CN102833760A - Method and equipment for suppressing interference under condition of sharing of frequency spectrum by different systems - Google Patents
Method and equipment for suppressing interference under condition of sharing of frequency spectrum by different systems Download PDFInfo
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- CN102833760A CN102833760A CN2011101607520A CN201110160752A CN102833760A CN 102833760 A CN102833760 A CN 102833760A CN 2011101607520 A CN2011101607520 A CN 2011101607520A CN 201110160752 A CN201110160752 A CN 201110160752A CN 102833760 A CN102833760 A CN 102833760A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
- H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
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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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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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
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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
- H04W52/146—Uplink power control
Abstract
The embodiment of the invention discloses a method and equipment for suppressing interference under the condition of the sharing of frequency spectrum by different systems. According to the technical scheme of the invention, the downlink maximum transmission power and/or the uplink maximum transmission power of a cognitive cell on a cognitive frequency band is limited, so taht the interference between a cognitive system and an authoritative system is reduced effectively under the condition of the sharing of the frequency spectrum by the cognitive system and the authoritative system, the interference of the authoritative system to the downlink of the cognitive system is reduced, the interference of the cognitive system to the uplink and the downlink of the authoritative system is reduced, the cognitive system can use the idle frequency spectrum resource of the authoritative system under the condition of noninterference/low interference, the utilization efficiency of the frequency spectrum is improved, and the quality of the links is improved.
Description
Technical field
The present invention relates to communication technical field, disturbance restraining method and equipment between particularly a kind of different system under the frequency spectrum share situation.
Background technology
Development fast along with the mobile communication cause; The growing broadband wireless communications demand and the contradiction of limited frequency spectrum resource become clear day by day; Though at LTE (Long Term Evolution; Long Term Evolution) OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexi), MIMO (Multiple-Input Multiple-Out-put have been adopted; Multiple-input, multiple-output) etc. technology improves the availability of frequency spectrum, but these can not fundamentally solve the problem of limited frequency spectrum resource.
The frequency spectrum operating position of different radio connecting system changes with the region in time in IMT (International Mobile Telecommunication, the international mobile communication) frequency range, as with TD-SCDMA (Time Division-Synchronous Code Division Multiple Access; TD SDMA) covering chamber's exterior domain; And TD-LTE (Time Division-Long Term Evolution, time-division Long Term Evolution) provides the covering of hot zones, for example like office building; Be on duty the time; Personnel's major part concentrates on office building, and the TD-LTE load is very heavy, and is coming off duty or festivals or holidays; Personnel are dispersed in outdoor, and the TD-SCDMA load is heavier; Along with networking; The development of mobile communication technology; Operator also from 2G (2nd Generation, second generation GSM) network to 3G (3rd Generation, 3-G (Generation Three mobile communication system)); Even 4G (4th Generation, the 4th third-generation mobile communication system) network evolution.Often number of users is fewer at the operation initial stage for new network, and offered load is light, and frequency spectrum is idle, and old offered load is heavier, and frequency spectrum is nervous; After new network maturation, the user cause old network spectrum idle, and new network spectrum is nervous gradually to new network transitions.
Be applicable to that the frequency spectrum resource of cellular based communication is more and more in short supply on the one hand; The user is increasing to the transmission demand of data on the other hand; Unconfined is a unpractical problem for overweight RAT (Radio Access Technology, wireless access technology) the increase frequency spectrum of load enlarges network capacity.Realize that through cognitive radio technology sharing flexibly of frequency spectrum makes full use of idle frequency spectrum, can alleviate operator's frequency spectrum resource pressure in short supply to a great extent.Such as in the IMT frequency range; The wireless access system IMT-2000 and the IMT-Advanced of two kinds of multicarriers are through cognitive radio technology, shown in the application scenarios as shown in Figure 1; Two kinds of access networks can utilize the other side's idle carrier wave each other; Can improve spectrum utilization efficiency to a great extent, satisfy the demand of operator, alleviate the nervous situation of frequency spectrum resource frequency spectrum resource.
Because can use information through the mutual frequency spectrum that obtains alternately of information between the different RATs, particularly for the inner RATs of single operator, this information interaction realizes that more easily the dynamic adjustment of frequency spectrum resource is also carried out more easily.For realizing the frequency spectrum share of different RATs, can adopt center control nodes that RATs frequency spectrum operating position in the network is managed concentratedly.In network, pass through the function that a center controlled entity JSM (Joint Spectrum Management, cooperation spectrum management) accomplishes cognitive radio, specifically as shown in Figure 2.
JSM can collect the idle frequency spectrum information of each RATs; And generate the relevant decision-making of available free frequency range according to network configuration information and frequency spectrum policy; And can idle frequency range be offered other RAT as " cognitive frequency range " use or regain " cognitive frequency range " according to the spectrum requirement of other RAT.Authorize RAT that " cognitive frequency range " had highest priority, other RAT goes up work as cognitive RAT in " cognitive frequency range "; When authorizing RAT to claim " cognitive frequency range " back, the cognitive RAT that the JSM adjustment is operated on " cognitive frequency range " works on to other idle frequency spectrum, and " cognitive frequency range " returned mandate RAT.Network configuration information comprises information such as the carrier information, maximum transmission power of position, the configuration of each RAT base station, and network configuration information can upgrade according to the network equipment/variation of parameter.
Existing power control mode comprises open Loop Power control and closed power control.Open Loop Power control is at first to detect the base station pilot signals power that receives at travelling carriage, if the signal power that travelling carriage receives is little, it is big to be illustrated on the down link loss this moment, and thinks that thus the loss on the up link is also big.So in order to compensate the channel fading of this prediction, travelling carriage also increases transmitting power; Otherwise travelling carriage will reduce transmitting power.And closed power control is the means that remedy to reverse open Loop Power control inaccuracy; The base station is through the measurement to the up reception signal of travelling carriage; Estimation ascending power adjustment amount, at descending notice travelling carriage, travelling carriage is according to the whole uplink transmission power of the power adjustment commands tone of Chinese characters; Otherwise, reduce transmitting power.Equally, these class methods are also adopted in descending power control.
Come maximize system throughput through packet scheduling in the GSM, guarantee user's fairness as far as possible, to guarantee the quality of service requirement of different business stream.The method of scheduling comprises: repeating query algorithm, max carrier to interference algorithm, direct ratio fair algorithm.Repeating query algorithm circulation call each user, promptly say that from the scheduling probability each user takies Service Source (time slot, code channel, power etc.) with same probability.The max carrier to interference algorithm is only selected the user of max carrier to interference, promptly lets the best CU resource transmission data of channel condition, after this subscriber channel variation, selects the best user of other channel again.The direct ratio fair algorithm is to transmit for a long time on the roughly fair basis of data throughout keeping the user, considers simultaneously to utilize the short-term channel situation of change to increase efficiency of transmission.
In the process that realizes the embodiment of the invention, the applicant finds that there is following problem at least in prior art:
In communication network, realize frequency spectrum share; When authoring system Target cell frequency spectrum is idle; Can use for other system of one's respective area as cognitive frequency range this idle frequency spectrum, the system on this cognitive frequency range of being operated in thinks and is cognitive system, owing to this frequency range of authoring system Target cell adjacent area may not be in idle condition; The cognitive system of cognitive frequency range can produce authoring system Target cell adjacent area and disturb, thereby has reduced authoring system link-quality and network capacity.
Existing power control measure and user's scheduling strategy all are to consider this sub-district link-quality and network capacity.After introducing frequency spectrum share mechanism, existing power control and user's scheduling strategy can not reduce the interference of cognitive system to authoring system, can not suppress the interference of authoring system to cognitive system.Center controlled entity in network can not dynamically be adjusted the transmitting power of cognitive system according to the suffered disturbed condition of authoring system, thus the mechanism of protection authoring system.
Summary of the invention
The embodiment of the invention provides disturbance restraining method and the equipment under the frequency spectrum share situation between a kind of different system, solves the problem that existing power control and user's scheduling strategy can not reduce the phase mutual interference between cognitive system and the authoring system.
For achieving the above object, the embodiment of the invention provides the disturbance restraining method under the frequency spectrum share situation between a kind of different system on the one hand, comprising:
Limit descending maximum transmission power and/or the up maximum transmission power of cognitive sub-district on cognitive frequency range.
On the other hand, the embodiment of the invention also provides a kind of network equipment, comprises at least:
Communication module is used for carrying out uplink and downlink with the terminal equipment of said cognitive sub-district and communicates by letter, and communicates with the base station of authorizing the sub-district;
Limiting module is used for limiting said communication module descending maximum transmission power and/or up maximum transmission power to the terminal equipment of said cognitive sub-district on cognitive frequency range.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Limit descending maximum transmission power and/or the up maximum transmission power of cognitive sub-district on cognitive frequency range, thereby, can effectively reduce cognitive system and authoring system and share under the situation of frequency spectrum share; Interference between two systems; Comprise the interference of authoring system to the cognitive system down link, cognitive system makes cognitive system not disturb/hang down the idle frequency spectrum resource of use authority system under the disturbed condition to the interference of the uplink and downlink link of authoring system; Improve the utilization ratio of frequency spectrum, improve link-quality.
Description of drawings
Fig. 1 is the sketch map of the shared application scenarios of the idle carrier wave of different system of the prior art;
Fig. 2 is the application sketch map of center controlled entity (JSM) in the prior art;
The application scenarios sketch map of the disturbance restraining method between a kind of different system that Fig. 3 embodiment of the invention proposes under the frequency spectrum share situation;
Fig. 4 carries out the schematic flow sheet that descending open Loop Power control is handled for the cognitive sub-district that the embodiment of the invention proposed in cognitive frequency range;
Fig. 5 carries out the schematic flow sheet of downlink closed-loop power control and treatment in cognitive frequency range for the cognitive sub-district that the embodiment of the invention proposed;
Fig. 6 carries out the schematic flow sheet that uplink closed loop is handled for the cognitive sub-district that the embodiment of the invention proposed in cognitive frequency range;
Fig. 7 is the schematic flow sheet of the disturbance restraining method under the frequency spectrum share situation between the different system under a kind of concrete application scenarios of embodiment of the invention proposition;
Fig. 8 is the structural representation of a kind of network equipment of embodiment of the invention proposition.
Embodiment
Of background technology, along with the fast development of mobile communication business, telecom operators will face frequency spectrum resource problem in short supply.But the frequency spectrum operating position of the different RAT of wireless communication frequency band changes with the region in time, thereby causes some some RATs spectrum requirement of zone of some time bigger, and some RATs frequency of same area is idle relatively at this moment.
Fixing spectrum allocation may policy in a short time and can not change can realize sharing of frequency spectrum between the RATs through cognitive radio technology, improves the utilance of frequency spectrum.
The First Principles of cognitive radio is the protection to authoring system; Be that cognitive radio will use the idle frequency spectrum resource under the situation of not disturbing authoring system on the idle frequency spectrum; And authoring system comprises the authoring system in idle frequency spectrum zone and the authoring system of idle frequency spectrum adjacent domain; Therefore, the purpose of the technical scheme that the embodiment of the invention proposed is exactly the frequency spectrum resource that makes full use of the authoring system in idle frequency spectrum zone, reduces the interference to the authoring system of adjacent domain simultaneously.
Based on above-mentioned thinking; Different RATs utilize the other side's idle frequency spectrum resource (is cognitive frequency range for cognitive sub-district) each other in the technical scheme consideration wireless communication frequency band that the embodiment of the invention proposed through cognitive radio technology; Think that the RAT that is operated in cognitive frequency range is cognitive sub-district, then the cognitive sub-district of cognitive frequency range can produce the mandate sub-district of this frequency range adjacent area and disturb.
