CN102196549B - Method and system for controlling power of common channel - Google Patents
Method and system for controlling power of common channel Download PDFInfo
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- CN102196549B CN102196549B CN201010138960.6A CN201010138960A CN102196549B CN 102196549 B CN102196549 B CN 102196549B CN 201010138960 A CN201010138960 A CN 201010138960A CN 102196549 B CN102196549 B CN 102196549B
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Abstract
The invention discloses a method and a system for controlling power of a common channel. The method comprises the following steps that: if user equipment determines that the quality of a current wireless coverage cannot meet a requirement, a communication request signal is transmitted to system equipment; and an access entity of the system equipment controls the transmitting power of the common channel according to the received communication request signal. By adopting the technical scheme, the transmitting power of the common channel can be reasonably controlled according to the actual need of the user equipment; the energy consumption of the whole wireless communication network is reduced, and the radio frequency pollution and the radio frequency interference of the whole network coverage area are reduced; and the interference between the access entities can be reduced and the system gain is obtained.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to a kind of public channel power control method and system.
Background technology
The wireless communication system of current extensive use comprises: GSM (Global System for MobileCommunications, global system for mobile communications), WCDMA (Wideband Code DivisionMultiple Access, Wideband Code Division Multiple Access (WCDMA)), CDMA2000, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, TD SDMA), WIMAX (Worldwide Interoperability for Microwave Access, worldwide interoperability for microwave accesses), LTE (Long Term Evolution, Long Term Evolution), WLAN (Wireless Local Area Networks, WLAN (wireless local area network)) etc., in these wireless communication systems composition, generally two parts can be divided into: subscriber equipment and system equipment.Subscriber equipment (User Equipment is called for short UE) can be mobile phone, computer, data card etc., also referred to as mobile terminal; System equipment then comprises core net, base station controller, base station or wireless router etc.
At present, in traditional wireless communication system, whether no matter have subscriber equipment to need to communicate, no matter have how many communications of user equipment, no matter communications user equipment, system equipment all needs the common channel information of launching constant power if where being in.
Be illustrated in figure 1 traditional network operation schematic diagram.7 cellular cells have been shown in Fig. 1, and wherein border circular areas part represents common signal channel coverage.In traditional wireless communication system, no matter wherein how subscriber equipment distributes, and whether in communication, common signal channel all will cover all regions always, launches by the constant power of configuration always.And subscriber equipment time in fact many in community does not need so large public channel power, such as, now subscriber equipment is not had to communicate in community 1, so there is no necessity and launch so large public channel power always, thus cause energy waste, also radio-frequency pollution is caused to environment simultaneously.
In sum, the wireless transmitter power consumption of current system equipment takies the significant proportion that whole network power consumes.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of public channel power control method and system, can save the energy resource consumption of wireless communication system, reduces radio-frequency pollution.
In order to solve the problem, the invention provides a kind of public channel power control method, described method comprises:
If subscriber equipment judges that current wireless covering quality does not satisfy the demands, then launch communication request signal to system equipment;
The access entity of system equipment controls public channel transmissive power according to the described communication request signal received.
Further, described access entity carries out control to public channel transmissive power and refers to:
When described access entity receives the communication request signal of described subscriber equipment, if current common channel transmitting power is less than maximum public channel transmissive power Pmax, then by current common channel transmitting power lifting rising step-length, or described Pmax is directly adopted to launch common signal channel.
Further, described subscriber equipment is measured current wireless covering quality in following situation and is judged whether to satisfy the demands: subscriber equipment needs initiating communication, or subscriber equipment needs to carry out cell merge judgement in a communication state, or subscriber equipment needs to carry out community change judgement in an idle state.
Further, described subscriber equipment is after launching communication request signal to system equipment, again wireless coverage quality is detected after crossing certain hour interval, if still do not satisfied the demands, then launch communication request signal with larger emitted energy to system equipment, until reach the emission maximum energy of communication request signal.
Further, when needs are from described access entity initiating communication, described access entity adopts described Pmax to launch common signal channel, or, by current common channel transmitting power lifting rising step-length.
