Source: https://patents.google.com/patent/WO2013089057A1/en
Timestamp: 2019-11-12 16:57:08
Document Index: 437042919

Matched Legal Cases: ['art 34', 'Application No. 2011', 'art 3', 'art 4', 'art 20', 'art 33', 'art 34']

WO2013089057A1 - Wireless parameter control system, wireless parameter control device, wireless base station, wireless terminals, wireless parameter control method and program - Google Patents
Wireless parameter control system, wireless parameter control device, wireless base station, wireless terminals, wireless parameter control method and program Download PDF
WO2013089057A1
WO2013089057A1 PCT/JP2012/081922 JP2012081922W WO2013089057A1 WO 2013089057 A1 WO2013089057 A1 WO 2013089057A1 JP 2012081922 W JP2012081922 W JP 2012081922W WO 2013089057 A1 WO2013089057 A1 WO 2013089057A1
PCT/JP2012/081922
航生 小林
2012-12-10 Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
2013-06-20 Publication of WO2013089057A1 publication Critical patent/WO2013089057A1/en
230000000576 supplementary Effects 0 description 49
The present invention is a wireless parameter control system that determines wireless parameters for wireless cells by using wireless terminal measurement information from measurements made by wireless terminals. The wireless parameter control system comprises: a wireless terminal movement assessment means that determines whether the magnitude of movement of wireless terminals is within a prescribed range; and a wireless parameter determination means that distinguishes between wireless terminal measurement information reported by wireless terminals for which the magnitude of movement is within the prescribed range, and wireless terminal measurement information reported by wireless terminals for which the magnitude of movement is outside of the prescribed range, and that determines wireless parameters for the wireless cells.
Radio parameter control system, radio parameter control apparatus, radio base station, radio terminal, radio parameter control method and program
The present invention relates to a radio parameter control system, a radio parameter control device, a radio base station, a radio terminal, a radio parameter control method, and a program.
In a cellular radio communication network represented by a mobile phone, a wide service area is configured by distributing a plurality of radio base stations. Each radio base station forms a radio cell that is in a range where it can communicate with itself. Usually, about 1 to 6 radio cells are managed by one radio base station. In addition, by overlapping a part of the coverage between adjacent radio cells, communication can be continued by handover even when a radio terminal (User Equipment: UE) moves across the radio cells. .
During the installation and operation of the radio base station, coverage of the radio cell is optimized for the purpose of reducing the communication impossible area (coverage hole) and further improving the communication quality of the UE, particularly the throughput. In general, a running test using a dedicated measuring instrument is carried out locally. In the running test, radio wave reception power and interference status, abnormal disconnection of communication and handover failure, throughput, and the like are measured. Then, a place where reception power is insufficient (Weak coverage), a place where strong interference is received (Pilot polarization), and the like are specified, and radio parameters are adjusted to solve these problems. As radio parameters to be adjusted, for example, antenna tilt angle, antenna azimuth angle, transmission power, and handover parameters of a radio cell are generally used.
Optimized coverage of wireless cells based on the above running test is accompanied by an increase in the operating cost of the wireless communication network because it involves manual measurement and wireless parameter tuning work. Therefore, in order to reduce the cost for optimizing the coverage of the radio cell, a technique for autonomously optimizing the coverage of the radio cell has been proposed.
As a technique for autonomously optimizing the coverage of a radio cell, there is CCO (Coverage and Capability Optimization) in SON (Self Organizing Network). SON is a technology that autonomously implements parameter setting and optimization of a wireless communication network that has been performed manually by analyzing quality measurement data collected from wireless terminals and wireless base stations. Standardization is being promoted by 3GPP (3rd Generation Partnership Project) as a technology to reduce infrastructure CAPEX (Capital Expenditures) and OPEX (Operational Expenditure). CCO is one of the usage modes of SON, and collects measurement results of radio quality (for example, RSRP: Reference Signal Received Power, RSRQ: Reference Signal Received Quality, etc.) from radio terminals, and radio parameters of radio cells (eg, transmission) This is a technique for autonomously optimizing the coverage of a radio cell by changing the power and the tilt angle of the antenna.
As another technology, there is ICIC (Inter-Cell Interference Coordination). ICIC is a technique for avoiding interference by reducing transmission power and stopping signal transmission in cooperation between radio base stations based on radio quality information reported from radio terminals.
An example of such a technique is described in Patent Document 1. Patent Document 1 is an invention related to a method for setting a common channel transmission power of a femto cell, and a measurement result of radio quality by a UE (User Equipment) is statistically processed and utilized for each UE by a Home BTS (femto cell). . For example, the initial value of CPICH (Common Pilot Channel) transmission power of the HomeBTS is set to a value proportional to the CPICH reception power of the Macro Cell measured by the HomeBTS. The UE connected to the HomeBTS measures CPICH Ec / No (Received energy per chip divided by the power of power density in the band) and reports it to the HomeBTS. The HomeBTS controls the CPICH transmission power so that the measured value of CPICH Ec / No reported from the UE approaches a predetermined target value. At this time, the CPICH Ec / No statistical value is obtained for each UE registered in the HomeBTS, and the CPICH transmission power is controlled so that the statistical value approaches the target value. As the statistical value, for example, the minimum value of CPICH Ec / No is obtained for each UE, or the X% value of the cumulative distribution of CPICH Ec / No is obtained for each UE.
International Publication No. 2009/047972
By the way, when information such as wireless quality measured by a wireless terminal is collected from the wireless terminal, there is a possibility that different wireless quality may be reported depending on the measured time even if the wireless terminal is moved even if the wireless terminal is the same. There is. Therefore, when these wireless qualities are simply averaged for the same wireless terminal, the averaged wireless quality does not correspond to the wireless quality at any place where the wireless terminal exists, May represent the wireless quality of unrelated places.
On the other hand, a method of processing each measurement report from the wireless terminal individually without performing statistical processing such as averaging is also conceivable. However, when the measurement reports from the wireless terminals are individually processed without being aggregated, there is a problem that the processing load when calculating the optimum values of the wireless parameters using the measurement reports from the wireless terminals increases.
Also, since measurement reports from wireless terminals in various mobile states are mixed, it is difficult to optimize wireless parameters in accordance with wireless terminals in a specific mobile state. For example, when optimizing the coverage of a wireless cell, place importance on the wireless characteristics of a place where continuous communication is performed over a long period of time, such as in a store or a station, or when optimizing handover parameters, It is difficult to emphasize the characteristics.
The present invention has been invented in view of the above problems, and its object is to provide a radio parameter control system, a radio parameter control apparatus, a radio base station, a radio terminal, and radio parameter control capable of determining appropriate radio parameters. It is to provide a method and a program.
The present invention is a radio parameter control system for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal, wherein the magnitude of movement of the radio terminal is within a predetermined range. Wireless terminal movement determining means for determining the wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is within a predetermined range, and a wireless terminal whose magnitude of movement is outside the predetermined range It is a radio parameter control system having radio parameter determination means for distinguishing radio terminal measurement information and determining radio parameters of the radio cell.
The present invention is a radio parameter control apparatus that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal, and reported by a radio terminal whose magnitude of movement is within a predetermined range A radio parameter control apparatus having radio parameter determination means for distinguishing radio terminal measurement information from radio terminal measurement information reported by a radio terminal whose movement is outside a predetermined range and determining radio parameters of the radio cell It is.
The present invention is a radio base station that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal, and a radio reported by a radio terminal whose movement is within a predetermined range A radio base station having radio parameter determining means for distinguishing terminal measurement information from radio terminal measurement information reported by a radio terminal whose movement is outside a predetermined range and determining radio parameters of the radio cell .
The present invention is a wireless terminal in a wireless communication system that determines wireless parameters of a wireless cell using wireless terminal measurement information measured by the wireless terminal, and acquires movement state information related to a movement state of the wireless terminal. It is a radio terminal comprising status information acquisition means and transmission means for including the movement status information in the radio terminal measurement information and transmitting it to the radio base station.
The present invention relates to a wireless terminal in a wireless communication system that determines wireless parameters of a wireless cell using wireless terminal measurement information measured by the wireless terminal, and the magnitude of movement of the wireless terminal is within a predetermined range. Wireless terminal movement determination means for determining whether or not the magnitude of the movement is within a predetermined range, or when the magnitude of the movement is outside a predetermined range, the wireless terminal measurement information, A wireless terminal having transmission means for transmitting to a wireless base station.
The present invention is a radio parameter control method for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal, wherein the magnitude of movement of the radio terminal is within a predetermined range. Wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, and wireless terminal measurement information reported by a wireless terminal whose movement magnitude is outside the predetermined range A radio parameter control method for distinguishing and determining radio parameters of the radio cell.
The present invention relates to a radio parameter control program for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal, wherein the radio has a movement size within a predetermined range. Distinguishing between radio terminal measurement information reported by a terminal and radio terminal measurement information reported by a radio terminal whose magnitude of movement is outside a predetermined range, and executing processing for determining radio parameters of the radio cell It is a program.
The present invention considers the movement state of the wireless terminal that reported the wireless terminal measurement information when determining the wireless parameters of the wireless cell using the wireless terminal measurement information measured by the wireless terminal. Therefore, an appropriate radio parameter can be determined.
FIG. 1 is a configuration diagram of a radio parameter control system according to the present invention. FIG. 2 is a configuration diagram of the first embodiment. FIG. 3 is an operation flowchart of the radio parameter control apparatus 30 in the first embodiment. FIG. 4 is another operation flowchart of the radio parameter control apparatus 30 in the first embodiment. FIG. 5 is an operation flowchart of the wireless parameter control device 30 according to the second embodiment. FIG. 6 is a configuration diagram of the third embodiment. FIG. 7 is a configuration diagram of the fourth embodiment. FIG. 8 is a diagram showing a modification of each embodiment. FIG. 9 is a diagram showing a modification of each embodiment.
