WO2019000778A1 - Procédé et appareil de construction de cellule virtuelle - Google Patents

Procédé et appareil de construction de cellule virtuelle Download PDF

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Publication number
WO2019000778A1
WO2019000778A1 PCT/CN2017/109854 CN2017109854W WO2019000778A1 WO 2019000778 A1 WO2019000778 A1 WO 2019000778A1 CN 2017109854 W CN2017109854 W CN 2017109854W WO 2019000778 A1 WO2019000778 A1 WO 2019000778A1
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Prior art keywords
user
access point
determining
access points
predicted
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PCT/CN2017/109854
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English (en)
Chinese (zh)
Inventor
曾捷
粟欣
李菁菁
刘蓓
许希斌
赵明
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清华大学
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Publication of WO2019000778A1 publication Critical patent/WO2019000778A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/13—Cell handover without a predetermined boundary, e.g. virtual cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H04W36/008357—Determination of target cell based on access point [AP] properties, e.g. AP service capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services

Definitions

  • the present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for constructing a virtual cell.
  • the user-centric virtual cell will eliminate the cell edge and break the concept of the traditional "cell”.
  • a user may select a plurality of access points around the user to form a set of service antennas according to certain criteria, and the antennas in the set jointly provide services for users in the "center”.
  • the access point in the user-centered virtual cell is also updated as the user moves, so that some of the original virtual cells do not have An access point that can serve the user will join the virtual cell, and some access points in the original virtual cell that no longer satisfy the user service condition will be removed from the virtual cell, as shown in FIG.
  • the access point connected to the user will switch frequently, which will cause the user's current service to generate an interrupt delay, thereby affecting the user experience.
  • the embodiment of the present application provides a method for constructing a virtual cell, which is used to solve the problem that when an access state connected to a user is frequently switched, causing the current service interruption of the user and affecting the user experience when the user is in a mobile state in the prior art. .
  • the embodiment of the present application further provides a device for constructing a virtual cell, which is used to solve the problem that when the user is in a mobile state, the access point connected to the user will be frequently switched, causing the current service interruption of the user and affecting the user experience. problem.
  • a method for constructing a virtual cell comprising:
  • a virtual cell construction apparatus includes:
  • a first determining unit configured to determine, in a next preset time interval, each first access point in the network that can establish a communication connection with the user
  • a second determining unit configured to determine a quality of service of each of the first access points, and a preference preference of the user for each of the first access points, where the selection preference is used to indicate that a degree of inclination of the user to access the first access point in a next preset time interval;
  • a third determining unit configured to determine, according to the quality of service of each of the first access points and the user's preference for each of the first access points, that the user is connected within the preset time interval The priority of each of the first access points;
  • a fourth determining unit configured to determine a target access point according to a priority of each of the first access points, and join the target access point to a virtual cell centered on the user.
  • the selection is The propensity is used to indicate the degree of tendency of the user to select the first access point in the next preset time interval, and then according to the quality of service of each first access point and the user's preference for each first access point. Determining the priority of the user accessing each of the first access points in a preset time interval, and finally determining the target access point according to the priority of each first access point, and adding the target access point to the user-centered Virtual cell.
  • each target access point in the user-centered virtual cell is determined according to the priority, the switching of the access point connected to the user can be reduced, thereby reducing the connection.
  • the interrupt delay caused by the in-point switch can improve the user experience.
  • FIG. 1 is a schematic diagram of a user-centered virtual cell in the prior art
  • FIG. 2 is a schematic flowchart of implementing a method for constructing a virtual cell according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a device for constructing a virtual cell according to an embodiment of the present disclosure.
  • the embodiment of the present application provides a method for constructing a virtual cell.
  • the execution body of the method may be a control plane, such as a macro base station, or any device that implements the method provided by the present application.
  • the implementation body of the method is a control plane, and the implementation manner of the method is described in detail. It can be understood that the execution body of the method is only an exemplary description of the control surface, and should not be understood as Method definition.
  • FIG. 2a The schematic diagram of the implementation process of the method is shown in Figure 2a, including:
  • Step 11 Determine, in a next preset time interval, each first access point in the network that can establish a communication connection with the user;
  • the next preset time interval may be the next time interval of the user relative to the current time interval, and the size of the preset time interval is often greater than the time taken to implement the method provided by the present application, and the specific The value can be determined according to the actual situation, for example, it can be determined according to information such as the current moving speed of the user.
