1. A method of controlling an uplink transmit power in a wireless communication, performed by a user equipment (UE), the method comprising:
acquiring a resource allocation for uplink transmission from a base station (BS);
determining a maximum power reduction (MPR) based on the resource allocation;
adjusting a maximum output power by using the MPR;
determining a transmit power of a uplink channel within the adjusted maximum output power; and
transmitting an uplink data on the uplink channel,
wherein the resource allocation comprises a number of contiguous resource blocks in a channel bandwidth and a starting index which is an index of a resource block with the lowest index among the contiguous resource blocks, and the channel bandwidth is divided into a first region, a second region and a third region,
wherein the MPR is determined according to the number of the contiguous resource blocks in the first region and the third region, and the MPR is determined according to the starting index in the second region,
wherein the MPR in the third region increases as the number of the contiguous resource blocks decreases.
2. The method of claim 1, wherein the first region includes a resource block with smallest index among entire resource blocks in the channel bandwidth, and the third region includes a resource block with largest index among the entire resource blocks.
3. The method of claim 2, wherein the nearest region from a public safety band is the first region.
4. The method of claim 3, wherein the public safety band is ranged from 769 MHz to 775 MHz.
5. The method of claim 2, wherein the number of the entire resource blocks in the channel bandwidth is 50.
6. The method of claim 2, wherein the first region includes resource blocks with indexes ranged from #0 to #12, the second region includes resource blocks with indexes ranged from #13 to #36, and the third region includes resource blocks with indexes ranged from #37 to #49.
7. The method of claim 1, wherein the channel bandwidth is 10 MHz.
8. The method of claim 7, wherein an operating band for the channel bandwidth is ranged from 777 MHz to 787 MHz.
9. The method of claim 1, wherein the MPR is determined in the third region by following equation:
CB\u2212CC*log10(CRB)
where CB and CC are parameters and CRB is the number of contiguous resource blocks.
10. The method of claim 1, wherein the MPR in the second region is defined when the number of contiguous resource blocks is larger than a threshold.
11. The method of claim 10, wherein the second region is divided into two parts according to the starting index and the thresholds for each part are differently defined.
12. The method of claim 10, wherein the MPR in the second region is set to zero when the staring index is near the boundary of the third region.
13. A transmitter comprising:
a transmit circuitry to transmit a transmit signal;
a power controller configured to:
determine a MPR based on resource allocation;
adjust a maximum output power by using the MPR; and
determine a transmit power of the transmit signal within the adjusted maximum output power,
wherein the resource allocation comprises a number of contiguous resource blocks in a channel bandwidth and a starting index which is an index of a resource block with the lowest index among the contiguous resource blocks, and the channel bandwidth is divided into a first region, a second region and a third region,
wherein the MPR is determined according to the number of the contiguous resource blocks in the first region and the third region, and the MPR is determined according to the starting index in the second region,
wherein the MPR in the third region increases as the number of the contiguous resource blocks decreases.
14. The transmitter of claim 13, wherein the first region includes a resource block with smallest index among entire resource blocks in the channel bandwidth, and the third region includes a resource block with largest index among the entire resource blocks.
15. The method of claim 14, wherein the nearest region from a public safety band is the first region.
16. The transmitter of claim 15, wherein the public safety band is ranged from 769 MHz to 775 MHz.
17. The transmitter of claim 13, wherein the MPR is determined in the third region by following equation:
CB\u2212CC*log10(CRB)
where CB and CC are parameters and CRB is the number of contiguous resource blocks.
18. The transmitter of claim 13, wherein the MPR in the second region is defined when the number of contiguous resource blocks is larger than a threshold.
19. The transmitter of claim 18, wherein the second region is divided into two parts according to the starting index and the thresholds for each part are differently defined.
20. The transmitter of claim 18, wherein the MPR in the second region is set to zero when the staring index is near the boundary of the third region.
