Techniques for synchronizing a clock of a wired connection when transmitted over a wireless channel
First Claim
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1. A method, performed by a device, for wireless communication, comprising:
- measuring a frequency of a source clock signal generated by the device, wherein the measurement of the frequency is performed using a first reference clock signal;
generating a frequency-stamp message based on the measured frequency, wherein the frequency-stamp message indicates the frequency of the source clock as a function of a frequency of the first reference clock signal;
encapsulating the frequency-stamp message in at least one packet; and
transmitting the at least one packet to another device over a wireless channel.
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Abstract
An apparatus and method for synchronizing a multimedia interface clock between a multimedia source device and a multimedia sink device connected over a wireless channel. The method comprises measuring a frequency of the source clock signal generated by the multimedia source device, wherein the measurement of the frequency is performed using a first reference clock signal; generating a frequency-stamp message including in part the measured frequency; encapsulating the frequency-stamp message in at least one packet; and transmitting the at least one packet to a wireless receiver connected to the multimedia sink device over the wireless channel.
22 Citations
21 Claims
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1. A method, performed by a device, for wireless communication, comprising:
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measuring a frequency of a source clock signal generated by the device, wherein the measurement of the frequency is performed using a first reference clock signal; generating a frequency-stamp message based on the measured frequency, wherein the frequency-stamp message indicates the frequency of the source clock as a function of a frequency of the first reference clock signal; encapsulating the frequency-stamp message in at least one packet; and transmitting the at least one packet to another device over a wireless channel. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for wireless communication, comprising:
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a frequency measurement module configured to measure a frequency of a source clock signal generated by the apparatus, wherein the measurement of the frequency is performed using a first reference clock signal, wherein the frequency measurement module is further configured to generate a frequency-stamp message including at least in part the measured frequency; a packetizer configured to encapsulate the frequency-stamp message in at least one packet, wherein the frequency-stamp message indicates the frequency of the source clock as a function of a frequency of the first reference clock signal; and a wireless transmitter configured to transmit the at least one packet to another device over a wireless channel.
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8. An apparatus for wireless communication, comprising:
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a de-packetizer configured to extract a frequency-stamp and a time-stamp from at least one packet received from a device; a frequency setting unit configured to determine a frequency value based on the frequency-stamp; and a clock generation unit comprising a phase-locked loop (PLL), wherein the clock generation unit is configured to; synthetize a sink clock signal using the determined frequency value and a reference clock signal during a locking phase of the PLL; and synthetize the sink clock signal using the time-stamp during a tracking phase of the PLL. - View Dependent Claims (9, 10, 11, 12)
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13. A method, performed by a device, for wireless communication, comprising:
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receiving at least one packet from another device; extracting a frequency-stamp and a time-stamp generated by the other device from at least one packet received from the other device; determining a frequency value based on the frequency-stamp; synthetizing a sink clock signal using the determined frequency value and a reference clock signal during a locking phase of a phase-locked loop (PLL); and synthetizing the sink clock signal using the time-stamp during a tracking phase of the PLL. - View Dependent Claims (14, 15, 16, 17, 20, 21)
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18. A computer-readable medium for wireless communication having instructions stored thereon for:
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measuring a frequency of a source clock signal generated by a device, wherein the measurement of the frequency is performed using a first reference clock signal; generating a frequency-stamp message based on the measured frequency, wherein the frequency-stamp message indicates the frequency of the source clock as a function of a frequency of the first reference signal; encapsulating the frequency-stamp message in at least one packet; and transmitting the at least one packet to another device over a wireless channel.
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19. A computer-readable medium for wireless communication having instructions stored thereon for:
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receiving at least one packet from a device; extracting a frequency-stamp and a time-stamp generated by the device from at least one packet received from the device; determining a frequency value based on the frequency-stamp; synthetizing a sink clock signal using the determined frequency value and a reference clock signal during a locking phase of a phase-locked loop (PLL); and synthetizing the sink clock signal using the time-stamp during a tracking phase of the PLL.
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Specification