1. A method for controlling transmission power levels in a spread spectrum time division duplex communication system having frames with time slots for communication, the method comprising:
receiving at a first communication station communications from a second communication station and transmitting from the first station power commands based on in part a reception quality of the received communications;
transmitting from the first communication station a first communication having a transmission power level in a first time slot;
receiving at the second communication station the first communication and the power commands;
measuring a power level of the first communication as received;
determining a pathloss estimate based on in part the measured received first communication power level and the first communication transmission power level; and
setting a transmission power level for a second communication in a second time slot from the second station to the first station based on in part the pathloss estimate weighted by a quality factor and the power commands.
2. The method of claim 1 wherein the set transmission power level is based on in part a desired received power level at the first station, a closed loop factor and an open loop factor; wherein the closed loop factor is based on in part the received power commands and the open loop factor is based on in part the pathloss estimate weighted by the quality factor.
3. The method of claim 1 wherein the set transmission power level is based on in part a desired received power level at the first station and a combined closed loopopen loop factor; wherein the combined closed loopopen loop factor is based on in part the received power commands and the pathloss estimate weighted by the quality factor.
4. The method of claim 2 wherein the closed loop factor is updated for each received power command.
5. The method of claim 3 wherein the combined factor is updated for each received power command.
6. The method of claim 2 wherein the desired received power level is based on in part a target signal to interference ratio and a measured interference level at the first station.
7. The method of claim 3 wherein the desired received power level is based on in part a target signal to interference ratio and a measured interference level at the first station.
8. The method of claim 1 wherein the first station is a base station and the second station is a user equipment.
9. The method of claim 1 wherein the first station is a user equipment and the second station is a base station.
10. A code division multiple access user equipment for controlling transmission power levels, the user equipment comprising:
means for receiving a first communication and power commands;
means for measuring a power level of the first communication as received;
means for determining a pathloss estimate based on in part the measured received first communication power level and the first communication transmission power level; and
means for setting a transmission power level for a second communication based on in part the pathloss estimate weighted by a quality factor and the power commands.
11. The user equipment of claim 10 wherein the set transmission power level is based on in part a desired received power level, a closed loop factor and an open loop factor; wherein the closed loop factor is based on in part the received power commands and the open loop factor is based on in part the pathloss estimate weighted by the quality factor.
12. The user equipment of claim 10 wherein the set transmission power level is based on in part a desired received power level at the first station and a combined closed loopopen loop factor; wherein the combined closed loopopen loop factor is based on in part the received power commands and the pathloss estimate weighted by the quality factor.
13. The user equipment of claim 11 wherein the closed loop factor is updated for each received power command.
14. The user equipment of claim 12 wherein the combined factor is updated for each received power command.
15. The user equipment of claim 11 wherein the desired received power level is based on in part a target signal to interference ratio and a measured interference level.
16. The user equipment of claim 12 wherein the desired received power level is based on in part a target signal to interference ratio and a measured interference level.
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 spine formation device for forming a spine of a bundle of folded sheets, the spine formation device comprising:
a sheet conveyer that conveys the bundle of folded sheets with a folded portion of the bundle forming a front end portion of the bundle;
a clamping unit disposed downstream from the sheet conveyer in a sheet conveyance direction in which the bundle of folded sheets is transported, for squeezing the folded portion of the bundle in a direction of thickness of the bundle;
a contact member disposed downstream from the clamping unit in the sheet conveyance direction and including a flat contact surface against which the folded portion of the bundle is pressed;
a controller comprising a CPU and operatively connected to the sheet conveyer as well as the clamping unit to cause the bundle of folded sheets to bulge by stopping the sheet conveyer after the bundle of folded sheets is transported a predetermined conveyance distance downstream in the sheet conveyance direction from a contact position between the contact member and the folded portion of the bundle, the predetermined distance set in accordance with a predetermined sheet-related variable, and to cause the clamping unit to squeeze a bulging portion of the bundle created between the sheet conveyer and the contact member with the folded potion pressed against the contact member; and
an input unit via which a user selects whether the predetermined conveyance distance is set automatically or manually.
2. The spine formation device according to claim 1, wherein the clamping unit comprises:
a first clamping member; and
a second clamping member disposed downstream from the first clamping member in the sheet conveyance direction,
wherein the controller causes the first clamping member to localize the bulging portion of the bundle created between the sheet conveyer and the contact member to a downstream side in the sheet conveyance direction and causes the second clamping member to form the spine of the bundle by squeezing a bulging portion of the bundle created between the first clamping member and the contact member.
3. The spine formation device according to claim 1, wherein the predetermined sheet-related variable comprises at least one of a quantity of the folded sheets, a sheet thickness, a sheet size, and a special sheet classification.
4. The spine formation device according to claim 3, wherein the special sheet classification is data identifying the sheet as one of an OHP sheet, a label sheet, and a coated sheet.
5. The spine formation device according to claim 1, wherein the predetermined sheet-related variable comprises a thickness of the bundle of folded sheets.
6. The spine formation device according to claim 5, wherein, when the bundle of folded sheets is constituted of multiple standard sheets, the predetermined conveyance distance of the bundle from the contact position between the contact member and the folded portion of the bundle is calculated as
\u03b4def=(1\u2212\u03c04)t
wherein \u03b4def and t represent the predetermined conveyance distance for a standard sheet classification and the thickness of the bundle, respectively.
7. The spine formation device according to claim 1, wherein the predetermined sheet-related variable comprises a quantity of the folded sheets, a sheet thickness, and a special sheet classification, and
the predetermined conveyance distance of the bundle from the contact position between the contact member and the folded portion of the bundle is a sum of a distance set in accordance with a special sheet classification and a default conveyance distance for a standard sheet classification, calculated as
\u03b4def=(2\u2212\u03c02)Tdef\u2212N
wherein \u03b4def, Tdef, and N respectively represent the predetermined conveyance distance for standard sheets, a thickness of a standard sheet, and the quantity of sheets in the bundle.
8. The spine formation device according to claim 1, wherein the clamping unit comprises a pair of pressing members arranged in the direction of thickness of the bundle of folded sheets, on both sides of the bundle, the pair of pressing members each including:
a pressing surface pressed against one of opposed sides of the front end portion of the bundle; and
a sloped surface disposed downstream from the pressing surface in the sheet conveyance direction, sloped in a direction away from the sloped surface of the other pressing member toward downstream in the sheet conveyance direction.
9. A bookbinding system comprising:
an image forming apparatus to form images on sheets of recording media; and
a spine formation device for forming a spine of a bundle of folded sheets, the spine formation device comprising:
a sheet conveyer that conveys the bundle of folded sheets with a folded portion of the bundle forming a front end portion of the bundle;
a clamping unit disposed downstream from the sheet conveyer in a sheet conveyance direction in which the bundle of folded sheets is transported, for squeezing the folded portion of the bundle in a direction of thickness of the bundle;
a contact member disposed downstream from the clamping unit in the sheet conveyance direction and including a flat contact surface against which the folded portion of the bundle is pressed;
a controller comprising a CPU and operatively connected to the sheet conveyer as well as the clamping unit to cause the bundle of folded sheets to bulge by stopping the sheet conveyer after the bundle of folded sheets is transported a predetermined conveyance distance downstream in the sheet conveyance direction from a contact position between the contact member and the folded portion of the bundle, the predetermined distance set in accordance with a predetermined sheet-related variable, and to cause the clamping unit to squeeze a bulging portion of the bundle created between the sheet conveyer and the contact member with the folded potion pressed against the contact member; and
an input unit via which a user selects whether the predetermined conveyance distance is set automatically or manually.
10. A spine formation method used in a spine formation device including a sheet conveyer, a clamping unit, and a contact member disposed, in that order, in a sheet conveyance direction in which a bundle of folded sheets is transported, the spine formation method comprising:
transporting the bundle of folded sheets with the folded portion of the bundle forming a front end portion of the bundle in the sheet conveyance direction;
causing the bundle of folded sheets to bulge by stopping the bundle of folded sheets after the bundle of folded sheets is transported a predetermined conveyance distance downstream in the sheet conveyance direction from a contact position between the contact member and the folded portion of the bundle of folded sheets; and
forming a spine of the bundle of folded sheets by squeezing a bulging portion of the bundle of folded sheets created between the sheet conveyer and the contact member in the direction of thickness of the bundle with the folded portion pressed against the contact member,
wherein the predetermined distance is set in accordance with a predetermined sheet-related variable; and
wherein a user selects whether the predetermined conveyance distance is set automatically or manually via an input unit.