The outline of the present invention will be described. FIG. 1 is a configuration diagram of a radio parameter control system according to the present invention.
The wireless parameter control system of the present invention includes a wireless terminal 1, a wireless terminal movement determination unit 2, and a wireless parameter determination unit 3. The wireless communication network 4 is a system that provides a wireless communication service to the wireless terminal 1, and includes a wireless base station, a wireless base station control device, and the like. In the following description, the wireless communication network 4 includes the wireless terminal movement determination unit 2 and the wireless parameter determination unit 3, but is not limited thereto as will be described later. For example, the wireless terminal 1 may include the wireless terminal movement determination unit 2.
The wireless terminal 1 has a function of measuring wireless terminal measurement information based on an instruction from the wireless communication network 4 and transmits the wireless terminal measurement information to the wireless communication network 4. Here, examples of the wireless terminal measurement information measured by the wireless terminal 1 include, for example, wireless quality information of downlink signals. As radio quality information, in the case of LTE (Long Term Evolution), RSRP (ReferenceＲｅSignal Received を Power) representing received power, RSRQ (Reference Signal Received Quality) representing reception quality, and SINR (Signal to noise ratio representing signal to interference noise ratio). to Interference plus Noise Power Ratio), throughput, and similar information thereof.
In addition, the wireless terminal measurement information may include movement state information that enables the wireless terminal 1 to know the movement state of the wireless terminal 1 at the time of measurement of the wireless terminal measurement information or at an arbitrary time within a predetermined time from the measurement time. Examples of the movement state information include information that can directly grasp the movement state such as Doppler frequency and movement speed, and information that can indirectly grasp the movement state such as position information of the wireless terminal (for example, position information by GPS). Including. As will be described later, even if there is no movement state information, the movement state information is not necessarily required as long as the movement of the wireless terminal 1 can be determined by another method. Moreover, you may obtain | require the statistical value of the movement state information acquired over the past several times, for example, an average value, as movement state information included in wireless terminal measurement information.
The wireless terminal movement determination unit 2 determines whether the movement of the wireless terminal 1 that has reported the wireless terminal measurement information is within a predetermined range. Then, the determination result and the wireless terminal measurement information measured by the wireless terminal 1 are output to the wireless parameter determination unit 3.
As a method of determining whether or not the magnitude of movement of the wireless terminal 1 is within a predetermined range, if the movement state information is included in the wireless terminal measurement information, it is determined using that. For example, when information that can directly grasp the movement state such as the Doppler frequency and the movement speed is included as the movement state information, the movement is determined based on these values. When the movement state information is a Doppler frequency, when the Doppler frequency is smaller than a predetermined threshold (for example, equivalent to a movement speed of 1.5 km / h), it is determined that the magnitude of movement is within a predetermined range (no movement). To do. Further, when the movement state information is information that can indirectly grasp the movement state, such as position information, the fluctuation range of the position within a predetermined period is a predetermined threshold (for example, equivalent to a moving speed of 1.5 km / h). When it becomes smaller, it is determined that the magnitude of the movement is within a predetermined range (no movement). Note that, within the predetermined period, it may be determined partially within the predetermined range (no movement) or out of the predetermined range (with movement).
On the other hand, when the movement state information is not included in the wireless terminal measurement information, for example, the determination may be made using the received power of the downlink reference signal (reference signal) included in the wireless terminal measurement information. The determination method determines that the magnitude of movement is within a predetermined range (no movement) when the fluctuation range of the received power of the downlink reference signal within a predetermined period is smaller than a predetermined threshold. At that time, only the reference signal of the serving cell (wireless cell to which the wireless terminal is connected) may be used, or a reference signal of a wireless cell different from the serving cell may be further considered. That is, when determining the movement state only from the fluctuation width of the reception power of one radio cell, when the UE moves on the contour line at the same distance in terms of radio wave propagation from the transmission antenna of the radio cell, There is a possibility that no change occurs and it is erroneously determined that there is no movement. Therefore, the determination accuracy of the movement state of the UE can be improved by further considering the variation in received power of another radio cell having a low correlation with the radio wave propagation characteristics of the radio cell. For example, a radio cell managed by a radio base station that is different from the radio base station that manages the serving cell (here, referred to as a radio cell installed at a position different from the serving cell) may be used. When both a serving cell and a reference signal of a wireless cell installed at a different position from the serving cell are used, both fluctuation ranges (for example, the upper 90% value of the received power of the reference signal−the lower 90% of the received power of the reference signal) When both values are smaller than a predetermined threshold (for example, 10 dB), it is determined that the magnitude of movement is within a predetermined range (no movement). Note that, within the predetermined period, it may be determined partially within the predetermined range (no movement) or out of the predetermined range (with movement).
Based on the result of the wireless terminal movement determination unit 2, the wireless parameter determination unit 3 reports wireless terminal measurement information reported by the wireless terminal 1 whose movement is within a predetermined range (no movement), and the movement magnitude. Is distinguished from the wireless terminal measurement information reported by the wireless terminal 1 that is outside the predetermined range (with movement), and the wireless parameter of the wireless cell is determined.
For example, the wireless parameter determination unit 3 reports the wireless terminal measurement information reported by the wireless terminal 1 whose movement is within a predetermined range, or reported by the wireless terminal 1 whose movement is outside the predetermined range. The radio parameters of the radio cell are determined with emphasis on any of the radio terminal measurement information.
For example, the radio parameter of the radio cell is determined using only the terminal measurement information of the radio terminal 1 whose movement size is within a predetermined range (no movement). Or the radio | wireless parameter of a radio | wireless cell is determined using only the terminal measurement information of the radio | wireless terminal 1 whose magnitude | size of movement is outside a predetermined range (with movement).
For example, the number of reports of wireless terminal measurement information of the wireless terminal 1 whose movement is within a predetermined range (no movement) and the wireless terminal of the wireless terminal 1 whose movement is outside the predetermined range (with movement) The number of measurement information reports is weighted so that the radio terminal measurement information of the radio terminal 1 whose movement is within a predetermined range (no movement) is emphasized, and the radio parameters of the radio cell are determined. . Conversely, the number of reports of the wireless terminal measurement information of the wireless terminal 1 whose movement is within a predetermined range (no movement) and the wireless terminal whose movement is outside the predetermined range (with movement) The number of reports of the wireless terminal measurement information of 1 is weighted so that the wireless terminal measurement information of the wireless terminal 1 whose magnitude of movement is out of a predetermined range (with movement) is emphasized, and the wireless of the wireless cell Determine the parameters.
For example, the radio parameter of the radio cell is determined by increasing the number of reports of the radio terminal measurement information of the radio terminal 1 whose movement size is within a predetermined range (no movement) than the actual number of reports. Alternatively, the wireless terminal measurement information of the wireless terminal 1 whose magnitude of movement is outside a predetermined range (with movement) may be thinned out at a certain rate. On the contrary, the radio parameter of the radio cell is determined by increasing the number of reports of the radio terminal measurement information of the radio terminal 1 whose movement is out of the predetermined range (with movement) than the actual number of reports. To do. Alternatively, the wireless terminal measurement information of the wireless terminal 1 whose movement is within a predetermined range (no movement) may be thinned out at a certain rate.
In addition to the processing of wireless terminal measurement information corresponding to the magnitude of the movement described above, the wireless terminal measurement information may be averaged for each wireless terminal to determine the wireless parameters of the wireless base station.
Further, any of the wireless terminal measurement information reported by the wireless terminal 1 whose movement magnitude is within a predetermined range and the wireless terminal measurement information reported by the wireless terminal 1 whose movement magnitude is outside the predetermined range As an example of importance, the number of reports of wireless terminal measurement information reported by the wireless terminal 1 whose movement magnitude is within a predetermined range and the wireless terminal 1 whose movement magnitude is outside the predetermined range are reported. There is a method in which the number of reported wireless terminal measurement information is compared, and wireless terminal measurement information with a large number of reports is emphasized. Of course, which wireless terminal measurement information is important may be determined in advance.
Furthermore, either wireless terminal measurement information reported by the wireless terminal 1 whose movement magnitude is within a predetermined range or wireless terminal measurement information reported by the wireless terminal 1 whose movement magnitude is outside the predetermined range The number of reports of wireless terminal measurement information reported by the wireless terminal 1 whose movement magnitude is within a predetermined range and the wireless terminal 1 whose movement magnitude is outside the predetermined range are determined in advance. By comparing the number of reported wireless terminal measurement information, the wireless terminal measurement information reported by the wireless terminal 1 whose movement is within a predetermined range and the movement is outside the predetermined range. You may make it determine whether the determination process of the radio | wireless parameter which distinguished the radio | wireless terminal measurement information which the radio | wireless terminal 1 reported is implemented. For example, when the number of reports of important wireless terminal measurement information is larger than the number of reports of non-important wireless terminal measurement information, determination of wireless parameters that distinguish the magnitude of movement of the wireless terminal 1 that reported the wireless terminal measurement information Process. On the other hand, when the number of reports of important radio terminal measurement information is smaller than the number of reports of non-important radio terminal measurement information, radio parameters that distinguish the magnitude of movement of the radio terminal 1 that reported the radio terminal measurement information The determination process is not performed. As another example, the ratio of the number of reports of important wireless terminal measurement information to the number of reports of non-important wireless terminal measurement information (the number of reports of important wireless terminal measurement information ÷ the number of reports of non-important wireless terminal measurement information) is predetermined. When the value is equal to or greater than 2 (for example, 2), wireless parameter determination processing may be performed in which the magnitude of movement of the wireless terminal 1 that reported the wireless terminal measurement information is distinguished.
As described above, in the present embodiment, the wireless terminal measurement information of the wireless terminal 1 whose magnitude of movement is within a predetermined range (no movement) and the magnitude of movement are outside the predetermined range (with movement). The radio parameters of the radio cell are determined by distinguishing from the radio terminal measurement information of the radio terminal 1. Therefore, it is possible to determine appropriate radio parameters according to the situation. In particular, optimal radio parameters can be determined for locations where users frequently communicate continuously or near the boundaries of radio cells that are subject to band-over.
