CN105636058A - Dynamic spectrum distribution method of CoMP system based on auction - Google Patents
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Abstract
The present invention discloses a dynamic spectrum distribution method of a CoMP (Coordinated Multi-point) system based on auction. Aiming at the condition that authorization users in the CoMP system have free frequency bands, a multi-band frequency and multi-winner dynamic spectrum distribution method based on auction is designed through combination of the joint transmission technology and the auction theory of the CoMP system. The dynamic spectrum distribution method comprises: an auction preparation phase, an auction phase and an arrangement phase. The method is able to improve the communication quality of cooperation cell users through the CoMP joint processing technology, enhance the whole system throughput, improve the frequency spectrum utilization rate and the whole incoming of the CoMP system. The dynamic spectrum distribution method of a CoMP system based on auction is close to the real communication scene, is easy to operate, realize, extend and the like, is suitable for effective distribution of the free frequency bands of the CoMP system, and is helpful for the development of the traditional static frequency spectrum distribution method of the CoMP system to the dynamic spectrum distribution method.
Description
Technical field
The present invention relates to wireless communication technology field, it is specifically related to the method for allocating dynamic frequency spectrums of a kind of CoMP system based on auction.
Background technology
Along with the fast development of next-generation mobile communications technology, the business demand of radio communication is improved constantly by user, how to improve the availability of frequency spectrum of radio communication system, how to improve the throughput capacity of radio communication service, always be the focus that wireless communication field is urgently paid close attention to. Based on the development demand to following radio communication broadband high-speed data service, third generation partner plan (3GPP) expands the research work towards 4G. Cooperative multipoint transmission (CoordinatedMulti-point, CoMP) system is due to can by improving the communication quality of Cell Edge User, thus improve the throughput capacity of overall communication system, therefore it is widely regarded as one of candidate technologies that in 4G Mobile Communication Development process, most is potential.
Although the frequency spectrum resource distribution that is introduced as of CoMP system brings new vitality, but the frequency spectrum resource allocation method of intrinsic CoMP system is the apportioning method of a kind of static state. The band allocation of CoMP system is CoMP frequency band and NonCoMP frequency band by the static spectrum division of CoMP system, has relatively independent scheduling between each frequency band. But, this kind of band allocation very flexible, causes the availability of frequency spectrum of CoMP system lower. Due to the scarcity of frequency spectrum resource and non-renewable, how by limited frequency spectrum resource dynamic assignment in CoMP system, and then the availability of frequency spectrum improving CoMP system is also study the emphasis of CoMP system from now on.
Auction theory is a kind of based on market mechanism, has fairness and high efficiency concurrently, is widely used in radio communication system and distributes limited resources. In order to improve the availability of frequency spectrum of CoMP system, we are in CoMP system, introduce auction theoretical, devise the method for allocating dynamic frequency spectrums of a kind of multiband multi-win man based on auction mechanism. The method combines CoMP system and auction theory, it is possible not only to utilize coordinate multipoint combination treatment (CoMP-JP) technology in CoMP system to improve the data throughput amount of community user, it is also possible to improved the availability of frequency spectrum and the system benefit of CoMP system by the form of dynamic auction.
Summary of the invention
It is an object of the invention to have the situation of idle frequency band for the mandate user in CoMP system, theoretical in conjunction with CoMP system and auction, it is proposed to the method for allocating dynamic frequency spectrums of the multiband multi-win man of a kind of CoMP system based on auction. This method for allocating dynamic frequency spectrums comprises three phases: the auction preparatory stage, auction stage, arrangement stage. The mandate user that the present invention mainly considers in CoMP system has multiple idle frequency band, when unauthorized user disturbs mutually, by the mode of auction, the idle frequency band in CoMP system is carried out dynamic assignment, select multiple winner, and utilize the data throughput amount of the joint transmission skill upgrading winner of CoMP system. The dynamic band allocation method of the multiband multi-win man based on auction that this invention proposes, laminating practical communication background, for promoting data throughput amount, the availability of frequency spectrum and the integral benefit of CoMP system.