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 method for splicing first and second optical fiber cable ends, the method comprising the steps of:
preparing the first and second optical fiber cable ends;
inserting the prepared first and second fiber cable ends into opposite ends of an outer splice assembly, wherein projecting fiber portions of the prepared fiber cable ends enter an alignment bore of a glass ferrule positioned in a central bore of the outer splice assembly as the prepared fiber cable ends are inserted;
backlighting the projecting fiber portions through a backlighting port in the outer splice assembly and through the glass ferrule;
visually inspecting the backlighted projecting fiber portions through a view port in the outer splice assembly and through the glass ferrule; and
fixing the outer splice assembly to at least one of the prepared first and second optical fiber cable ends.
2. The method of claim 1, wherein the step of visually inspecting further comprises:
installing a magnifier over the view port.
3. The method of claim 2, wherein the step of backlighting the projecting fiber portions further comprises backlighting through a background optical diffuser contained in the magnifier.
4. The method of claim 2, wherein installing the magnifier over the view port comprises clipping the magnifier to the outer splice assembly.
5. The method of claim 1, wherein the step of preparing the first and second optical fiber cable ends further comprises performing the following steps on each fiber cable end:
removing from the optical fiber cable end a length of outer jacket to expose a length of inner jacket;
removing a portion of the exposed length of inner jacket to expose a length of fiber;
inserting the fiber cable end into a first end of a respective inner crimp sleeve, the inner crimp sleeve having a through bore with a large diameter section for receiving the exposed inner jacket and a small diameter section for receiving the exposed fiber, the exposed fiber projecting from a second end of the respective inner crimp sleeve to form the projecting fiber portion;
crimping the inner crimp sleeve to secure the fiber end; and
cleaving the projecting fiber portion a predetermined distance from the respective inner crimp sleeve.
6. The method of claim 5, wherein the cleaving step further comprises scoring a coating of the fiber.
7. The method of claim 5, wherein the cleaving step further comprises scoring around a complete circumference of the fiber at a cleave point.
8. The method of claim 1, wherein the central bore of the glass ferrule contains an index matching gel.
9. The method of claim 1, wherein the central bore of the glass ferrule has a triangular cross section.
10. The method of claim 1, wherein the central bore of the glass ferrule includes lead-in chamfers to guide the projecting fiber portions into the central bore.
11. The method of claim 1, further comprising the steps of:
rotating the fiber ends relative to each other before fixing the outer splice assembly to the fiber cable ends;
measuring signal strength across the splice during the rotating; and
performing the fixing at a relative rotational position of the fiber ends resulting in a maximum signal strength.
12. The method of claim 1, further comprising the step of:
applying an adhesive-lined shrink wrap sleeve over the splice after fixing the outer splice assembly to the fiber cable ends.
13. The method of claim 1, further comprising the step of:
capturing strength members of the first and second optical fiber cable ends.
14. A splicing kit for splicing first and second optical fiber cable ends, comprising:
an outer splice assembly including an outer cannula and a glass ferrule positioned in a central bore of the outer cannula, the glass ferrule having a fiber alignment bore for receiving first and second fiber ends of the first and second fiber cable ends, the outer cannula defining a viewing port through a wall of the cannula in registration with the glass ferrule; the outer cannula further defining a backlighting port through the wall of the cannula in registration with the glass ferrule, the viewing port and the backlighting port being in opposing positions on the cannula wall, the fiber alignment bore being in a line of sight between the backlighting port and the viewing port.
15. The kit of claim 14, further comprising:
a viewing magnifier for viewing the central bore of the glass ferrule, the magnifier being configured for attachment to the outer splice assembly, the magnifier having a lens in registration with the viewing port and a background optical diffuser in registration with the backlighting port when the magnifier is attached.
16. The kit of claim 14, wherein the glass ferrule further comprises lead-in chamfers at both ends of the alignment bore.
17. The kit of claim 14, wherein the alignment bore of the glass ferrule is triangular in cross section.
18. The kit of claim 14, further comprising an index-matching gel contained within the central bore of the ferrule.
19. The kit of claim 14, further comprising two inner crimp sleeves, each sleeve comprising a cylindrical body with an inner bore for receiving one of the first and second optical fiber cable ends and an outer diameter for fitting in the central bore of the outer cannula.