Further, wireless terminal measurement information of the wireless terminal 1 whose movement is within a predetermined range (no movement), and wireless terminal measurement information of the wireless terminal 1 whose movement is outside the predetermined range (with movement) By selecting wireless terminal measurement information to be used for determining wireless parameters, the number of processing targets of wireless terminal measurement information can be reduced, and the processing load when calculating the optimum value of wireless parameters can be reduced. be able to.
In the above description, the wireless terminal movement determination unit 2 is provided in the wireless communication network 4, but the wireless terminal movement determination unit 2 may be provided in the wireless terminal 1. In this case, the wireless terminal 1 determines whether the magnitude of the movement of the own wireless terminal is within a predetermined range (no movement) or outside the predetermined range (with movement), and the determination result is the wireless terminal. It may be included in the measurement information and transmitted to the wireless communication network 4. Furthermore, the wireless terminal 1 transmits the wireless terminal measurement information to the wireless communication network only when the magnitude of the movement is within a predetermined range (no movement) or outside the predetermined range (with movement) as a result of the movement determination. 4 may be transmitted. With this configuration, the processing load on the wireless communication network 4 can be reduced.
Hereinafter, specific embodiments will be described.
In the first embodiment, wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, wireless terminal measurement information reported by a wireless terminal whose movement magnitude is outside the predetermined range, and As an example of emphasizing any one of the above, an example will be described in which only wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is within a predetermined range is used.
The wireless communication system according to the first embodiment includes a plurality of wireless terminals (hereinafter referred to as UE) 10, a wireless base station 20, and a wireless parameter control device 30.
The UE 10 has a function of measuring radio quality information as radio terminal measurement information. The radio quality information includes a measurement result of radio quality of a radio cell (serving cell) to which the UE 10 is connected. Further, the radio quality information may include a measurement result of radio quality of surrounding radio cells other than the serving cell of the UE 10. A typical example of the radio quality measured by the UE 10 is the reception quality of a radio signal (downlink signal) transmitted from the radio base station 20.
The reception quality information is, for example, a downlink pilot signal, a received power of a downlink reference signal (reference signal), or a signal-to-interference noise ratio such as SINR (Signal to Interference plus Noise Ratio). In the case of W-CDMA, the radio quality measured by the UE 10 is the received power (CPICH RSCP (Received Signal Code Power)) of the common pilot channel (CPICH: Common Pilot Channel) for each radio cell, or per chip of the CPICH. The ratio of energy to in-band received power density (Ec / No) may be used. In addition, in the case of LTE (Long Term Evolution), the radio quality measured by the UE 10 is the received power (RSRP: Reference Signal Received Power) of the downlink reference signal (Downlink Reference Signal) and the reception quality (RSRQ: ReferenceReceiveReceiveQ). ).
Further, the radio quality information includes communication quality such as throughput and BLER (Block Error Rate), event information such as occurrence of abnormal disconnection or handover failure, time when the UE measures radio quality, radio cell 40 corresponding to each radio quality. And information such as the identifier of the UE 10 may be included.
The UE 10 transmits the measured radio quality information to the radio base station 20 as radio terminal measurement information.
The radio base station 20 manages the radio cell 40 and performs bidirectional radio communication with a plurality of UEs 10. And it has a function which collects the radio | wireless terminal measurement information (radio quality information) measured by subordinate UE10, and notifies the information to the radio | wireless parameter control apparatus 30. FIG. Not only the wireless quality information but also performance counter information (for example, the number of communication occurrences, the number of handovers, the resource block usage rate, etc.) aggregated in units of wireless cells may be notified to the wireless parameter control device 30. Further, the radio base station 20 has a function of changing its own radio parameters and radio parameters of radio cells managed by the radio base station 20 according to the radio parameter determination result in the radio parameter control device 30. In addition, in FIG. 2, although illustrated about the form which each radio base station 20 manages one radio cell 40, it is not limited to this. That is, each radio base station 20 may take a form in which a plurality of radio cells 40 are managed.
The radio parameter control device 30 determines radio parameters of the radio cell 40 based on radio terminal measurement information (radio quality information) and performance counter information reported from the radio base station 20, and manages the radio cell based on the result. Has a function of notifying the radio base station 20 to be notified. The wireless parameter control device 30 includes a wireless terminal measurement information database 31, a wireless terminal movement determination unit 32, a wireless terminal measurement information aggregation unit 33, and a wireless parameter determination unit 34.
The wireless terminal measurement information database 31 is a database in which wireless terminal measurement information (wireless quality information) and performance counter information reported from the wireless base station 20 are registered. Each piece of information may be stored in association with the measured time. Further, the results aggregated by the wireless terminal measurement information aggregation unit 33 may be stored.
The wireless terminal movement determination unit 32 determines whether the movement magnitude of the UE 10 is within a predetermined range. In this embodiment, the determination is made using the received power of the downlink reference signal, which is one of the radio quality information. The determination method determines that the magnitude of movement is within a predetermined range (no movement) when the fluctuation range of the received power of the downlink reference signal within a predetermined period is smaller than a predetermined threshold. At that time, as described above, only the reference signal of the serving cell (wireless cell to which the wireless terminal is connected) may be used, or the reference signal of the wireless cell installed at a position different from the serving cell may be further considered. For example, when both a serving cell and a reference signal of a radio cell installed at a different position from the serving cell are used, both fluctuation ranges (for example, the upper 90% value of the received power of the reference signal−the lower value of the received power of the reference signal) 90% value) is smaller than a predetermined threshold (for example, 10 dB), it is determined that the magnitude of movement is within a predetermined range (no movement). Note that, within the predetermined period, it may be determined partially within the predetermined range (no movement) or out of the predetermined range (with movement).
The wireless terminal measurement information totaling unit 33 receives the determination result of the wireless terminal movement determination unit 32, totals wireless terminal measurement information (wireless quality information), and wireless terminal measurement information that is an evaluation target when determining wireless parameters. (Radio quality information) is registered in its own database. Specifically, the radio terminal measurement information totaling unit 33 uses only the radio terminal measurement information (radio quality information) reported by the UE 10 determined that the magnitude of movement is within a predetermined range (no movement) in its own database. The radio terminal measurement information (radio quality information) reported by the UE 10 that has been registered and determined that the magnitude of movement of the UE 10 is outside the predetermined range (with movement) is not registered. In addition, the wireless terminal measurement information totaling unit 33 includes the wireless terminal measurement information (wireless quality information) reported by the UE 10 determined that the magnitude of movement is within a predetermined range (no movement), and the magnitude of movement is predetermined. The radio terminal measurement information (radio quality information) reported by the UE 10 determined to be out of range (with movement) may be distinguished and registered. As a method of distinguishing, the radio terminal measurement information (radio quality information) reported by the UE 10 determined that the magnitude of movement is within a predetermined range (no movement) may be registered with a flag. . For the radio terminal measurement information (radio quality information) reported by the UE 10 determined that the magnitude of movement is within a predetermined range (no movement), a plurality of radio qualities reported from the UE 10 are compressed in order to compress the data size. Information may be averaged. At that time, it is preferable to store the number of pieces of radio quality information used for averaging. Note that the wireless terminal measurement information (wireless quality information) to be evaluated when determining the wireless parameters may be registered in the wireless terminal measurement information database 31.
The radio parameter determination unit 34 determines the radio parameters of the radio cell 40 using the aggregation result of the radio terminal measurement information by the radio terminal measurement information aggregation unit 33 and the performance counter information collected from the radio base station 20. In the present embodiment, UE 10 determined that the magnitude of movement is within a predetermined range (no movement) among the radio terminal measurement information (radio quality information) aggregated by radio terminal measurement information aggregation section 33 is reported. Wireless parameters are determined using wireless terminal measurement information (wireless quality information) as an evaluation target when determining wireless parameters.
For example, for each wireless terminal measurement information (radio quality information) reported by the UE 10 that has been identified and registered by the wireless terminal measurement information aggregation unit 33 and whose movement magnitude is determined to be within a predetermined range (no movement). Communication quality (for example, throughput) is predicted, and the radio parameters of the radio cell 40 are determined so that the communication quality is improved.
A specific example of a method for predicting communication quality will be described. Here, a case will be described in which the reception power (RSRP) for each radio cell is included as the radio terminal measurement information, and the transmission power of the radio cell is determined as the radio parameter. The radio parameter determination unit targets the radio terminal measurement information reported by the UE 10 whose magnitude of movement is determined to be within a predetermined range (no movement), and performs throughput for each transmission power candidate value by the following method. Is predicted for each wireless terminal measurement information.
The received power (RSRP [dBm]) for each wireless cell included in the wireless terminal measurement information is
(RSRPs, RSRPn1, RSRPn2, ..., RSRPni)
far. Here, RSRPs represents RSRP of a radio cell (hereinafter, a control target radio cell) for which a radio parameter is determined. RSRPn1, RSRPn2,..., RSRPni represents the RSRP of each radio cell from the peripheral radio cell 1 to the peripheral radio cell i.
First, the RSRP for each radio cell is predicted when it is assumed that the transmission power of the control target radio cell is changed from the current Pr [dBm] to the candidate value Pc [dBm]. For example, assuming that only the RSRP (RSRPs) of the control target radio cell changes by the change amount of the transmission power,
(RSRPs- (Pr-Pc), RSRPn1, RSRPn2,..., RSRPni)
Can be predicted as
Next, the prediction results are rearranged in descending order, and the RSRP unit is converted from a decibel value (dBm) to a real value (mW).
(S1, I1, I2, ..., Ini)
far. At this time, since the radio cell corresponding to S1 is a radio cell having the highest RSRP when it is assumed that the transmission power of the control target radio cell is changed, it can be regarded as a serving cell when the transmission power is changed. .
