1. A base station device that performs radio communication with a terminal device, comprising:
a report acquisition section that acquires, from the terminal device, a report relating to a measurement result of communication quality; and
a selection section that selects a transmission state for the terminal device, wherein
the transmission state includes, at least, a first transmission state in which transmission is performed using a first radio resource subset configured to include one or a plurality of radio resources that do not suffer interference from another base station device, and a second transmission state in which transmission is performed using at least a second radio resource subset configured to include one or a plurality of radio resources that are likely to suffer interference from another base station device,
the report acquisition section acquires, from the terminal device, a report relating to a measurement result of communication quality of one or a plurality of radio resource subsets including the second radio resource subset,
when the report is acquired, the selection section selects, based on the report, either the first transmission state or the second transmission state as the transmission state for the terminal device, and
the selection section selects the first transmission state as the transmission state for the terminal device before the report is acquired.
2. The base station device according to claim 1, further including:
a notification section that notifies subset information indicating one or a plurality of the radio resource subsets including the second radio resource subset, wherein
the notification section notifies another base station device of the subset information, the another base station device being able to notify the terminal device of the subset information.
3. The base station device according to claim 1, further including:
a notification section that notifies subset information indicating one or a plurality of the radio resource subsets including the second radio resource subset, wherein
during a handover process in which the terminal device performs handover to the base station device, the notification section notifies a source base station device in the handover process of the subset information.
4. The base station device according to claim 3, wherein
the notification section notifies the source base station device of the subset information by including the subset information in a message to be transmitted to the source base station device for the handover process.
5. The base station device according to claim 4, wherein
the message to be transmitted to the source base station device for the handover process is a response to a handover request transmitted from the source base station device.
6. The base station device according to claim 1, further including:
a notification section that notifies the terminal device of subset information indicating one or a plurality of the radio resource subsets including the second radio resource subset.
7. The base station device according to claim 6, wherein
the notification section transmits the subset information as broadcast information.
8. The base station device according to claim 6, wherein
the notification section notifies the terminal device of the subset information, during a connection establishment process for establishing connection between the terminal device and the base station device.
9. The base station device according to claim 8, wherein
the notification section notifies the terminal device of the subset information by including the subset information in a message that is transmitted from the base station device to the terminal device in order to establish connection between the terminal device and the base station device.
10. The base station device according to claim 1, wherein
in the second transmission state, transmission is performed by using the first radio resource subset and the second radio resource subset.
11. The base station device according to claim 1, wherein
the radio resource is a time resource or a frequency resource.
12. The base station device according to claim 1, wherein
the radio resource is a subframe or a carrier.
13. A terminal device that performs radio communication with a base station device, comprising:
a measurement section that measures communication quality of a radio resource subset configured to include one or a plurality of radio resources that are likely to suffer interference from another base station device;
a transmission section that transmits, to the base station device, a report relating to a measurement result by the measurement section; and
a subset information acquisition section that acquires subset information indicating a radio resource subset whose communication quality should be measured by the measurement section.
14. The terminal device according to claim 13, wherein
the acquisition section acquires the subset information from the another base station device.
15. The terminal device according to claim 13, wherein
the acquisition section acquires the subset information from a source base station device in a handover process.
16. The terminal device according to claim 13, wherein
the subset information is included in broadcast information transmitted from the base station device, and
the subset information acquisition section acquires the subset information by receiving the broadcast information from the base station device.
17. The terminal device according to claim 16, wherein
the measurement section measures communication quality of a radio resource subset indicated by the subset information included in the broadcast information that has been received in advance of a connection establishment process for establishing connection between the terminal device and the base station device, and
the transmission section transmits the report during the connection establishment process.
18. The terminal device according to claim 13, wherein
the subset information is included in a message that is transmitted from the base station device to the terminal device in order to establish connection between the terminal device and the base station device, and
the subset information acquisition section acquires the subset information by receiving the message from the base station device.
19. A radio communication system including a base station device, and a terminal device that performs radio communication with the base station device, wherein
the base station device includes: a report acquisition section that acquires, from the terminal device, a report relating to a measurement result of communication quality; and a selection section that selects a transmission state for the terminal device,
the transmission state includes, at least, a first transmission state in which transmission is performed using a first radio resource subset configured to include one or a plurality of radio resources that do not suffer interference from another base station device, and a second transmission state in which transmission is performed using at least a second radio resource subset configured to include one or a plurality of radio resources that are likely to suffer interference from another base station device,
the report acquisition section acquires, from the terminal device, a report relating to a measurement result of communication quality of one or a plurality of radio resource subsets including the second radio resource subset,
when the report is acquired, the selection section selects, based on the report, either the first transmission state or the second transmission state as the transmission state for the terminal device, and
the selection section selects the first transmission state as the transmission state for the terminal device before the report is acquired.
20. The radio communication system according to claim 19, wherein
the base station device further includes a notification section that notifies subset information indicating one or a plurality of the radio resource subsets including the second radio resource subset,
the notification section notifies another base station device of the subset information, the another base station device being able to notify the terminal device of the subset information, and
the another base station device notifies the terminal device of the subset information.