  • the user in the embodiment of the present application may be a mobile terminal, such as a smart phone, a wearable device, or the like, which can implement a wireless communication service.
  • the access point in the embodiment of the present application may be an access point that can establish a communication connection with the user, so that the user can implement a wireless communication service, such as a wireless access point, a small base station, or the like.
  • the connected first access point may first receive the first message of the user and the second message of each access point in the network; and then may be located according to the user included in the first message in the next preset time interval.
  • the predicted location, the coverage of each first access point included in each second message, and the signal received power are used to determine a first access point in the network that can establish a communication connection with the user in the next preset time interval.
  • the first access point that can establish a communication connection with the user in the network on the one hand, according to each predicted location included in the first message, the coverage of each first access point included in each second message, To determine whether each predicted position is within the coverage of an access point, and if it is determined that the user is within a next preset time interval and a certain predicted position is within the coverage of an access point, then it may be determined
  • the first access point corresponding to the coverage area is an access point that can be connected to the user; on the other hand, the received power of the signal included in the second message may be used to determine whether the received power of the signal is greater than a preset value, if If the received power of the signal is greater than a preset value, it may be determined that the access point corresponding to the received power of the signal is a first access point capable of establishing a communication connection with the user.
  • Step 12 Determine the service quality of each first access point and the user's preference for each first access point, where the preference is selected to indicate that the user selects the first access in the next preset time interval. The degree of inclination of the entry point;
  • the service quality of each first access point that can establish a communication connection with the user may be separately determined according to the transmit power and the load of the access point included in the second message, which may be specifically determined by a formula. To determine, where P j is the transmit power of the first access point j and L j is the load of the first access point j.
  • the predicted speed when the predicted position is located, the first predicted path when the user is at each preset position, and the user are each The probability at the predicted location, and the coverage of each of the first access points included in each second message are determined.
  • the specific process of determining the user's preference for the first access point j is described in detail below by taking the predicted location m that the user may be located in the next preset time interval, and the first access point j as an example.
  • First Determining, according to the first predicted path s m included in the first message and the coverage of the first access point j included in the second message, the second predicted path s m included in the coverage included in the first predicted path , j ; then determining the dwell time t m,j of the user within the coverage of the first access point j according to the second predicted path s m,j and the predicted speed v m of the user at the predicted position m; finally, the predicted location m, the predicted probability of the user P m at position m and a residence time t m, j, to determine the predisposition of the user selects the first access point j.
  • each predicted position that the user may be located in the next preset time interval the predicted speed at each predicted position, each first predicted path including each predicted position, and the user in each prediction
  • the probability at the location can be obtained by the user based on his own historical location information, historical action trajectory, current action trajectory, and the flow of people in the area.
  • determining the dwell time of the user within the coverage specifically by using a formula Determining, wherein the second predicted path s m,j is a portion of the first expected path s m within the coverage of the first access point j when the user is at the predicted position m, and v m is the user at the predicted position m
  • the speed of prediction Since it is possible to determine the dwell time of the user within the coverage of each first access point in the next preset time interval, when determining the access point in the virtual cell, it is possible to consider the access point with a long dwell time. The priority is added to the virtual cell, so that the problem that the user's current service interruption is caused by frequent switching of the access point connected to the user when the user moves.
  • the user may determine the first access point j according to the set M of the predicted positions that the user may be located in the next preset time interval, the probability of the user at the predicted position m(m ⁇ M), and the dwell time.
  • M is a set of predicted locations that the user may be located in the next preset time interval
  • m ⁇ M P m is the probability that the user is at the predicted position m in the next preset time interval
  • d m,j is The distance between the user and the first access point j when the user is located at the predicted position m in the next preset time interval
  • t m,j is the resident of the user within the coverage of the first access point j as described above. Leave time.
  • Step 13 Determine, according to the quality of service of each first access point and the user's preference for each first access point, the priority of the user accessing each first access point in the preset time interval;
  • the method for determining the priority of the user accessing the first access point j is described along with the first access point j as an example.
  • Step 14 Determine the target access point according to the priority of each first access point, and add the target access point to the virtual cell with the user as the center.
  • the second access point in the embodiment of the present application is a first access point that can establish a communication connection with the user, in order to facilitate the user to accurately determine the experience rate after establishing a communication connection with each of the first access points.
  • the priority of each target access point is often higher than the priority of the third access point, where the third connection
  • the ingress point is an access point other than the target access point in the second access point.