When assuming that the transmission power of the control target radio cell is changed to the candidate value Pc [dBm], the SINR of the radio terminal measurement information is
SINR = S1 / (I1 + I2 +... + Ini + NOISE)
Can be predicted as Note that NOISE represents thermal noise [mW]. For the following explanation, the result of converting the above SINR into a decibel value (dB) is set as SINR ′.
The throughput (TP) of the wireless terminal measurement information when it is assumed that the transmission power of the control target wireless cell is changed to the candidate value Pc [dBm] is calculated using the Shannon equation well known to those skilled in the art.
TP = B × log 2 (1 + SINR ′) × α
Can be predicted as Here, B is the system bandwidth [Hz], and α is a constant representing the amount of deterioration from the theoretical limit that occurs depending on the implementation of the receiver.
The wireless parameter determination unit may predict the throughput for each wireless terminal measurement information for each wireless parameter candidate value as described above, and determine the wireless parameter candidate value that is expected to improve the throughput most. The wireless parameter determination method shown here is merely an example, and does not limit the application target of the present invention. That is, any method for determining radio parameters of a radio cell using radio terminal measurement information may be used.
Next, the operation of the wireless parameter control device 30 of the first embodiment will be described.
FIG. 3 is an operation flowchart of the wireless parameter control device 30 according to the first embodiment.
First, the radio parameter control device 30 collects radio terminal measurement information collected by the radio base station 20 (Step 1). The collected wireless terminal measurement information (wireless quality information) is registered in the wireless terminal measurement information database 31.
Next, the wireless terminal movement determination unit 32 of the wireless parameter control device 30 selects one wireless terminal measurement information (wireless quality information) for evaluating the movement amount (movement magnitude) from the wireless terminal measurement information database 31. (Step 2). Here, the wireless terminal measurement information (wireless quality information) may be time-series data of wireless terminal measurement information (wireless quality information) reported from the same wireless terminal, or snapshot data at one time point. Can be.
The radio terminal movement determination unit 32 calculates the movement amount of the UE 10 using the radio terminal measurement information (radio quality information) (Step 3). Then, based on the calculated result, it is determined whether the magnitude of movement of the UE 10 is within a predetermined range (no movement) with respect to the wireless terminal measurement information (Step 4). For example, the wireless terminal movement determination unit 32 uses the received power of the downlink reference signal, which is one of wireless terminal measurement information (wireless quality information), so that the magnitude of movement of the UE 10 is within a predetermined range (no movement). Determine whether. The determination method determines that the magnitude of movement is within a predetermined range (no movement) when the fluctuation range of the received power of the downlink reference signal within a predetermined period is smaller than a predetermined threshold. At that time, as described above, only the reference signal of the serving cell (wireless cell to which the wireless terminal is connected) may be used, or the reference signal of the wireless cell installed at a position different from the serving cell may be further considered. For example, when both a serving cell and a reference signal of a radio cell installed at a different position from the serving cell are used, both fluctuation ranges (for example, the upper 90% value of the received power of the reference signal−the lower value of the received power of the reference signal) 90% value) is smaller than a predetermined threshold (for example, 10 dB), it is determined that the magnitude of movement is within a predetermined range (no movement).
The wireless terminal measurement information totaling unit 33 of the wireless parameter control device 30 receives the determination result of the wireless terminal movement determination unit 32, and wireless terminal measurement information (wireless quality information) whose movement is within a predetermined range (no movement). ) Is registered in its own database as an evaluation target when determining the wireless parameters (Step 5). On the other hand, wireless terminal measurement information whose magnitude of movement is outside the predetermined range (with movement) is not included in the evaluation target when determining the radio parameter, and is not registered in its own database. At this time, in a form that can be distinguished from wireless terminal measurement information (that is, wireless terminal measurement information included in an evaluation target when determining a wireless parameter) of a wireless terminal whose movement is within a predetermined range (no movement). In addition, wireless terminal measurement information (that is, wireless terminal measurement information that is not included in the evaluation target when determining wireless parameters) of a wireless terminal whose movement is out of a predetermined range (with movement) is also registered in its own database. Also good.
The wireless terminal measurement information totaling unit 33 determines whether or not the processing from Step 2 to Step 5 has been performed on all wireless terminal measurement information (wireless quality information) (Step 6).
When it is determined that the processing from Step 2 to Step 5 has been performed on all wireless terminal measurement information (wireless quality information), the wireless terminal measurement information totaling unit 33 sets the wireless parameter as an evaluation target. Averaging processing for each wireless terminal is performed on the registered wireless terminal measurement information (wireless quality information) (Step 7). For example, when the radio terminal measurement information (radio quality information) includes the received power (RSRP: Reference Signal Received Power) of the downlink reference signal (reference signal) (Downlink Reference Signal) for each radio cell, for each radio terminal The received power of the same radio cell may be averaged. Here, statistical processing such as obtaining a median value may be performed instead of averaging. This process is not always necessary and may be performed in a timely manner.
Then, the wireless parameter determination unit 34 of the wireless parameter control device 30 determines wireless parameters using the averaged wireless terminal measurement information, and notifies the wireless base station 20 of the result (Step 8).
In the first embodiment described above, an example in which only wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range has been described. However, the movement magnitude is outside the predetermined range. The wireless terminal measurement information reported by the wireless terminal may be emphasized, and only the wireless terminal measurement information reported by the wireless terminal whose movement is out of a predetermined range may be used.
In this case, in the processing of Step 4 and Step 5 described above, contrary to the above description, the radio terminal measurement information (radio quality information) whose magnitude of movement is out of a predetermined range (with movement) is set as the radio parameter. What is necessary is just to make it register as an evaluation object at the time of determination. Then, if the wireless parameter is determined using only the wireless terminal measurement information that is registered as an evaluation target when determining the wireless parameter and that is reported by the wireless terminal whose movement is outside the predetermined range, good. The operation in this case will be described with reference to the flowchart of FIG.
The operation from Step 1 to Step 3 is similar to the above-described operation.
The wireless terminal movement determining unit 32 determines whether the movement magnitude of the UE that has reported the wireless terminal measurement information is within a predetermined range (with movement) based on the movement amount calculation result (Step 20).
The wireless terminal measurement information totaling unit 33 of the wireless parameter control device 30 receives the determination result of the wireless terminal movement determination unit 32, and the wireless terminal measurement information (wireless quality information) whose movement is out of a predetermined range (with movement). ) Is registered in its own database as an evaluation target when determining the wireless parameters (Step 21). On the other hand, wireless terminal measurement information whose movement is within a predetermined range (no movement) is not registered because it is not included in the evaluation target when determining the wireless parameter. At this time, in a form that can be distinguished from wireless terminal measurement information (that is, wireless terminal measurement information included in an evaluation target when determining a wireless parameter) of a wireless terminal whose magnitude of movement is outside a predetermined range (with movement). The wireless terminal measurement information (that is, wireless terminal measurement information that is not included in the evaluation target when determining the wireless parameter) of the wireless terminal whose movement is within a predetermined range (no movement) is also registered in its own database. Also good.
Since the operation after Step 6 is the same as described above, the description thereof is omitted.
In the above description, the case where the radio terminal measurement information to be emphasized is determined in advance has been described. However, the UE 10 that does not determine the radio terminal measurement information to be emphasized in advance and the magnitude of movement is within a predetermined range is described. Compare the number of reported radio terminal measurement information with the number of reported radio terminal measurement information reported by UE 10 whose movement is out of a predetermined range, and attach importance to the radio terminal measurement information of UE 10 with a large number of reports. You may make it do.
Further, in the above-described embodiment, wireless terminal measurement information reported by UE 10 whose movement magnitude is within a predetermined range, or wireless terminal measurement information reported by UE 10 whose movement magnitude is outside the predetermined range. Which of these is prioritized is determined in advance, and the radio parameters of the radio cell are determined regardless of the number of reports. However, in the actual number of reports, the number of reports of radio terminal measurement information reported by the UE 10 whose movement magnitude is within the predetermined range and the radio terminal measurement reported by the UE 10 whose magnitude of movement is outside the predetermined range The number of information reports is compared, and based on the result, the radio terminal measurement information reported by the UE 10 whose magnitude of movement is within the predetermined range and the UE 10 whose magnitude of movement is outside the predetermined range are reported. It may be determined whether or not to execute a wireless parameter determination process that distinguishes from the wireless terminal measurement information.
For example, when the number of reports of important radio terminal measurement information is larger than the number of reports of non-important radio terminal measurement information, radio parameter determination processing that distinguishes the magnitude of movement of the UE 10 that reported the radio terminal measurement information is performed. Do. On the other hand, when the number of reports of important radio terminal measurement information is smaller than the number of reports of non-important radio terminal measurement information, radio parameters that distinguish the magnitude of movement of the radio terminal 1 that reported the radio terminal measurement information The determination process is not performed. As another example, the ratio of the number of reports of important wireless terminal measurement information to the number of reports of non-important wireless terminal measurement information (the number of reports of important wireless terminal measurement information ÷ the number of reports of non-important wireless terminal measurement information) is predetermined. When the value is equal to or greater than 2 (for example, 2), wireless parameter determination processing may be performed in which the magnitude of movement of the wireless terminal 1 that reported the wireless terminal measurement information is distinguished.
By performing such a determination process, it is possible to avoid a determination process of radio parameters of a radio cell that is contrary to the actual UE movement status.
In the first embodiment, only the wireless terminal measurement information reported by the wireless terminal determined not to move or only the wireless terminal measurement information reported by the determined wireless terminal moving is used. Since the radio parameters are determined, it is possible to determine the optimal radio parameters suitable for the measured location and the movement status of the radio terminal. In particular, the radio characteristics at a place where the user is stationary and continuously communicating and the radio characteristics at a place where the user communicates while moving are sufficiently reflected when determining the radio parameters.