21. A method performed by a base station device to select a transmission state, wherein
the transmission state includes, at least, a first transmission state in which transmission is performed using a first radio resource subset configured to include one or a plurality of radio resources that do not suffer interference from another base station device, and a second transmission state in which transmission is performed using at least a second radio resource subset configured to include one or a plurality of radio resources that are likely to suffer interference from another base station device, and
the base station device
selects the first transmission state as a transmission state for the terminal device before acquiring, from the terminal device, a report relating to a measurement result of communication quality of one or a plurality of radio resource subsets including the second radio resource subset, and
upon acquiring the report, selects, based on the report, either the first transmission state or the second transmission state as the transmission state for the terminal device.
22. A method for transmitting information from a base station device to a terminal device, wherein
the information is subset information indicating a radio resource subset configured to include one or a plurality of radio resources to be a target of measurement of communication quality by the terminal device,
the base station device notifies another base station device of the subset information, the another base station device being able to notify the terminal device of the subset information, and
the another base station device transmits the subset information to the terminal device.
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. An optoelectronic device on a substrate comprising a rib waveguide and a lateral PN diode,
where the rib waveguide comprises:
a slab of monocrystalline silicon formed on the substrate, and
a rib formed on the slab of monocrystalline silicon;
the lateral PN diode comprises:
first and second doped regions formed in the slab of monocrystalline silicon, where the second doped region is oppositely charged to the first doped region and first and second electrical contacts formed in the respective first and second doped regions in the slab of monocrystalline silicon,
where a PN junction is formed at the boundary of the first and second doped regions, a depletion region at the PN junction is substantially in the center of a guided optical mode propagating through the rib waveguide; and,
wherein a circuit is coupled to the first and second electrical contacts of the PN diode wherein the circuit comprises a transistor formed from the slab of monocrystalline silicon.
2. The optoelectronic device of claim 1, wherein the size of the depletion region in the PN diode may be changed by varying an applied reverse bias voltage.
3. The optoelectronic device of claim 2, wherein changing the size of the depletion region changes the effective index of refraction of the rib waveguide.
4. The optoelectronic device of claim 3, wherein changing the effective index of refraction of the rib waveguide causes a phase shift in a guided optical wave propagating through the rib waveguide.
5. The optoelectronic device of claim 2, wherein changing the size of the depletion region changes the absorption of a guided optical wave propagating through the rib waveguide.
6. The optoelectronic device of claim 1, and further comprising using the optoelectronic device in an optical processing system.
7. The optoelectronic device of claim 6, wherein the optical processing system is selected from a group comprising: an arrayed waveguide grating (AWG), an optical switch, a laser cavity, a ring resonator based adddrop filter, a Fabry-Perot (FP) cavity based adddrop filter, an MZI based filter, a ring resonator based filter, FP cavity based filter, a periodically perturbed waveguide, a corrugated waveguide, a multi-mode-interference (MMI) splittercombiner, Y-junction and directional coupler.
8. The optoelectronic device of claim 1, wherein each of the first and second electrical contacts is comprised of an ohmic contact.
9. The optoelectronic device of claim 1, and further comprising at least one conductive plug coupling each of the first and second electrical contacts to at least one of a plurality of metal layers of an integrated circuit.
10. The optoelectronic device of claim 1, and further comprising at least one local interconnect for coupling an electrical contact on the slab of semiconductor with an electrical contact on a device formed on the substrate.
11. The optoelectronic device of claim 1, wherein the circuit comprises a device selected from the group comprising: a CMOS transistor, a BiCMOS transistor, a bipolar junction transistor (BJT), a junction FET (JFET) transistor, a diode, a resistor, a capacitor and an inductor.
12. The optoelectronic device of claim 1, wherein the propagation properties of a guided optical wave in the rib waveguide may be modulated by varying an applied reverse bias voltage.
13. The optoelectronic device of claim 1, and further comprising the longitudinal propagation of a guided optical wave through substantially the central section of the rib waveguide,
where the central section of the rib waveguide guides the substantial majority of the power of the optical wave propagating down the rib waveguide and
where the first and second electrical contacts are formed not in proximity to the guided optical mode propagating in substantially the central section of the rib waveguide.
14. The optoelectronic device of claim 1, and further comprising using the optoelectronic device in an integrated optical modulation system selected from a group comprising: a Mach-Zehnder Interferometer, a ring modulator and a Fabry-Perot cavity.
15. The optoelectronic device of claim 1, wherein the silicon of the rib waveguide and the silicon body of the transistor are formed at the same time from the same silicon.
16. The optoelectronic device of claim 1, wherein the substrate is selected from a group comprised of:
a substrate comprising:
a layer of silicon dioxide disposed on a layer of monocrystalline silicon,
a layer of sapphire and,
an air filled cavity;
a double silicon on insulator (double SOI) substrate comprising:
a first layer comprised of monocrystalline silicon,
a second layer comprised of silicon dioxide disposed on the first layer,
a third layer comprised of monocrystalline silicon disposed on the second layer, and
a fourth layer comprised of silicon dioxide disposed on the third layer,
a fifth layer comprised of silicon;
a silicon on sapphire (SOS) substrate, and
a silicon on insulator (SOI) substrate.
17. The optoelectronic device of claim 1 wherein the circuit comprises a reverse bias voltage source.
18. The optoelectronic device of claim 1 wherein the circuit couples a reverse bias voltage source to the PN diode.