JP2012191372A - Radio communication system, base station device, and radio resource allocation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio resource allocation method capable of controlling QoS in accordance with the characteristics of data flows and improving fairness in Quality of Experience (QoE) among users using the same kind of application service.SOLUTION: A network including base station devices includes: a required QoE determination part for estimating required QoE to be requested by users; a data flow characteristic analysis part for analyzing the characteristics of data flows; a target Quality of Service (QoS) determination part for determining target QoS, based on the required QoE and the data flow characteristics; and a radio resource allocation part for determining radio resource amounts, based on the target QoS.

Description

  The present invention relates to a radio communication system, a base station apparatus, and a radio resource allocation method.

  Conventionally, in a wireless communication system, allocation of radio resources related to communication between a base station apparatus and a mobile station is performed as follows.

  In the technique described in Patent Document 1, radio resources are allocated based on radio quality such as desired signal received power (RSCP) or signal to noise plus interference power ratio (SINR). It is done.

  In the technique described in Patent Document 2, for example, radio resources are allocated based on quality of service (QoS) such as throughput, transmission delay, and transmission information error rate.

  Alternatively, there is a technique in which radio resources are allocated based on both radio quality and service quality.

  In the technique described in Patent Document 3, a Proportional Fairness algorithm (PF algorithm) is used to allocate radio resources so that service quality obtained by a plurality of terminals is as fair as possible.

  In the technique described in Patent Document 4, radio resources are allocated based on characteristics and radio quality required by an application.

  The term “radio resource” as used herein refers to various radio resources necessary for information transmission that are allocated to each data flow in radio communication, and the allocation can be arbitrarily changed for each data flow. The entire radio resource is divided by time, frequency, code, space, or a combination thereof, and the divided radio resource is allocated to each data flow.

The amount of radio resources allocated to each data flow is called a radio resource allocation amount. Examples of the radio resource allocation amount are as follows.
In time division multiple access (TDMA), the radio resource allocation may be the time allocated for each data flow per unit time (eg, 1 second).
In orthogonal frequency division multiple access (OFDMA), the radio resource allocation may be the number of subcarriers allocated for each data flow.
In code division multiple access (CDMA), the radio resource allocation may be the number of codes allocated for each data flow.
In space division multiple access, the radio resource allocation may be the number of antennas allocated for each data flow.

JP 2003-309875 A JP 2003-8635 A JP 2010-161598 A Japanese Patent Application Laid-Open Publication No. 2004-179693

  As described above, some conventional radio resource allocation methods allocate radio resources in consideration of quality. However, the conventional radio resource allocation method does not consider the amount of data transmitted and received. For example, in the technique described in Patent Document 4, the service quality of data flows belonging to the same type of application service is controlled regardless of the amount of data transmitted and received in the data flow. That is, if the application service to which the data flow belongs is different, different service qualities are provided based on the priority of the priority of the application service. However, if the application service to which the data flow belongs is the same type, the amount of transmitted / received data is large. Regardless, a certain quality of service is provided.

  If throughput is an example of service quality, the time required to complete transmission / reception of the data flow is determined by the ratio of the amount of transmitted / received data and the service quality. That is, for a certain service quality, when the amount of transmission / reception data of a certain data flow is large, the time required for completion becomes long.

  Generally, it can be said that the quality of service experienced by a user for a certain data flow, that is, the quality of experience (QoE, Quality of Experience) deteriorates as the time required for completion of transmission and reception becomes longer. Therefore, in the conventional radio resource allocation method that provides a constant service quality for each application service, the user experience quality may be significantly degraded.

  The present invention has been made in view of the above-described problems, and its purpose is to control the service quality according to the characteristics of the data flow, and to improve the user experience quality between users using the same kind of application service. An object of the present invention is to provide a radio communication system, a base station apparatus, and a radio resource allocation method that improve fairness.