First the present invention supposes in CoMP system, there is unauthorized user and authorizes user. User is authorized to have idle frequency band, it is possible to promote self benefits by the form of auction; Unauthorized user can hold idle frequency band by the mode of lease, improves the communication quality of self. Then, in order to communication of fitting is actual, ensure the communication quality of winner, by design interference matrix, the interference situation of the unauthorized user participating in auction is added up. Finally, according to above-mentioned condition, we propose the dynamic band allocation method of a kind of theoretical based on auction multiband multi-win man, the idle frequency band authorizing user is auctioned, determine winner according to interference matrix and auction rules, and utilize the data throughput amount of the joint transmission skill upgrading winner in CoMP system.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is as follows:
The method for allocating dynamic frequency spectrums of a kind of CoMP system based on auction, by based on the CoMP system model of auction mechanism and the method for allocating dynamic frequency spectrums of interference matrix design a kind of multiband multi-win man, the idle frequency band of CoMP system is effectively distributed, comprises the steps:
(1) auction the preparatory stage:
1) in CoMP system, it is assumed that the user having idle frequency band, for authorizing user, authorizes user can obtain temporary transient income by auction idle frequency band; Assuming that the user participating in auction bid is unauthorized user, unauthorized user can hold idle frequency band by the mode of auction and improve communication quality; Suppose that each authorizes user to have an idle frequency band to be auctioned simultaneously, all treat auction frequency band without differences feature, and idle frequency band quantity to be auctioned supply exceed demand; Unauthorized user is buyer, and buyer's set is N={1,2,3...n}; Authorizing user to be seller, seller's set is S={1,2,3 ... s}; Idle frequency band set to be vended is C={c1,c2,c3...cs;
2) there are three cooperation cell in CoMP system, have an evolved base station (eNB) in each cooperation cell, the role of central location is played the part of in three eNB rotations; Central location is not only responsible for the associating transfer of user in cooperation cell, improves the data throughput amount of user, also serves as frequency spectrum middle man in auction process;
3) central location broadcast auction information, auction information comprises the idle frequency band quantity, the geography information of unauthorized user and the average reserve price p of idle frequency band to be vended that collectc. In order to ensure each communication quality taking turns winner in auction process, central location is regular with interference by the geographical position information of the unauthorized user collected, setting interference matrix I. This interference matrix I is the matrix of the capable n row of n.
(2) auction the stage:
1) unauthorized user i is to the C in idle frequency range set C to be vended1Frequency range is bid b by the mode of sealing bidiTo central location, namely each unauthorized user's information of bidding is separate and sealing. Central location collects all unauthorized user bids, obtains bid matrix B, B=[b1,b2,b3....bn]. Central location selects first round auction winner by greedy criterion, and the note the highest bid of epicycle is b1h, highest bidder is epicycle winner. Simultaneously by frequency range C1Distribute to this winner, record a1=1. If epicycle does not select winner, a1=0.
2) all eNB in central location integration and cooperation community, carry out combination treatment to winner, by the combination treatment technology of CoMP, the undesired signal of winner are changed into useful signal, improve the data throughput amount of winner. Subsequently, upgrade buyer and gather N and winner gathers W. Central location is gathered buyer and is rejected epicycle winner in N, gathers winner and counts epicycle winner in W, and the frequency band that will have distributed is rejected from idle frequency range set C.
3) central location carries out rotation according to cooperation cell order, starts the 2nd and takes turns auction. Central location collects frequency range bid information, and according to greedy criterion and interference matrix setting, finds the unauthorized user that bid is the highest, be defined as candidate winner. Then, if epicycle candidate winner and the first round winner occur interference, then epicycle candidate winner is given up, i.e. a2=0, joined the winner given up simultaneously and gathered Naban; If epicycle candidate winner interference situation does not occur with first round winner, then determine this candidate winner's epicycle auction winner, i.e. a2=1. With reason, winner being carried out combination treatment, renewal unauthorized user gathers N and winner gathers W; Repeat the step in auction stage, until it is empty set that buyer gathers N;
(3) arrangement stage:
1) winner interference rule due to setting being rejected gathers NabanArrange, and to set N within the scope of cooperation cellabanIn element reselect random site;
2) winner given up is gathered NabanAdd buyer and gather N, repeat auction phase process, until the winner given up gathers NabanFor empty set, obtain final distribution set A={a1,a2,a3...anAnd winner gather W, according to the bottom line value U of formula (1) computing system
Described interference rule is: if the spacing of i-th unauthorized user and jth unauthorized user is less than 2RI, then there is interference, i-th row of corresponding interference matrix I in rice, the value of jth row is 1, i.e. I between i and jij=1; Otherwise, if the spacing of i-th unauthorized user and jth unauthorized user is more than or equal to 2RI, then there is not interference, I between i and j in riceij=0; Wherein RIFor the interference radius distance of unauthorized user in interference matrix I.