Further, described access entity setting up has timer, if within the time-count cycle of this timer, described access entity initiating communication, or the communication request signal of subscriber equipment detected, then, after controlling current common channel transmitting power, described timer re-starts timing;
If when arriving the time-count cycle of this timer, described access entity does not have initiating communication, the communication request signal of subscriber equipment do not detected, then current common channel transmitting power is reduced a decline step-length or after being reduced to zero, described timer re-starts timing yet.
Further, the value of described rising step-length is greater than described decline step-length.
Further, the form of described communication request signal adopts generalized hierarchical Gray code sequence of complex numbers
Cgolay, it is defined as:
a＝<1，1，1，1，1，1，-1，-1，1，-1，1，-1，1，-1，-1，1>，
Cgolay＝(1+j) <a，a，a，-a，-a，a，-a，-a，a，a，a，-a，a，-a，a，a>；
Wherein, j is the imaginary part unit of plural number.
Present invention also offers a kind of public channel power control system, comprise system equipment access entity and subscriber equipment, described access entity comprises communication request signal detection module and public channel power control module, described subscriber equipment comprises wireless coverage quality measurement module and communication request signal generation module, wherein:
Described wireless coverage quality measurement module is used for, when subscriber equipment needs to ensure wireless coverage quality, measure current wireless covering quality and judge whether current wireless covering quality satisfies the demands, if do not met, then notifying described communication request signal generation module;
Described communication request signal generation module is used for, and the notice according to described wireless coverage quality measurement module generates communication request signal and launches;
Described communication request signal detection module is used for, and after receiving described communication request signal, notifies described public channel power control module;
Described public channel power control module is used for, and the notice according to described communication request signal detection module controls public channel transmissive power.
Further, described wireless coverage quality measurement module is further used for, measure current wireless covering quality in following needs and judge whether to satisfy the demands when ensureing wireless coverage quality: subscriber equipment needs initiating communication, or subscriber equipment needs to carry out cell merge judgement in a communication state, or subscriber equipment needs to carry out community change judgement in an idle state.
Further, described access entity also comprises Service Processing Module, during for detecting that described access entity needs initiating communication, notifies described public channel power control module;
Described public channel power control module also for, the notice according to described Service Processing Module controls public channel transmissive power.
Further, described public channel power control module is used for controlling as follows public channel transmissive power: when receiving the notice of described communication request signal detection module or described Service Processing Module, if current common channel transmitting power is less than maximum public channel transmissive power Pmax, then by current common channel transmitting power lifting rising step-length, or described Pmax is directly adopted to launch common signal channel.
Further, described public channel power control module comprises timer further,
Described public channel power control module also for: if within the time-count cycle of this timer, receive the notice of described communication request signal detection module or described Service Processing Module, then after controlling public channel transmissive power, described timer re-starts timing;
If when arriving the time-count cycle of this timer, both the notice of described communication request signal detection module had not been received, the notice of described Service Processing Module is not received yet, then current common channel transmitting power is reduced a decline step-length or after being reduced to zero, described timer re-starts timing.
Further, described communication request signal generation module also for, transmitting described communication request signal after, feed back to described wireless coverage quality measurement module; And, receive wireless coverage quality measurement module again launch the notice of communication request signal after, launch communication request signal with larger emitted energy to system equipment, until reach the emission maximum energy of communication request signal;
Described wireless coverage quality measurement module also for, according to described feedback, cross behind certain hour interval and again wireless coverage quality detected, if still do not satisfied the demands, then notify that described communication request signal generation module launches communication request signal again.
Adopt technical solution of the present invention, access entity progressively can reduce public channel transmissive power, also can quick-recovery public channel transmissive power soon.
Beneficial effect of the present invention at least comprises: wireless communication system of the present invention reasonably can control public channel transmissive power, saves the energy resource consumption of whole cordless communication network, reduces radio-frequency pollution and the interference of whole network coverage area; Also can reduce the interference of access inter-entity simultaneously, obtain system gain.
Accompanying drawing explanation
The network operation schematic diagram that Fig. 1 is traditional;
Fig. 2 is the system equipment access entity common signal channel control flow chart of the embodiment of the present invention;
Fig. 3 is the communication request flow chart that the subscriber equipment of the embodiment of the present invention needs when ensureing wireless coverage quality;
Fig. 4 is the comprising modules schematic diagram of the public channel power control system of the embodiment of the present invention;
Fig. 5 is the network operation schematic diagram according to technical solution of the present invention;
Fig. 6 is public channel transmissive power change schematic diagram.