Accordingly; The embodiment of the invention has proposed between a kind of different system the disturbance restraining method under the frequency spectrum share situation between the different system under the frequency spectrum share situation; Realizing with cognitive radio under the condition of frequency spectrum share between different system,, reducing cognitive sub-district contiguous interference of authorizing the Uplink/Downlink of sub-district through the up/descending maximum transmission power of cognitive sub-district on cognitive frequency range limited; Simultaneously, can also reduce of the interference of mandate sub-district to cognitive cellular downlink.
In practical application; The technical scheme that the embodiment of the invention proposed also goes for other and has mandate/unauthorized (cognition); Main/inferior, perhaps in the wireless communication system of priority frequency spectrum share, the variation of concrete application scenarios can't influence protection scope of the present invention.
In the technical scheme of descending maximum transmission power and/or the up maximum transmission power of the cognitive sub-district of restriction proposed by the invention on cognitive frequency range; Comprise the restriction of descending maximum transmission power and up maximum transmission power two aspects, below describe respectively.
(1) restriction of the descending maximum transmission power of cognitive sub-district.
In the application scenarios of reality, the restriction of descending maximum transmission power further comprises the assignment procedure of initial downlink maximum transmission power, and the adjustment process of follow-up descending maximum transmission power, describes as follows respectively.
1, the assignment procedure of initial downlink maximum transmission power.
Concrete processing mode is confirmed the initial downlink maximum transmission power of cognitive sub-district on cognitive frequency range for according to the contiguous downstream signal power measurement situation of authorizing the edge termination equipment of sub-district to the base station of cognitive sub-district that is operated in cognitive frequency range.
Wherein, need to prove that the contiguous definite mode of the edge termination equipment of sub-district of authorizing that is operated in cognitive frequency range specifically comprises:
At first, the contiguous sub-district of authorizing that selection possibly influenced by cognitive sub-district, then, the selecteed contiguous sub-district a plurality of terminal equipments that selection is operated in cognitive frequency range according to link-quality of authorizing are as the edge termination equipment of authorizing the sub-district.
This shows; The reality of edge termination equipment is confirmed to be accomplished by the selecteed contiguous sub-district of authorizing, certainly, because for cognitive sub-district; The measured information of the edge termination equipment that is actually of relation; Rather than edge termination equipment itself, therefore, definite mode of concrete edge termination equipment can be set according to the needs of reality; And accomplish corresponding deterministic process by the contiguous sub-district of authorizing, confirm that the content change of mode can't influence protection scope of the present invention.
Based on definite process of above-mentioned edge termination equipment, the assignment procedure of corresponding initial downlink maximum transmission power specifically comprises:
(1) receives the descending power metrical information of the received cognitive sub-district of each edge termination equipment of sending selecteed contiguous base station of authorizing the sub-district.
(2), confirm the initial downlink maximum transmission power of cognitive sub-district on cognitive frequency range according to the descending power metrical information of cognitive sub-district.
Wherein, definite process of initial downlink maximum transmission power adopts the open loop transmit power control strategy.
If the size of the descending power metrical information of cognitive sub-district is big more; The size of the initial downlink maximum transmission power of then cognitive sub-district on cognitive frequency range is more little; If the size of the descending power metrical information of cognitive sub-district is more little, the size of the initial downlink maximum transmission power of then cognitive sub-district on cognitive frequency range is big more.
2, the adjustment process of follow-up descending maximum transmission power.
Concrete processing mode is for after starting working with the initial downlink maximum transmission power in the base station of cognitive sub-district; According to the contiguous measured interference measure that obtains of edge termination equipment of authorizing the sub-district that is operated in cognitive frequency range, adjust the descending maximum transmission power of cognitive sub-district on cognitive frequency range.
Equally, based on definite process of aforesaid edge termination equipment, the adjustment process of the descending maximum transmission power of corresponding subsequent specifically comprises:
(1) receives the selecteed contiguous measured interference measure that obtains of each edge termination equipment of authorizing the base station transmission of sub-district.
(2) according to the relation of interference measure, the descending maximum transmission power of cognitive sub-district on cognitive frequency range adjusted with corresponding threshold value.
Wherein, the adjustment process of descending maximum transmission power adopts the purpose of closed loop transmit power control strategy.
Corresponding regulation rule comprises:
If the size of interference measure then reduces the descending maximum transmission power of cognitive sub-district on cognitive frequency range greater than wealthy family limit value;
If the size of interference measure, then improves the descending maximum transmission power of cognitive sub-district on cognitive frequency range less than minimum threshold;
If the size of interference measure is not then adjusted the descending maximum transmission power of cognitive sub-district on cognitive frequency range between wealthy family's limit value and minimum threshold.
(2) restriction of the up maximum transmission power of cognitive sub-district.
The execution of this processing is in (one), to have confirmed to carry out behind the contiguous mandate sub-district equally, and concrete foundation is the contiguous measured interfere information in base station of authorizing this vicinity mandate sub-district that the sub-district feeds back.
Be that this processing is after starting working with the initial downlink maximum transmission power in the base station of cognitive sub-district; According to the contiguous measured interference measure that obtains in base station of authorizing the sub-district that is operated in cognitive frequency range, adjustment is operated in the up maximum transmission power of the terminal equipment of the cognitive sub-district on the cognitive frequency range.
Corresponding concrete processing procedure comprises:
(1) receives the selecteed contiguous measured interference measure that obtains in this base station of authorizing the base station transmission of sub-district.
(2), the up maximum transmission power of the terminal equipment that is operated in the cognitive sub-district on the cognitive frequency range is adjusted according to the relation of interference measure with corresponding threshold value.
Wherein, the adjustment process of up maximum transmission power adopts the purpose of closed loop transmit power control strategy.