20. The kit of claim 12, wherein the central bore of each of the inner crimp sleeves further comprises a single diametric step separating a first bore length sized to accept an inner jacket layer of the fiber cable, and a second bore length sized for accepting a core fiber of the fiber cable.
21. A method for preparing an optical fiber cable end for splicing, the optical fiber cable including at least one jacket layer, a core fiber and a protective coating on the core fiber, the method comprising the steps of:
removing the at least one jacket layer from the fiber cable end to expose the core fiber with its protective coating;
scoring a complete circumference of the exposed core fiber to form a circumferential score, the circumferential score penetrating the protective coating and scoring an underlying surface of the core fiber; and
cleaving the fiber at the score.
22. The method of claim 21, wherein the step of scoring the exposed fiber further comprises the steps of:
biasing a cutting blade against the fiber; and
revolving the cutting blade about the fiber.
23. The method of claim 22, wherein the step of scoring the exposed fiber further comprises the step of:
releasing the cutting blade bias using a thumb-activated button.
24. The method of claim 21, further comprising the steps of:
axially positioning a shoulder on the optical fiber cable end against a reference stop of a fiber cleaving tool; and
performing the scoring and cleaving steps at a predetermined distance from the reference shoulder.
25. The method of claim 21, further comprising the step of:
inserting the cleaved fiber end, in the cleaved condition, into a ferrule containing an index matching gel.
26. A fiber cleaving tool for cleaving an optical fiber extending from an end of an optical fiber cable, the optical fiber cable end further comprising a crimp sleeve crimped on the optical fiber and on an inner jacket of the fiber cable, the tool comprising:
a tool housing;
a thumbwheel assembly mounted in the housing for rotation about a thumbwheel rotation axis, the thumbwheel assembly defining a through bore extending coaxially with the thumbwheel rotation axis, the through bore having a fiber alignment section sized for accepting an optical fiber and a crimp sleeve alignment section sized for receiving the crimp sleeve; the bore further including a sleeve reference surface for axially locating the cable end in the bore, the thumbwheel assembly further comprising:
a thumbwheel for rotating the thumbwheel assembly about the thumbwheel rotation axis;
a back support aligned with the fiber alignment section of the through bore for supporting one side of an optical fiber extending from the fiber alignment section; and
a scoring blade supported on the thumbwheel assembly for motion toward and away from the back support; whereby the optical fiber extending from the fiber alignment section may be trapped between the scoring blade and the back support.
27. The fiber cleaving tool of claim 26 further comprising:
a fiber securing clamp connected to the tool housing for preventing movement of the fiber when the thumbwheel assembly is rotated.
28. The fiber cleaving tool of claim 26, further comprising:
a biasing element for biasing movement of the scoring blade in a direction toward the back support.
29. The fiber cleaving tool of claim 26 further comprising:
a blade release button for moving the scoring blade away from the back support.
30. The fiber cleaving tool of claim 26 wherein the through bore further comprises a conical fiber insertion guide for guiding the fiber into the fiber alignment section of the through bore.
31. A crimp sleeve for preparing an optical fiber cable end for mechanical splicing, the optical fiber cable including an outer jacket layer, an inner jacket layer and a core fiber, the crimp sleeve comprising:
a crimpable outer metallic cannula defining an axial through bore; and
an inner crimp liner of polyetheretherketone (PEEK) having a cylindrical outer surface secured within the through bore of the outer metallic cannula, the PEEK crimp liner defining an inner bore substantially coaxial with the cylindrical outer bore, the inner bore including at least a first section with a first inner diameter for slidingly receiving the core fiber.
32. The crimp sleeve of claim 31, wherein metallic cannula comprises a material selected from a group consisting of stainless steel and Inconel\xae.
33. The crimp sleeve of claim 31, wherein inner crimp liner is secured within the through bore of the outer metallic cannula with an adhesive.