The step 2 in described auction stage) in, central location obtains the channel condition information feedback of other eNB in cooperation cell by the backhaul link that interface is X2, and this channel condition information feedback mainly comprises two aspects: channel quality instruction and channel direction information. User in cooperation cell is carried out combination treatment according to the channel condition information feedback of above-mentioned backhaul link by central location, and undesired signal user received is converted into useful signal, promotes the data throughput amount of user in cooperation cell.
In auction process, in order to ensure to obtain the communication quality of frequency band winner, if epicycle winner and first run auction winner have interference, the winner that epicycle is auctioned is given up, and the winner this given up joins the winner given up gathers NabanIn, namely epicycle does not determine winner; Follow-up auction process takes turns the rule continuation of setting according to the 2nd, until buyer's set is empty set.
In the described arrangement stage, the U of the bottom line value of computing system also has following restricted condition:
ai�� { 0,1}, i=1,2,3...S (2)
Wherein, aiIt is the allocation of parameters of the frequency range i often taking turns auction process, ajIt it is the allocation of parameters of the frequency range j often taking turns auction process; S is the number of frequency bands to be auctioned that seller has; pcFor the average reserve price of frequency range to be vended; biFor often taking turns the bid of buyer i in auction process; Iij=1 expression i-th unauthorized user and jth unauthorized user disturb mutually. Restricted condition (2) regulation is often taken turns in auction process, and winner can only obtain a single frequency range; The buyer that restricted condition (3) regulation is often taken turns in auction process bids the average reserve price of frequency range that must be greater than central location setting; Restricted condition (4) is ensure that the user of interference mutually can not become winner in each circulation auction process simultaneously.
The useful effect of the present invention is: the present invention can be used for effectively being distributed by the idle frequency band in CoMP system. Particularly by combining the theoretical joint transmission technology with CoMP system of auction, improve the data throughput amount of cooperation cell user, improving the availability of frequency spectrum and the system benefit of CoMP system, the frequency spectrum distributing method being of value in CoMP system moves towards dynamically more to be close to practical application from static state. The present invention has certain actual application background, has the advantages such as easy operation, easily realization, easily expansion.
Accompanying drawing explanation
Fig. 1 is the CoMP system model schematic based on auction;
Fig. 2 is the multiband multi-win man method for allocating dynamic frequency spectrums schematic diagram of the CoMP system based on auction;
Fig. 3 is the multiband multi-win man method for allocating dynamic frequency spectrums schema of the CoMP system based on auction.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details, but it is not limitation of the invention.
As shown in Figure 1, in the CoMP system model schematic based on auction, community 1, community 2, community 3 constitute the cooperation cell in CoMP system. User in cooperation cell is divided into authorizes user and unauthorized user according to whether having idle frequency band. User is authorized to have idle frequency band, it is possible to obtain temporary transient income by auction idle frequency band; Unauthorized user can improve the communication quality of self by holding idle frequency band. Mandate user in cooperation cell is seller, and unauthorized user is buyer. ENB in each community can as the central location in whole cooperation cell. In auction process, central location is possible not only to connect other eNB in community, also plays the part of the role of frequency spectrum middle man simultaneously, is responsible for the dynamic auction process of frequency band. Central location can obtain the channel condition information feedback of other eNB in cooperation cell by the backhaul link that interface is X2, and this channel condition information feedback mainly comprises two aspects: channel quality instruction and channel direction information. User in cooperation cell is carried out combination treatment by the central location channel condition information feedback above-mentioned according to backhaul link, and undesired signal user received is converted into useful signal, promotes the data throughput amount of user in cooperation cell. In auction process, the eNB in cooperation cell serves as central location in turn. Often carrying out taking turns auction, eNB plays the part of the role of central location in turn by community order.