Embodiment
Basic thought of the present invention is: provide a kind of mechanism adjusted system equipment public channel power according to the actual demand of subscriber equipment, subscriber equipment needs to ensure wireless coverage quality, judge whether current wireless covering quality satisfies the demands, if satisfied the demands, then continue normal communication process or idle process; If do not met, then launch communication request signal to system equipment.System equipment controls public channel transmissive power according to the communication request signal of subscriber equipment.
Like this, when wireless coverage quality can not meet the demand of subscriber equipment, system equipment can improve public channel transmissive power or directly adopt the maximum public channel transmissive power Pmax of configuration; And when subscriber equipment does not need communication, system equipment can reduce public channel transmissive power and even public channel transmissive power be reduced to zero.Thus reach the energy resource consumption of saving whole wireless communication system, reduce the object of radio-frequency pollution.
Based on above-mentioned thought, the present invention specifically adopts following technical scheme:
If subscriber equipment judges that current wireless covering quality does not satisfy the demands, then launch communication request signal to system equipment;
The access entity of system equipment controls public channel transmissive power according to the described communication request signal received.
Wherein, when the access entity of system equipment receives the communication request signal of subscriber equipment, public channel transmissive power is controlled as follows: if current common channel transmitting power is less than maximum public channel transmissive power Pmax, then by current common channel transmitting power lifting step-length, or directly adopt maximum public channel transmissive power Pmax.
Further, subscriber equipment, when needs ensure wireless coverage quality, is measured current wireless covering quality and is judged whether to satisfy the demands, if do not met, then launches communication request signal to system equipment;
Wherein, subscriber equipment needs to ensure wireless coverage quality in following situation: subscriber equipment needs initiating communication, or subscriber equipment needs to carry out cell merge judgement in a communication state, or subscriber equipment needs to carry out community change judgement in an idle state, etc.
Further, subscriber equipment is after launching communication request signal to system equipment, again wireless coverage quality is detected after crossing certain hour interval, if still do not met, then launch communication request signal with larger emitted energy to system equipment, until reach the emission maximum energy of subscriber equipment; If subscriber equipment launches communication request signal with emission maximum energy to system equipment, and after crossing certain hour interval, wireless coverage quality does not still satisfy the demands, be then transformed into other frequency frequency ranges or other wireless communication systems.
Wherein, judge that the index whether wireless coverage quality satisfies the demands can comprise: the signal strength signal intensity receiving down public guide frequency channel, the signal to noise ratio etc. of down public guide frequency channel.Signal strength signal intensity is stronger, and signal to noise ratio is higher, then wireless coverage quality is better.
Further, if need the access entity initiating communication from system equipment, then access entity and adopt maximum public channel transmissive power Pmax to launch common signal channel, or, by current common channel transmitting power lifting rising step-length.
Further, access entity setting up timer, within the time-count cycle of this timer, if access entity initiating communication, or the communication request signal of subscriber equipment detected, then, after controlling current common channel transmitting power, timer re-starts timing;
If when arriving the time-count cycle of this timer, access entity does not have initiating communication, the communication request signal of subscriber equipment do not detected, then current common channel transmitting power is reduced a decline step-length or after being reduced to zero, timer re-starts timing yet.
Below in conjunction with the accompanying drawings and the specific embodiments the enforcement of technical solution of the present invention is described in further detail.
Fig. 2 is the common signal channel control flow chart of the system equipment access entity of the embodiment of the present invention.Community in wireless base station or base station, sector etc. can as access entity.As shown in Figure 2, this flow process is described below:
Step 201, after access entity initialization, namely starts timer;
During access entity initialization, configure maximum public channel transmissive power Pmax.Namely this Pmax is equivalent to the common signal channel fixed transmission power in conventional art.