Corresponding regulation rule comprises:
If the size of interference measure greater than wealthy family limit value, then reduces the up maximum transmission power of the terminal equipment that is operated in the cognitive sub-district on the cognitive frequency range;
If the size of interference measure less than minimum threshold, then improves the up maximum transmission power of the terminal equipment that is operated in the cognitive sub-district on the cognitive frequency range;
If the size of interference measure between wealthy family's limit value and minimum threshold, is not then adjusted the up maximum transmission power of the terminal equipment that is operated in the cognitive sub-district on the cognitive frequency range.
Need further be pointed out that the adjustment process of the follow-up descending maximum transmission power in above-mentioned (), and the interference measure that send the base station of related contiguous mandate sub-district in the processing in (two); Can be concrete measured parameter value, also can be the data message after changing according to preset rule, and the reason of such processing is; The foundation that the present technique scheme limits adjustment accordingly is not the numerical values recited of concrete interference measure, but whether corresponding interference influences the operate as normal of authorizing the sub-district, therefore; Can set corresponding interference threshold value,, then report an information representation to surpass the interference threshold value if measured concrete measured parameter value has surpassed the interference threshold value; Otherwise, then report an expression to surpass the information of interference threshold value, then; Information according to receiving is added up, if the situation that surpasses the interference threshold value too much (being above-mentioned greater than wealthy family limit value) representes that then present interference is strong excessively; Should reduce corresponding upstream or downstream maximum transmission power; If surpass the situation of interference threshold value very few (be above-mentioned less than minimum threshold), represent that then present interference ratio is less, tolerable interference margins is also bigger; Can improve corresponding upstream or downstream maximum transmission power; If be not above situation, represent that then present interference ratio is more moderate, can keep present upstream or downstream maximum transmit power limit not adjust.
Concrete application can be adjusted which kind of above-mentioned scheme according to actual needs, and such variation does not influence protection scope of the present invention.
Need further be pointed out that; In the operation of reality; Above-mentioned processing procedure specifically can be carried out by the base station of center controlled entity or cognitive sub-district; The selection of concrete executive agent can confirm that such variation does not influence protection scope of the present invention according to the situation that the real system structure is disposed and function is distributed.
On the other hand, above-mentioned cognitive frequency range is specially the idle frequency range that is not used in the authoring system.
It is to be noted; The restriction of above-mentioned descending maximum transmission power and up maximum transmission power two aspects can independently be applied in the concrete technological scene; Also can common application in concrete technological scene to increase the control effect of disturbing, such variation can't influence protection scope of the present invention.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Limit descending maximum transmission power and/or the up maximum transmission power of cognitive sub-district on cognitive frequency range, thereby, can effectively reduce cognitive system and authoring system and share under the situation of frequency spectrum share; Interference between two systems; Comprise the interference of authoring system to the cognitive system down link, cognitive system makes cognitive system not disturb/hang down the idle frequency spectrum resource of use authority system under the disturbed condition to the interference of the uplink and downlink link of authoring system; Improve the utilization ratio of frequency spectrum, improve link-quality.
Below, the application scenarios in conjunction with concrete describes the technical scheme that the embodiment of the invention proposed.
At first the problem that exists in the prior art is described as follows through concrete exemplary scene:
TD-LTE and TD-SCDMA colocation site are with covering; Two kinds of access technologies all adopt multi-carrier mode; Because the new and old transition of network, there is idle carrier resource in TD-SCDMA, and TD-LTE is overweight in load; Thereby the idle carrier wave raising TD-LTE network capacity through cognitive techniques TD-LTE can utilize TD-SCDMA sub-district under the colocation site is not in idle condition and be close to this carrier wave of TD-SCDMA sub-district.
Descending aspect; The TD-LTE down link that is operated in the idle carrier wave frequency range of TD-SCDMA receives the interference of contiguous TD-SCDMA co-frequency cell base station; And contiguous TD-SCDMA cellular downlink receives the interference of the TD-LTE base station that is operated in idle frequency range, and descending interference is even more serious at cell edge; Up aspect, the TD-LTE up link that is operated in idle frequency range receives the interference of contiguous TD-SCDMA co-frequency cell edge termination, and contiguous TD-SCDMA co-frequency cell base station receives the interference of the TD-LTE edge termination that is operated in idle frequency range.
This shows that existing power control measure and user's scheduling strategy all are to consider this sub-district link-quality and network capacity.After introducing frequency spectrum share mechanism, existing power control and user's scheduling strategy can not reduce cognitive sub-district to authorizing the phase mutual interference between the sub-district, can not suppress to authorize the interference of sub-district to cognitive sub-district.Center controlled entity in network can not dynamically be adjusted the transmitting power of cognitive system according to the suffered disturbed condition of authoring system, thus the mechanism of protection authoring system.
The technical scheme that the embodiment of the invention proposed mainly is to realize under the frequency spectrum share situation in order to solve the above-mentioned cognitive radio technology that passes through; Authorize the interference between sub-district and the cognitive sub-district to suppress problem; Concrete technical thought be through to cognitive sub-district cognitive frequency range descending/uply carry out maximum power constraint, reduce since between the different system that frequency spectrum share causes on/descending interference.
As shown in Figure 3; With the TD network is example, if TD-SCDMA and TD-LTE frequency spectrum share are used the idle carrier resource of TD-SCDMA sub-district with the TD-LTE sub-district in zone; Think that two sub-districts are respectively target TD-LTE sub-district and target TD-SCDMA sub-district, this idle carrier resource is cognitive frequency range.
According to the technical scheme of the embodiment of the invention, corresponding processing scheme comprises:
Target TD-LTE sub-district reduces its maximum transmission power on cognitive frequency range, reduce its covering radius, thereby, can effectively reduce dl interference to the TD-SCDMA edge customer of Target cell adjacent area.
