摘要:
To provide a propagation environment notification method in radio communication allowing a user to easily understand radio propagation environment information. When receiving a service start command C1 from a user terminal 100, a server 102 transfers software for clients to the user terminal 100 (C2). The user terminal 100 starts the transferred software for clients, and a user condition inputting process P2 is carried out to collect user specific information and radio base station information and transfer the same to the server 102 (C3). When receiving the information, the server 102 starts a distribution information generating process P1 for generating radio propagation environment information based on the information, and the generated information is transferred to the user terminal 100 (C4), and is converted into a format convenient for the user by the software for clients transferred on the user terminal 100, and displayed on the user terminal 100 (P3).
摘要:
An object of the invention is to obtain a high-speed and high-accuracy radio-wave propagation characteristic forecasting system in combination with the launching method by correctly estimating a diffraction phenomenon when a ray passes the vicinity of an edge of a structure. To estimate a radio-wave propagation characteristic in accordance with the ray launching method, when a ray passes the vicinity of an edge of a structure, a diffracted wave is generated at the edge if the distance between the edge and the ray is smaller than the radius of a ray spread. Thereby, it is easy to combine the ray launching method with the conventional ray launching method and it is possible to estimate a high-speed high-accuracy radio-wave propagation characteristic also considering a ray diffracted wave.
摘要:
To shorten a required estimation time while keeping an estimation precision in an object environment given for estimating propagation characteristics with a ray launching method. In the case where a ray is propagated within a given observation area, and collides with a barrier residing on its path, a space in the vicinity of the ray is divided into a plurality of partial spaces until a predetermined condition is satisfied. The space in the vicinity of the ray that is considered to cause a degradation in the estimation precision is divided in reflection until there is less influence of degradation, whereby each of the subdivided partial spaces can be handled individually, so that the estimation precision of radio wave propagation characteristics can be made better than a conventional method. On the other hand, in the case where there is possibly less influence of degradation in the estimation precision, the space is not divided, whereby if a ray is radiated from a transmitting antenna coarsely, the total number of rays is reduced below that of the conventional method, so that a total calculation time taken for a propagation estimation can be shortened.
摘要:
An object of the present invention provides a method of predicting radio wave propagation characteristics that can implement a ray launching technique at higher speed. A plurality of Central Processing Units (CPUs) are interconnected via a network, and a recording device that can be read or written from all the CPUs is installed, and plural rays radiated from a predetermined transmitting point are divided into a plurality of groups, each group being assigned to a different CPU, whereby the CPUs perform a ray launching processing for the assigned rays independently and simultaneously to predict the radio wave propagation characteristics. The plural rays radiated from the transmitting point are divided and assigned to the CPUs, and the ray launching processing is performed simultaneously, resulting in a shorter computation time.
摘要:
An object of the present invention is to provide a method for detecting a shield in predicting the radio wave propagation characteristics by a technique of the geometrical optics capable of detecting a content which a ray strikes, at high rate, when the ray is radiated within the observation space. In the case where the rays and the contents are given, the projected objects given by the line or plane are set up, and if an image of the content projected onto the projected object and an image of the ray projected onto the projected object do not intersect, the content is excluded from the shield detection object. A plurality of projected objects i (i=1 to M) are prepared, the selection of shield detection object is performed for each projected object i in order for i=1 to M, and the content of the shield detection object is concluded in sequence. Though the conventional method required the multiple variable equations to be solved for all the contents within the observation area, this invention allows the multiple variable equations to be solved only for the concluded contents of the shield detection object. Hence, the processing time can be shortened.
摘要:
An object of the invention is to obtain a high-speed and high-accuracy radio-wave propagation characteristic forecasting system in combination with the launching method by correctly estimating a diffraction phenomenon when a ray passes the vicinity of an edge of a structure. To estimate a radio-wave propagation characteristic in accordance with the ray launching method, when a ray passes the vicinity of an edge of a structure, a diffracted wave is generated at the edge if the distance between the edge and the ray is smaller than the radius of a ray spread. Thereby, it is easy to combine the ray launching method with the conventional ray launching method and it is possible to estimate a high-speed high-accuracy radio-wave propagation characteristic also considering a ray diffracted wave.
摘要:
A vehicle braking control device includes a braking force simultaneous control mode executing unit capable of executing a braking force simultaneous control mode for simultaneously controlling right/left wheels cylinders by a brake hydraulic pressure circuit according to slip ratios of right/left wheels, a braking force independent control mode executing unit capable of executing a braking force independent control mode for independently controlling the right/left wheels cylinders, and a switching controller capable of switching the braking force simultaneous control mode and the braking force independent control mode, wherein the switching controller switches to the braking force independent control mode at the time a slip ratio difference of the right/left rear wheels becomes equal to or less than a preset and predetermined value during switching from the braking force simultaneous control mode to the braking force independent control mode.
摘要:
A neighbor cell list optimizing system according to the present invention is a neighbor cell list optimizing system that updates a neighbor cell list that is provided in a base station that manages a cell to which a mobile terminal establishes a connection and to which specific neighbor cells that are candidates of a handover destination cell for said mobile terminal of neighbor cells that are in the vicinity of said cell are registered, comprising: priority computation section that computes priorities of said neighbor cells to be registered to said neighbor cell list based on measurement information that represents radio communication qualities of neighbor cells in which the measured radio communication qualities exceed a threshold; and neighbor cell list updating section that registers neighbor cells in descending order of the priorities up to an upper limit of radio cells that can be registered to said neighbor cell list.
摘要:
A network management system includes: wireless link quality information collection means for collecting, from a mobile terminal that is connected to the mobile communication network, wireless link quality information that indicates wireless link quality measured by the mobile terminal, the wireless link quality information containing information about quality of wireless links between the mobile terminal and two or more wireless cells; coverage evaluation means for evaluating the wireless cell coverage on the basis of wireless link quality information calculated for each of the wireless cells using the wireless link quality information collected by the wireless link quality information collection means; and wireless parameter calculation means for calculating an amount of change in changing for a wireless parameter of a wireless base station on the basis of the result of the evaluation provided by the coverage evaluation means.
摘要:
The present invention is to provide meiosis-specific novel kinetochore protein Sgo1 (shugoshin) derived from fission yeast Schizosaccharomyces pombe, and a homologue or paralogue thereof having a regulatory activity of chromosome segregation; and DNAs encoding them; as a factor ensuring the retention of unidirection and cohesion in sister centromere at meiosis I in cooperation with cohesin. To elucidate the proteins protecting Rec8 during anaphase, the present inventor screened in fission yeast genes for a gene that inhibits mitotic growth and prevents sister chromatid from the separation at anaphase, when co-expressed with Rec8. In this approach, meiosis-specific protein Sgo1 that protects (Shugo) centromeric Rec8 from the degradation at anaphase I was indentified. Further, a budding yeast Sgo1 homologue and a fission yeast mitotic paralogue Sgo2 were identified.