  A radio communication system according to the present invention is a radio communication system including a plurality of mobile stations and a network including a base station apparatus that performs radio communication with the mobile stations, and the network uses each of the mobile stations. A required user experience quality determination unit for determining a required user experience quality estimated to be requested by a user, and a data flow characteristic analysis for analyzing a characteristic of a data flow transmitted / received by a communication service to be used by each of the mobile stations And a target service to be provided to the data flow based on the required user experience quality determined by the required user experience quality determination unit and the characteristics of the data flow determined by the data flow characteristic analysis unit A target service quality determination unit for determining quality, and the target service quality determined by the target service quality determination unit Scan based on the quality, and a radio resource allocation unit for determining a radio resource amount to be allocated to data of the data flow.

  The base station apparatus according to the present invention is a base station apparatus that performs radio communication with a plurality of mobile stations, and a required user experience that determines a required user experience quality estimated to be requested by a user using each of the mobile stations. A quality determination unit; a data flow characteristic analysis unit that analyzes characteristics of a data flow transmitted and received by a communication service to be used by each of the mobile stations; and the required user experience determined by the required user experience quality determination unit. A target service quality determination unit that determines a target service quality to be provided to the data flow based on the quality and the characteristics of the data flow determined by the data flow characteristic analysis unit; and the target service quality determination unit Based on the determined target quality of service, a radio resource that determines a radio resource amount to be allocated to the data of the data flow. And an over scan allocation unit

  The radio resource allocation method of the present invention is a radio resource allocation method used in a radio communication system including a plurality of mobile stations and a network including a base station apparatus that performs radio communication with the mobile stations, the mobile station Determining a required user experience quality estimated to be required by a user using each of the above, analyzing a characteristic of a data flow transmitted / received by a communication service to be used by each of the mobile stations, and the required A target for determining a target service quality to be provided to the data flow based on the required user experience quality determined by the user experience quality determination step and the characteristics of the data flow analyzed by the data flow property analysis step A service quality determination step and the target service determined by the service quality determination step. Based on the screw quality, and a radio resource allocation determining the radio resources to allocate to data of the data flow.

  In the present invention, in addition to determining the required user experience quality estimated to be requested by the user, the characteristics of the data flow to be transmitted and received are analyzed. Then, the target service quality is determined according to the required user experience quality and the characteristics of the data flow, and the radio resource amount is determined based on the target service quality. As described above, according to the present invention, the service quality can be controlled according to the characteristics of the data flow, and the fairness of the user experience quality among users using the same kind of application service can be improved.

It is a block diagram which shows the radio | wireless communications system which concerns on embodiment of this invention. It is a block diagram which shows a part of radio | wireless communications system which concerns on embodiment of this invention. It is a flowchart which shows the radio | wireless resource allocation method performed by the base station apparatus in the radio | wireless communications system which concerns on embodiment of this invention. 6 is an information flow diagram showing a downlink radio resource allocation method in the radio communication system according to the embodiment of the present invention. 6 is an information flow diagram showing an uplink radio resource allocation method in the radio communication system according to the embodiment of the present invention.

Hereinafter, various embodiments according to the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the radio communication system according to the embodiment includes an IP (Internet Protocol) network 100, a core network 200, and a radio access network 300. The core network 200 includes at least one (usually multiple) switching center 210. The radio access network 300 includes at least one (usually a plurality) base station apparatuses 310. Each switching center 210 is connected to the IP network 100 and is connected to a plurality of base station apparatuses 310. Base station apparatus 310 communicates wirelessly with mobile station 400 in the cell of the base station apparatus.

  Each mobile station 400 may be, for example, a mobile phone (UE (User Equipment) in UMTS LTE (Universal Mobile Telecommunications System Long Term Evolution)). Each base station apparatus 310 may be an eNB (evolved Node B) in UMTS LTE or an access point in WiMAX (Worldwide Interoperability for Microwave Access). Each switching center 210 may be a mobility management entity (MME) in UMTS LTE.

