forward channels carried by the channel board and a timestamp of the report;
a judging module, configured to compare the timestamp of the report with a stored latest timestamp to judge whether there is a change; and a processing module, configured to store the transmission power in a situation that an output of the judging module is no; and acquire a transmission power of the each cell corresponding to the latest timestamp by calculation, update the latest timestamp, and store the transmission power in a situation that the output of the judging module is yes.
a receiving module, configured to receive a power report message from a channel board, wherein the power report message carries a transmission power of forward channels carried by the channel board and a timestamp of the report;
a judging module, configured to compare the timestamp of the report with a stored latest timestamp to judge whether there is a change; and a processing module, configured to store the transmission power in a situation that an output of the judging module is no; and acquire a transmission power of the each cell corresponding to the latest timestamp by calculation, update the latest timestamp, and store the transmission power in a situation that the output of the judging module is yes.
10. The apparatus according to claim 7, characterized in that the determination unit comprises:
an acquisition module, configured to acquire an overload percentage threshold of each level of a cell and a rated forward transmission power of the cell from predetermined configuration parameters;
a calculation module, configured to multiple the overload percentage threshold of each level of the cell with the rated forward transmission power of the cell to obtain a power threshold of each level of the cell; and a comparison module, configured to compare the transmission power of the each cell with the power threshold of each level respectively to obtain the overload level of the transmission power of the each cell.
an acquisition module, configured to acquire an overload percentage threshold of each level of a cell and a rated forward transmission power of the cell from predetermined configuration parameters;
a calculation module, configured to multiple the overload percentage threshold of each level of the cell with the rated forward transmission power of the cell to obtain a power threshold of each level of the cell; and a comparison module, configured to compare the transmission power of the each cell with the power threshold of each level respectively to obtain the overload level of the transmission power of the each cell.
11. The apparatus according to any one of claims 7 to 10, characterized in that, the first processing module is further configured to remove a predetermined number of forward supplemental channels.
12. The apparatus according to any one of claims 7 to 10, characterized in that, the second processing module is further configured to reduce forward channel transmission power of the terminals in the cell rapidly, remove a predetermined number of forward supplemental channels, and limit soft handoff add of the terminals when the overload level of the cell in the current period is not less than a third threshold and the overload level of the cell in a predetermined number of periods before the current period is successively greater than or equal to the first threshold, wherein the third threshold is greater than the first threshold.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910265589.7 | 2009-12-25 | ||
| CN200910265589A CN101754325A (en) | 2009-12-25 | 2009-12-25 | Forward power overload control method and device |
| PCT/CN2010/074414 WO2010149064A1 (en) | 2009-12-25 | 2010-06-24 | Method and device for forward power overload control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2785603A1 true CA2785603A1 (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2785603A Abandoned CA2785603A1 (en) | 2009-12-25 | 2010-06-24 | Method and apparatus for controlling forward power overload |
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| CN (1) | CN101754325A (en) |
| CA (1) | CA2785603A1 (en) |
| MX (1) | MX2012007433A (en) |
| RU (1) | RU2012130834A (en) |
| WO (1) | WO2010149064A1 (en) |
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| CN101754325A (en) * | 2009-12-25 | 2010-06-23 | 中兴通讯股份有限公司 | Forward power overload control method and device |
| CN102779044B (en) * | 2012-06-28 | 2016-01-20 | 用友软件股份有限公司 | The dissection process system of expression formula and analyzing and processing method |
| CN105025080B (en) * | 2015-06-02 | 2018-11-06 | 深圳市创梦天地科技有限公司 | A kind of overload protection method and server of distributed system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6094585A (en) * | 1997-11-14 | 2000-07-25 | Lucent Technologies Inc. | CDMA forward link power overload control in a base station |
| CN100409601C (en) * | 2001-07-25 | 2008-08-06 | 中兴通讯股份有限公司 | Forward power overload controlling method in CDMA system |
| CN101136671B (en) * | 2007-02-13 | 2011-08-10 | 中兴通讯股份有限公司 | Forward power overload control method |
| CN101174860B (en) * | 2007-11-14 | 2011-05-11 | 中兴通讯股份有限公司 | Forward power overloads control method |
| CN101547029B (en) * | 2008-03-28 | 2012-11-28 | 中兴通讯股份有限公司 | Method for controlling overloading of forward power in code division multiple access system |
| CN101754325A (en) * | 2009-12-25 | 2010-06-23 | 中兴通讯股份有限公司 | Forward power overload control method and device |
-
2009
- 2009-12-25 CN CN200910265589A patent/CN101754325A/en active Pending
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2010
- 2010-06-24 MX MX2012007433A patent/MX2012007433A/en not_active Application Discontinuation
- 2010-06-24 RU RU2012130834/07A patent/RU2012130834A/en not_active Application Discontinuation
- 2010-06-24 CA CA2785603A patent/CA2785603A1/en not_active Abandoned
- 2010-06-24 WO PCT/CN2010/074414 patent/WO2010149064A1/en active Application Filing
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| RU2012130834A (en) | 2014-01-27 |
| MX2012007433A (en) | 2012-12-05 |
| CN101754325A (en) | 2010-06-23 |
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