The processing mode of such scheme is protected and contiguous authorize cell uplink and the down link of this cognition frequency range with work frequently promptly through the uplink and downlink maximum power of cognitive sub-district in cognitive frequency range limited.In concrete enforcement scene, according to the difference of the power control mode that is adopted, corresponding processing procedure comprises following three parts:
First, cognitive sub-district are in the descending open Loop Power control of cognitive frequency range.
Concrete processing procedure is as shown in Figure 4, and corresponding processing procedure comprises:
The base station selected contiguous sub-district of authorizing that influenced by cognitive sub-district of step S401, cognitive sub-district.
The edge termination equipment of N terminal equipment of cognitive frequency range as this mandate sub-district is selected to be operated in according to link-quality in step S402, the selecteed contiguous sub-district of authorizing.
Step S403, selecteed contiguous down-bound pilot frequency signal of authorizing the sub-district to trigger the above-mentioned cognitive sub-district of N edge termination device measuring; Estimate the base station of cognitive sub-district and the path loss between the above-mentioned edge termination equipment, and path loss estimated value and edge termination equipment are sent to the base station of cognitive sub-district at the interference level of this time period.
Fusion treatment is carried out to the result who receives in the base station of step S404, cognitive sub-district.
It is to be noted; In the application scenarios of reality, the processing procedure of above-mentioned step S403 and step S404 is actually the base station that the base station of authorizing the sub-district directly reports cognitive sub-district with the interferometry information and the positional information of edge termination, afterwards; The corresponding information that receives can be carried out the calculation process of correspondence in the base station of cognitive sub-district; Promptly confirm to be distributed in edge termination in each position range current the actual disturbed condition that bears, the method for concrete calculation process can be to confirm the residing position range in respective edges terminal according to concrete circuit loss value, then; In each position range; Through the concrete current average interference situation of bearing in algorithm computation respective edges terminal, in this process, the setting of position range rule; And the content of the computational algorithm of average interference situation can set according to the needs of reality, and such variation does not influence protection scope of the present invention.
On the other hand; Consider the volume of transmitted data between the base station of the base station of authorizing the sub-district and cognitive sub-district, and adopt under the situation of such scheme that the processing of the base station of cognitive sub-district is loaded; Can carry out the calculation process of correspondence by the base station of authorizing the sub-district to the corresponding information that edge termination reported; Promptly confirm to be distributed in the actual disturbed condition that bears of the current institute of edge termination in each position range, and the result of corresponding operation processing is sent to the base station of cognitive sub-district by the base station of authorizing the sub-district, certain; In order further to reduce volume of transmitted data; Can on the base station of authorizing the sub-district, configuration report threshold value accordingly, only the order of severity of disturbed condition surpasses when reporting threshold value accordingly in concrete position range, just corresponding disturbed condition is reported the base station of cognitive sub-district; Perhaps directly corresponding position range is reported the base station of cognitive sub-district, limit the corresponding descending maximum transmission power of relevant position scope the base station that makes cognitive sub-district.
Above-mentioned processing scheme can be set according to actual needs; Every base station of cognitive sub-district that can make knows that the scheme of the position range that limit descending maximum transmission power all can be applied in the embodiment of the invention, and such variation does not influence protection scope of the present invention.
The base station of step S405, cognitive sub-district is according to the path loss situation and the interference level that merge, calculates the interference that the terminal equipment of authorizing the sub-district can also bear, thereby confirms the descending maximum transmission power of cognitive sub-district in cognitive frequency range.
Step S406, cognitive sub-district in cognitive frequency range with above-mentioned descending maximum transmission power as the initial downlink maximum transmission power of cognitive sub-district in cognitive frequency range, carry out downstream signal emission and handle.
Can know that by above explanation the processing procedure of above-mentioned first is to confirm the initial downlink maximum transmission power of cognitive sub-district in cognitive frequency range.
Second portion, cognitive sub-district are controlled at the downlink closed-loop power of cognitive frequency range.
The processing of this part is to have confirmed to carry out after the down initial maximum transmission power of cognitive sub-district in cognitive frequency range in first, and concrete processing procedure is as shown in Figure 5, and corresponding processing procedure comprises:
Above-mentioned N edge termination device measuring dl interference situation regularly triggered in step S501, the selecteed contiguous sub-district of authorizing, and interference measure and thresholding are compared, and comparative result is sent to the base station of cognitive sub-district with 1bit information.
In concrete enforcement scene, report accordingly rule can for:
Interference measure>thresholding, then report 1;
< thresholding then reports 0 to interference measure.
Sue for peace to the interference report result in the base station of step S502, cognitive sub-district.
If summing value>thresholding A, then execution in step S503;
If summing value < thresholding B, then execution in step S504;
If thresholding A is < summing value < thresholding B, then execution in step S505.
Concrete; Above-mentioned processing procedure is a kind of concrete scheme that the embodiment of the invention proposes; The numerical information that specifically reports, and a kind of preferred exemplary of just providing for the ease of explanation of corresponding summing mode are as long as can make cognitive sub-district determine whether to trigger the restriction operation of corresponding downstream maximum transmission power; The concrete variation that reports with judgment rule can't influence protection scope of the present invention.
The cognitive sub-district of the base station triggers of step S503, cognitive sub-district reduces a grade at the descending maximum transmission power of cognitive frequency range.
The base station of step S504, cognitive sub-district allows cognitive sub-district to improve a grade at the descending maximum transmission power of cognitive frequency range.
The base station of step S505, cognitive sub-district does not adjust the descending emission maximum of cognitive sub-district in cognitive frequency range.
Can find out that by above explanation the purpose of the processing of this part is according to the current actual conditions of system cognitive sub-district to be adjusted at the descending maximum transmission power of cognitive frequency range.
Situation three, cognitive sub-district are in the uplink closed loop of cognitive frequency range.
The processing of this part is carried out after first has confirmed contiguous mandate sub-district, promptly after step S401 accomplishes, just can begin corresponding processing at least, and concrete processing procedure is as shown in Figure 6, and corresponding processing procedure comprises:
Step S601, selecteed vicinity are authorized the base station measurement uplink channel interference situation of sub-district, and interference measure and thresholding are compared, and comparative result is sent to the base station of cognitive sub-district with 1bit information.