Based on auction CoMP system multiband multi-win man method for allocating dynamic frequency spectrums schematic diagram as shown in Figure 2, seller's set is the mandate user with idle frequency band, and buyer's set is the unauthorized user wanting to be obtained idle frequency band by auction. Seller obtains temporary transient income by auction idle frequency band, and the idle frequency band that buyer obtains by auctioning improves the communication quality of self, it is to increase data throughput amount. In each idle frequency band auction process taken turns, first, central location collects seller's idle frequency band information, and broadcast auction information, auction information comprises number of frequency bands, frequency span, the average reserve price of idle frequency band and the geographical position information of seller. Meanwhile, central location, according to the geographical position information of seller and interference rule, arranges interference matrix. Then, buyer submits the bid information of frequency range to central location. Finally, central location, by greedy criterion and interference arranged in matrix, is selected winner, and is distributed frequency range to winner.
Wherein, if the spacing that interference rule is i-th unauthorized user and jth unauthorized user is less than 2RI, then there is interference, i-th row of corresponding interference matrix I in rice, the value of jth row is 1, i.e. I between i and jij=1; Otherwise, if the spacing of i-th unauthorized user and jth unauthorized user is more than or equal to 2RI, then there is not interference, I between i and j in riceij=0; Wherein RIFor the interference radius distance of unauthorized user in interference matrix I.
Based on auction CoMP system multiband multi-win man method for allocating dynamic frequency spectrums schema as shown in Figure 3, central location is according to the seller's band information collected, broadcast auction information, central location is according to the geographical position information of the seller collected simultaneously, arranging interference matrix, this process is the auction preparatory stage.
Unauthorized user i and buyer are to the C in idle frequency range set C to be vended1Frequency range is bid b by the mode of sealing bidiTo central location, namely each unauthorized user's information of bidding is separate and sealing. Central location collects all unauthorized user bids, obtains bid matrix B, B=[b1,b2,b3...bn]. Central location selects first round auction winner by greedy criterion and interference matrix, and the note the highest bid of epicycle is b1h, highest bidder is epicycle winner. Simultaneously by frequency range C1Distribute to this winner, record a1=1. If epicycle does not select winner, a1=0.
All eNB in central location integration and cooperation community, carry out combination treatment to winner, by the combination treatment technology of CoMP, the undesired signal of winner are changed into useful signal, improve the data throughput amount of winner. Subsequently, upgrade buyer and gather N and winner gathers W. The winner that epicycle auction is selected is added winner and gathers W by central location, gathers buyer simultaneously and rejects epicycle winner in N, and is rejected from idle frequency range set C by the frequency band distributed.
Central location carries out rotation according to cooperation cell order, starts the 2nd and takes turns auction. Central location collects bid information, and according to greedy criterion and interference matrix setting, it is resolved that epicycle winner. With reason, first central location according to the frequency range bid information collected, is found the unauthorized user that bid is the highest, is defined as candidate winner. Then, in order to ensure to obtain the communication quality of frequency band winner, if epicycle candidate winner and the first round winner occur interference, then epicycle candidate winner is given up, epicycle does not determine winner, i.e. a2=0, joined the winner given up simultaneously and gathered Naban; If epicycle candidate winner interference situation does not occur with first round winner, then determine this candidate winner's epicycle auction winner, i.e. a2=1. With reason, winner being carried out combination treatment, renewal buyer gathers N, idle frequency range set C and winner gathers W. Follow-up auction process takes turns the rule continuation of setting according to the 2nd, until buyer's set is empty set. This process is the auction stage.
Winner interference rule due to setting being rejected gathers NabanArrange, and to set N within the scope of cooperation cellabanIn element reselect random site;
The winner given up is gathered NabanAdd buyer and gather N, repeat auction phase process, until the winner given up gathers NabanFor empty set, obtain final distribution set A={a1,a2,a3...anAnd winner gather W, this process is the arrangement stage, and record arrange number of times T.