Next, base station apparatus 310, mobile station 400, and switching center 210 according to the embodiment will be described with reference to FIG.
Base station apparatus 310 according to the embodiment includes required user experience quality determination section 311, data flow characteristic analysis section 312, target service quality determination section 313, radio resource allocation section 314, transmission section 315, reception section 316 and feedback section 317. Is provided. The required user experience quality determination unit 311, the data flow characteristic analysis unit 312, the target service quality determination unit 313, the radio resource allocation unit 314 and the feedback unit 317 have a CPU (central processing unit) (not shown) of the base station apparatus 310 running a computer program. It is a functional block realized by executing and functioning according to the computer program.

  The transmission unit 315 is a transmission circuit for the base station apparatus 310 to perform radio transmission to the mobile station 400. The receiving unit 316 is a receiving circuit for the base station apparatus 310 to perform radio reception from the mobile station 400. The downlink communication scheme by the transmission unit 315 in this embodiment may be any one of time division multiple access, orthogonal frequency division multiple access, code division multiple access, and space division multiple access. Alternatively, an appropriate combination of two of them may be used. The uplink communication method received by the receiving unit 316 may be any one of time division multiple access, orthogonal frequency division multiple access, code division multiple access, and space division multiple access. Alternatively, an appropriate combination of two of them may be used.

  When communication is performed toward the mobile station 400 in the cell of the base station apparatus 310, the required user experience quality determination unit 311 and the data flow characteristic analysis unit 312 are supplied with the data flow characteristic information transmitted from the exchange 210. Is done. On the other hand, when communication is performed from the mobile station 400 in the cell of the base station apparatus 310, the required user experience quality determination unit 311 and the data flow characteristic analysis unit 312 are supplied with the data flow characteristic information transmitted from the mobile station 400. Is done. In any case, the data flow characteristic information indicates information related to the type of application service to which the transmitted / received data flow belongs and the amount of data transmitted / received. The information related to the type of application service may be information indicating the type of application service itself. When communication is performed toward the mobile station 400, the information related to the type of application service may be DSCP (DiffServ Code Point). When communication is performed from the mobile station 400, the information related to the type of application service may be a QCI (QoS Class Identifier). The “type of application service” includes, for example, VoIP (Voice over Internet Protocol), MMTel (Multimedia Telephony), browsing of voice and moving images, and browsing of still images or texts.

  Based on the data flow characteristic information, the required user experience quality determination unit 311 determines the required user experience quality (QoE) estimated to be requested by the user using the mobile station 400. As the “user experience quality”, for example, an average opinion score (MOS) defined in ITU-T recommendation P.800 as a subjective evaluation method of voice quality can be used. In addition, “User Experience Quality” regarding voice is ITU recommendation G.264. R value (R factor) defined in 107, ITU recommendation P.I. PESQ (Perceptual Evaluation of Speech Quality) defined in 862, ITU recommendation P.Q. A DMOS (Difference Mean Opinion Score) defined in 800 may be used. The “user experience quality” other than voice may be an index determined by the provider of the wireless access network 300 for example. The “required user experience quality” may be represented by a value such as a minimum allowable level or a range, for example. That is, the “required user experience quality” is an allowable level or an allowable range of strictness with respect to the experience quality that the user will request according to the type of communication service.

  The required user experience quality determination unit 311 may determine the required user experience quality based on the DSCP indicated in the data flow feature information received from the exchange 210, or the data flow feature information received from the mobile station 400. The required user experience quality may be determined based on the indicated QCI. Or the required user experience quality determination part 311 may determine a required user experience quality based on the information which shows the kind of application service itself shown by dataflow characteristic information. Alternatively, the required user experience quality determination unit 311 may determine the required user experience quality based on the data flow characteristic information in addition to the information related to the type of application service. An algorithm for determining the required user experience quality is prepared in advance by a provider of the wireless access network 300 based on, for example, an empirical rule.

  Based on the data flow characteristic information, the data flow characteristic analysis unit 312 analyzes the characteristic of the data flow transmitted / received by the communication service and outputs the characteristic of the data flow. The data flow characteristic output from the data flow characteristic analysis unit 312 is the amount of data transmitted / received in the data flow, the delay time allowed for the data flow, the urgency of the data content transmitted / received in the data flow, or a combination thereof. Although it is good, it is not limited to these.

