1. A first communication apparatus that belongs to a first communication system having a highest-priority with respect to using a frequency band including a first sub-frequency band and a second sub-frequency band, the first communication system being one of a plurality of communication systems coexisting on the same communication medium, each of the plurality of communication systems having a given predetermined priorities with respect to using the frequency band, an upper limit and a lower limit of the frequency band being respectively defined as F_MAX and F_MIN, the first communication apparatus comprising:
a coexistence signal generator that selects, out of a plurality of candidates, F_BOUND1 which is an upper limit of the first sub-frequency band which is used by the first communication system, and generates a coexistence signal indicating the first sub-frequency band from F_MIN to F_BOUND1 is occupied and used by the first communication system, F_BOUND1 being higher than F_MIN and F_BOUND1 being lower than F_MAX; and
a coexistence signal transmitter that transmits the coexistence signal to another communication system of the plurality of communication systems,
wherein the first sub-frequency band is usable by the first communication system or the other communication system, and the second sub-frequency band upper than the first sub-frequency band is usable only by the other communication system.
2. The first communication apparatus according to claim 1, wherein
a period for data communication is divided into a plurality of time slots, and
the coexistence signal generator generates a coexistence signal having a matrix structure in which an occupied and used frequency band and a time slot are specified.
3. The first communication apparatus according to claim 1, wherein the coexistence signal comprising: a time slot indicating whether or not the first sub-frequency band from F_MIN to F_BOUND1 is used; and a time slot specifying a value of F_BOUND1 when the frequency band from F_MIN to F_BOUND1 is used.
4. The first communication apparatus according to claim 1, wherein the communication medium used by the first communication system is a power line.
5. The first communication apparatus according to claim 1, wherein the communication medium used by the first communication system is a wireless medium.
6. The first communication apparatus according to claim 1, wherein
the first communication system is a system used as an access system, and the other communication system is a system used as an in-home system.
7. A second communication apparatus that belongs to a second communication system having other than a highest-priority with respect to using a frequency band including a first sub-frequency band and a second sub-frequency band, the second communication system being one of a plurality of communication systems coexisting on the same communication medium, each of the plurality of communication systems having a given predetermined priorities with respect to using the frequency band, an upper limit and a lower limit of the frequency band being respectively defined as F_MAX and F_MIN, the second communication apparatus comprising:
a coexistence signal receiver that receives, from a first communication system having the highest-priority use right, a first coexistence signal indicating that the first sub-frequency band from F_MIN to F_BOUND1 is occupied and used by the first communication system, F_BOUND1 being selected by the first communication system, F_BOUND1 being higher than F_MIN and F_BOUND1 being lower than F_MAX, and
a frequency band determiner that determines a third sub-frequency band which is to be occupied and used by the second communication system, the third sub-frequency band which is included in the second sub-frequency band upper than the first sub-frequency band indicated by the first coexistence signal,
wherein the first sub-frequency band is usable by one of the first communication system, the second communication system, and the other communication system, and the second sub-frequency band is usable by one of communication systems other than the first communication system.
8. The communication apparatus according to claim 7, further comprising
a coexistence signal generator that generates a second coexistence signal indicating the third sub-frequency band; and
a coexistence signal transmitter that transmits the second coexistence signal to a communication system other than the second communication system.
9. The second communication apparatus according to claim 7, wherein a period for data communication is divided into a plurality of time slots.
10. The second communication apparatus according to claim 7, wherein the second coexistence signal comprising: a time slot indicating whether or not the frequency band from F_MIN to F_BOUND1 is used; and a time slot specifying a value of F_BOUND1 when the frequency band from F_MIN to F_BOUND1 is used.
11. The second communication apparatus according to claim 7, wherein the communication medium used by the second communication system is a power line.
12. The second communication apparatus according to claim 7, wherein the communication medium used by the second communication system is a wireless medium.
13. The second communication apparatus according to claim 7, wherein
the first communication system is a system used as an access system, and each of the second communication system and the other communication system is a system used as an in-home system.
14. An integrated circuit used in a first communication apparatus that belongs to a first communication system having a highest-priority with respect to using a frequency band including a first sub-frequency band and a second sub-frequency band, the first communication system being one of a plurality of communication systems coexisting on the same communication medium, each of the plurality of communication systems having a given predetermined priorities with respect to using the frequency band, an upper limit and a lower limit of the frequency band being respectively defined as F_MAX and F_MIN, wherein
circuits functioning as the following sections are integrated on the integrated circuit:
a coexistence signal generating section that selects, out of a plurality of candidates, F_BOUND1 which is an upper limit of the first sub-frequency band which is used by the first communication system, and generates a coexistence signal indicating the first sub-frequency band from F_MIN to F_BOUND1 is occupied and used by the first communication system, F_BOUND1 being higher than F_MIN and F_BOUND1 being lower than F_MAX; and
a coexistence signal transmitting section that transmits the coexistence signal to another communication system of the plurality of communication systems,
wherein the first sub-frequency band is usable by the first communication system or the other communication system, and the second sub-frequency band upper than the first sub-frequency band is usable only by the other communication system.
15. An integrated circuit used in a second communication apparatus that belongs to a second communication system having other than a highest-priority with respect to using a frequency band including a first sub-frequency band and a second sub-frequency band, the second communication system being one of a plurality of communication systems coexisting on the same communication medium, each of the plurality of communication systems having a given predetermined priorities with respect to using the frequency band, an upper limit and a lower limit of the frequency band being respectively defined as F_MAX and F_MIN, wherein
circuits functioning as the following sections are integrated on the integrated circuit:
a coexistence signal receiving section that receives, from a first communication system having the highest-priority use right, a first coexistence signal indicating that the first sub-frequency band from F_MIN to F_BOUND1 is occupied and used by the first communication system, F_BOUND1 being selected by the first communication system, F_BOUND1 being higher than F_MIN and F_BOUND1 being lower than F_MAX; and
a frequency band determining section that determines a third sub-frequency band which is to be occupied and used by the second communication system, the third sub-frequency band which is included in the second sub-frequency band upper than the first sub-frequency band indicated by the first coexistence signal,
wherein the first sub-frequency band is usable by one of the first communication system, the second communication system, and the other communication system, and the second sub-frequency band is usable by one of communication systems other than the first communication system.