By the above-mentioned auction preparatory stage, auction stage, and arrangement stage, record distribution set A and winner gather W. Using the counting value of arrangement number of times T as the judgment condition of working cycle, if T=1, namely there is the winner given up in this working cycle, added working cycle, repeat the auction stage; Otherwise, namely there is not the unauthorized user of interference mutually, there is not the arrangement stage in T=0, working cycle terminates in working cycle. Finally, the system benefit value of this working cycle is obtained by calculation formula (1) and restricted condition formula (2), (3), (4).
ai�� { 0,1}, i=1,2,3...S (2)
Wherein, U is the required system benefit value calculated in each working cycle; bihIt is often take turns the highest bid in auction process; aiIt is the frequency allocation parameter often taking turns auction process, ai=1, then epicycle auction has decided winner, otherwise, ai=0, then winner is not selected in epicycle auction; N is the buyer's quantity in auction process; S is the number of frequency bands to be auctioned that seller has; pcFor the average reserve price of frequency range to be vended; biFor often taking turns the bid of buyer i in auction process. First restricted condition regulation is often taken turns in auction process, and winner can only obtain a single frequency range; 2nd restricted condition specifies that the buyer often taken turns in auction process bids the average reserve price of frequency range that must be greater than central location setting; 3rd restricted condition ensures that the user of interference mutually can not become winner in each circulation auction process simultaneously.
Claims (5)
1. the method for allocating dynamic frequency spectrums based on the CoMP system of auction, it is characterized in that, by based on the CoMP system model of auction mechanism and the method for allocating dynamic frequency spectrums of interference matrix design a kind of multiband multi-win man, the idle frequency band of CoMP system is effectively distributed, comprises the steps:
(1) auction the preparatory stage:
1) in CoMP system, it is assumed that the user having idle frequency band, for authorizing user, authorizes user can obtain temporary transient income by auction idle frequency band; Assuming that the user participating in auction bid is unauthorized user, unauthorized user holds idle frequency band by the mode of auction and improves communication quality; Suppose that each authorizes user to have an idle frequency band to be auctioned simultaneously, all treat auction frequency band without differences feature, and idle frequency band quantity to be auctioned supply exceed demand; Unauthorized user set is buyer, and buyer's set is N={1,2,3...n}; Authorizing user to be seller, seller's set is S={1,2,3 ... s}; Idle frequency band set to be vended is C={c1,c2,c3...cs;
2) there are three cooperation cell in CoMP system, have an eNB in each cooperation cell, the role of central location is played the part of in three eNB rotations; Central location is not only responsible for the associating transfer of user in cooperation cell, improves the data throughput amount of user, also serves as frequency spectrum middle man in auction process;
3) central location broadcast auction information, in order to ensure each communication quality taking turns winner in auction process, central location is regular with interference by the geographical position information of the unauthorized user collected, and setting interference matrix I, described interference matrix I are the matrixes that a capable n of n arranges;
(2) auction the stage:
1) unauthorized user i is to the C in idle frequency range set C to be vended1Frequency range sealing bid biTo central location, central location collects all unauthorized user bids, obtains bid matrix B, B=[b1,b2,b3...bn]; Central location selects first round auction winner by greedy criterion, and the note the highest bid of epicycle is b1h, highest bidder is epicycle winner; Simultaneously by frequency range C1Distribute to this winner, record a1=1; If not selecting winner, a1=0;
2) all eNB in central location integration and cooperation community, carry out combination treatment to winner, by the combination treatment technology of CoMP, the undesired signal of winner are changed into useful signal, improve the data throughput amount of winner; Subsequently, upgrade buyer and gather N and winner gathers W; Gather buyer and N rejects epicycle winner, gather winner and W counts epicycle winner, and the frequency band distributed is rejected from idle frequency range set C;
3) central location carries out rotation according to cooperation cell order, starts the 2nd and takes turns auction; Central location collects bid information, and according to greedy criterion and interference matrix setting, finds the unauthorized user that bid is the highest, be defined as candidate winner; If epicycle winner and the first round winner occur interference, then epicycle winner is given up, i.e. a2=0, joined the winner given up simultaneously and gathered Naban; With reason, winner being carried out combination treatment, renewal unauthorized user gathers N and winner gathers W; Repeat the step in auction stage, until it is empty set that buyer gathers N;
(3) arrangement stage:
1) winner interference rule due to setting being rejected gathers NabanArrange, and to set N within the scope of cooperation cellabanIn element reselect random site;
2) winner given up is gathered NabanRejoining buyer gathers in N, repeats the auction stage, until the winner given up gathers NabanFor empty set, obtain final distribution set A={a1,a2,a3...anAnd winner gather W; By the bottom line value U of formula (1) computing system:
Wherein bihIt is often take turns the highest bid in auction process; aiIt is the frequency allocation parameter often taking turns auction process, ai=1, then epicycle auction has decided winner, otherwise, ai=0, then winner is not selected in epicycle auction; N is the buyer's quantity in auction process.