  The required user experience quality output from the required user experience quality determination unit 311 and the data flow characteristics output from the data flow characteristic analysis unit 312 are supplied to the target service quality determination unit 313. Based on the required user experience quality and data flow characteristics, the target service quality determination unit 313 determines the target service quality of the uplink and downlink data flows transmitted and received between the base station apparatus 310 and the mobile station 400. “Quality of service” (QoS) includes, for example, throughput, transmission delay, fluctuation in packet arrival time interval, transmission information error rate, packet loss, or a combination thereof. The target service quality determined by the target service quality determination unit 313 is the throughput to be provided to the transmitted / received data flow, the delay time, the range of fluctuation of the packet arrival time interval, the transmission information error rate, the packet loss, or a combination thereof. It may be. The “target quality of service” may be expressed by a target value such as a minimum throughput and an allowable maximum transmission delay, or may be expressed by a target range. The algorithm by which the target service quality determination unit 313 determines the target service quality is prepared in advance by a provider of the radio access network 300 based on, for example, an empirical rule. For example, a function of required user experience quality and target service quality is prepared for each data flow characteristic. The target service quality determination unit 313 may further determine the target service quality in consideration of the wireless communication state between the base station apparatus 310 and the mobile station 400.

  Based on the target service quality output from the target service quality determination unit 313, the radio resource allocation unit 314 determines the radio resource amount to be allocated to the transmission unit 315 of the base station device 310 and the packet transmission unit 402 of the mobile station 400. Then, radio resources are allocated to transmitter 315 and mobile station 400 according to the determined radio resource amount. That is, in this embodiment, radio resource allocation section 314 determines the amount of radio resources to be allocated to downlink data flow data from base station apparatus 310 to mobile station 400 and designates radio resources to be allocated to this data flow. And determining the amount of radio resources to be allocated to uplink data flow data from the mobile station 400 to the base station apparatus 310 and designating radio resources to be allocated to this data flow. The radio resources allocated by the radio resource allocation unit 314 are obtained by dividing the entire radio resources that can be commonly used by the base station apparatus 310 and the mobile station 400 by time, frequency, code, space, or a combination thereof. It's okay.

  The transmission unit 315 transmits a packet using the radio resource allocated by the radio resource allocation unit 314. The reception unit 316 receives the packet transmitted from the transmission unit 402 of the mobile station 400.

  The feedback unit 317 measures the current service quality of the uplink data flow received by the receiving unit 316 and feeds back the measured current service quality information to the radio resource allocation unit 314. The information fed back by the feedback unit 317 is information related to the quality of service of the uplink data flow, for example, the throughput of the data flow, the delay time, the range of fluctuation of the packet arrival time interval, the transmission information error rate, and the packet loss. Although it is good, it is not limited to these.

  Based on feedback information from the feedback unit 317, the radio resource allocation unit 314 adjusts the amount of uplink radio resource allocated to the transmission unit 402 of the mobile station 400. For example, when the uplink current service quality indicated in the feedback information is lower than the uplink target service quality, the radio resource allocation unit 314 determines the uplink radio resource amount to be allocated to the transmission unit 402 of the mobile station 400. increase. When the uplink service quality indicated in the feedback information is higher than the uplink target service quality and the difference exceeds a certain threshold, the radio resource allocation unit 314 assigns the uplink service quality allocated to the transmission unit 402 of the mobile station 400 The amount of radio resources may be reduced. As described above, the radio resource allocation unit 314 provides the uplink current service quality provided to the mobile station 400 and the target service quality to be provided to the mobile station 400 determined by the target service quality determination unit 313. The amount of radio resources allocated to the transmission / reception data flow is changed based on the above.