  • the target access points whose sum of the experience rates is greater than or equal to the preset experience rate determining the target access points according to the priority from highest to lowest, wherein the target access points The number of points is the minimum amount that satisfies the sum of the experience rates greater than or equal to the preset experience rate.
  • the following operations may be performed on the first access point in order from the highest to the lowest priority: first, determine whether the user can establish a communication connection with the first access point; if it is determined that the user can connect with the first access Determining a communication connection, determining a first experience rate after the user establishes a communication connection with the first access point; and then determining whether the determined sum of the first experience rates is greater than or equal to The preset experience rate is determined. If it is determined that the sum of the experience rates is greater than or equal to the preset experience rate, each first access point that has determined the first experience rate is determined as the target access point.
  • the number n of the first access points can also be determined.
  • the specific implementation process of determining the target access point from each of the second access points is described in detail:
  • Step i starting from the first access point j 1 , determining whether the user can establish a communication connection with the first access point j 1 ;
  • Step ii if it is determined that the user can establish a communication connection with the first access point j 1 , step iii is performed, if it is determined that the user cannot establish a communication connection with the first access point j 1 , step v is performed;
  • Step iii the user determines the first access point j 1 rate after the establishment of a communication connection experience R 1 is greater than or equal to a preset speed experience R req;
  • Step iv if it is determined that R 1 ⁇ R req , the first access point j 1 is added to the user-centered virtual cell, if it is determined that R 1 ⁇ R req , step v is performed;
  • Step v determining whether the user can establish a communication connection with the first access point j 2 ;
  • Step vi if it is determined that the user can establish a communication connection with the first access point j 2 , step vii is performed, if it is determined that the user cannot establish a communication connection with the first access point j 2 , step viii is performed;
  • Step vii determining whether the sum of the experience rates R 2 and R 1 after the user establishes a communication connection with the first access point j 2 is greater than or equal to the preset experience rate R req ;
  • Step viiii if it is determined that R 1 + R 2 ⁇ R req , the first access points j 1 and j 2 are added to the user-centered virtual cell, and if R 1 + R 2 ⁇ R req is determined , execution is performed Step ix;
  • Step ix determining whether the user can establish a communication connection with the first access point j 3 ;
  • the target access points whose sum of the experience rates are greater than or equal to the preset experience rate can be determined from the second access point, and finally, the target access points are added to the user-centered virtual cell. . It should be noted that, in the present application, in order to avoid a large amount of computation, it is preferable to terminate each target access point after determining that the sum of the experience rates is greater than or equal to the preset experience rate from the second access point. The judgment operation of the access point other than the target access point in the array J.
  • the determined target access points may be added to the user-centered virtual cell before the next preset time interval, so that the user's location movement does not cause connection in the next preset time interval.
  • the switching of the access point can further avoid the problem that the user's current service interruption affects the user experience.
  • the selection is The propensity is used to indicate the degree of tendency of the user to select the first access point in the next preset time interval, and then according to the quality of service of each first access point and the user's preference for each first access point. Determining the priority of the user accessing each of the first access points in a preset time interval, and finally determining the target access point according to the priority of each first access point, and adding the target access point to the user-centered Virtual cell.
  • each target access point in the user-centered virtual cell is determined according to the priority, the switching of the access point connected to the user can be reduced, thereby reducing the connection.
  • the interrupt delay caused by the in-point switch can improve the user experience.
  • the embodiment of the present application further provides a virtual cell construction apparatus. As shown in Figure 3, it includes the following functional units:
  • the first determining unit 21 is configured to determine that the network can be used in the next preset time interval.
  • the first access point of the communication connection is established by the user;
  • a second determining unit 22 configured to determine a quality of service of each of the first access points, and a preference preference of the user for each of the first access points, where the selection preference is used to indicate that Describe the degree of tendency of the user to access the first access point in the next preset time interval;
  • a third determining unit 23 configured to determine, according to the quality of service of each of the first access points and the user's preference for each of the first access points, that the user is within the preset time interval Accessing the priority of each of the first access points;
  • the fourth determining unit 24 is configured to determine, according to priorities of the first access points, a target access point, and join the target access point to a virtual cell centered on the user.
  • the fourth determining unit 24 is specifically configured to:
  • each of the target access points whose sum of experience rates is greater than or equal to a preset experience rate, wherein the second access point is the first one capable of establishing a communication connection with the user An access point; each of the target access points has a higher priority than a third access point, and the third access point is other than the target access point of the second access point.