2. the method for allocating dynamic frequency spectrums of the CoMP system based on auction according to claim 1, it is characterised in that, described interference rule is: if the spacing of i-th unauthorized user and jth unauthorized user is less than 2RI, then there is interference, i-th row of corresponding interference matrix I in rice, the value of jth row is 1, i.e. I between i and jij=1; Otherwise, if the spacing of i-th unauthorized user and jth unauthorized user is more than or equal to 2RI, then there is not interference, I between i and j in riceij=0; Wherein RIFor the interference radius distance of unauthorized user in interference matrix I.
3. the method for allocating dynamic frequency spectrums of CoMP system based on auction according to claim 1, it is characterised in that, described auction information comprises the idle frequency band quantity, the geography information of unauthorized user and the average reserve price p of idle frequency band to be vended that collectc��
4. the method for allocating dynamic frequency spectrums of the CoMP system based on auction according to claim 1, it is characterized in that, the step 2 in described auction stage) in, central location obtains the channel condition information feedback of other eNB in cooperation cell by the backhaul link that interface is X2, and described channel condition information feedback comprises two aspect channel quality instruction and channel direction information; User in cooperation cell is carried out combination treatment according to the channel condition information feedback of above-mentioned backhaul link by central location, and undesired signal user received is converted into useful signal, promotes the data throughput amount of user in cooperation cell.
5. the method for allocating dynamic frequency spectrums of the CoMP system based on auction according to claim 1, it is characterised in that, in the described arrangement stage, the U of the bottom line value of computing system also has following restricted condition:
ai�� { 0,1}, i=1,2,3...S (2)
Wherein, aiIt is the allocation of parameters of the frequency range i often taking turns auction process, ajIt it is the allocation of parameters of the frequency range j often taking turns auction process; S is the number of frequency bands to be auctioned that seller has; pcFor the average reserve price of frequency range to be vended; biFor often taking turns the bid of buyer i in auction process; Iij=1 expression i-th unauthorized user and jth unauthorized user disturb mutually; Restricted condition (2) regulation is often taken turns in auction process, and winner can only obtain a single frequency range; The buyer that restricted condition (3) regulation is often taken turns in auction process bids the average reserve price of frequency range that must be greater than central location setting; Restricted condition (4) is ensure that the user of interference mutually can not become winner in each circulation auction process simultaneously.
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| CN106211178A (en) * | 2016-07-12 | 2016-12-07 | 桂林电子科技大学 | A kind of spectrum auction bid optimization method of fractional order channeling |
| CN106412921A (en) * | 2016-11-03 | 2017-02-15 | 桂林电子科技大学 | Grouping frequency spectrum auction method of heterogeneous network including femtocell |
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| CN106211178A (en) * | 2016-07-12 | 2016-12-07 | 桂林电子科技大学 | A kind of spectrum auction bid optimization method of fractional order channeling |
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| CN106028346A (en) * | 2016-08-12 | 2016-10-12 | 桂林电子科技大学 | Small cell spectrum auction method |
| CN106028346B (en) * | 2016-08-12 | 2019-05-07 | 桂林电子科技大学 | A kind of spectrum auction method of cell |
| CN106412921A (en) * | 2016-11-03 | 2017-02-15 | 桂林电子科技大学 | Grouping frequency spectrum auction method of heterogeneous network including femtocell |
| CN106412921B (en) * | 2016-11-03 | 2019-11-01 | 桂林电子科技大学 | The grouping spectrum auction method of heterogeneous network comprising Home eNodeB |
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| WO2021016770A1 (en) * | 2019-07-26 | 2021-02-04 | Oppo广东移动通信有限公司 | Information processing method, network device and user equipment |
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