  The mobile station 400 according to the embodiment includes a data flow information transmission unit (data flow information generation unit) 401, a transmission unit 402, a reception unit 403, and a feedback unit 404. The data flow information transmitting unit 401 and the feedback unit 404 are functional blocks realized by a CPU (not shown) of the mobile station 400 executing a computer program and functioning according to the computer program. The transmission unit 402 is a transmission circuit, and the reception unit 403 is a reception circuit.

  When communication is performed from the mobile station 400, the data flow information transmission unit 401 generates data flow characteristic information and transmits the data flow characteristic information to the base station apparatus 310. Specifically, the data flow characteristic information is transmitted by the transmission unit 402, received by the reception unit 316 of the base station apparatus 310, and delivered to the required user experience quality determination unit 311 and the data flow characteristic analysis unit 312. The data flow characteristic information transmitted by the data flow information transmission unit 401 includes at least information related to the type of application service to which the uplink data flow belongs and information related to the data amount. May be included.

  The reception unit 403 receives the packet transmitted from the transmission unit 315 of the base station apparatus 310. The transmission unit 402 transmits a packet using the uplink radio resource allocated by the radio resource allocation unit 314 of the base station apparatus 310. Information indicating the radio resource allocated by the radio resource allocation unit 314 is transmitted from the transmission unit 315 of the base station apparatus 310 to the reception unit 403, and the transmission unit 402 uses the radio resource according to this information.

  The feedback unit 404 measures the current service quality of the downlink data flow based on the packet received by the receiving unit 403, and feeds back the measured current service quality information to the radio resource allocation unit 314 of the base station apparatus 310. To do. Information on the service quality estimated by the feedback unit 404 is transmitted from the transmission unit 402 to the reception unit 316 of the base station apparatus 310 and further supplied to the radio resource allocation unit 314. The information fed back by the feedback unit 404 is information related to the quality of service of the downlink data flow, for example, the throughput of the data flow, the delay time, the fluctuation range of the packet arrival time interval, the transmission information error rate, and the packet loss. Although it is good, it is not limited to these.

  Based on feedback information from feedback section 404, radio resource allocation section 314 of base station apparatus 310 adjusts the amount of downlink radio resources allocated to transmission section 315 of base station apparatus 310. For example, when the downlink service quality indicated in the feedback information is lower than the downlink target service quality, the radio resource allocation unit 314 increases the downlink radio resource amount allocated to the transmission unit 315 of the base station apparatus 310. Let When the downlink service quality indicated in the feedback information is higher than the downlink target service quality and the difference exceeds a certain threshold, the radio resource assignment unit 314 assigns the downlink to the transmission unit 315 of the base station apparatus 310. The amount of radio resources may be reduced. In this way, the radio resource allocation unit 314 provides the downlink current service quality provided to the mobile station 400 and the target service quality to be provided to the mobile station 400 determined by the target service quality determination unit 313. The amount of radio resources allocated to the transmission / reception data flow is changed based on the above.

  The switching center 210 according to the embodiment includes a data flow information transmission unit (data flow information generation unit) 211. When communication is performed toward the mobile station 400 in the cell of the base station apparatus 310, the data flow information transmission unit 211 generates data flow characteristic information and transmits the data flow characteristic information to the base station apparatus 310. The data flow characteristic information transmitted by the data flow information transmission unit 211 includes at least information related to the type of application service to which the downlink data flow belongs and information related to the data amount. May be included.

  A radio resource allocation method in the radio communication system according to this embodiment will be described. FIG. 3 is a flowchart showing a radio resource allocation method for a plurality of mobile stations 400, which is executed by base station apparatus 310 according to the embodiment. 4 is an information flow diagram showing a radio resource allocation method when it is assumed that a data flow is transmitted from the IP network 100 to one mobile station 400 through one base station apparatus 310. FIG. 3 is an information flow diagram illustrating a radio resource allocation method when it is assumed that a data flow is transmitted to the IP network 100 through one base station 310. FIG. In the following description, it is assumed that a data flow is transmitted from the IP network 100 to one mobile station 400 through one base station apparatus 310, and a data flow is transmitted from one mobile station 400 to the mobile station 400 through the base station apparatus 310. .