In addition, only wireless terminal measurement information reported by a wireless terminal determined not to move or wireless terminal measurement information reported by a wireless terminal determined to be moving is used, and processing is performed when determining a wireless parameter. Since the number of target wireless terminal measurement information is reduced, it is possible to reduce the processing load when calculating the optimum value of the wireless parameter.
In the first embodiment described above, the example in which the radio parameter is determined using only the radio terminal measurement information reported by the radio terminal to be emphasized has been described.
In the second embodiment, wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, and wireless terminal measurement information reported by a wireless terminal whose movement magnitude is outside the predetermined range; An example will be described in which wireless parameters are determined in consideration of wireless terminal measurement information that is focused on either of the above and non-focused wireless terminal measurement information.
In the following description, in order to facilitate understanding, while focusing on wireless terminal measurement information reported by a wireless terminal whose movement is within a predetermined range (no movement), the movement is out of the predetermined range. Although an explanation will be given using an example in which the wireless terminal measurement information reported by the (mobile) wireless terminal is also considered, it is needless to say that the reverse is also possible. Since the basic configuration is the same as that of the first embodiment, a different configuration will be described.
The second embodiment is different from the first embodiment in that the radio terminal measurement information totaling unit 33 reports a radio terminal (UE10) determined that the magnitude of movement is within a predetermined range (no movement). Weighted radio terminal measurement information or radio terminal measurement information reported by a radio terminal (UE10) determined that the magnitude of movement is out of a predetermined range (with movement). The radio terminal measurement information of the UE 10 determined to be within the range (no movement) is more important than the radio terminal measurement information of the UE 10 whose magnitude of movement is determined to be outside the predetermined range (with movement).
As one embodiment, weighting is performed on the number of reports of wireless terminal measurement information reported by the UE 10 determined that the magnitude of movement is within a predetermined range (no movement), and the magnitude of movement is within a predetermined range. What is necessary is just to increase the number of reports of the radio | wireless terminal measurement information which UE10 determined to be inside (no movement) reports more than the actual number of reports.
In this case, the radio parameter determination unit 34 determines that the radio terminal measurement information whose number of reports has been increased by the radio terminal measurement information totaling unit 33 (that is, the UE 10 that has been determined that the magnitude of movement is within a predetermined range (no movement)). Reported radio terminal measurement information) and radio terminal measurement information whose number of reports has not been changed (that is, radio terminal measurement information reported by the UE 10 determined that the magnitude of movement is out of a predetermined range (with movement)) Is used to determine the radio parameters.
Next, the operation of the wireless parameter control device 30 according to the second embodiment will be described.
FIG. 5 is a flowchart showing an example of the operation of the wireless parameter control device 30 according to the second embodiment.
From Step 1 to Step 4, the operation is the same as that of the first embodiment.
Next, the wireless terminal measurement information totaling unit 33 of the wireless parameter control device 30 receives the determination result of the wireless terminal movement determination unit 32, and the wireless reported by the UE 10 whose movement size is within a predetermined range (no movement). The terminal measurement information and the wireless terminal measurement information reported by the UE 10 whose movement is out of a predetermined range (with movement) are distinguished and registered in own data (Steps 10 and 11). In the present embodiment, any of the distinguished radio terminal measurement information is treated as an evaluation target when determining radio parameters.
It is determined whether or not the processing from Step 2 to Step 4, and Step 10 or Step 11 has been performed on all wireless terminal measurement information (Step 6).
Subsequently, the radio terminal measurement information totaling unit 33 performs the averaging process for each UE 10 on the radio terminal measurement information reported by the UE 10 whose magnitude of movement is within a predetermined range (no movement) (Step) 12). This process is not always necessary and may be performed in a timely manner.
Further, the wireless terminal measurement information totaling unit 33 weights the number of reports of the wireless terminal measurement information reported by the UE 10 whose magnitude of movement is within a predetermined range (no movement), and increases the number of reports (Step 13 ). That is, wireless terminal measurement information that was actually reported only once is handled as having been reported multiple times. Alternatively, the wireless terminal measurement information reported by the UE 10 whose movement size is outside a predetermined range (with movement) may be thinned out.
The radio parameter determination unit 34 of the radio parameter control device 30 then measures all radio terminal measurement information to be evaluated when determining radio parameters, that is, radio terminal measurement information whose number of reports has been increased (that is, the magnitude of movement). Radio terminal measurement information reported by UE 10 determined to be within a predetermined range (no movement), and radio terminal measurement information whose number of reports has not changed (that is, the magnitude of movement is outside the predetermined range (movement) The wireless parameter is determined using the wireless terminal measurement information reported by the UE 10 determined to be present), and the result is notified to the wireless base station 20 (Step 14).
Other operations are the same as those in the above-described embodiment, and thus description thereof is omitted.
As another example, as described in the first embodiment, when determining the radio parameter by predicting the communication quality (for example, throughput) for each radio terminal measurement information, the magnitude of movement is small. The communication quality predicted using the radio terminal measurement information reported by the UE 10 within a predetermined range (without movement) and the radio terminal measurement information reported by the UE 10 whose movement size is outside the predetermined range (with movement) The communication quality predicted by use may be weighted so that the wireless terminal measurement information reported by the UE 10 whose magnitude of movement is within a predetermined range (no movement) is emphasized. For example, the average value of the communication quality predicted using the wireless terminal measurement information reported by the UE 10 whose movement is within a predetermined range (no movement) is X, and the movement is outside the predetermined range (with movement) If the average value of the communication quality predicted using the wireless terminal measurement information reported by the UE 10 is Y, the total communication quality is evaluated as α · X + β · Y. Here, by setting the parameter α to a value larger than the parameter β, the radio terminal measurement information reported by the UE 10 whose magnitude of movement is within a predetermined range (no movement) can be emphasized.
In the above description, a case has been described in which it is determined in advance that importance is placed on the wireless terminal measurement information reported by the UE 10 whose magnitude of movement is within a predetermined range (no movement). Compare the number of reports of the radio terminal measurement information reported by the UE 10 within the predetermined range with the number of reports of the radio terminal measurement information reported by the UE 10 whose movement is outside the predetermined range. You may attach importance to wireless terminal measurement information.
Further, which of the radio terminal measurement information reported by the UE 10 whose movement magnitude is within the predetermined range or the radio terminal measurement information reported by the UE 10 whose movement magnitude is outside the predetermined range is to be emphasized? The number of reports of radio terminal measurement information that is determined in advance and reported by UE 10 whose movement is within a predetermined range, and the report of radio terminal measurement information that is reported by UE 10 whose movement is outside the predetermined range By comparing the number, the wireless terminal measurement information reported by the UE 10 whose movement magnitude is within the predetermined range and the wireless terminal measurement information reported by the UE 10 whose movement magnitude is outside the predetermined range You may make it determine whether the determination process of the distinguished radio | wireless parameter is implemented. For example, when the number of reports of important radio terminal measurement information is larger than the number of reports of non-important radio terminal measurement information, radio parameter determination processing that distinguishes the magnitude of movement of the UE 10 that reported the radio terminal measurement information is performed. Do. On the other hand, when the number of reports of the radio terminal measurement information to be emphasized is smaller than the number of reports of the radio terminal measurement information not to be emphasized, determination of radio parameters that distinguish the magnitude of movement of the UE 10 that reported the radio terminal measurement information No processing is performed. As another example, the ratio of the number of reports of important wireless terminal measurement information to the number of reports of non-important wireless terminal measurement information (the number of reports of important wireless terminal measurement information ÷ the number of reports of non-important wireless terminal measurement information) is predetermined. When the value is equal to or greater than 2 (for example, 2), radio parameter determination processing that distinguishes the magnitude of movement of the UE 10 that has reported the radio terminal measurement information may be performed.
In the second embodiment, wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, and wireless terminal measurement information reported by a wireless terminal whose movement magnitude is outside the predetermined range; In addition to the effect of the first embodiment, wireless parameters that take into account the balance of the entire wireless cell can be determined.
In the first and second embodiments described above, an example in which only wireless quality information is included in the wireless terminal measurement information has been described.
In the third embodiment, the wireless terminal measurement information includes movement state information acquired on the wireless terminal side in addition to the wireless quality information, and the movement state information indicates that the movement amount of the wireless terminal is within a predetermined range. An example of determining whether or not (no movement) will be described. Since the basic configuration is the same as that of the above-described embodiment, different configurations will be described.
FIG. 6 is a configuration diagram of the third embodiment. The third embodiment is different from the above-described embodiment in that the wireless terminal (UE 10) has a movement state information acquisition unit 11 that acquires movement state information regarding the movement state of the wireless terminal.
The movement state information acquisition unit 11 acquires movement state information related to movement of the UE 10 when measuring the radio quality. As movement state information to be acquired, for example, movement state such as Doppler frequency and movement speed can be directly grasped, and movement state such as position information of a wireless terminal (for example, position information by GPS) can be indirectly grasped. Information can be considered. Note that the timing for acquiring the movement state information does not necessarily have to be at the time of measuring the radio quality, and may be any time within a predetermined time from the time of measuring the radio quality. Moreover, you may obtain | require the average value of the movement state information acquired over the past several times.
In the UE 10, the movement state information acquired by the movement state information acquisition unit 11 is included in the wireless terminal measurement information together with the wireless quality information and transmitted to the wireless base station 20.
The wireless terminal movement determination unit 32 determines whether the movement magnitude of the UE 10 is within a predetermined range based on the movement state information. As a method of determining whether the magnitude of the movement is within a predetermined range, when movement state information such as the Doppler frequency and movement speed that can directly grasp the movement state is included, the movement is determined by these values. judge. For example, when the movement state information is a Doppler frequency, the magnitude of movement is within a predetermined range (no movement) when the Doppler frequency is smaller than a predetermined threshold (for example, equivalent to a moving speed of 1.5 Km / h). Is determined. In addition, when the movement state information is information such as position information that can indirectly grasp the movement state, the fluctuation range of the position within a predetermined period is a predetermined threshold (for example, equivalent to a moving speed of 1.5 km / h). When it becomes smaller, it is determined that the magnitude of the movement is within a predetermined range (no movement). Note that it may be determined that the magnitude of the movement is partially within a predetermined range (no movement) or the magnitude of the movement is outside the predetermined range (with movement) within the predetermined period.