34. The crimp sleeve of claim 31, wherein the inner bore of the inner crimp liner further comprises:
a second section having a second inner diameter for receiving the inner jacket layer, and
a tapered lead-in between the first and second sections for guiding the fiber core into the first section of the bore.
35. A method of securing an optical fiber for use in a mechanical splice, comprising the steps of:
inserting the optical fiber into a crimp bore of a polyetheretherketone (PEEK) crimp liner, the fiber slidingly fitting into the bore; and
crimping a metallic cannula surrounding the crimp liner, thereby frictionally securing the fiber within the bore.
36. The method of claim 35, wherein metallic cannula is selected from a group consisting of stainless steel tubing and Inconel\xae tubing.
37. The method of claim 35, wherein crimp liner is secured within the metallic cannula with an adhesive.
38. The method of claim 35, further comprising the steps of:
stripping a section of an inner jacket of an optical fiber cable containing the optical fiber, to expose the optical fiber; and
inserting a remaining portion of the inner jacket into an inner jacket counter bore of the PEEK crimp liner aligned with the crimp bore.
39. The method of claim 38, further comprising the step of:
guiding the fiber core into the crimp bore using a tapered lead-in between the inner jacket counter bore and the crimp bore.
40. A splicing kit for splicing first and second optical fiber cable ends, comprising:
an outer splice assembly including a cylindrical outer cannula and a glass ferrule positioned in a central bore of the outer cannula, the glass ferrule having a fiber alignment bore for receiving first and second fiber ends of the first and second fiber cable ends, the outer cannula having a single outer diameter for its length; first and second inner crimp sleeves, each sleeve comprising a cylindrical body with an inner bore for receiving one of the first and second optical fiber cable ends and an outer diameter for fitting in the central bore of the outer cannula adjacent the glass ferrule;
first and second strength fiber ferrules for inserting inside a strength fiber layer of the fiber optical cable;
the outer cannula having a length sufficient to accommodate the strength fiber ferrules on sides of the inner crimp sleeves opposite the glass ferrule, the cannula being crimpable over the first and second inner crimp sleeves and the first and second strength fiber ferrules.
41. The kit of claim 40, further comprising:
a polyimide sleeve for surrounding the strength fiber of the optical fiber cable along a length of the ferrule.
42. The kit of claim 40, wherein the central bore of each of the inner crimp sleeves further comprises a single diametric step separating a first bore length sized to accept an inner jacket layer of the fiber cable, and a second bore length sized for accepting a core fiber of the fiber cable.
43. A method for splicing first and second optical fiber cable ends, the method comprising the steps of:
preparing the first and second optical fiber cable ends by:
exposing lengths of a core glass fiber, an inner jacket layer, and a strength fiber layer;
inserting a metallic ferrule between each exposed length of strength fiber layer and an underlying length of inner jacket layer;
inserting each fiber cable end into a first end of a respective inner crimp sleeve, the inner crimp sleeve having a through bore with a large diameter section for receiving the exposed inner jacket and a small diameter section for receiving the exposed fiber, the exposed fiber projecting from a second end of the respective inner crimp sleeve to form a projecting fiber portion;
crimping each inner crimp sleeves to secure a fiber end; and
cleaving the projecting fiber portions a predetermined distance from the respective inner crimp sleeve;
inserting the prepared first and second fiber cable ends into opposite ends of a cannula having a single outer diameter for the length of the cannula, wherein projecting fiber portions of the prepared fiber cable ends enter an alignment bore of a glass ferrule positioned in a central bore of the cannula as the prepared fiber cable ends are inserted; and
crimping the cannula over each of the inner crimp sleeves and each of the metallic ferrules to fix the core glass fibers and the strength fiber layers to the cannula.
44. The method of claim 43, further comprising the step of:
assembling a polyimide sleeve over the strength fiber layer before inserting the prepared fiber ends into the cannula.
45. The method of claim 1, further comprising the step of:
applying an adhesive-lined shrink wrap sleeve over the splice after fixing the outer splice assembly to the fiber cable ends.