In concrete enforcement scene, report accordingly rule can for:
Interference measure>thresholding, then report 1;
< thresholding then reports 0 to interference measure.
Sue for peace to the interference report result in the base station of step S602, cognitive sub-district.
If summing value>thresholding C, then execution in step S603;
If summing value < thresholding D, then execution in step S604;
If thresholding C is < summing value < thresholding D, then execution in step S605.
Concrete; Above-mentioned processing procedure is a kind of concrete scheme that the embodiment of the invention proposes; The numerical information that specifically reports, and a kind of preferred exemplary of just providing for the ease of explanation of corresponding summing mode are as long as can make cognitive sub-district determine whether to trigger the restriction operation of corresponding up maximum transmission power; The concrete variation that reports with judgment rule can't influence protection scope of the present invention.
The up maximum transmission power that the base station triggers of step S603, cognitive sub-district is operated in the cognitive cell terminal equipment of cognitive frequency range reduces a grade.
The up maximum transmission power that the base station of step S604, cognitive sub-district allows to be operated in the cognitive cell terminal equipment of cognitive frequency range improves a grade.
The base station of step S605, cognitive sub-district does not adjust the up emission maximum of the cognitive cell terminal equipment that is operated in cognitive frequency range.
Can find out that by above explanation the purpose of the processing of this part is according to the interference measure of reality the up maximum transmission power of the cognitive cell terminal equipment that is operated in cognitive frequency range to be adjusted.
Need further be pointed out that; The processing procedure of three kinds of above-mentioned situation all is to be realized by the base station of cognitive sub-district, still, and in the application scenarios of reality; Also can realize above-mentioned processing by center controlled entity (JSM); This just changes the executive agent of corresponding function, and for the particular content of technical scheme and adjust, such variation does not influence protection scope of the present invention.
Need to prove that above-mentioned contiguous notion of authorizing the sub-district to be different from adjacent sub-district in the existing network needs the strict covering of considering the sub-district, transmitting power, antenna performance is confirmed this neighboring BS relationship.
Further, based on the application scenarios that comprises center controlled entity (JSM), above-mentioned technical scheme is described; Consider colocation site with the TD-LTE and the internetwork frequency spectrum share of TD-SCDMA that cover, the distribution that realizes idle carrier wave through JSM in the network is (in practical application, if there is not JSM in the network system; Then carry out the correlation function processing of JSM) by the base station of cognitive sub-district; And suppose that TD-LTE utilizes the idle carrier resource of TD-SCDMA, the TD-SCDMA sub-district that has idle carrier wave is target TD-SCDMA sub-district, based on above-mentioned enforcement scene; The technical scheme that the embodiment of the invention proposed is as shown in Figure 7, specifically may further comprise the steps:.
The frequency spectrum operating position that step S701, JSM collect TD-LTE and TD-SCDMA is analyzed available idle frequency spectrum resource.
Step S702, if JSM confirms that there is idle carrier wave in certain regional aim TD-SCDMA, and heavier with the target TD-LTE load in zone, whether JSM evaluating objects TD-LTE the idle carrier resource of target TD-SCDMA capable of using.
If of course, execution in step S703 then;
If cannot, process ends then.
Step S703, JSM trigger in the contiguous TD-SCDMA sub-district of the target TD-SCDMA that receives potential interference and are operated in the up RSCP estimation of above-mentioned idle carrier wave frequency range path loss, and N terminal equipment selecting the path loss maximum is as the cell edge terminal equipment.
The down-bound pilot frequency signal of step S704, above-mentioned N cell edge terminal equipment measurement target of contiguous TD-SCDMA base station triggers TD-LTE; Thereby estimation path loss; Simultaneously, this N terminal equipment reports nearest interference measure, and the base station is uploaded to JSM with path loss estimated value and interference measure.
Step S705, JSM select minimum path loss estimated value and maximum interference measured value in the reported result, and calculate the descending interference that can also bear at present of contiguous TD-SCDMA, thereby estimation target TD-LTE is at the maximum transmission power of cognitive frequency range.
Step S706, this target of JSM configuration TD-LTE make TD-LTE generate auxilliary carrier wave in cognitive frequency range, and its maximum transmission power receives above-mentioned Power Limitation.
Step S703 is the assignment procedure of aforesaid initial downlink maximum transmission power to step S706.
Step S707, contiguous TD-SCDMA cell operation are added up down link ISCP at the terminal equipment of N cell edge of above-mentioned idle frequency range, and ISCP and thresholding are compared, and regularly measurement result are reported JSM with 1bit.
If ISCP value>thresholding, then report 1;
Otherwise, if < thresholding then reports 0 to the ISCP value.
In concrete enforcement scene, threshold value be long-time statistical the ISCP value x doubly.
Step S708, JSM sue for peace to the interference report result, and handle accordingly according to the magnitude relationship of summing value and respective doors limit value.
If summing value>thresholding A, then trigger target TD-LTE and reduce cognitive frequency range and fall grade of capable maximum transmission power, < thresholding B then allow target TD-LTE to improve grade of cognitive frequency range maximum transmission power, otherwise transmitting power does not adjust as if summing value.
Step S707 and step S708 are the adjustment process of aforesaid follow-up descending maximum transmission power.
The up ISCP of step S709, the above-mentioned idle frequency range of contiguous TD-SCDMA base station measurement, and handle accordingly according to the magnitude relationship of measured value and respective doors limit value.
If the ISCP of a period of time>thresholding C, the terminal of then triggering the cognitive frequency range of target TD-LTE reduces grade of transmitting power, if ISCP thresholding D then allows the terminal of the cognitive frequency range of target TD-LTE to improve grade of transmitting power, otherwise, power is not adjusted.
Step S709 is the limit processing process of the up maximum transmission power of aforesaid cognitive sub-district.
It is to be noted; The adjustment process of step S707 and the described follow-up descending maximum transmission power of step S708; And the limit processing process of step up maximum transmission power that S709 describes is two relatively independent processes, is to set the processing procedure after accomplishing and being employed at the initial downlink maximum transmission power, do not have inevitable sequencing; The sign that above-mentioned needs just provide for the ease of explanation can't influence protection scope of the present invention.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Limit descending maximum transmission power and/or the up maximum transmission power of cognitive sub-district on cognitive frequency range, thereby, can effectively reduce cognitive system and authoring system and share under the situation of frequency spectrum share; Interference between two systems; Comprise the interference of authoring system to the cognitive system down link, cognitive system makes cognitive system not disturb/hang down the idle frequency spectrum resource of use authority system under the disturbed condition to the interference of the uplink and downlink link of authoring system; Improve the utilization ratio of frequency spectrum, improve link-quality.
In order to realize the technical scheme of the embodiment of the invention, the embodiment of the invention also provides a kind of network equipment, and its structural representation is as shown in Figure 8.
In concrete enforcement scene; This network equipment specifically can provide service for the terminal equipment in the cognitive sub-district, is the base station of cognitive sub-district, perhaps; This network equipment also can should the cognition sub-district and contiguous center controlled entity of authorizing the sub-district for correspondence, and this network equipment comprises at least:
Limiting module 82 is used for limiting telecommunication module 81 descending maximum transmission power and/or up maximum transmission power to the terminal equipment of cognitive sub-district on cognitive frequency range.
Wherein, communication module 81 specifically is used for:
The descending power metrical information of the cognitive sub-district that each edge termination equipment that send the base station of the contiguous mandate of reception sub-district is received, and this vicinity is authorized the measured interference measure that obtains in base station of sub-district;
According to limiting module 82 determined descending maximum transmission power, carry out downlink communication with the terminal equipment of cognitive sub-district.
Further, limiting module 82 specifically is used for:
The descending power metrical information of the cognitive sub-district that receives according to communication module 81 is confirmed the initial downlink maximum transmission power of cognitive sub-district on cognitive frequency range;
After communication module 81 is started working with the initial downlink maximum transmission power, according to the received measured interference measure that obtains of each edge termination equipment of communication module 81, the descending maximum transmission power of adjustment communication module 81 on cognitive frequency range.
On the other hand, limiting module 82 also is used for authorizing according to these received vicinities of communication module 81 the measured interference measure that obtains in base station of sub-district, and adjustment is operated in the up maximum transmission power of the terminal equipment of the cognitive sub-district on the cognitive frequency range.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Limit descending maximum transmission power and/or the up maximum transmission power of cognitive sub-district on cognitive frequency range, thereby, can effectively reduce cognitive system and authoring system and share under the situation of frequency spectrum share; Interference between two systems; Comprise the interference of authoring system to the cognitive system down link, cognitive system makes cognitive system not disturb/hang down the idle frequency spectrum resource of use authority system under the disturbed condition to the interference of the uplink and downlink link of authoring system; Improve the utilization ratio of frequency spectrum, improve link-quality.
Through the description of above execution mode, those skilled in the art can be well understood to the embodiment of the invention and can realize through hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; The technical scheme of the embodiment of the invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, or network equipment etc.) each implements the described method of scene to carry out the embodiment of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred sketch map of implementing scene, module in the accompanying drawing or flow process might not be that embodiment of the present invention embodiment is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of implementing scene just to description.
More than the disclosed several practical implementation scenes that are merely the embodiment of the invention, still, the embodiment of the invention is not limited thereto, any those skilled in the art can think variation all should fall into the traffic limits scope of the embodiment of the invention.
Claims (14)
1. the disturbance restraining method under the frequency spectrum share situation between a different system is characterized in that, may further comprise the steps at least:
Limit descending maximum transmission power and/or the up maximum transmission power of cognitive sub-district on cognitive frequency range.
2. the method for claim 1 is characterized in that, the descending maximum transmission power of the cognitive sub-district of said restriction on cognitive frequency range specifically comprises:
According to the contiguous downstream signal power measurement situation of authorizing the edge termination equipment of sub-district that is operated in cognitive frequency range, confirm the initial downlink maximum transmission power of said cognitive sub-district on cognitive frequency range to the base station of said cognitive sub-district;
After starting working with said initial downlink maximum transmission power in the base station of said cognitive sub-district; According to the contiguous measured interference measure that obtains of edge termination equipment of authorizing the sub-district that is operated in cognitive frequency range, adjust the descending maximum transmission power of said cognitive sub-district on cognitive frequency range.
3. method as claimed in claim 2 is characterized in that, the said contiguous definite mode of authorizing the edge termination equipment of sub-district that is operated in cognitive frequency range specifically comprises:
The contiguous sub-district of authorizing that selection possibly influenced by said cognitive sub-district;
The edge termination equipment of a plurality of terminal equipments of cognitive frequency range as said mandate sub-district is selected to be operated in according to link-quality in the selecteed contiguous sub-district of authorizing.
4. method as claimed in claim 3; It is characterized in that; Said basis is operated in the contiguous downstream signal power measurement situation of authorizing the edge termination equipment of sub-district to the base station of said cognitive sub-district of cognitive frequency range; Confirm the initial downlink maximum transmission power of said cognitive sub-district on cognitive frequency range, specifically comprise:
Receive the descending power metrical information of the received said cognitive sub-district of each edge termination equipment of sending said selecteed contiguous base station of authorizing the sub-district;
According to the descending power metrical information of said cognitive sub-district, confirm the initial downlink maximum transmission power of said cognitive sub-district on cognitive frequency range;
Wherein, Definite process of said initial downlink maximum transmission power adopts the open loop transmit power control strategy; If the size of the descending power metrical information of said cognitive sub-district is big more; The size of the initial downlink maximum transmission power of then said cognitive sub-district on cognitive frequency range is more little, if the size of the descending power metrical information of said cognitive sub-district is more little, the size of the initial downlink maximum transmission power of then said cognitive sub-district on cognitive frequency range is big more.