In the third embodiment, since the movement of the wireless terminal is determined using the movement state information acquired on the wireless terminal side, in addition to the effect of the above-described embodiment, the processing of the wireless parameter control device 30 is performed. Can be reduced. Further, by using the movement state information acquired on the wireless terminal side, there is an advantage that the accuracy of determining whether the wireless terminal is moving can be improved.
In the fourth embodiment, an example in which a wireless terminal (UE10) includes a movement state information acquisition unit 11 that acquires movement state information related to a movement state of a wireless terminal and a wireless terminal movement determination unit 32 will be described. Since the basic configuration is the same as that of the above-described embodiment, different configurations will be described.
FIG. 7 is a block diagram of the fourth embodiment.
The radio terminal movement determination unit 32 of the UE 10 determines whether the movement magnitude of the UE 10 is within a predetermined range based on the movement state information acquired by the movement state information acquisition unit 11. As a method of determining whether or not the magnitude of movement is within a predetermined range, for example, when movement state information such as Doppler frequency or movement speed that can directly grasp the movement state is included, these values are used. Determine movement. For example, when the movement state information is a Doppler frequency, the magnitude of movement is within a predetermined range (no movement) when the Doppler frequency is smaller than a predetermined threshold (for example, equivalent to a moving speed of 1.5 km / h). Is determined. In addition, when the movement state information is information that can indirectly grasp the movement state such as position information, the fluctuation range of the position within a predetermined period is a predetermined threshold (for example, equivalent to a moving speed of 1.5 km / h). When it becomes smaller, it is determined that the magnitude of the movement is within a predetermined range (no movement). Note that it may be determined that the magnitude of the movement is partially within a predetermined range (no movement) or the magnitude of the movement is outside the predetermined range (with movement) within the predetermined period.
Then, the UE 10 transmits the determination result of the movement state of the wireless terminal movement determination unit 32 and the wireless quality information to the wireless base station 20 as wireless terminal measurement information. Note that the UE 10 may transmit the radio quality information only when the radio terminal movement determination unit 32 determines that there is no movement or only when it is determined that there is movement.
In the fourth embodiment, in addition to the effects of the above-described embodiment, the movement state information is determined on the wireless terminal side using the movement state information. Therefore, the movement state determination is performed on the wireless parameter control device 30 side. There is no need to perform this, and the processing load of the wireless parameter control device 30 can be reduced.
<Modification of each embodiment>
In the embodiment described above, the wireless parameter control device 30 includes the wireless terminal measurement information database 31, the wireless terminal movement determination unit 32, the wireless terminal measurement information aggregation unit 33, and the wireless parameter determination unit 34. Explained.
However, it is not always necessary for the wireless parameter control device 30 to include all of these.
For example, as shown in FIG. 8, the wireless base station 20 has all the functions of the wireless parameter control device 30, that is, the wireless terminal measurement information database 31, the wireless terminal movement determination unit 32, and the wireless terminal measurement information totaling unit. 33 and a radio parameter determination unit 34 may be provided. In this case, since the radio parameters of a plurality of radio base stations can be optimized independently for each radio base station, the control period of the radio parameters can be shortened.
9, the radio base station 20 includes a radio terminal measurement information database 31, a radio terminal movement determination unit 32, and a radio terminal measurement information totaling unit 33, and the radio parameter control device 30 determines radio parameters. The part 34 may be provided. In this case, since only the aggregated radio quality information needs to be notified from the radio base station 20 to the radio parameter control device 30, the amount of transmission data to the radio parameter control device 30 can be reduced, The processing load can be reduced.
This is the end of the description of the embodiment of the present invention, but as is apparent from the above description, each unit may be configured by hardware or may be realized by a computer program. In this case, functions and operations similar to those of the above-described embodiments are realized by a processor that operates according to a program stored in the program memory. Moreover, you may implement | achieve only a part of function of embodiment mentioned above with a computer program.
The contents of the above embodiment can also be expressed as follows.
(Appendix 1) A radio parameter control system that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
Wireless terminal movement determination means for determining whether or not the magnitude of movement of the wireless terminal is within a predetermined range;
Distinguishing between wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is within a predetermined range and wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is outside a predetermined range, A radio parameter control system comprising radio parameter determination means for determining radio parameters of a radio cell.
(Supplementary Note 2) The wireless parameter determining means is wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, or a wireless terminal whose movement magnitude is outside a predetermined range. The radio parameter control system according to supplementary note 1, wherein one of the radio terminal measurement information is emphasized and radio parameters of the radio cell are determined.
(Additional remark 3) The said radio | wireless parameter determination means weights with respect to the said radio | wireless terminal measurement information which attaches importance, or weights with respect to the said radio | wireless terminal measurement information which does not attach importance, and describes the radio parameter of the said radio | wireless cell. Wireless parameter control system.
(Additional remark 4) The said radio | wireless parameter determination means is a radio | wireless parameter control system of Additional remark 2 or Additional remark 3 which determines the radio | wireless parameter of the said radio | wireless cell only using the said radio | wireless terminal measurement information to attach importance.
(Additional remark 5) The said radio | wireless parameter determination means is the number of reports of the said important radio | wireless terminal measurement information so that the ratio of the number of reports of the said important radio | wireless terminal measurement information with respect to the number of reports of the radio | wireless terminal measurement information which is not emphasized becomes high. Alternatively, the radio parameter control system according to appendix 2 or appendix 3, wherein the radio parameter of the radio cell is determined by changing the number of reports of radio terminal measurement information that is not important.
(Supplementary Note 6) The wireless parameter determination means, when determining the wireless parameter by evaluating the communication quality for each wireless terminal measurement information, the wireless terminal measurement that does not consider the communication quality of the wireless terminal measurement information to be important. 4. The wireless parameter control system according to appendix 2 or appendix 3, wherein the evaluation is performed with weighting more than the communication quality of information.
(Supplementary note 7) The wireless parameter determining means reports wireless terminal measurement information reported by a wireless terminal whose movement is within a predetermined range, or reported by a wireless terminal whose movement is outside a predetermined range. Whether to place importance on any of the wireless terminal measurement information is set in advance, and when the number of reports of the important wireless terminal measurement information is more than a predetermined ratio than the number of reports of the non-important wireless terminal measurement information, A radio cell is distinguished from radio terminal measurement information reported by a radio terminal whose movement magnitude is within a predetermined range and radio terminal measurement information reported by a radio terminal whose movement magnitude is outside the predetermined range. The wireless parameter control system according to any one of appendix 1 to appendix 6, wherein the radio parameter is determined.
(Supplementary note 8) The radio parameter determination means averages the radio terminal measurement information for each radio terminal according to the magnitude of the movement, and determines the radio parameter of the radio cell according to any one of appendix 1 to appendix 7. Wireless parameter control system.
(Supplementary note 9) The wireless parameter control system according to any one of supplementary note 1 to supplementary note 8, wherein the wireless terminal measurement information includes wireless quality information of a wireless cell detected by the wireless terminal.
(Supplementary note 10) The radio parameter control system according to supplementary note 9, wherein the radio quality information includes at least one of reception power, reception quality, signal-to-interference and noise ratio, and throughput.
(Additional remark 11) The said radio | wireless terminal movement determination means determines whether the magnitude | size of the movement of the said wireless terminal is in a predetermined range based on the said radio | wireless quality information, Radio parameter control of Additional remark 9 or Additional remark 10 system.
(Supplementary Note 12) The wireless terminal movement determination means is configured so that when the fluctuation range of the wireless quality of the wireless cell to which the wireless terminal is connected is smaller than a predetermined threshold, the wireless terminal movement is within a predetermined range. The radio parameter control system according to attachment 11, wherein the radio parameter control system is determined to be within.
(Additional remark 13) The said radio | wireless terminal movement determination means uses both radio | wireless quality of the radio | wireless cell to which the said radio | wireless terminal is connected, and the radio | wireless quality of the radio | wireless cell installed in the place different from the said radio | wireless cell. The wireless parameter control system according to supplementary note 11, wherein when the fluctuation range of quality within a predetermined period is smaller than a predetermined threshold value, the magnitude of movement of the wireless terminal is determined to be within a predetermined range.
(Additional remark 14) The said radio | wireless terminal acquires the movement state information regarding the movement state of a radio | wireless terminal, The movement state information acquisition which includes the acquired said movement state information in the said radio | wireless terminal measurement information, and transmits to a radio | wireless terminal movement determination means. Having means,
The wireless parameter control system according to any one of supplementary note 1 to supplementary note 13, wherein the wireless terminal movement determining means determines whether the magnitude of movement of the wireless terminal is within a predetermined range based on the movement state information. .
(Supplementary note 15) The wireless parameter control system according to supplementary note 14, wherein the movement state information includes at least one of a Doppler frequency, a movement speed of the wireless terminal, and position information of the wireless terminal.
(Supplementary note 16) The radio parameter control apparatus connected to a radio base station that manages the radio cell includes the radio terminal movement determination unit and the radio parameter determination unit, according to any one of supplementary note 1 to supplementary note 15. Wireless parameter control system.
(Supplementary note 17) The radio parameter control system according to any one of supplementary notes 1 to 15, wherein a radio base station that manages the radio cell includes the radio terminal movement determination unit and the radio parameter determination unit.
(Supplementary Note 18) The wireless terminal has the wireless terminal movement determination means,
The radio parameter control according to any one of appendix 1 to appendix 15, wherein either the radio base station that manages the radio cell or a radio parameter control device connected to the radio base station includes the radio parameter determination means. system.