  FIG. 3 is a flowchart common to uplink and downlink data flows, and the processing of FIG. 4 starts when a data flow originating in the IP network 100 is transmitted to the mobile station 400. The process in FIG. 5 starts when a data flow originating from the mobile station 400 is transmitted to the IP network 100.

  First, a radio resource allocation method regarding downlink data flow will be described. As shown in FIGS. 3 and 4, when a data flow occurs (steps S001 and S101), the data flow information transmission unit 211 of the switching center 210 generates data flow characteristic information relating to the generated data flow (step S102). ), To the required user experience quality determination unit 311 and the data flow characteristic analysis unit 312 of the base station apparatus 310 (step S103).

  Upon receiving the data flow characteristic information, the base station apparatus 310 allocates radio resources to the downlink data flow based on the data flow characteristic information (step S104 in FIG. 4). More specifically, based on the data flow characteristic information received from the data flow information transmission unit 211, the data flow characteristic analysis unit 312 of the base station apparatus 310 analyzes the data flow characteristic of the downlink data flow (see FIG. 3 step S002). Also, the required user experience quality determination unit 311 of the base station apparatus 310 determines the required user experience quality for the downlink data flow using the data flow feature information received from the data flow information transmission unit 211 (FIG. 3). Step S003). The order of step S002 and step S003 may be reversed.

  Thereafter, based on the required user experience quality and data flow characteristics, the target service quality determination unit 313 of the base station apparatus 310 determines the target service quality that the base station apparatus 310 should provide for the downlink data flow (step S004). ). Based on the determination of the target service quality by the target service quality determination unit 313, the radio resource allocation unit 314 of the base station apparatus 310 determines the radio resource amount to be allocated to the downlink data flow, and the radio resource allocated to this data flow Is designated, and the designated radio resource is instructed to the transmission unit 315 (step S005). The transmission unit 315 determines whether there is data to be transmitted that belongs to the data flow (step S006). When there is data to be transmitted, the transmission unit 315 transmits data using the allocated radio resource designated by the radio resource allocation unit 314. If there is no data to be transmitted, the communication is terminated (step S009).

  Data transmitted from the transmission unit 315 is received by the reception unit 403 of the mobile station 400. The feedback unit 404 of the mobile station 400 analyzes the service quality of the received data and feeds back information related to the service quality to the base station device 300 (step S105 in FIG. 4). Based on the feedback information transmitted from the feedback unit 404, the radio resource allocation unit 314 determines whether the target service quality has been achieved for the downlink data flow (step S007 in FIG. 3). If the target service quality is achieved, the process returns to step S006 again. If the target service quality is not achieved, the allocated amount of radio resources is increased (step S008), and the process returns to step S006 again. To achieve the target service quality.

  Next, a radio resource allocation method regarding uplink data flow will be described. As shown in FIG. 3 and FIG. 5, when a data flow occurs (step S001, step S201), the data flow information transmission unit 401 of the mobile station 400 generates data flow characteristic information regarding the generated data flow (step S202). ) To the base station apparatus 310 (step S203).

  Upon receiving the data flow characteristic information, the base station apparatus 310 allocates radio resources to the uplink data flow based on the data flow characteristic information (step S204 in FIG. 5). More specifically, based on the data flow characteristic information received from the data flow information transmission unit 401, the data flow characteristic analysis unit 312 of the base station apparatus 310 analyzes the data flow characteristic of the uplink data flow (see FIG. 3 step S002). Further, the required user experience quality determination unit 311 of the base station apparatus 310 uses the data flow feature information received from the data flow information transmission unit 401 to determine the required user experience quality for the uplink data flow (FIG. 3). Step S003). The order of step S002 and step S003 may be reversed.

