Abstract: A method is disclosed for optimizing packet transmission paths in a mobile communication network (400) in which packets are transmitted and received between mobile stations (10-14) or between a mobile station and a fixed network (120) by way of a plurality of packet transmission device (60-64, 70-72, 80, and 81) and radio base stations (50-57). When a mobile station uses a service that is provided by a fixed network (300), imposed are applied on the packet transmission path such that packets pass by way of specific packet transmission devices (80 and 81) depending on the fixed network (external network) 300. When the mobile station uses a service that is provided by the mobile communication network (400), on the other hand, no restrictions are imposed on the packet transmission path, and the packet transmission path is thus set such that the link costs are a minimum.

Abstract: A image processing apparatus according to an aspect of the present invention includes: determination unit 131 that determines a first region based on an occurrence position where a phenomenon is estimated to occur in an image; and setting unit 132 that sets a first condition in which the first region is encoded, and a second condition in which a second region included in the image and being a region other than the first region is encoded in such a way that the first region enhances image quality as compared with the second region.

Abstract: A method is disclosed for optimizing packet transmission paths in a mobile communication network (400) in which packets are transmitted and received between mobile stations (10-14) or between a mobile station and a fixed network (120) by way of a plurality of packet transmission device (60-64, 70-72, 80, and 81) and radio base stations (50-57). When a mobile station uses a service that is provided by a fixed network (300), imposed are applied on the packet transmission path such that packets pass by way of specific packet transmission devices (80 and 81) depending on the fixed network (external network) 300. When the mobile station uses a service that is provided by the mobile communication network (400), on the other hand, no restrictions are imposed on the packet transmission path, and the packet transmission path is thus set such that the link costs are a minimum.

Abstract: A method is disclosed for optimizing packet transmission paths in a mobile communication network (400) in which packets are transmitted and received between mobile stations (10-14) or between a mobile station and a fixed network (120) by way of a plurality of packet transmission device (60-64, 70-72, 80, and 81) and radio base stations (50-57). When a mobile station uses a service that is provided by a fixed network (300), imposed are applied on the packet transmission path such that packets pass by way of specific packet transmission devices (80 and 81) depending on the fixed network (external network) 300. When the mobile station uses a service that is provided by the mobile communication network (400), on the other hand, no restrictions are imposed on the packet transmission path, and the packet transmission path is thus set such that the link costs are a minimum.

Abstract: A method is disclosed for optimizing packet transmission paths in a mobile communication network (400) in which packets are transmitted and received between mobile stations (10-14) or between a mobile station and a fixed network (120) by way of a plurality of packet transmission device (60-64, 70-72, 80, and 81) and radio base stations (50-57). When a mobile station uses a service that is provided by a fixed network (300), imposed are applied on the packet transmission path such that packets pass by way of specific packet transmission devices (80 and 81) depending on the fixed network (external network) 300. When the mobile station uses a service that is provided by the mobile communication network (400), on the other hand, no restrictions are imposed on the packet transmission path, and the packet transmission path is thus set such that the link costs are a minimum.

Abstract: A method is disclosed for optimizing packet transmission paths in a mobile communication network (400) in which packets are transmitted and received between mobile stations (10-14) or between a mobile station and a fixed network (120) by way of a plurality of packet transmission device (60-64, 70-72, 80, and 81) and radio base stations (50-57). When a mobile station uses a service that is provided by a fixed network (300), imposed are applied on the packet transmission path such that packets pass by way of specific packet transmission devices (80 and 81) depending on the fixed network (external network) 300. When the mobile station uses a service that is provided by the mobile communication network (400), on the other hand, no restrictions are imposed on the packet transmission path, and the packet transmission path is thus set such that the link costs are a minimum.

Abstract: [Problem] To provide a wireless base station, a traffic load-balancing method, and a traffic load-balancing program that make it possible to more reliably avoid backhaul congestion and decreases in wireless-terminal throughput. [Solution] This wireless base station includes the following: a setting unit (14) that sets network load information that indicates the traffic load on a backhaul between the wireless base station and a core network; and an execution unit (15) that, on the basis of the network load information set by the setting unit and network load information received from a neighboring wireless base station, executes a process that balances the traffic load between the wireless base stations.

Abstract: A radio control system capable of avoiding decrease in a throughput of a macro base station and a micro base station or suppress interference in the micro base station is provided. The radio control system includes a macro base station 101 forming a macro cell 103 and a micro base station 102 forming a picocell 105 included in the macro cell 103. Further, the radio control system includes a communication quality detection unit 111 detecting a communication quality between the micro base station 102 and a communication terminal present in the picocell 105, and a management apparatus 110 controlling a ratio of a radio resource where data transmission is limited in the first base station, based on the communication quality.

Abstract: A handover failure detection device (121) detects at least one of handover failure types regarding outgoing handover from a first cell (131) managed by a first base station (111) by observing: (a) presence/absence of reception by the first base station (111) of an acknowledgment response to a handover command regarding first handover of a mobile terminal (101) from the first cell (131) to a second cell (132) managed by a second base station (112); and (b) presence/absence of a request for connection re-establishment from the mobile terminal (101) to the first cell (131), the request occurring after initiation of the first handover. As a result, it contributes to improvement of handover failure detection or reduction of handover failure in a situation where exchange of information between base stations is restricted.

Abstract: A radio communication system and a handover control method are provided that can reduce abnormal disconnections of communication attributable to handover to from another cell an own cell. Provided are a handover suppression section (102) that, when receiving from a base station (30A) managing a first cell (35A) a request for handover to a second cell (35B), suppresses the handover in accordance with the degree of handover suppression, a handover failure detection section (13) that detects a handover failure caused by the handover suppression, and a handover suppression optimization section (203) that adjusts the degree of handover suppression based on the rate of handover failure occurrence.

Abstract: An apparatus (10) used in a Self-Organizing Network (SON) includes a SON execution unit (101) and an exclusion processing unit (105). The SON execution unit (101) executes a SON operation on a first cell (40), a second cell (41) or a neighboring cell pair (40 and 41), the SON operation including repeatedly adjusting a configuration parameter that affects an operation of a base station (20) or a mobile station (30) to achieve an optimization objective. The exclusion processing unit (105) excludes the first cell (40), the second cell (41) or the neighboring cell pair (40 and 41) from a future SON operation by the SON execution unit (101), if achievement status of the optimization objective after completion of the SON operation by the SON execution unit (101) does not satisfy a predetermined reference level. This can contribute to suppression of execution of SON operation providing only little performance improvement.

Abstract: It is an object of the present invention to provide a communication system that makes it possible to designate, from among a plurality of first network nodes managed by a management device, a first network node that will acquire operation information on a second network node managed by another management device. A communication system according to the present exemplary embodiment includes a plurality of first network nodes, a management device managing the plurality of first network nodes, and a second network node managed by another management device different from the management device, wherein the management device selects, from among the plurality of first network nodes, a designated network node that will acquire operation information on the second network node, and the designated network node acquires operation information from the second network node and transmits the operation information to the management device.

Abstract: Disclosed is a communication system in which information about the number of active users in each cell can be shared between base stations. A communication system according to the present exemplary embodiment includes a first base station controlling a first cell and a second base station connected to the first base station through an inter-base-station interface, wherein the first base station transmits operation information on the first cell to the second base station through the inter-base-station interface, wherein the operation information on the first cell includes information about a load on the first cell and information about the number of active users in the first cell.

Abstract: [Problem] To provide a communication system, a radio base station, a traffic load distribution method and a traffic load distribution program whereby backhaul congestions can be avoided and degradation of the throughputs of terminals can be avoided. [Solution] A management control apparatus (20) comprising: a first communication unit (21) that collects, from relay apparatuses, backhaul resource load information indicating the traffic loads of the links in the backhaul between a core network and radio base stations (10-1 to 10-n); a calculation unit (22) that extracts, on the basis of the backhaul resource load information, the bottleneck link the load of which is the highest among those of the links for each radio base station; and a second communication unit (23) that transmits the backhaul resource load information of the bottleneck links to the radio base stations.

Abstract: [Problem] To provide a wireless base station, a traffic load-balancing method, and a traffic load-balancing program that make it possible to more reliably avoid backhaul congestion and decreases in wireless-terminal throughput. [Solution] This wireless base station includes the following: a setting unit (14) that sets network load information that indicates the traffic load on a backhaul between the wireless base station and a core network; and an execution unit (15) that, on the basis of the network load information set by the setting unit and network load information received from a neighboring wireless base station, executes a process that balances the traffic load between the wireless base stations.

Abstract: A radio parameter control apparatus decides a radio parameter from which a throughput of UE is improved. A radio parameter control apparatus includes: a radio quality prediction unit (12) that predicts radio quality of a radio terminal due to change of a radio parameter of a radio cell; a resource-allocated number-of-communications prediction unit (13) that predicts the number of communications considered as allocation targets of radio resources in a radio cell due to the change of the radio parameter; a communication quality prediction unit (14) that predicts communication quality due to the change of the radio parameter based on a prediction result of the radio quality and a prediction result of the number of communications; and a radio parameter decision unit (15) that decides a radio parameter by which improvement of communication quality is predicted based on the predicted communication quality.

Abstract: In order to allow a plurality of MNOs to share at least two of a radio access network (RAN) (100), a mobile backhaul network (MBH) (200), and a core network (CN) (300), a network control system (500) operates to enforce a network resource configuration to each of the at least two networks to be shared out of the RAN (100), the MBH (200), and the CN (300) in accordance with common resource partitioning information indicating slicing of network resources among the plurality of MNOs. It is thus possible to contribute to improving the efficiency of performing setting of network resource allocation on the at least two networks to be shared.

Abstract: A radio control system capable of avoiding decrease in a throughput of a macro base station and a micro base station or suppress interference in the micro base station is provided. The radio control system includes a macro base station 101 forming a macro cell 103 and a micro base station 102 forming a picocell 105 included in the macro cell 103. Further, the radio control system includes a communication quality detection unit 111 detecting a communication quality between the micro base station 102 and a communication terminal present in the picocell 105, and a management apparatus 110 controlling a ratio of a radio resource where data transmission is limited in the first base station, based on the communication quality.

Abstract: An apparatus (10) used in a Self-Organizing Network (SON) includes a SON execution unit (101) and an exclusion processing unit (105). The SON execution unit (101) executes a SON operation on a first cell (40), a second cell (41) or a neighboring cell pair (40 and 41), the SON operation including repeatedly adjusting a configuration parameter that affects an operation of a base station (20) or a mobile station (30) to achieve an optimization objective. The exclusion processing unit (105) excludes the first cell (40), the second cell (41) or the neighboring cell pair (40 and 41) from a future SON operation by the SON execution unit (101), if achievement status of the optimization objective after completion of the SON operation by the SON execution unit (101) does not satisfy a predetermined reference level. This can contribute to suppression of execution of SON operation providing only little performance improvement.

Abstract: Communication apparatus in a wireless communication system and handover control method in the same are provided that enable handover information to be notified to the source side of a handover regardless of the types of UEs. When a communication apparatus (20) managed by an upper-level network (30) has established a connection with a terminal (40) during handover operation of the terminal (40), the communication apparatus (20) sets information about the handover of the terminal in a handover complete message and sends it to the upper-level network (30), and a source-side communication apparatus (10) acquires the handover information from a handover success notice from the upper-level network.