  • Access Point Determining, in the second access point, each of the target access points whose sum of experience rates is greater than or equal to a preset experience rate, wherein the second access point is the first one capable of establishing a communication connection with the user An access point; each of the target access points has a higher priority than a third access point, and the third access point is other than the target access point of the second access point.
  • the fourth determining unit 24 is specifically configured to:
  • Each of the target access points is determined according to a priority from high to low, and the number of the target access points is a minimum number that satisfies the sum of the experience rates greater than or equal to the preset experience rate.
  • the performing in descending order of priority, sequentially performing the following operations on the first access point:
  • each of the first access points that have determined the first experience rate is determined as the target access point.
  • the first determining unit 21 is specifically configured to:
  • the second determining unit 22 is specifically configured to:
  • the quality of service is through the formula Determining, wherein P j is the transmit power of the first access point j, and L j is the load of the first access point j.
  • the second determining unit 22 is further configured to:
  • each of the first predicted paths is included in each of the coverage areas Second predicted path;
  • the dwell time is through a formula Determining, wherein s m,j is a second predicted path, and the second predicted path s m,j is a portion of the first predicted path s m within the coverage of the first access point j,
  • the first predicted path s m is a first predicted path of the user at the predicted position m, and v m is a predicted speed of the user at the predicted position m;
  • the selection tendency is through a formula Determining, wherein M is a set of each of the predicted positions of the user in the preset time interval, m ⁇ M , P m is a probability that the user is located at the predicted position m, d m,j a distance between the user and the first access point j when the user is located at the predicted position m, t m,j is a dwell time of the user within the coverage of the first access point j .
  • the selection is The propensity is used to indicate the degree of tendency of the user to select the first access point in the next preset time interval, and then according to the quality of service of each first access point and the user's preference for each first access point. Determining the priority of the user accessing each of the first access points in a preset time interval, and finally determining the target access point according to the priority of each first access point, and adding the target access point to the user-centered Virtual cell.
  • each target access point in the user-centered virtual cell is determined according to the priority, the switching of the access point connected to the user can be reduced, thereby reducing the connection.
  • the interrupt delay caused by the in-point switch can improve the user experience.
  • embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the present application can adopt an entirely hardware embodiment, complete software implementation. For example, or in combination with an embodiment of software and hardware aspects.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
  • processors CPUs
  • input/output interfaces network interfaces
  • memory volatile and non-volatile memory
  • the memory may include non-persistent memory, random access memory (RAM), and/or non-volatile memory in a computer readable medium, such as read only memory (ROM) or flash memory (flash) RAM). Memory is an example of a computer readable medium.
  • RAM random access memory
  • ROM read only memory
  • flash flash memory
  • Computer readable media includes both permanent and non-persistent, removable and non-removable media.
  • Information storage can be implemented by any method or technology.
  • the information can be computer readable instructions, data structures, modules of programs, or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transportable media can be used to store information that can be accessed by a computing device.
  • computer readable media does not include temporary storage of computer readable media, such as modulated data signals and carrier waves.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de construction d'une cellule virtuelle, utilisés pour résoudre le problème de l'état de la technique, lorsqu'un utilisateur est dans un état de mouvement, un point d'accès connecté à l'utilisateur commutant fréquemment et amenant ainsi le service actuel de l'utilisateur à être perturbé et l'expérience d'utilisateur à être affectée, ledit procédé comprenant : déterminer tous les premiers points d'accès dans un réseau qui sont capables d'établir une connexion de communication avec un utilisateur pendant un intervalle de temps prédéfini ultérieur; déterminer la qualité de service de chacun desdits premiers points d'accès, et la tendance dudit utilisateur à sélectionner chacun des premiers points d'accès; en fonction de la qualité de service de chacun des premiers points d'accès et de la tendance de l'utilisateur à sélectionner chacun des premiers points d'accès, à déterminer la priorité de l'utilisateur pour accéder à chaque premier point d'accès dans ledit intervalle de temps prédéfini; en fonction de la priorité de chacun des premiers points d'accès, à déterminer un point d'accès cible et à ajouter ledit point d'accès cible à la cellule virtuelle centrée sur l'utilisateur.
PCT/CN2017/109854 2017-06-30 2017-11-08 Procédé et appareil de construction de cellule virtuelle WO2019000778A1 (fr)

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CN106304267A (zh) * 2015-06-03 2017-01-04 上海无线通信研究中心 一种以用户为中心的虚拟小区选择方法
CN105530677A (zh) * 2015-12-04 2016-04-27 清华大学 一种基于用户定位的超密集组网虚拟小区切换方法

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