  After that, based on the required user experience quality and data flow characteristics, the target service quality determination unit 313 of the base station apparatus 310 determines the target service quality that the base station apparatus 310 should provide for the uplink data flow (step S004). ). Based on the determination of the target service quality by the target service quality determination unit 313, the radio resource allocation unit 314 of the base station apparatus 310 determines the radio resource amount to be allocated to the uplink data flow, and the radio resource allocated to this data flow And designates the designated radio resource to the mobile station 400 (step S005, step S205 in FIG. 5). The transmission unit 402 of the mobile station 400 transmits data using the allocated radio resource specified by the radio resource allocation unit 314. Data transmitted from the transmission unit 402 is received by the reception unit 316 of the base station apparatus 310. The feedback unit 317 of the base station apparatus 310 analyzes the service quality of the received data, and feeds back information related to the service quality to the radio resource allocation unit 314 of the base station apparatus 300 (step S206 in FIG. 5).

  Further, the receiving unit 316 of the base station apparatus 310 determines whether or not there is received data belonging to the data flow (step S006). If the received data does not exist, the communication is terminated (step S009). If the received data exists, the radio resource allocation unit 314 determines whether the target service quality has been achieved for the uplink data flow based on the feedback information from the feedback unit 317 (step of FIG. 3). S007). If the target service quality is achieved, the process returns to step S006 again. If the target service quality is not achieved, the allocated amount of radio resources is increased (step S008), and the process returns to step S006 again. To achieve the target service quality.

  As described above, in this embodiment, in addition to determining the required user experience quality estimated to be requested by the user, the characteristics of the data flow to be transmitted and received are analyzed. Then, the target service quality is determined according to the required user experience quality and the characteristics of the data flow, and the radio resource amount is determined based on the target service quality. Thus, the service quality can be controlled according to the characteristics of the data flow, and the fairness of the user experience quality among users who use the same type of application service can be improved.

  Further, the radio resource allocation unit 314 changes the radio resource amount based on the current service quality supplied from the feedback unit 317 or the feedback unit 404 and the target service quality determined by the target service quality determination unit 313. The amount of radio resources allocated to the data flow can be optimized. For example, when the target service quality is not achieved, the user experience quality is improved by correcting the radio resource amount based on the feedback information from the feedback unit 317 or 404.

  Although the invention has been illustrated and described in detail with reference to preferred embodiments thereof, various changes in form and detail may be made within the scope of the invention as set forth in the claims. Will be understood by those skilled in the art. Applicants intend that such changes, substitutions, and modifications are also within the scope of the present invention.

  For example, in the above embodiment, the radio resource allocation unit 314 determines the radio resource amount for both uplink and downlink data flows. However, the radio resource allocating unit 314 may determine the radio resource amount only for one of the uplink and downlink data flows.

  In the above embodiment, the radio resource allocation unit 314 determines the radio resource amount to be allocated to the data flow and specifies the radio resource to be allocated to this data flow according to the determined radio resource amount. However, as another embodiment, the radio resource allocation unit 314 may only determine the radio resource amount. Actual allocation of radio resources to downlink data flows may be performed by the transmission unit 315 of the base station apparatus 310 or other elements according to the radio resource amount determined by the radio resource allocation unit 314. The actual allocation of radio resources to the uplink data flow depends on the radio resource amount determined by the radio resource allocation unit 314, or the transmission unit 402 of the mobile station 400 or other elements in the base station device 310 or the mobile station 400. May do.

  Required user experience quality determination unit 311, data flow characteristic analysis unit 312, target service quality determination unit 313, radio resource allocation unit 314, and part of feedback unit 317 provided in base station apparatus 310 in the above embodiment or All may be provided in a separate device physically separated from the base station device 310.

  In the base station apparatus 310 and the mobile station 400, each function executed by the CPU may be executed by hardware instead of the CPU. For example, an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), etc. It may be executed by a programmable logic device.

  The above modifications may be combined as long as there is no contradiction.

DESCRIPTION OF SYMBOLS 100 ... IP network, 200 ... Core network, 210 ... Switching office, 211, 401 ... Data flow information transmission part (data flow information generation part), 300 ... Wireless access network, 310 ... Base station apparatus, 311 ... Required user quality of experience Determination unit, 312 ... data flow characteristic analysis unit, 313 ... target service quality determination unit, 314 ... radio resource allocation unit, 315, 402 ... transmission unit, 316, 403 ... reception unit, 317, 404 ... feedback unit, 400 ... movement Bureau.

Claims (8)

A wireless communication system comprising a plurality of mobile stations and a network comprising a base station device that performs wireless communication with the mobile station,
The network is
A required user experience quality determining unit for determining a required user experience quality estimated to be requested by a user using each of the mobile stations;
A data flow characteristic analysis unit that analyzes characteristics of a data flow transmitted and received in a communication service to be used by each of the mobile stations;
Based on the required user experience quality determined by the required user experience quality determination section and the characteristics of the data flow determined by the data flow characteristic analysis section, a target service quality to be provided to the data flow is determined. A target service quality determination unit to
A radio communication system comprising: a radio resource allocation unit that determines a radio resource amount to be allocated to data of the data flow based on the target service quality determined by the target service quality determination unit. The network includes an external network and an exchange that transmits and receives data to and from the base station device,
The switching center includes a data flow information generation unit that generates information related to the type of application service to which the data flow transmitted to the mobile station belongs and data flow characteristic information indicating the amount of data transmitted to the mobile station. ,
The required user experience quality determination unit determines the required user experience quality based on the data flow feature information,
The wireless communication system according to claim 1, wherein the data flow characteristic analysis unit analyzes the characteristic of the data flow based on the data flow characteristic information. The mobile station includes a data flow information generating unit that generates data flow characteristic information indicating information related to a type of application service to which a data flow transmitted from the mobile station belongs and data amount transmitted from the mobile station. ,
The required user experience quality determination unit determines the required user experience quality based on the data flow feature information,
The wireless communication system according to claim 1, wherein the data flow characteristic analysis unit analyzes the characteristic of the data flow based on the data flow characteristic information. The radio resource allocation unit
The amount of radio resources allocated to the data of the data flow is changed based on the current service quality provided to the mobile station and the target service quality determined by the target service quality determination unit. The wireless communication system according to any one of claims 1 to 3. A base station apparatus that performs radio communication with a plurality of mobile stations,
A required user experience quality determining unit for determining a required user experience quality estimated to be requested by a user using each of the mobile stations;
A data flow characteristic analysis unit that analyzes characteristics of a data flow transmitted and received in a communication service to be used by each of the mobile stations;
Based on the required user experience quality determined by the required user experience quality determination unit and the characteristics of the data flow determined by the data flow characteristic analysis unit, a target service quality to be provided to the data flow is determined. A target service quality determination unit to
A base station apparatus comprising: a radio resource allocation unit that determines a radio resource amount to be allocated to data of the data flow based on the target service quality determined by the target service quality determination unit. The radio resource allocation unit
The amount of radio resources allocated to the data of the data flow is changed based on the current service quality provided to the mobile station and the target service quality determined by the target service quality determination unit. The base station apparatus according to claim 5. A radio resource allocation method used in a radio communication system including a plurality of mobile stations and a network including a base station apparatus that performs radio communication with the mobile station,
Determining a required user experience quality estimated to be required by a user using each of the mobile stations;
Analyzing the characteristics of the data flow transmitted and received by the communication service that each of the mobile stations intends to use;
Based on the required user experience quality determined by the required user experience quality determination step and the characteristics of the data flow analyzed by the data flow characteristic analysis step, a target service quality to be provided to the data flow is determined. A target quality of service determination step,
A radio resource allocation method comprising: a radio resource allocation step that determines a radio resource amount to be allocated to data of the data flow based on the target service quality determined in the service quality determination step. The method further comprises a step of changing a radio resource amount allocated to data of the data flow based on a current service quality provided to the mobile station and the target service quality determined by the target service quality determination unit. The radio | wireless resource allocation method of Claim 7.

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