Apparatus, system and method of controlling data flow over a communication network
First Claim
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1. An apparatus comprising:
- a memory; and
a processor configured to cause a Universal Serial Bus (USB) Protocol Adaptation Layer (PAL) host of a media-agnostic connectivity PAL to;
transmit a first transfer request to a USB PAL device, the first transfer request to initiate transfer of data from a USB endpoint of a USB device to the USB PAL host, the first transfer request comprising a request identifier (ID);
transmit to the USB PAL device a second transfer request comprising a same request ID as the request ID in the first transfer request, when no transfer response is received from the USB PAL device after a first predefined time period; and
following receipt of a transfer response from the USB PAL device comprising the same request ID as the request ID in the first transfer request, and a transfer pending status code indicating that the data is delayed and pending to be received from the USB device, reset a retransmission counter, and wait a second, extended, predefined time period, before an attempt to retransmit the second transfer request.
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Abstract
Some demonstrative embodiments include apparatuses, systems and/or methods of controlling data flow over a communication network. For example, an apparatus may include a communication unit to communicate between first and second devices a transfer response, the transfer response in response to a transfer request, the transfer response including a transfer pending status indicating data is pending to be received at the second device, the communication unit is to communicate the transfer response regardless of whether a retry indicator of the transfer request represents a first request for transfer or a retried request.
68 Citations
17 Claims
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1. An apparatus comprising:
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a memory; and a processor configured to cause a Universal Serial Bus (USB) Protocol Adaptation Layer (PAL) host of a media-agnostic connectivity PAL to; transmit a first transfer request to a USB PAL device, the first transfer request to initiate transfer of data from a USB endpoint of a USB device to the USB PAL host, the first transfer request comprising a request identifier (ID); transmit to the USB PAL device a second transfer request comprising a same request ID as the request ID in the first transfer request, when no transfer response is received from the USB PAL device after a first predefined time period; and following receipt of a transfer response from the USB PAL device comprising the same request ID as the request ID in the first transfer request, and a transfer pending status code indicating that the data is delayed and pending to be received from the USB device, reset a retransmission counter, and wait a second, extended, predefined time period, before an attempt to retransmit the second transfer request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one computer processor, enable the at least one computer processor to cause a Universal Serial Bus (USB) Protocol Adaptation Layer (PAL) host of a media-agnostic connectivity PAL to:
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transmit a first transfer request to a USB PAL device, the first transfer request to initiate transfer of data from a USB endpoint of a USB device to the USB PAL host, the first transfer request comprising a request identifier (ID); transmit to the USB PAL device a second transfer request comprising a same request ID as the request ID in the first transfer request, when no transfer response is received from the USB PAL device after a first predefined time period; and following receipt of a transfer response from the USB PAL device comprising the same request ID as the request ID in the first transfer request, and a transfer pending status code indicating that the data is delayed and pending to be received from the USB device, reset a retransmission counter, and wait a second, extended, predefined time period, before an attempt to retransmit the second transfer request. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification