1. A self-supported optical correlator, comprising:
a first holder having two opposite ends, one of said opposite ends being provided with anchor points, the other of said opposite ends being provided with a light source;
a second holder having two opposite ends, one of said opposite ends being provided with anchor points, the other of said opposite ends being provided with a light receiving element,
a plurality of intermediary holders, each having two opposite ends, each of said holders being provided with anchor points at each opposite end, at least one of said intermediary holders being provided with a spatial light modulator for projecting an image and another of said intermediary holders being provided with another spatial light modulator for projecting a filter,
each of said intermediary holders being provided with optical components, said optical components being secured within said holders,
said anchor points being adapted to secure said first, second and intermediary holders together linearly end to end;
wherein, when said intermediary holders are assembled end to end, and said first holder is assembled at one extremity and said other holder is assembled at another extremity, said
resulting assembly forms said optical correlator.
2. A self-supported optical correlator according to claim 1, wherein each of said first, second and intermediary holders have an opaque outer surface, and a hollow inside, said inside defining a longitudinal optical axis.
3. A self-supported optical correlator according to claim 2, wherein said of said first, second and intermediary holders and said optical components are toleranced.
4. A self-supported optical correlator according to claim 2, wherein said optical correlator is mechanically insulated from environmental vibration.
5. A self-supported optical correlator according to claim 2, wherein connections at said anchor points further include thermal connections.
6. A self-supported optical correlator according to claim 2, wherein said first, second and intermediary holders are tubular.
7. A self-supported optical correlator according to claim 2, wherein said optical correlator is adapted to be laterally stacked.
8. A self-supported optical correlator according to claim 2, further comprising a control unit, said control unit introducing a tag in an image and in a filter, so that when an optical correlator electronic driver receives an image-filter pair, said tag is extracted in order to ensure correlation between said filter and said image.
9. A self-supported optical correlator according to claim 2, wherein said correlator uses two look-up tables applied to an image and a filter, a first look-up table being of normal polarity and a second look-up table being of reversed polarity, said first and second look-up tables being used alternately.
10. A self-supported optical correlator, comprising:
a first holder having two opposite ends, one of said opposite ends being provided with anchor points, the other of said opposite ends being provided with a light source;
a second holder having two opposite ends, one of said opposite ends being provided with anchor points, the other of said opposite ends being provided with a light receiving element,
at least one intermediary holder, each of said at least one intermediary holder having two opposite ends, each of said at least one holder being provided with anchor points at each opposite end, at least one of said at least one intermediary holder being provided with a spatial light modulator for projecting an image and another spatial light modulator for projecting a filter,
each of said at least one intermediary holder being provided with optical components, said optical components being secured within said holders,
said anchor points being adapted to secure said first, second and intermediary holders together linearly end to end;
wherein, when said at least one intermediary holder are assembled, and said first holder is assembled at one extremity and said other holder is assembled at another extremity, said resulting assembly forms said optical correlator.
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 communication apparatus for communicating data via a data network, the communication apparatus comprising:
requesting means for requesting, for a service, a session establishment between a communication apparatus and a serving entity supporting the service, from the serving entity;
activating means for activating an association with a data network for the service via a core network; and
determining means for determining a requirement of a user connection for the service,
wherein the activating means is configured to activate the association with the data network for the service after a request of the session establishment by the requesting means when the requirement of the user connection for the service is determined by the determining means.
2. A communication apparatus according to claim 1, wherein the determining means is configured to receive a communication request for the service from a user of the communication apparatus and to determine the requirement of the user connection based on the communication request.
3. A communication apparatus according to claim 2, wherein the requesting means is configured to request a session establishment for the service between the communication apparatus and at least one other communication apparatus upon receipt of the communication request by the determining means.
4. A communication apparatus according to claim 1, further comprising:
receiving means for receiving a communication request for the service from the serving entity, and wherein the determining means is configured to determine the requirement of the user connection based on the communication request received by the receiving means.
5. A communication apparatus according to claim 4, wherein the communication request comprises an indication of an instant communication session with a user of the communication apparatus, and wherein the receiving means is configured to receive the indication of the instant communication session from the serving entity via the core network.
6. A communication apparatus according to claim 1, further comprising receiving means for receiving a session establishment indication indicating the session establishment for the service from the serving entity.
7. A communication apparatus according to claim 6, wherein the session establishment indication comprises a media authorization token.
8. A communication apparatus according to claim 1, wherein the requesting means is arranged to request the session establishment between the communication apparatus and the serving entity by using a primary Packet Data Protocol (PDP) context.
9. A communication apparatus according to claim 1, wherein the activating means is configured to activate the association with the data network by using a secondary Packet Data Protocol (PDP) context.
10. A serving entity for supporting a service for a communication apparatus for communicating data via a data network, the serving entity comprising:
receiving means for receiving a request for a session establishment for a service between a communication apparatus and a serving entity from the communication apparatus;
processing means for performing the session establishment for the service between the communication apparatus and the serving entity; and
sending means for sending a session establishment indication indicating the session establishment for the service between the communication apparatus and the serving entity towards the communication apparatus.
11. A serving entity according to claim 10, wherein the sending means is configured to send towards the communication apparatus a communication request for the service, the communication request comprising an indication of an instant communication session with a user of the communication apparatus.
12. A serving entity according to claim 10, wherein the serving entity comprises an Internet Protocol Multimedia Subsystem (IMS) network including a Push to-talk over Cellular (PoC) application server.
13. A serving entity according to claim 10, wherein the serving entity comprises an Internet Protocol Multimedia Subsystem (IMS) network including a Proxy-Call State Control Function (P-CSCF).
14. A network for communicating data between a communication apparatus and a data network in accordance with a service, the service being supported by a serving entity, the network being configured to store a session establishment indication indicating a session establishment between the communication apparatus and the serving entity for the service.
15. A network according to claim 14, configured to activate an association with the data network for the service based on the session establishment indication.
16. A network according to claim 14, wherein the network comprises a General Packet Radio Service (GPRS) network including a Gateway GPRS Support Node (GGSN), providing access to a data network including the Internet.
17. A network system comprising:
a communication apparatus for communicating data via a data network, the communication apparatus including,
requesting means for requesting, for a service, a session establishment between the communication apparatus and a serving entity supporting the service, from the serving entity,
activating means for activating an association with a data network for the service via a core network, and
determining means for determining a requirement of a user connection for the service,
wherein the activating means is configured to activate the association with the data network for the service after a request of the session establishment by the requesting means when the requirement of the user connection for the service is determined by the determining means;
a serving entity for supporting the service for the communication apparatus for communicating data via the data network, the serving entity including,
receiving means for receiving the request for the session establishment for the service between the communication apparatus and the serving entity from the communication apparatus,
processing means for performing the session establishment for the service between the communication apparatus and the serving entity, and
sending means for sending a session establishment indication indicating the session establishment for the service between the communication apparatus and the serving entity towards the communication apparatus; and
a network for communicating the data between the communication apparatus and the data network in accordance with the service, the service being supported by the serving entity, the network being configured to store the session establishment indication indicating the session establishment between the communication apparatus and the serving entity for the service.
18. A communication method of communicating data via a data network, the communication method comprising:
a requesting step including requesting, for a service, a session establishment between a communication apparatus and a serving entity supporting the service, from the serving entity;
a determining step including determining a requirement of a user connection for the service; and
an activating step including activating an association with a data network for the service via a core network.
19. A method of supporting a service for a communication apparatus for communicating data via a data network, the method comprising:
a receiving step including receiving a request for a session establishment for a service between the communication apparatus and a serving entity from the communication apparatus;
a processing step including performing the session establishment for the service; and
a sending step including sending a session establishment indication indicating the session establishment for the service towards the communication apparatus.
20. A method of communicating data between a communication apparatus and a data network in accordance with a service, the service being supported by a serving entity, wherein a session establishment indication indicating a session establishment between the communication apparatus and the serving entity for the service is stored in a core network providing access to the data network.
21. A computer program product, comprising software code portions, said computer program product embodied on a computer readable medium and controlling a computer to execute a process comprising:
requesting, for a service, a session establishment between a communication apparatus and a serving entity supporting the service, from the serving entity;
determining a requirement of a user connection for the service; and
activating an association with a data network for the service via a core network.
22. A computer program product, the computer program product embodied on a computer-readable medium on which software code portions are stored, the computer-readable medium controlling a computer to execute a process comprising:
receiving a request for a session establishment for a service between the communication apparatus and a serving entity from the communication apparatus;
performing the session establishment for the service; and
sending a session establishment indication indicating the session establishment for the service towards the communication apparatus.
23. The computer program product according to claim 21, wherein the computer program product is directly loadable into an internal memory of the computer.
24. A communication apparatus for communicating data via a data network, the communication apparatus comprising:
a transceiver configured to request, for a service, a session establishment between the communication apparatus and a serving entity supporting the service, from the serving entity;
a controller configured to activate an association with a data network for the service via a core network; and
a processor configured to determine a requirement of a user connection for the service,
wherein the controller is further configured to activate the association with the data network for the service after a request of the session establishment by the transceiver when the requirement of the user connection for the service is determined by the processor.
25. A serving entity for supporting a service for a communication apparatus for communicating data via a data network, the serving entity comprising:
a receiver configured to receive a request for a session establishment for a service between the communication apparatus and the serving entity from the communication apparatus;
a processor configured to perform the session establishment for the service between the communication apparatus and the serving entity; and
a transmitter configured to send a session establishment indication indicating the session establishment for the service between the communication apparatus and the serving entity towards the communication apparatus.