Method and apparatus for establishing peer-to-peer communication
First Claim
1. A method of establishing peer-to-peer communication, the method comprising:
- receiving, at a first wireless transmit/receive unit (WTRU), a command signal including an indication of a timing signal to transmit, a transmit power level of the timing signal, and a time to transmit the timing signal;
transmitting, from the first WTRU, the timing signal in response to receiving the command signal; and
receiving, at the first WTRU, a handshake seeking signal from a second WTRU in response to the timing signal.
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Accused Products
Abstract
A method and apparatus for establishing peer-to-peer communication and performing forwarding under the control of a cellular network are described. A seeking wireless transmit/receive unit (WTRU) may receive a timing signal from at least one discoverable WTRU controlled by a base station. The seeking WTRU may estimate the quality of a radio link (i.e., path loss) between the seeking WTRU and the discoverable WTRU, and determine, (e.g., based on a threshold established by the base station), whether or not to report the estimated radio link quality to a base station that controls the discoverable WTRU. The power of the timing signal may be ramped up in predetermined steps such that the transmission power at any given time is known and may be used by the seeking WTRU for estimating the radio link quality. The timing signal may include at least one of a primary preamble or a secondary preamble.
14 Citations
13 Claims
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1. A method of establishing peer-to-peer communication, the method comprising:
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receiving, at a first wireless transmit/receive unit (WTRU), a command signal including an indication of a timing signal to transmit, a transmit power level of the timing signal, and a time to transmit the timing signal; transmitting, from the first WTRU, the timing signal in response to receiving the command signal; and receiving, at the first WTRU, a handshake seeking signal from a second WTRU in response to the timing signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of establishing peer-to-peer communication, the method comprising:
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transmitting, at a first wireless transmit/receive unit (WTRU), a first signal; and receiving, at the first WTRU, a second signal having a transmission power that is ramped up during listening windows until a maximum allowed transmission power is reached. - View Dependent Claims (8, 9)
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10. A method of establishing peer-to-peer communication, the method comprising:
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transmitting, from a first wireless transmit/receive unit (WTRU), a first signal to a second WTRU; and in response to receiving a second signal from the second WTRU, the first WTRU transmitting at least one of a primary preamble, a secondary preamble, superframe header (SFH) or a secondary SFH, wherein the second signal is a handshake seeking signal that has a transmission power that is ramped during listening windows until a maximum allowed transmission power is reached. - View Dependent Claims (11)
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12. A wireless transmit/receive unit (WTRU) comprising:
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a receiver configured to receive a command signal instructing the WTRU to transmit a timing signal, wherein the command signal includes an indication of the timing signal, a transmit power level of the timing signal, and a time to transmit the timing signal; and a transmitter configured to transmit the timing signal in accordance with the command signal, wherein the receiver is further configured to receive a handshake seeking signal from another WTRU in response to the timing signal. - View Dependent Claims (13)
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Specification