Step 202, access entity constantly detects communication request signal, if communication request signal detected, or access entity wants initiating communication, such as paging etc., then perform next step 203, otherwise, after timer arrives time-count cycle T1, perform step 205;
Step 203, the power P max transmitting common signal channel of access entity configuration, or by current common channel transmitting power lifting rising step-length UpDeltaP (if the power after lifting is greater than Pmax, then using Pmax), and perform next step 204;
Wherein, if access entity detection is to communication request signal, then thinks and have user to need the better network coverage to communicate, can lifting public channel transmissive power, also can the maximum power Pmax of direct recovery configuring; And if access entity wants initiating communication, then the maximum power Pmax of preferred directly recovery configuring.
Step 204, resets timer, returns step 201 and restart timing;
Step 205, timer arrives T1 time-count cycle, if access entity does not detect communication request signal in the T1 time period this time-count cycle, does not also have new initiating communication, then performs next step 206;
Step 206, T1 time-count cycle is reached during timer, then represent in nearest time period T1 and communication request signal do not detected, the communication that entity is newly initiated is not accessed yet, now public channel transmissive power can be reduced, such as current common channel transmitting power is reduced a decline step-length DeltaP (if current transmit power is less, as being less than DeltaP, then directly transmitting power can be reduced to 0), then, forward step 204 to be reset by timer, timer restarts timing.
Fig. 3 is the process chart that subscriber equipment needs when ensureing wireless coverage quality.As shown in Figure 3, this flow process is described below:
Step 301, subscriber equipment needs to ensure wireless coverage quality;
Wherein, subscriber equipment needs to ensure wireless coverage quality in following situation: subscriber equipment needs new initiating communication, or subscriber equipment needs to carry out cell merge judgement in a communication state, or subscriber equipment needs to carry out community change judgement in an idle state, etc.
Particularly, subscriber equipment, when new traffic initiated by needs, needs measure current wireless covering quality and judge whether to satisfy the demands; And when being under communication or idle condition, can periodically measuring current wireless covering quality and judging whether to satisfy the demands.
Step 302, subscriber equipment is measured current wireless covering quality and is judged whether to satisfy the demands, if met, then perform step 303, otherwise current wireless covering quality is poor, cannot meet the demand of subscriber equipment, performs step 304;
Step 303, wireless coverage is good, can normally work;
Step 304, subscriber equipment launches communication request signal to system equipment, then performs next step 305;
Step 305, subscriber equipment is again measured current wireless covering quality after crossing certain hour interval T 2 and is judged whether to satisfy the demands, if met, then performs step 303; If the demand of subscriber equipment still cannot be met, then perform step 306;
Step 306, subscriber equipment judges whether can also the emitted energy of communication request signal, if so, then performs step 307, otherwise, perform step 308;
Step 307, subscriber equipment launches communication request signal with larger emitted energy to system equipment, then returns step 305;
Step 308, if subscriber equipment with very large energy can not obtain need wireless coverage quality, then think that this communication request is attempted unsuccessfully, subscriber equipment need consideration be transformed into other frequency frequency range even other wireless systems go communicate.
In the present invention's concrete example, the form of described communication request signal can adopt one section of good generalized hierarchical Gray code of autocorrelation performance (Generalised Hierarchical Golay Sequence) sequence, and it is defined as:
a＝<1，1，1，1，1，1，-1，-1，1，-1，1，-1，1，-1，-1，1>，
Cgolay＝(1+j)×<a，a，a，-a，-a，a，-a，-a，a，a，a，-a，a，-a，a，a>；
Wherein, j is the imaginary part unit of plural number.
Visible, Cgolay is one and comprises 256 plural sequences.Communication request signal can be that the one or many of sequence of complex numbers Cgolay repeats.Such as, the length of communication request signal can be the sequence of 256 plural numbers, also can be 512 plural sequences etc.But the form of the communication request signal in the present invention is not limited to above-mentioned example.
As can be seen from the handling process of said system equipment and subscriber equipment, if system equipment access entity receives the communication request signal of subscriber equipment and does not launch common signal channel with Pmax, then this access entity by (such as 5ms) as early as possible directly recoverys Pmax transmitting common signal channel or lifting power rising step-length UpdeltaP (if the power after lifting is greater than Pmax, then use Pmax), if and both do not received communication request signal in T1 a time-count cycle, also do not initiate new traffic, then will reduce public channel transmissive power.
