1. A method for data transmission, comprising:
categorizing users into one of a plurality of profiles using a processor based on device and channel characteristics;
mapping each of the plurality of profiles to one of a plurality of transmission schemes; and
combining data for a plurality of users categorized with different profiles for data transmission.
2. The method as recited in claim 1, wherein the plurality of transmission schemes include a diversity transmission scheme, a multiplexing transmission scheme, and a reuse transmission scheme.
3. The method as recited in claim 2, wherein the diversity transmission scheme includes at least one of a distributed antenna system and space time block codes; the multiplexing transmission scheme includes at least one of multi-user multiple-input and multiple-output and adaptive beamforming; and the reuse transmission scheme includes at least one of carrier sense multiple access and IEEE 802.11n.
4. The method as recited in claim 2, wherein categorizing includes:
determining whether a user is a diversity transmission scheme user based on the device and channel characteristics;
if the user is not a diversity transmission scheme user, categorizing the user as a multiplexing transmission scheme user; and
comparing estimated and measured multiplexing rates such that if the comparing is greater than a threshold, the user is categorized as a reuse transmission scheme user.
5. The method as recited in claim 1, further comprising allocating transmission resources in at least one of time and frequency between the plurality of transmission schemes based on at least one of traffic load, priority, and fairness.
6. The method as recited in claim 1, further comprising scheduling users of transmission resources for each of the plurality of transmission schemes.
7. The method as recited in claim 1, further comprising re-categorizing users based on changes to a channel state.
8. The method as recited in claim 2, further comprising periodically re-categorizing reuse and diversity transmission scheme users to the multiplexing transmission scheme.
9. A system for data transmission, comprising:
a categorization module configured to categorize users into one of a plurality of profiles using a processor based on device and channel characteristics;
the categorization module further configured to map each of the plurality of profiles to one of a plurality of transmission schemes; and
a framing module configured to combine data for a plurality of users categorized with different profiles for data transmission.
10. The system as recited in claim 9, wherein the plurality of transmission schemes include a diversity transmission scheme, a multiplexing transmission scheme, and a reuse transmission scheme.
11. The system as recited in claim 10, wherein the diversity transmission scheme includes at least one of a distributed antenna system and space time block codes; the multiplexing transmission scheme includes at least one of multi-user multiple-input and multiple-output and adaptive beamforming; and the reuse transmission scheme includes at least one of carrier sense multiple access and IEEE 802.11n.
12. The system as recited in claim 10, wherein the categorization module is further configured to:
determine whether a user is a diversity transmission scheme user based on the device and channel characteristics;
if the user is not a diversity transmission scheme user, categorize the user as a multiplexing transmission scheme user; and
compare estimated and measured multiplexing rates such that if the comparing is greater than a threshold, the user is categorized as a reuse transmission scheme user.
13. The system as recited in claim 9, further comprising an allocation module configured to allocate transmission resources in at least one of time and frequency between the plurality of transmission schemes based on at least one of traffic load, priority, and fairness.
14. The system as recited in claim 9, further comprising a scheduling module configured to schedule users of transmission resources for each of the plurality of transmission schemes.
15. The system as recited in claim 9, wherein the categorization module is further configured to re-categorize users based on changes to a channel state.
16. The system as recited in claim 10, wherein the categorization module is further configured to periodically re-categorize reuse and diversity transmission scheme users to the multiplexing transmission scheme.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A disk medium comprising:
a first disk member having a penetrating hole; and
a second disk member having a projecting portion, the projecting portion being placed within the penetrating hole of the first disk member, whereby the first and second disk members are combined.
2. A disk medium according to claim 1, wherein at least one of the penetrating hole of the first disk member and the projecting portion of the second disk member has a cylindrical shape.
3. A disk medium according to claim 1, further comprising:
a projection formed on an inner wall of the penetrating hole of the first disk member; and
a groove formed on an outer wall of the projecting portion of the second disk member, wherein the projection is inserted into the groove to combine the first and second disk members.
4. A disk medium according to claim 1, further comprising:
a projection formed on an outer wall of the projecting portion of the second disk member; and
a groove formed on an inner wall of the penetrating hole of the first disk member, wherein the projection is inserted into the groove to combine the first and second disk members.
5. A disk medium according to claim 1, further comprising:
a groove circumferentially formed on a side of one of the first and second disk members; and
a projection circumferentially formed on the other one of the first and second disk members to correspond with the groove.
6. A disk medium according to claim 1, further comprising:
a groove formed on a first surface portion of the first disk member and surrounding the penetrating hole;
a projection formed on a second surface portion of the second disk member and surrounding the projection portion, whereby the projection is placed within the groove to combine the first and second disk members.
7. A disk medium according to claim 6, wherein the first and second surface portions are inner portions of the first and second disk members.
8. A disk medium according to claim 6, wherein the first and second surface portions are outer edge portions of the first and second disk members.
9. A disk medium according to claim 8, further comprising:
a second groove formed on an inner surface portion of the first disk member; and
a second projection formed on an inner surface portion of the second disk member, whereby the second projection is placed within the second groove.
10. A disk medium according to claim 4, further comprising:
a second groove formed on an outer edge portion of the first disk member; and
a second projection formed on an outer edge portion of the second disk member, whereby the second projection is placed within the second groove.
11. A disk medium according to claim 3, further comprising:
a second groove formed on an outer edge portion of the first disk member; and
a second projection formed on an outer edge portion of the second disk member.
12. A disk medium according to claim 11, further comprising:
a bonding material applied between the first and second disk members.
13. A disk medium comprising:
a pair of bonded disk members, wherein a center hole of a predetermined diameter is formed only on one of the disk members.
14. A disk medium according to claim 12, wherein the center hole has the predetermined diameter of 15 mm.
15. A method for manufacturing an optical medium, comprising:
forming a first disk member having a penetrating hole;
forming a second disk member having a projecting portion; and
positioning the projecting portion of the second disk member within the penetrating hole of the first disk member, whereby the first and second disk members are combined to form an optical medium.
16. A method according to claim 15, wherein in the forming steps, at least one of the penetrating hole of the first disk member and the projecting portion of the second disk member has a cylindrical shape.
17. A method according to claim 15, wherein the step of forming the first disk member further includes:
forming a projection on an inner wall of the penetrating hole of the first disk member; and the step of forming the second disk member further includes:
forming a groove on an outer wall of the projecting portion of the second disk member, wherein the projection is inserted into the groove.
18. A method according to claim 15, wherein the step of forming the second disk member further includes:
forming a projection on an outer wall of the projecting portion of the second disk member; and the step of forming the first disk member further includes:
forming a groove on an inner wall of the penetrating hole of the first disk member, wherein the projection is inserted into the groove.
19. A method according to claim 15, wherein the forming steps include:
forming a groove circumferentially on a side of one of the first and second disk members; and
forming a projection circumferentially on the other one of the first and second disk members to correspond with the groove.
20. A method according to claim 15, further comprising:
forming a groove on a first surface portion of the first disk member to surround the penetrating hole;
forming a projection on a second surface portion of the second disk member to surround the projection portion, whereby the projection is placed within the groove to combine the first and second disk members.
21. A method according to claim 20, wherein the first and second surface portions are inner portions of the first and second disk members.
22. A method according to claim 20, wherein the first and second surface portions are outer edge portions of the first and second disk members.
23. A method according to claim 22, further comprising:
forming a second groove on an inner surface portion of the first disk member; and
forming a second projection on an inner surface portion of the second disk member, whereby the second projection is placed within the second groove.
24. A method according to claim 18, further comprising:
forming a second groove on an outer edge portion of the first disk member; and
forming a second projection on an outer edge portion of the second disk member, whereby the second projection is placed within the second groove.
25. A method according to claim 17, further comprising:
forming a second groove on an outer edge portion of the first disk member; and
forming a second projection on an outer edge portion of the second disk members.
26. A method according to claim 25, further comprising:
applying a bonding material between the first and second disk members.
27. A method of forming an optical disk comprising:
bonding a pair of disk members, wherein a center hole of a predetermined diameter is formed only on one of the disk members.
28. A method according to claim 27, wherein in the bonding step, the center hole has the predetermined diameter of 15 mm.