(Supplementary note 19) A radio parameter control apparatus that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
Distinguishing between radio terminal measurement information reported by a radio terminal whose movement magnitude is within a predetermined range and radio terminal measurement information reported by a radio terminal whose movement magnitude is outside the predetermined range, the radio cell A wireless parameter control device having wireless parameter determining means for determining the wireless parameter of
(Supplementary note 20) The wireless parameter determination means is wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, or a wireless terminal whose movement magnitude is outside a predetermined range. Item 20. The radio parameter control apparatus according to appendix 19, wherein the radio parameter of the radio cell is determined with emphasis on one of radio terminal measurement information.
(Additional remark 21) The said radio | wireless parameter determination means weights with respect to the said radio | wireless terminal measurement information which attaches importance, or weights with respect to the said radio | wireless terminal measurement information which does not attach importance, and describes the radio parameter of the said radio | wireless cell. Wireless parameter control device.
(Supplementary note 22) The radio parameter control device according to supplementary note 20 or supplementary note 21, wherein the radio parameter determination means determines radio parameters of the radio cell using only the radio terminal measurement information to be emphasized.
(Additional remark 23) The said radio | wireless parameter determination means is the number of reports of the said important radio | wireless terminal measurement information so that the ratio of the number of reports of the said important radio | wireless terminal measurement information with respect to the number of reports of the non-important radio | wireless terminal measurement information may become high. Alternatively, the radio parameter control device according to appendix 20 or appendix 21, wherein the radio parameter of the radio cell is determined by changing the number of reports of radio terminal measurement information that is not important.
(Supplementary Note 24) When the wireless parameter determination unit determines the wireless parameter by evaluating the communication quality for each wireless terminal measurement information, the wireless terminal measurement that does not place importance on the communication quality of the wireless terminal measurement information to be emphasized The radio parameter control apparatus according to appendix 20 or appendix 21, wherein the evaluation is performed with a weight more than communication quality of information.
(Supplementary Note 25) The wireless parameter determination means reports wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is within a predetermined range, or reported by a wireless terminal whose magnitude of movement is outside a predetermined range. Whether to place importance on any of the wireless terminal measurement information is set in advance, and when the number of reports of the important wireless terminal measurement information is more than a predetermined ratio than the number of reports of the non-important wireless terminal measurement information, A radio cell is distinguished from radio terminal measurement information reported by a radio terminal whose movement magnitude is within a predetermined range and radio terminal measurement information reported by a radio terminal whose movement magnitude is outside the predetermined range. The radio parameter control device according to any one of appendix 19 to appendix 25, wherein the radio parameter is determined.
(Supplementary note 26) The radio parameter determination means according to any one of supplementary notes 19 to 25, wherein the radio terminal measurement information is averaged for each radio terminal according to the magnitude of the movement, and radio parameters of the radio cell are determined. Wireless parameter control device.
(Supplementary note 27) The radio parameter control device according to any one of supplementary note 19 to supplementary note 26, wherein the wireless terminal measurement information includes wireless quality information of a wireless cell detected by the wireless terminal.
(Supplementary note 28) The radio parameter control device according to supplementary note 27, wherein the radio quality information includes at least one of reception power, reception quality, and signal to interference / noise ratio throughput.
(Supplementary note 29) The wireless parameter control device according to any one of supplementary note 19 to supplementary note 28, comprising wireless terminal movement determination means for determining whether or not a movement amount of the wireless terminal is within a predetermined range.
(Additional remark 30) The said radio | wireless terminal movement determination means is a radio | wireless parameter control apparatus of Additional remark 29 which determines whether the magnitude | size of the movement of the said radio | wireless terminal is in a predetermined range based on the said radio | wireless quality information.
(Supplementary Note 31) The wireless terminal movement determination means is configured so that when the fluctuation range of the wireless quality of the wireless cell to which the wireless terminal is connected is smaller than a predetermined threshold, the wireless terminal movement is within a predetermined range. Item 30. The radio parameter control device according to appendix 29, wherein the radio parameter control device is determined to be within.
(Supplementary Note 32) The wireless terminal movement determination means uses both the wireless quality of a wireless cell to which the wireless terminal is connected and the wireless quality of a wireless cell installed at a location different from the wireless cell. 29. The radio parameter control apparatus according to supplementary note 29, wherein the magnitude of movement of the radio terminal is determined to be within a predetermined range when both the fluctuation ranges within the predetermined period of quality are smaller than a predetermined threshold.
(Supplementary Note 33) The wireless terminal movement determination unit determines whether the movement magnitude of the wireless terminal is within a predetermined range based on movement state information regarding the movement state of the wireless terminal acquired by the wireless terminal. The radio parameter control device according to attachment 29.
(Supplementary note 34) The wireless parameter control device according to supplementary note 33, wherein the movement state information includes at least one of a Doppler frequency, a movement speed of the wireless terminal, and position information of the wireless terminal.
(Supplementary Note 35) A radio base station that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
Distinguishing between radio terminal measurement information reported by a radio terminal whose movement magnitude is within a predetermined range and radio terminal measurement information reported by a radio terminal whose movement magnitude is outside the predetermined range, the radio cell A radio base station having radio parameter determination means for determining the radio parameter of
(Supplementary note 36) The wireless base station of Supplementary note 35, comprising wireless terminal movement determination means for determining whether or not the movement magnitude of the wireless terminal is within a predetermined range.
(Supplementary Note 37) A wireless terminal in a wireless communication system that determines wireless parameters of a wireless cell using wireless terminal measurement information measured by the wireless terminal,
Movement state information acquisition means for acquiring movement state information relating to the movement state of the wireless terminal;
A wireless terminal comprising: transmission means for transmitting the wireless terminal measurement information including the movement state information to the wireless base station.
(Supplementary Note 38) A wireless terminal in a wireless communication system that determines wireless parameters of a wireless cell using wireless terminal measurement information measured by the wireless terminal,
A radio having transmission means for transmitting the radio terminal measurement information to the radio base station when the magnitude of the movement is within a predetermined range or when the magnitude of the movement is outside the predetermined range Terminal.
(Supplementary note 39) A radio parameter control method for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
Determining whether the movement of the wireless terminal is within a predetermined range;
Distinguishing between wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is within a predetermined range and wireless terminal measurement information reported by a wireless terminal whose magnitude of movement is outside a predetermined range, A radio parameter control method for determining radio parameters of a radio cell.
(Additional remark 40) The program of the radio | wireless parameter control which determines the radio | wireless parameter of a radio | wireless cell using the radio | wireless terminal measurement information measured with the radio | wireless terminal,
Distinguishing between radio terminal measurement information reported by a radio terminal whose movement magnitude is within a predetermined range and radio terminal measurement information reported by a radio terminal whose movement magnitude is outside the predetermined range, the radio cell A program for executing a process for determining the wireless parameter of the.
Although the present invention has been described above with reference to the embodiments, the present invention is not necessarily limited to the above-described embodiments, and various modifications may be made within the scope of the technical idea. Moreover, you may implement combining each embodiment suitably.
This application claims priority based on Japanese Patent Application No. 2011-271827 filed on Dec. 13, 2011, the entire disclosure of which is incorporated herein.
DESCRIPTION OF SYMBOLS 1 Wireless terminal 2 Wireless terminal movement determination part 3 Wireless parameter determination part 4 Wireless communication network 10 Wireless terminal (UE)
DESCRIPTION OF SYMBOLS 11 Movement state information acquisition part 20 Wireless base station 30 Wireless parameter control apparatus 31 Wireless terminal measurement information database 32 Wireless terminal movement determination part 33 Wireless terminal measurement information totaling part 34 Wireless parameter determination part
A radio parameter control system for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
The wireless parameter determination means includes wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, or wireless terminal measurement information reported by a wireless terminal whose movement magnitude is outside the predetermined range. The radio parameter control system according to claim 1, wherein the radio parameter of the radio cell is determined with emphasis on any of the above.
3. The radio parameter according to claim 2, wherein the radio parameter determination unit weights the radio terminal measurement information to be emphasized or weights the radio terminal measurement information not to be important and determines radio parameters of the radio cell. Control system.
The radio parameter control system according to claim 2 or 3, wherein the radio parameter determination unit determines radio parameters of the radio cell using only the radio terminal measurement information to be emphasized.
The radio parameter determination means is configured to increase the ratio of the number of reports of the emphasized radio terminal measurement information with respect to the number of reports of the radio terminal measurement information not emphasized, or the number of reports of the emphasized radio terminal measurement information or the non-importance The radio parameter control system according to claim 2 or 3, wherein the radio parameter of the radio cell is determined by changing the number of reports of radio terminal measurement information.
The wireless parameter determination means determines the communication quality of the wireless terminal measurement information to be emphasized when the wireless parameter is determined by evaluating the communication quality for each wireless terminal measurement information. The wireless parameter control system according to claim 2 or 3, wherein the evaluation is performed with a more weighted evaluation.
The wireless parameter determination means is wireless terminal measurement information reported by a wireless terminal whose movement is within a predetermined range, or wireless terminal measurement information reported by a wireless terminal whose movement is outside a predetermined range. Is determined in advance, and the number of reports of the radio terminal measurement information to be emphasized is larger than the number of reports of the radio terminal measurement information not to be emphasized by a predetermined ratio or more, the magnitude of the movement Radio terminal measurement information reported by a radio terminal whose length is within a predetermined range and radio terminal measurement information reported by a radio terminal whose magnitude of movement is out of the predetermined range The radio parameter control system according to any one of claims 1 to 6, wherein the determination is performed.
8. The radio according to claim 1, wherein the radio parameter determination unit averages radio terminal measurement information for each radio terminal according to the magnitude of the movement, and determines a radio parameter of the radio cell. 9. Parameter control system.