And subscriber equipment is not when self needing communication, only monitor the communication request (as paging request) whether having system equipment to this subscriber equipment.When needs communicate, first subscriber equipment measures current wireless covering quality, in addition, when subscriber equipment is in communications status, also need periodic measurement current wireless covering quality, if it is determined that current wireless covering quality meets communication requirement, then proceed normal communication; If it is determined that current wireless covering quality does not satisfy the demands, then launch the wireless signal of communication request to system equipment.After transmitting communication request signal, cross behind certain hour interval and can remeasure current network coverage quality, just continue with larger power emission communication request signal if also do not satisfied the demands, until to satisfy the demands or cannot bring to power again.
Wherein, time-count cycle, the length of T1 can be arranged arbitrarily, generally can be located at hundreds of millisecond between tens seconds, but the present invention was not limited to this concrete span.And the step-length UpDeltaP and the preferred 0.1dB ~ 3dB of decline step-length DeltaP that rises, also can with watt or milliwatt office, such as 10 milliwatts, to 2000 milliwatts, equally, are also not limited to listed concrete span.In addition, preferably, the size of rising step-length UpDeltaP is greater than decline step-length DeltaP, and like this, system equipment can reach the public channel transmissive power met needed for subscriber equipment demand rapidly, reduces the number of times that communication request signal launched by subscriber equipment.
Fig. 4 shows the high-level schematic functional block diagram of the public channel power control system of the embodiment of the present invention.This public channel power control system comprises system equipment access entity and subscriber equipment, and wherein, antenna, receiver, transmitter and Service Processing Module etc. are the basic modules that wireless communication devices and subscriber equipment must have.
The public channel power control system of the present embodiment has following characteristics:
1. system equipment is realizing beyond original function, adds two functional modules, i.e. communication request signal detection module and public channel power control module, wherein:
Communication request signal detection module is used for, and whether detect from the Received signal strength that receiver obtains has communication request signal, if communication request signal detected, then communication request signal detection module needs notice public channel power control module;
Public channel power control module is used for, and carries out public channel power control: on the one hand, and public channel power control module receives the information of Service Processing Module, judges whether that accessing entity needs to initiate new communication; On the other hand, the information of public channel power control module received communication request signal detection module, has judged whether that communication request signal is detected.
Public channel power control module itself needs maintenance timer, as the output of public channel power control module, public channel power control module needs according to cycle T during timer 1 service control processing module and transmitter, the public channel transmissive power reducing Service Processing Module even closes transmitter, or service control processing module recovers common signal channel process, also needs to open transmitter if transmitter is in closed condition.
Concrete, if public channel power control module is within the time-count cycle of timer, receive the notice of communication request signal detection module or Service Processing Module, then, after public channel transmissive power is controlled, timing is re-started to timer;
If when arriving the time-count cycle of this timer, both the notice of communication request signal detection module had not been received, do not receive the notice of Service Processing Module, then current common channel transmitting power is reduced a decline step-length or after being reduced to zero, timing is re-started to timer yet.
2. subscriber equipment is at antenna, receiver, and transmitter and these basic modules of Service Processing Module add communication request signal generation module, for when wireless coverage is second-rate, generates communication request signal and sends into transmitter and launch.
In addition, wireless coverage quality detection module is the module that in prior art, subscriber equipment is necessary, but in the present invention, the function of this module is improved, if the current wireless covering quality measurement result display network coverage is poor, need this information to be issued communication request signal generation module, the generation of triggered communication request signal and transmitting.Communication request signal transmitter module, for the information of coming from wireless coverage quality measurement module, needs whether transmit communication request signal to its feedback.
Wireless coverage quality measurement module is according to described feedback, if have sent communication request signal, then wireless coverage quality measurement module also needs to remeasure wireless coverage quality in system just now and frequency, again wireless coverage quality is detected after crossing certain hour interval, if still do not satisfied the demands, then notify that described communication request signal generation module launches communication request signal again; Communication request signal generation module receive wireless coverage quality measurement module again launch the notice of communication request signal after, launch communication request signal with larger emitted energy to system equipment, until reach the emission maximum energy of communication request signal;
If do not launch communication request signal, then think and communication request failure on examining system just now and frequency can forward other frequency even other systematic survey wireless coverage quality to.
Be illustrated in figure 5 according to network operation schematic diagram of the present invention.After adopting technical solution of the present invention, in community 1, do not have subscriber equipment to communicate, public channel power can reduce to 0, saves public channel transmissive power.In community 2, all subscriber equipmenies are all in center of housing estate areas adjacent, be not in the subscriber equipment of cell edge, now common signal channel there is no need to launch with the maximum public channel power Pmax of configuration, but significantly can reduce public channel transmissive power.Community 3,4, in 5, the subscriber equipment communicated also is not in cell edge, also significantly can reduce public channel power.In community 6 and community 7, there is subscriber equipment to be in cell edge and communicate, needing to launch with Pmax.Can find out, relative to Fig. 1, the power consumption of common signal channel after adopting technical solution of the present invention, can be significantly reduced.
Fig. 6 shows the time dependent schematic diagram of certain access entity public channel transmissive power.In figure, transverse axis is the time, and the longitudinal axis is public channel transmissive power.Wherein solid line is the common signal channel transmitting of conventional method, launches with the rated power Pmax of configuration always.Dotted line is the transmit power variation curve controlling lower common signal channel according to power of the present invention.Suppose just to start to launch with Pmax, do not detect after having crossed time T1 that communication request signal does not access the communication of entity initiation yet, then public channel power is reduced DeltaP, then reclocking.If intermediate examination and measurement to communication request signal (such as communication request signal 1,2,3) then by transmitting power lifting UpDeltaP.When communication request is more at short notice (such as communication request 4,5,6,7), access entity can quickly recover to power P max.For communication request 8, access entity transmits with Pmax, then only need keep launching with Pmax.When connecing entity initiating communication, also power directly can be returned to or remain Pmax, then reclocking.As can be seen from this curve example, the common signal channel consumed power through power control is obviously few than conventional method.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a public channel power control method, is characterized in that, described method comprises:
If subscriber equipment judges that current wireless covering quality does not satisfy the demands, then launch communication request signal to system equipment;
The access entity of system equipment controls public channel transmissive power according to the described communication request signal received;
Described subscriber equipment is measured current wireless covering quality in following situation and is judged whether to satisfy the demands: subscriber equipment needs initiating communication.
2. control method as claimed in claim 1, is characterized in that,
Described access entity carries out control to public channel transmissive power and refers to:
When described access entity receives the communication request signal of described subscriber equipment, if current common channel transmitting power is less than maximum public channel transmissive power Pmax, then by current common channel transmitting power lifting rising step-length, or described Pmax is directly adopted to launch common signal channel.
3. control method as claimed in claim 1, is characterized in that,
Described subscriber equipment is also measured current wireless covering quality in following situation and is judged whether to satisfy the demands: subscriber equipment needs to carry out cell merge judgement in a communication state, or subscriber equipment needs to carry out community change judgement in an idle state.
4. the control method as described in claim 1,2 or 3, is characterized in that,
Described subscriber equipment is after launching communication request signal to system equipment, again wireless coverage quality is detected after crossing certain hour interval, if still do not satisfied the demands, then launch communication request signal with larger emitted energy to system equipment, until reach the emission maximum energy of communication request signal.
5. the control method as described in claim 1,2 or 3, is characterized in that,
When needs are from described access entity initiating communication, described access entity adopts described Pmax to launch common signal channel, or, by current common channel transmitting power lifting rising step-length.
6. control method as claimed in claim 5, is characterized in that,
Described access entity setting up has timer, if within the time-count cycle of this timer, described access entity initiating communication, or the communication request signal of subscriber equipment detected, then after controlling current common channel transmitting power, described timer re-starts timing;
If when arriving the time-count cycle of this timer, described access entity does not have initiating communication, the communication request signal of subscriber equipment do not detected, then current common channel transmitting power is reduced a decline step-length or after being reduced to zero, described timer re-starts timing yet.
7. control method as claimed in claim 6, is characterized in that,
The value of described rising step-length is greater than described decline step-length.
8. the control method as described in claim 1 or 3, is characterized in that,
The form of described communication request signal adopts generalized hierarchical Gray code sequence of complex numbers Cgolay, and it is defined as:
a＝<1,1,1,1,1,1,-1,-1,1,-1,1,-1,1,-1,-1,1>，
Cgolay＝(1+j)×<a,a,a,-a,-a,a,-a,-a,a,a,a,-a,a,-a,a,a>；
Wherein, j is the imaginary part unit of plural number.
9. a public channel power control system, it is characterized in that, comprise system equipment access entity and subscriber equipment, described access entity comprises communication request signal detection module and public channel power control module, described subscriber equipment comprises wireless coverage quality measurement module and communication request signal generation module, wherein:
Described wireless coverage quality measurement module is used for, when subscriber equipment needs to ensure wireless coverage quality, measure current wireless covering quality and judge whether current wireless covering quality satisfies the demands, if do not met, then notifying described communication request signal generation module;
Described communication request signal generation module is used for, and the notice according to described wireless coverage quality measurement module generates communication request signal and launches;
Described communication request signal detection module is used for, and after receiving described communication request signal, notifies described public channel power control module;
Described public channel power control module is used for, and the notice according to described communication request signal detection module controls public channel transmissive power;
Described wireless coverage quality measurement module is further used for, and measures current wireless covering quality and judges whether to satisfy the demands: subscriber equipment needs initiating communication in following needs when ensureing wireless coverage quality.
10. control system as claimed in claim 9, is characterized in that,
Described wireless coverage quality measurement module is further used for, measure current wireless covering quality in following needs and judge whether to satisfy the demands when ensureing wireless coverage quality: subscriber equipment needs to carry out cell merge judgement in a communication state, or subscriber equipment needs to carry out community change judgement in an idle state.
11. control system as claimed in claim 9, is characterized in that,
Described access entity also comprises Service Processing Module, during for detecting that described access entity needs initiating communication, notifies described public channel power control module;
Described public channel power control module also for, the notice according to described Service Processing Module controls public channel transmissive power.
12. control system as described in claim 9,10 or 11, is characterized in that,
Described public channel power control module is used for controlling as follows public channel transmissive power: when receiving the notice of described communication request signal detection module or described Service Processing Module, if current common channel transmitting power is less than maximum public channel transmissive power Pmax, then by current common channel transmitting power lifting rising step-length, or described Pmax is directly adopted to launch common signal channel.
13. control system as claimed in claim 12, is characterized in that,
Described public channel power control module comprises timer further,
Described public channel power control module also for: if within the time-count cycle of this timer, receive the notice of described communication request signal detection module or described Service Processing Module, then after controlling public channel transmissive power, described timer re-starts timing;
If when arriving the time-count cycle of this timer, both the notice of described communication request signal detection module had not been received, the notice of described Service Processing Module is not received yet, then current common channel transmitting power is reduced a decline step-length or after being reduced to zero, described timer re-starts timing.
14. control system as described in claim 9,10 or 11, is characterized in that,
Described communication request signal generation module also for, transmitting described communication request signal after, feed back to described wireless coverage quality measurement module; And, receive wireless coverage quality measurement module again launch the notice of communication request signal after, launch communication request signal with larger emitted energy to system equipment, until reach the emission maximum energy of communication request signal;
Described wireless coverage quality measurement module also for, according to described feedback, cross behind certain hour interval and again wireless coverage quality detected, if still do not satisfied the demands, then notify that described communication request signal generation module launches communication request signal again.
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|---|---|---|---|---|
| WO2006011347A1 (en) * | 2004-07-30 | 2006-02-02 | Matsushita Electric Industrial Co., Ltd. | Wireless transmitter and wireless transmitting method |
| CN1780171A (en) * | 2004-11-26 | 2006-05-31 | 华为技术有限公司 | Method for controlling public channel transmissive power in base station |
| CN101154970A (en) * | 2006-09-30 | 2008-04-02 | 中兴通讯股份有限公司 | Method for power control based on service quality |
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2010
- 2010-03-19 CN CN201010138960.6A patent/CN102196549B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011347A1 (en) * | 2004-07-30 | 2006-02-02 | Matsushita Electric Industrial Co., Ltd. | Wireless transmitter and wireless transmitting method |
| CN1780171A (en) * | 2004-11-26 | 2006-05-31 | 华为技术有限公司 | Method for controlling public channel transmissive power in base station |
| CN101154970A (en) * | 2006-09-30 | 2008-04-02 | 中兴通讯股份有限公司 | Method for power control based on service quality |
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| CN102196549A (en) | 2011-09-21 |
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