16. The second communication apparatus according to claim 8, wherein the coexistence signal has a matrix structure in which an occupied and used frequency band and a time slot are specified.
17. A communication method used in a first communication system, having a highest-priority use right, of a plurality of communication systems, which are given predetermined priorities with respect to a right to use a frequency band of which an upper limit and a lower limit are respectively defined as F_MAX and F_MIN, coexist on the same communication medium, the method comprising:
selecting, out of a plurality of candidates, F_BOUND1 which is an upper limit of the first sub-frequency band which is used by the first communication system;
generating a coexistence signal indicating the first sub-frequency band from F_MIN to F_BOUND1 is occupied and used by the first communication system, F_BOUND1 being higher than F_MIN and F_BOUND1 being lower than F_MAX; and
transmitting the coexistence signal to another communication system of the plurality of communication systems,
wherein the first sub-frequency band is usable by the first communication system or the other communication system, and the second sub-frequency band upper than the first sub-frequency band is usable only by the other communication system.
18. A communication method used in a first communication system, having a use right other than a highest-priority use right, of a plurality of communication systems, which are given predetermined priorities with respect to a right to use a frequency band of which an upper limit and a lower limit are respectively defined as F_MAX and F_MIN, coexist on the same communication medium, the method comprising:
receiving, from a first communication system having the highest-priority use right, a first coexistence signal indicating a frequency band from F_MIN to F_BOUND1, F_BOUND1 being selected by the first communication system, F_BOUND1 being higher than F_MIN and F_BOUND1 being lower than FMAX, which is occupied and used by the first communication system; and
determining a third sub-frequency band which is to be occupied and used by the second communication system, the third sub-frequency band which is included in the second sub-frequency band upper than the first sub-frequency band indicated by the first coexistence signal,
wherein the first sub-frequency band is usable by one of the first communication system, the second communication system, and the other communication system, and the second sub-frequency band is usable by one of communication systems other than the first communication system.
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 thermal insulation fiber, comprising:
a conventional fiber; and
a nano unit,
wherein based on a total weight of the convention fiber, the nano unit is of a content of 0.1 wt % to 3 wt %, so as to improve an insulation rate of the thermal insulation fiber;
the nano unit comprises a microparticle having a size of 300 nm to 8000 nm; and
the microparticle comprises at least one of a mixture of titanium (Ti) and cerium (Ce), a mixture of Ti and magnesium (Mg), and a mixture of Ti, Ce, Mg, silicon (Si) and calcium (Ca).
2. The thermal insulation fiber according to claim 1, wherein the conventional fiber comprises a chemical fiber, and the chemical fiber comprises at least one of an artificial fiber and a synthetic fiber.
3. The thermal insulation fiber according to claim 2, wherein based on the total weight of the convention fiber, the nano unit is of a content of 1.5 wt % to 3 wt %; and the nano unit comprises the microparticle having a size of 300 nm to 4000 nm.
4. The thermal insulation fiber according to claim 3, wherein in the nano unit, the microparticle comprises:
Ti being of a content of 500 weight units to 10000 weight units; and Ce being of a content of 60 weight units to 300 weight units, or
Ti being of a content of 500 weight units to 10000 weight units; and Mg being of a content of 10 weight units to 500 weight units, or
Ti being of a content of 500 weight units to 10000 weight units; Ce being of a content of 60 weight units to 300 weight units; Ca being of a content of 50 weight units to 500 weight units; Mg being of a content of 10 weight units to 500 weight units; and Si being of a content of 50 weight units to 3000 weight units.
5. The thermal insulation fiber according to claim 2, wherein based on the total weight of the convention fiber, the nano unit is of a content of 0.1 wt % to 1.5 wt %; and the nano unit comprises the microparticle having a size of 4000 nm to 8000 nm.
6. The thermal insulation fiber according to claim 5, wherein in the nano unit, the microparticle comprises:
Ti being of a content of 500 weight units to 10000 weight units; and Ce being of a content of 60 weight units to 300 weight units, or
Ti being of a content of 500 weight units to 10000 weight units; and Mg being of a content of 10 weight units to 500 weight units, or
Ti being of a content of 500 weight units to 10000 weight units; Ce being of a content of 60 weight units to 300 weight units; Ca being of a content of 50 weight units to 500 weight units; Mg being of a content of 10 weight units to 500 weight units; and Si being of a content of 50 weight units to 3000 weight units.
7. The thermal insulation fiber according to claim 4, wherein in the nano unit, the microparticle further comprises:
K being of a content of 50 weight units to 100 weight units;
Sn being of a content of 100 weight units to 500 weight units; and
S being of a content of 50 weight units to 100 weight units.
8. A thermal insulation textile, at least comprising a part of the thermal insulation fiber according to claim 1.
9. A use of a fiber containing a nano unit in manufacturing a thermal textile, wherein the fiber containing the nano unit is the thermal insulation fiber according to claim 1.
10. The thermal insulation fiber according to claim 6, wherein in the nano unit, the microparticle further comprises:
K being of a content of 50 weight units to 100 weight units;
Sn being of a content of 100 weight units to 500 weight units; and
S being of a content of 50 weight units to 100 weight units.