5. method as claimed in claim 3; It is characterized in that; Said basis is operated in the contiguous measured interference measure that obtains of edge termination equipment of authorizing the sub-district of cognitive frequency range, adjusts the descending maximum transmission power of said cognitive sub-district on cognitive frequency range, specifically comprises:
Receive the said selecteed contiguous measured interference measure that obtains of each edge termination equipment of authorizing the base station transmission of sub-district;
According to the relation of said interference measure, the descending maximum transmission power of said cognitive sub-district on cognitive frequency range adjusted with corresponding threshold value;
Wherein, The adjustment process of said descending maximum transmission power adopts the purpose of closed loop transmit power control strategy; If the size of said interference measure is greater than wealthy family limit value; Then reduce the descending maximum transmission power of said cognitive sub-district on cognitive frequency range, if the size of said interference measure, then improves the descending maximum transmission power of said cognitive sub-district on cognitive frequency range less than minimum threshold; If the size of said interference measure is not then adjusted the descending maximum transmission power of said cognitive sub-district on cognitive frequency range between wealthy family's limit value and minimum threshold.
6. method as claimed in claim 2 is characterized in that, the up maximum transmission power of the cognitive sub-district of said restriction on cognitive frequency range specifically comprises:
After starting working with said initial downlink maximum transmission power in the base station of said cognitive sub-district; According to the contiguous measured interference measure that obtains in base station of authorizing the sub-district that is operated in cognitive frequency range, adjustment is operated in the up maximum transmission power of the terminal equipment of the said cognitive sub-district on the cognitive frequency range.
7. method as claimed in claim 6; It is characterized in that; Said basis is operated in the contiguous measured interference measure that obtains in base station of authorizing the sub-district of cognitive frequency range, and adjustment is operated in the up maximum transmission power of the terminal equipment of the said cognitive sub-district on the cognitive frequency range, specifically comprises:
Receive the said selecteed contiguous measured interference measure that obtains in said base station of authorizing the base station transmission of sub-district;
According to the relation of said interference measure, the said up maximum transmission power that is operated in the terminal equipment of the said cognitive sub-district on the cognitive frequency range is adjusted with corresponding threshold value;
Wherein, The adjustment process of said up maximum transmission power adopts the purpose of closed loop transmit power control strategy; If the size of said interference measure is greater than wealthy family limit value; Then reduce the said up maximum transmission power that is operated in the terminal equipment of the said cognitive sub-district on the cognitive frequency range; If the size of said interference measure is less than minimum threshold; Then improve the said up maximum transmission power that is operated in the terminal equipment of the said cognitive sub-district on the cognitive frequency range, if the size of said interference measure is not then adjusted the said up maximum transmission power that is operated in the terminal equipment of the said cognitive sub-district on the cognitive frequency range between wealthy family's limit value and minimum threshold.
8. like any described method in the claim 1 to 7, it is characterized in that descending maximum transmission power and/or the up maximum transmission power of the cognitive sub-district of said restriction on cognitive frequency range specifically carried out by the base station of center controlled entity or said cognitive sub-district.
9. like any described method in the claim 1 to 7, it is characterized in that said cognitive frequency range is specially:
The idle frequency range that is not used in the authoring system.
10. a network equipment is characterized in that, comprises at least:
Communication module is used for carrying out uplink and downlink with the terminal equipment of said cognitive sub-district and communicates by letter, and communicates with the base station of authorizing the sub-district;
Limiting module is used for limiting said communication module descending maximum transmission power and/or up maximum transmission power to the terminal equipment of said cognitive sub-district on cognitive frequency range.
11. the network equipment as claimed in claim 10 is characterized in that, said communication module specifically is used for:
The descending power metrical information of the said cognitive sub-district that each edge termination equipment that send the base station of the contiguous mandate of reception sub-district is received, and the measured interference measure that obtains in base station of said contiguous mandate sub-district;
According to the determined descending maximum transmission power of said limiting module, carry out downlink communication with the terminal equipment of said cognitive sub-district.
12. the network equipment as claimed in claim 11 is characterized in that, said limiting module specifically is used for:
The descending power metrical information of the said cognitive sub-district that receives according to said communication module is confirmed the initial downlink maximum transmission power of said cognitive sub-district on cognitive frequency range;
After said communication module is started working with said initial downlink maximum transmission power; According to the received measured interference measure that obtains of each edge termination equipment of said communication module, adjust the descending maximum transmission power of said communication module on cognitive frequency range.
13. the network equipment as claimed in claim 11 is characterized in that, said limiting module also is used for:
According to the received said contiguous measured interference measure that obtains in base station of authorizing the sub-district of said communication module, adjustment is operated in the up maximum transmission power of the terminal equipment of the said cognitive sub-district on the cognitive frequency range.
14. like any described network equipment in the claim 10 to 13, it is characterized in that, be specially:
The base station of said cognitive sub-district; Or,
Corresponding said cognitive sub-district and said contiguous center controlled entity of authorizing the sub-district.
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| CN201110160752.0A CN102833760B (en) | 2011-06-15 | 2011-06-15 | Disturbance restraining method between different system in frequency spectrum share situation and equipment |
| PCT/CN2012/073047 WO2012171386A1 (en) | 2011-06-15 | 2012-03-26 | Interference suppression method and device for inter-system frequency spectrum sharing |
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| CN201110160752.0A CN102833760B (en) | 2011-06-15 | 2011-06-15 | Disturbance restraining method between different system in frequency spectrum share situation and equipment |
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Also Published As
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| WO2012171386A1 (en) | 2012-12-20 |
| CN102833760B (en) | 2015-08-12 |
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
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Effective date of registration: 20210607 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |