1. A wireless transmit receive unit (WTRU) comprising:
circuitry configured to receive, from a base station associated with WTRU to WTRU direct communication, power control configuration information for use in WTRU to WTRU direct communication; wherein the power control configuration information includes power control configuration information for an uplink from the WTRU to the base station and for a data channel for WTRU to WTRU direct communication and for a control channel for WTRU to WTRU direct communication;
the circuitry further configured to receive time and frequency resource information for WTRU to WTRU direct communication;
the circuitry further configured to transmit over the uplink channel to the base station at a power level based on a pathloss value added to a first value received in the power control configuration information;
the circuitry further configured to transmit over the data channel, based on the time and frequency resource information, selectively using a power level based on a pathloss value added to a second value received in the power control configuration information or using a power level not based on the pathloss; and
the circuitry further configured to transmit over the control channel based on the power control configuration information for the control channel.
2. The WTRU of claim 1 wherein the circuitry is further configured to receive a transmit power control command from the base station for use in setting the transmission power level of the data channel.
3. The WTRU of claim 1 wherein the base station is a cellular base station.
4. The WTRU of claim 3 wherein the cellular base station is an LTE or LTE-A base station.
5. A method for use in a wireless transmit receive unit (WTRU), the method comprising:
receiving, from a base station associated with WTRU to WTRU direct communication, power control configuration information for use in WTRU to WTRU direct communication; wherein the power control configuration information includes power control configuration information for an uplink from the WTRU to the base station and for a data channel for WTRU to WTRU direct communication and for a control channel for WTRU to WTRU direct communication;
receiving time and frequency resource information for WTRU to WTRU direct communication;
transmitting over the uplink channel to the base station at a power level based on a pathloss value added to a first value received in the power control configuration information;
transmitting over the data channel, based on the received time and frequency resource information, selectively using a power level based on a pathloss value added to a second value received in the power control configuration information or using a power level not based on the pathloss; and
transmitting over the control channel based on the power control configuration information for the control channel.
6. The method of claim 5, further comprising receiving a transmit power control command from the base station for use in setting the transmission power level of the data channel.
7. The method of claim 5, wherein the base station is a cellular base station.
8. The method of claim 5, wherein the cellular base station is an LTE or LTE-A base station.
9. A base station comprising:
circuitry configured to transmit, to a wireless transmit receive unit (WTRU) associated with WTRU to WTRU direct communication, power control configuration information for use in WTRU to WTRU direct communication; wherein the power control configuration information includes power control configuration information for an uplink from the WTRU to the base station and for a data channel for WTRU to WTRU direct communication and for a control channel for WTRU to WTRU direct communication;
the circuitry further configured to transmit time and frequency resource information for WTRU to WTRU direct communication;
the circuitry further configured to receive over the uplink channel from the WTRU at a power level based on a pathloss value added to a first value transmitted in the power control configuration information.
10. The base station of claim 9 wherein the circuitry is further configured to transmit a transmit power control command to the WTRU for use in setting the transmission power level of the data channel.
11. The base station of claim 9 wherein the base station is a cellular base station.
12. The base station of claim 9 wherein the cellular base station is an LTE or LTE-A base station.
13. A wireless transmit receive unit (WTRU) comprising:
circuitry configured to receive, from a base station, power control configuration information for use in WTRU to WTRU direct communication; wherein the power control configuration information includes power control configuration information for an uplink from the WTRU to the base station and for a data channel for WTRU to WTRU direct communication and for a control channel for WTRU to WTRU direct communication;
the circuitry further configured to transmit over the uplink channel to the base station at a power level based on a pathloss value added to a first value received in the power control configuration information;
the circuitry further configured to transmit over the data channel, selectively using a power level based on a pathloss value added to a second value received in the power control configuration information or using a power level not based on the pathloss; and
the circuitry further configured to transmit over the control channel based on the power control configuration information for the control channel.
14. The WTRU of claim 13 wherein the circuitry is further configured to receive a transmit power control command from the base station for use in setting the transmission power level of the data channel.
15. The WTRU of claim 13 wherein the base station is a cellular base station.
16. The WTRU of claim 15 wherein the cellular base station is an LTE or LTE-A base station.
17. The WTRU of claim 13, further comprising circuitry configured to receive time and frequency resource information for WTRU to WTRU direct communication.
18. The WTRU of claim 13 further comprising circuitry configured to transmit over the data channel based on time and frequency resource information.
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 variable diameter sprocket comprising:
a support having a rotation axis and at least three slotted and radial track elements each provided with at least two stopping elements;
at least three sprocket portions, each being so mounted to a respective one of said at least three radial track elements of said support as to be radially movable therein; each of said at least three sprocket portions includes a movable element configured and sized to interconnect with said at least two stopping elements to selectively maintain the sprocket portion in a desired radial position; each sprocket portion also includes a biasing element mounted thereto to bias said movable element towards said at least two stopping elements;
a sprocket diameter changing mechanism including a fixed portion and a movable portion mounted to said fixed portion; said movable portion including a pushing surface so positioned and configured as to overcome a biasing action of said biasing element through a pushing action on said movable element of said sprocket portion; said pushing action causing the disengagement of said movable element from one of said stopping element; said movable portion including at least one guiding surface configured and sized to reposition said sprocket portion in a second desired radial position; said movable portion also including a throat so configured, positioned and sized as to cease the pushing action of the pushing surface when said sprocket portion has reached said second desired radial position so as to engage said movable element with a stopping element corresponding to the second desired radial position.
2. A variable diameter sprocket as recited in claim 1, wherein said at least three slotted and radial track elements are removably mounted to said support.
3. A variable diameter sprocket as recited in claim 2, wherein said at least two stopping elements are generally frusto-conical indentations.
4. A variable diameter sprocket as recited in claim 1, wherein said movable element of each said sprocket portion includes a pin slidably mounted in an aperture of said sprocket portion; said pin including a first free end so configured and sized as to contact said pushing surface and a second end so configured and sized as to cooperate with said biasing element and with said stopping elements; said pin being slidable in said aperture between a fully extended position where said second end cooperates with said stopping elements to maintain said sprocket portion in a desired position and a fully retracted position where said sprocket portion is free to radially move within said track element.
5. A variable diameter sprocket as recited in claim 4, wherein said aperture includes a peripheral projection so configured and sized as to selectively contact said guiding surface of said movable portion of said sprocket diameter changing mechanism.
6. A variable diameter sprocket as recited in claim 4, wherein said biasing element includes a compression spring biasing said pin towards said fully extended position.
7. A variable diameter sprocket as recited in claim 1, wherein said pushing surface includes four angled ramp portions generally defining an X-shaped pattern and wherein said throat is generally located in the intersection of said four ramp portions.
8. A variable diameter sprocket as recited in claim 7, wherein each of said four ramp portions includes a shoulder defining said guiding portion.
9. A variable diameter sprocket comprising:
a support having a rotation axis and at least three slotted and radial track elements each provided with at least two stopping elements;
at least three sprocket portions, each being so mounted to a respective one of said at least three radial track elements of said support as to be radially movable therein; each of said at least three sprocket portions includes a movable element configured and sized to selectively interconnect with said at least two stopping elements to selectively maintain the sprocket portion in a desired radial position;
a sprocket diameter changing mechanism including a fixed portion and a movable portion mounted to said fixed portion; said movable portion including a pushing surface so positioned and configured as to disconnect said movable element of said sprocket portion from one of said at least two stopping elements; said movable portion including at least one guiding surface configured and sized to reposition said sprocket portion in a second desired radial position; said movable portion also including a throat so configured, positioned and sized as to cease the pushing action of the pushing surface when said sprocket portion has reached said second desired radial position so as to engage said movable element with a stopping element corresponding to the second desired radial position; said throat being so configured and sized that it does not contact said sprocket portion.
10. A variable diameter sprocket as recited in claim 9, wherein said at least three slotted and radial track elements are removably mounted to said support and wherein said at least two stopping elements are generally frusto-conical indentations.
11. A variable diameter sprocket as recited in claim 10, wherein said movable element of each said sprocket portion includes a pin slidably mounted in an aperture of said sprocket portion; said pin including a first free end so configured and sized as to contact said pushing surface and a second end so configured and sized as to cooperate with a biasing element and with said stopping elements; said pin being slidable in said aperture between a fully extended position where said second end cooperates with said stopping elements to maintain said sprocket portion in a desired position and a fully retracted position where said sprocket portion is free to radially move within said track element; said biaising element including a compression spring biasing said pin towards said fully extended position.
12. A variable diameter sprocket as recited in claim 11, wherein said aperture includes a peripheral projection so configured and sized as to selectively contact said guiding surface of said movable portion of said sprocket diameter changing mechanism, thereby preventing contact between said pin and said shoulder portion.
13. A variable diameter sprocket as recited in claim 9, wherein said pushing surface includes four angled ramp portions generally defining an X-shaped pattern and wherein said throat is generally located in the intersection of said four ramp portions.
14. A variable diameter sprocket as recited in claim 13, wherein each of said four ramp portions includes a shoulder defining said guiding portion.
15. A variable diameter sprocket comprising:
a support having a rotation axis and at five slotted and radial track elements each provided with six frusto-conical indentations;
five sprocket portions each being so mounted to a respective one of said five radial track elements of said support as to be radially movable therein; each of said sprocket portions includes a pin so slidably mounted in a aperture of said sprocket portion as to interconnect with said six stopping elements to selectively maintain the sprocket portion in a desired radial position; each sprocket portion also includes a biasing element mounted thereto to bias said slidable pin towards said six stopping elements; said pin including a first free end and a second end configured and sized to selectively interconnect with said six frusto-conical incentations; each said sprocket portion also including a peripheral projection surrounding said aperture;
a sprocket diameter changing mechanism including a fixed portion and a movable portion mounted to said fixed portion; said movable portion including a pushing surface so positioned and configured as to overcome a biasing action of said biasing element through a pushing action on said free end of said slidable pin; said pushing action causing the disengagement of said second end of said pin from one of said six stopping elements; said movable portion including at least one guiding surface configured and sized to contact said peripheral projection to reposition said sprocket portion in a second desired radial position; said movable portion also including a throat so configured, positioned and sized as to cease the pushing action of the pushing surface when said sprocket portion has reached said second desired radial position so as to engage said second end of said pin with a stopping element corresponding to the second desired radial position.