1. Filtering network in HR-Si silicon technology defined by at least one cut-off frequency and comprising:
an input terminal to receive the signal to be filtered and an output terminal to provide a filtered signal,
a first ground line is connected by its ends to first and second ground points, a second ground line is connected via its ends to third and fourth ground points, a plurality of LC resonant elements are connected in parallel and being linked via one end to one of the two ground lines and via the other end, between them, by means of coupling inductors thus creating transmission zeros, wherein
each ground line forming inductive elements the network comprises capacitive elements in series with at least some of said inductive elements, the value of capacitive elements being selected so that the resonant frequency of inductive and capacitive elements in series corresponds to a frequency lying outside of the bandwidth.
2. Filtering network according to claim 1, wherein the capacitive elements, are capacities connected to the ground points.
3. Filtering network according to claim 1, wherein the capacitive element is integrated with the capacity of a resonant element, modifying the value.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, a mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the handover processing method comprising a step of:
providing, by the access point, strength information held by the access point itself, the strength information that is information promoting a handover processing in a layer 3 or information not promoting the handover processing in the layer 3; and
receiving, by the mobile node, the provided strength information, deciding whether to perform a handover in the layer 3 based on the received strength information, and performing the handover processing in the layer 3 based on the decision.
2. The handover processing method according to claim 1, wherein the access point provides the strength information in response to a request from the mobile node.
3. The handover processing method according to claim 1, wherein:
the mobile node, after the connection to the access point is switched, transmits to an access point the strength information at the access point before the switch and prefix information assigned to an access router to which the access point is connected; and
the access point generates new strength information based on the received strength information and prefix information.
4. The handover processing method according to claim 3, wherein a timing at which the strength information and the prefix information are transmitted is indicated by the access router.
5. The handover processing method according to claim 1, wherein the strength information is information set in advance.
6 A handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, a mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the handover processing method comprising a step of:
receiving, by the mobile node, a predetermined message transmitted from an external source, deciding whether to perform a handover in a layer 3 based on a number of predetermined messages received, and performing handover processing in the layer 3 based on the decision.
7. A handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, a mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the handover processing method comprising a step of:
receiving, by the mobile node, a predetermined message transmitted from an external source and, when the received predetermined message includes a predetermined piece of information, making an acquisition request to a predetermined server for acquiring strength information serving as a judgment basis for a handover processing in a layer 3;
transmitting, by the predetermined server, the strength information to the mobile node in response to the acquisition request; and
deciding, by the mobile node, whether to perform a handover in the layer 3 based on the strength information, and performing the handover processing in the layer 3 based on the decision.
8. A handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, a mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the handover processing method comprising a step of:
providing, by a control terminal controlling the communication network, strength information that is information promoting a handover processing in a layer 3 or information not promoting the handover processing in the layer 3; and
receiving, by the mobile node, the provided strength information, deciding whether to perform a handover in the layer 3 based on the received strength information, and performing the handover processing in the layer 3 based on the decision.
9. An access point in a handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, a mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the access point comprising:
a storage means for storing therein strength information that is information promoting a handover processing in a layer 3 or information not promoting the handover processing in the layer 3; and
a providing means for providing the stored strength information.
10. The access point according to claim 9, wherein the providing means provides the strength information in response to a request from the mobile node.
11. The access point according to claim 9, further comprising:
a receiving means for receiving from the mobile node, after the connection to the access point is switched, the strength information at the access point before switching and prefix information assigned to an access router to which the access point is connected; and
a generating means for generating new strength information based on the received strength information and prefix information.
12. The access point according to claim 11, wherein a timing at which the strength information and the prefix information are transmitted is indicated by the access router.
13. The access point according to claim 9, wherein the strength information is information set in advance.
14. A mobile node in a handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, the mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the mobile node comprising:
a receiving means for receiving strength information provided by the access point and held by the access point, the strength information that is information promoting a handover processing in a layer 3 or information not promoting the handover processing in the layer 3;
a deciding means for deciding whether to perform a handover in the layer 3 based on the received strength information; and
a controlling means for performing the handover processing in the layer 3 based on the decision.
15. The mobile node according to claim 14, wherein the controlling means requests that the access point provides the strength information.
16. The mobile node according to claim 14, further comprising:
a transmitting means for transmitting to the access point, after the connection to the access point is switched, the strength information at the access point before switching and prefix information assigned to an access router to which the access point is connected.
17. The mobile node according to claim 16, wherein a timing at which the strength information and the prefix information are transmitted is indicated by the access router.
18. The mobile node according to claim 14, wherein the strength information is set in advance.
19. A mobile node in a handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, the mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the mobile node comprising:
a receiving means for receiving a predetermined message transmitted from an external source;
a deciding means for deciding whether to perform a handover in a layer 3, based on a number of predetermined messages received; and
a controlling means for performing handover processing in the layer 3 based on the decision.
20. A mobile node in a handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, the mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the mobile node comprising:
a receiving means for receiving a predetermined message transmitted form an external source;
a transmitting means for, when the received predetermined message includes a predetermined piece of information, making an acquisition request to a predetermined server for acquiring strength information serving as a judgment basis for a handover processing in a layer 3;
a deciding means for deciding whether to perform a handover in the layer 3 based on the strength information from the predetermined server; and
a controlling means for performing the handover processing in the layer 3 based on the decision.
21. A mobile node in a handover processing method in which, in a communication system in which a plurality of access routers each configuring a subnet are connected via a communication network, at least one or more access points providing unique communication areas are connected to each of the plurality of access routers, and respective subnets of the plurality of access routers are configured to overlap with one another, the mobile node, configured to communicate with a correspondent node through wireless access with the access point within the communication area, switches connection from an access point with which communication is currently being performed to another access point as a result of movement, the mobile node comprising:
a receiving means that receives strength information provided by a control terminal controlling the communication network, the strength information that is information promoting a handover processing in a layer 3 or information not promoting the handover processing in the layer 3;
a deciding means that decides whether to perform a handover in the layer 3 based on the received strength information; and
a controlling means that performs the handover processing in the layer 3 based on the decision.
22. A handover processing method used when, in a communication network configured such that networks with different properties overlap, a mobile node switches connection from a network to which the mobile node currently belongs to another network having different properties as a result of movement, the handover processing method comprising a step of:
receiving, by the mobile node, information from an edge terminal positioned on an edge of the network to which the mobile node currently belongs, the information stating that the edge terminal is positioned at the edge of the network to which the mobile node currently belongs; and
deciding, by the mobile node, whether to perform a handover based on the received information, and performing processing of the handover based on the decision.