The radio parameter control system according to claim 1, wherein the radio terminal measurement information includes radio quality information of a radio cell detected by the radio terminal.
The radio parameter control system according to claim 9, wherein the radio quality information includes at least one of reception power, reception quality, signal-to-interference and noise ratio, and throughput.
The radio parameter control system according to claim 9 or 10, wherein the radio terminal movement determination unit determines whether the magnitude of movement of the radio terminal is within a predetermined range based on the radio quality information.
The wireless terminal movement determining means may determine that the movement size of the wireless terminal is within a predetermined range when the fluctuation range of the wireless quality of the wireless cell to which the wireless terminal is connected is smaller than a predetermined threshold. The radio parameter control system according to claim 11 for determination.
The wireless terminal movement determination means uses a wireless quality of a wireless cell to which the wireless terminal is connected and a wireless quality of a wireless cell installed at a location different from the wireless cell, and a predetermined period of both wireless qualities. The radio parameter control system according to claim 11, wherein the magnitude of movement of the radio terminal is determined to be within a predetermined range when both of the fluctuation ranges are smaller than a predetermined threshold.
The wireless terminal has movement state information acquisition means for acquiring movement state information relating to a movement state of the wireless terminal, and including the acquired movement state information in the wireless terminal measurement information and transmitting the movement state information to a wireless terminal movement determination means. ,
The wireless parameter according to any one of claims 1 to 13, wherein the wireless terminal movement determination unit determines whether the movement magnitude of the wireless terminal is within a predetermined range based on the movement state information. Control system.
The radio parameter control system according to claim 14, wherein the movement state information includes at least one of a Doppler frequency, a moving speed of the wireless terminal, and position information of the wireless terminal.
The radio parameter according to any one of claims 1 to 15, wherein a radio parameter control device connected to a radio base station that manages the radio cell includes the radio terminal movement determination unit and the radio parameter determination unit. Control system.
The radio parameter control system according to any one of claims 1 to 15, wherein a radio base station that manages the radio cell includes the radio terminal movement determination unit and the radio parameter determination unit.
The wireless terminal has the wireless terminal movement determination means;
The radio according to any one of claims 1 to 15, wherein either a radio base station that manages the radio cell or a radio parameter control device connected to the radio base station includes the radio parameter determination means. Parameter control system.
A radio parameter control apparatus that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
The wireless parameter determination means includes wireless terminal measurement information reported by a wireless terminal whose movement magnitude is within a predetermined range, or wireless terminal measurement information reported by a wireless terminal whose movement magnitude is outside the predetermined range. The radio parameter control apparatus according to claim 19, wherein the radio parameter of the radio cell is determined with emphasis on any of the above.
21. The radio parameter according to claim 20, wherein the radio parameter determination unit weights the radio terminal measurement information to be emphasized or weights the radio terminal measurement information not to be important and determines radio parameters of the radio cell. Control device.
The radio parameter control apparatus according to claim 20 or 21, wherein the radio parameter determination unit determines radio parameters of the radio cell using only the radio terminal measurement information to be emphasized.
The radio parameter determination means is configured to increase the ratio of the number of reports of the emphasized radio terminal measurement information with respect to the number of reports of the radio terminal measurement information not emphasized, or the number of reports of the emphasized radio terminal measurement information or the non-importance The radio parameter control device according to claim 20 or 21, wherein the radio parameter of the radio cell is determined by changing the number of reports of radio terminal measurement information.
The wireless parameter determination means determines the communication quality of the wireless terminal measurement information to be emphasized when the wireless parameter is determined by evaluating the communication quality for each wireless terminal measurement information. The radio parameter control apparatus according to claim 20 or 21, wherein the evaluation is performed with a more weighted evaluation.
The wireless parameter determination means is wireless terminal measurement information reported by a wireless terminal whose movement is within a predetermined range, or wireless terminal measurement information reported by a wireless terminal whose movement is outside a predetermined range. Is determined in advance, and the number of reports of the radio terminal measurement information to be emphasized is larger than the number of reports of the radio terminal measurement information not to be emphasized by a predetermined ratio or more, the magnitude of the movement Radio terminal measurement information reported by a radio terminal whose length is within a predetermined range and radio terminal measurement information reported by a radio terminal whose magnitude of movement is out of the predetermined range The radio parameter control device according to any one of claims 19 to 25, wherein the determination is performed.
26. The radio according to any one of claims 19 to 25, wherein the radio parameter determination means averages radio terminal measurement information for each radio terminal according to the magnitude of the movement and determines radio parameters of the radio cell. Parameter control device.
The radio parameter control device according to any one of claims 19 to 26, wherein the radio terminal measurement information includes radio quality information of a radio cell detected by a radio terminal.
The radio parameter control apparatus according to claim 27, wherein the radio quality information includes at least one of reception power, reception quality, and signal-to-interference / noise ratio throughput.
The radio parameter control apparatus according to any one of claims 19 to 28, further comprising: a radio terminal movement determining unit that determines whether the magnitude of movement of the radio terminal is within a predetermined range.
30. The radio parameter control apparatus according to claim 29, wherein the radio terminal movement determination unit determines whether the magnitude of movement of the radio terminal is within a predetermined range based on the radio quality information.
The wireless terminal movement determining means may determine that the movement size of the wireless terminal is within a predetermined range when the fluctuation range of the wireless quality of the wireless cell to which the wireless terminal is connected is smaller than a predetermined threshold. 30. The wireless parameter control device according to claim 29, wherein the determination is made.
The wireless terminal movement determination means uses a wireless quality of a wireless cell to which the wireless terminal is connected and a wireless quality of a wireless cell installed at a location different from the wireless cell, and a predetermined period of both wireless qualities. 30. The radio parameter control apparatus according to claim 29, wherein when both of the fluctuation ranges are smaller than a predetermined threshold, it is determined that the magnitude of movement of the radio terminal is within a predetermined range.
The wireless terminal movement determination means determines whether the magnitude of movement of the wireless terminal is within a predetermined range based on movement state information regarding the movement state of the wireless terminal acquired by the wireless terminal. The wireless parameter control device described.
The radio parameter control device according to claim 33, wherein the movement state information includes at least one of a Doppler frequency, a moving speed of the wireless terminal, and position information of the wireless terminal.
A radio base station that determines radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
36. The radio base station according to claim 35, further comprising radio terminal movement determination means for determining whether the magnitude of movement of the radio terminal is within a predetermined range.
A wireless terminal in a wireless communication system that determines wireless parameters of a wireless cell using wireless terminal measurement information measured by the wireless terminal,
A radio parameter control method for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
A radio parameter control program for determining radio parameters of a radio cell using radio terminal measurement information measured by a radio terminal,
PCT/JP2012/081922 2011-12-13 2012-12-10 Wireless parameter control system, wireless parameter control device, wireless base station, wireless terminals, wireless parameter control method and program WO2013089057A1 (en)
JP2013549250A JP6191823B2 (en) 2011-12-13 2012-12-10 Radio parameter control system, radio parameter control apparatus, radio base station, radio terminal, radio parameter control method and program
EP12857690.7A EP2793501B1 (en) 2011-12-13 2012-12-10 Radio parameter control based on measurement information reported from radio terminal with a movement range within a predetermined range
US14/365,037 US20140302857A1 (en) 2011-12-13 2012-12-10 Radio parameter control system, radio parameter control apparatus, radio base station, radio terminal, radio parameter control method and program
RU2014128573/07A RU2583047C1 (en) 2011-12-13 2012-12-10 Radio parameters control system, control of the radio, radio base station, radio, control method of the radio and program
WO2013089057A1 true WO2013089057A1 (en) 2013-06-20
JP2006005597A (en) * 2004-06-17 2006-01-05 Sharp Corp System and terminal for mobile communication
JP2007288676A (en) * 2006-04-19 2007-11-01 Ntt Docomo Inc Wireless base station and transmission control method
WO2009047972A1 (en) 2007-10-09 2009-04-16 Nec Corporation Wireless communication system, wireless communication method, base station, method for controlling base station, and control program of base station
WO2009057544A1 (en) * 2007-10-31 2009-05-07 Mitsubishi Electric Corporation Mobile communication system, base station, mobile station, and base station installation method
JP2010021647A (en) * 2008-07-08 2010-01-28 Fujitsu Ltd Mobile station and base station
WO2010055721A1 (en) * 2008-11-14 2010-05-20 日本電気株式会社 Radio communication network quality monitoring system, quality monitoring device, and quality monitoring method
JPWO2009011065A1 (en) * 2007-07-19 2010-09-16 パナソニック株式会社 Wireless communication area state measurement system, wireless communication area state measurement method, and base station
JP4929192B2 (en) * 2008-01-21 2012-05-09 株式会社日立製作所 Wireless communication system and soft handoff control method in wireless communication system
WO2011083800A1 (en) * 2010-01-07 2011-07-14 日本電気株式会社 Wireless communication system, radio terminal, radio network, wireless communication method and program
US9363723B2 (en) * 2013-11-05 2016-06-07 At&T Mobility Ii Llc Non-persistent heterogeneous neighbors
See also references of EP2793501A4 *
US20140302857A1 (en) 2014-10-09
KR100985313B1 (en) 2010-10-04 System and method for determining when to exit an existing wireless communications coverage network
US7224972B2 (en) 2007-05-29 Blind handover technique
TW201238267A (en) 2012-09-16 Method of UE RSRQ measurement precuation and UE
CN1559112A (en) 2004-12-29 Pilot channel power autotuning
JPWO2006011337A1 (en) 2008-05-01 The method of uplink radio resource controller, a base station apparatus, and a radio network controller
CN103262595B (en) 2016-09-07 Radio parameter control method, a base station, radio parameters and the control non-transitory computer-readable medium
Ref document number: 12857690
Ref document number: 2013549250
Ref document number: 14365037
Ref document number: 2012857690
Ref document number: 2014128573