1. A light wavelength conversion member comprising:
a phosphor; and
a translucent member containing the phosphor,
wherein a difference in refractive index between the phosphor and the translucent member is less than or equal to 0.2.
2. A light wavelength conversion member according to claim 1, the phosphor including:
a blue phosphor that is excited by light whose wavelength ranges from 350 nm to 480 nm and emits blue light; and
a yellow phosphor that is excited by light whose wavelength ranges from 350 nm to 480 nm and emits yellow light,
wherein the difference in refractive index between each of the blue phosphor and the yellow phosphor and the translucent member is less than or equal to 0.2.
3. A light wavelength conversion member according to claim 2, wherein a general formula of the yellow phosphor is (Ca1-x-y-z-w,Srx, MIIy,Euz,MRW)7(MIVO3)6X2, where indicates Mg, Ba, or Zn,
MR indicates a rare-earth element or Mn,
MIV, which contains Si as an essential component, is partially replaceable by at least one type of element selected from the group consisting of Ge, Ti, Zr, and Sn,
X, which contains Cl as an essential component, indicates at least one type of halogen element, and
x, y, z, and w each lies in a range such that 0.1<x<0.7, 0\u2266y<0.3, 0<z<0.4, and 0<w<0.1, respectively.
4. A light wavelength conversion member according to claim 2, wherein a general formula of the blue phosphor is M1a(M2O4)bXc:Red, wherein M1 contains, as an essential component, at least one type of element selected from the group consisting of Ca, Sr, and Ba, and is partially replaceable by at least one type of element selected from the group consisting of Mg, Zn, Cd, K, Ag, and Tl,
M2, which contains at least P as an essential component, is partially replaceable by at least one type of element selected from the group consisting of V, Si, As, Mn, Co, Cr, Mo, W, and B,
X indicates at least one type of halogen element,
Re, which contains Eu2+ as an essential component, indicates at least one type of rare-earth element or Mn, and
a, b, c, and d each lies in a range such that 4.2\u2266a\u22665.8, 2.5\u2266b\u22663.5, 0.8<c<1.4, and 0.01<d<0.1, respectively.
5. A light wavelength conversion member according to claim 1, wherein the translucent member contains inorganic amorphous material.
6. A light wavelength conversion member according to claim 3, wherein a general formula of the blue phosphor is M1a(M2O4)bXc:Red, wherein M1 contains, as an essential component, at least one type of element selected from the group consisting of Ca, Sr, and Ba, and is partially replaceable by at least one type of element selected from the group consisting of Mg, Zn, Cd, K, Ag, and Tl,
M2, which contains at least P as an essential component, is partially replaceable by at least one type of element selected from the group consisting of V, Si, As, Mn, Co, Cr, Mo, W, and B,
X indicates at least one type of halogen element,
Re, which contains Eu2+ as an essential component, indicates at least one type of rare-earth element or Mn, and
a, b, c, and d each lies in a range such that 4.2\u2266a\u22665.8, 2.5\u2266b\u22663.5, 0.8<c<1.4, and 0.01<d<0.1, respectively.
7. A light wavelength conversion member according to claim 2, wherein the translucent member contains inorganic amorphous material.
8. A light wavelength conversion member according to claim 3, wherein the translucent member contains inorganic amorphous material.
9. A light wavelength conversion member according to claim 4, wherein the translucent member contains inorganic amorphous material.
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 of controlling wireless device communication with access nodes, comprising:
determining that a first loading of a first access node in communication with a plurality of wireless devices in a first coverage area meets a loading criteria;
decreasing a handover criteria for a second access node, wherein the second access node comprises a second coverage area that overlaps at least a portion of the first coverage area;
performing a handover of at least one of the plurality of wireless devices to the second access node when a signal level of the second access node received at the at least one of the plurality of wireless devices meets the decreased handover criteria;
determining a change in the first loading and a change in a throughput provided to the at least one of the plurality of wireless devices;
determining a change in a periodicity of data sent to the at least one of the plurality of wireless devices; and
adjusting the decreased handover criteria for the second access node based on the change in the first loading, the change in the throughput provided to the at least one of the plurality of wireless devices, and the change in the periodicity of data sent to the at least one of the plurality of wireless devices.
2. The method of claim 1, further comprising:
determining a change in a latency of data sent to the at least one of the plurality of wireless devices; and
adjusting the handover criteria for the second access node based on the change in the first loading, the change in the throughput provided to the at least one of the plurality of wireless devices, the change in the periodicity of data sent to the at least one of the plurality of wireless devices, and the change in the latency of data sent to the at least one of the plurality of wireless devices.
3. The method of claim 1, further comprising:
determining a change in a data loss rate of data sent to the at least one of the plurality of wireless devices; and
adjusting the handover criteria for the second access node based on the change in the first loading, the change in the throughput provided to the at least one of the plurality of wireless devices, the change in the periodicity of data sent to the at least one of the plurality of wireless devices, and the change in the a change in the data loss rate.
4. The method of claim 1, further comprising:
determining that a communication session of the at least one of the plurality of wireless devices is terminated when the handover is performed of at least one of the plurality of wireless devices to the second access node; and
adjusting the handover criteria for the second access node based on the change in the first loading and whether the communication session is terminated.
5. The method of claim 1, further comprising:
determining an application requirement of an application running on the at least one of the plurality of wireless devices;
determining a weighting factor based on the determined application requirement and applying the weighting factor to the determined change in the throughput provided to the at least one of the plurality of wireless devices; and
adjusting the handover criteria for the second access node based on the change in the first loading, the weighted change in the throughput provided to the at least one of the plurality of wireless devices, and the change in the periodicity of data sent to the at least one of the plurality of wireless devices.
6. The method of claim 1, further comprising:
determining location characteristics of the second access node relative to the first access node;
adjusting a handover criteria for a third access node based on the adjusted handover criteria for the second access node when the third access node comprises location characteristics relative to the first access node which are substantially similar to the location characteristics of the second access node.
7. The method of claim 1, further comprising:
determining a change in a second loading of the second access node; and
adjusting the handover criteria for the second access node based on the change in the first loading, the change in the second loading, the change in the throughput provided to the at least one of the plurality of wireless devices, and the change in the periodicity of data sent to the at least one of the plurality of wireless devices.
8. The system of claim 1, wherein the processing node is further configured to:
determine a change in a latency of data sent to the at least one of the plurality of wireless devices; and
adjust the handover criteria for the second access node based on the change in the first loading, the change in the throughput provided to the at least one of the plurality of wireless devices, the change in the periodicity of data sent to the at least one of the plurality of wireless devices, and the change in the latency of data sent to the at least one of the plurality of wireless devices.
9. A system of controlling wireless device communication with access nodes, comprising:
a processing node, configured to
determine that a first loading of a first access node in communication with a plurality of wireless devices in a first coverage area meets a loading criteria;
decrease a handover criteria for a second access node, wherein the second access node comprises a second coverage area that overlaps at least a portion of the first coverage area;
perform a handover of at least one of the plurality of wireless devices to the second access node when a signal level of the second access node received at the at least one of the plurality of wireless devices meets the decreased handover criteria;
determine a change in the first loading and a change in a throughput provided to the at least one of the plurality of wireless devices;
determine a change in a periodicity of data sent to the at least one of the plurality of wireless devices; and
adjust the decreased handover criteria for the second access node based on the change in the first loading, the change in the throughput provided to the at least one of the plurality of wireless devices, and the change in the periodicity of data sent to the at least one of the plurality of wireless devices.
10. The system of claim 9, wherein the processing node is further configured to:
determine a change in a data loss rate of data sent to the at least one of the plurality of wireless devices; and
adjust the handover criteria for the second access node based on the change in the first loading, the change in the throughput provided to the at least one of the plurality of wireless devices, the change in the periodicity of data sent to the at least one of the plurality of wireless devices, and the change in the a change in the data loss rate.
11. The system of claim 9, wherein the processing node is further configured to:
determine that a communication session of the at least one of the plurality of wireless devices is terminated when the handover is performed of at least one of the plurality of wireless devices to the second access node; and
adjust the handover criteria for the second access node based on the change in the first loading and whether the communication session is terminated.
12. The system of claim 9, wherein the processing node is further configured to:
determine an application requirement of an application running on the at least one of the plurality of wireless devices;
determine a weighting factor based on the determined application requirement and applying the weighting factor to the determined change in the throughput provided to the at least one of the plurality of wireless devices; and
adjust the handover criteria for the second access node based on the change in the first loading, the weighted change in the throughput provided to the at least one of the plurality of wireless devices, and the change in the periodicity of data sent to the at least one of the plurality of wireless devices.
13. The system of claim 9, wherein the processing node is further configured to:
determine location characteristics of the second access node relative to the first access node;
adjust a handover criteria for a third access node based on the adjusted handover criteria for the second access node when the third access node comprises location characteristics relative to the first access node which are substantially similar to the location characteristics of the second access node.
14. The system of claim 9, wherein the processing node is further configured to:
determine a change in a second loading of the second access node; and
adjusting the handover criteria for the second access node based on the change in the first loading, the change in the second loading, the change in the throughput provided to the at least one of the plurality of wireless devices, and the change in the periodicity of data sent to the at least one of the plurality of wireless devices.