METHOD, SYSTEM AND DEVICE FOR NETWORK COMMUNICATIONS WITHIN A VEHICLE
First Claim
1. A method of communicating over a network, comprising:
- providing a plurality of data terminal equipment (DTE) to the network;
providing each of the plurality of DTEs with data for transmission on the network, wherein the network is limited to convey the data from one DTE at a time, wherein data transmitted from two or more DTEs results in data collision state;
substantially simultaneously transmitting data by a first DTE of the plurality of DTEs and a second DTE of the plurality of DTEs;
receiving, by the second DTE, a collision signal indicating a collision state, wherein the first DTE continues transmitting;
in response to the collision state, causing the second DTE to initiate a backoff process, wherein the backoff process comprises a determination of a backoffLimit having a value randomly selected as zero or one; and
transmitting data, by the second DTE, upon the selecting the backoffLimit with a value of zero; and
waiting to transmit data, by the second DTE, upon the selecting of the backoffLimit with a value of one, whereby the second DTE waits a period of time associated with a slot time and wherein the slot time is determined as the time for one bit to be transmitted or received by a media access control (MAC) of the second DTE.
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Accused Products
Abstract
Embodiments of the present disclosure are directed to vehicle communication systems, in particular, toward contention resolution on a shared medium in vehicle communication systems. The present disclosure can provide a modified version of the Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard to handle physical layer (PHY), and data link layer'"'"'s (DLL) media access control (MAC) of the wired communication links in the vehicle communication subsystem utilizing a shared medium and half-duplex mode. As a result, the modified MAC and PHY may provide fair access and deterministic latency for shared access to the medium of vehicle communication systems independent of the offered network load.
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Citations
20 Claims
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1. A method of communicating over a network, comprising:
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providing a plurality of data terminal equipment (DTE) to the network; providing each of the plurality of DTEs with data for transmission on the network, wherein the network is limited to convey the data from one DTE at a time, wherein data transmitted from two or more DTEs results in data collision state; substantially simultaneously transmitting data by a first DTE of the plurality of DTEs and a second DTE of the plurality of DTEs; receiving, by the second DTE, a collision signal indicating a collision state, wherein the first DTE continues transmitting; in response to the collision state, causing the second DTE to initiate a backoff process, wherein the backoff process comprises a determination of a backoffLimit having a value randomly selected as zero or one; and transmitting data, by the second DTE, upon the selecting the backoffLimit with a value of zero; and waiting to transmit data, by the second DTE, upon the selecting of the backoffLimit with a value of one, whereby the second DTE waits a period of time associated with a slot time and wherein the slot time is determined as the time for one bit to be transmitted or received by a media access control (MAC) of the second DTE. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communications system, comprising:
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a network; a plurality of data terminal equipment (DTE) communicatively attached to the network, wherein each of the plurality of DTEs is provided with data for transmission on the network, wherein the network is limited to convey the data from one DTE at a time, and wherein data transmitted from two or more DTEs results in data collision; and wherein, upon substantially simultaneously transmitting data by a first DTE of the plurality of DTEs and a second DTE of the plurality of DTEs, the transmission of data by the first DTE signals the second DTE of a data collision and the first DTE continues transmitting; wherein, in response to the data collision, the second DTE initiates a backoff process, wherein the backoff process comprises a determination of a backoffLimit having a value randomly selected as zero or one; and wherein, upon the selecting the backoffLlimit of zero, the second DTE transmits; and wherein, upon the selecting of the backoffLimit of one, the second DTE waits a period of time associated with a slot time and wherein the slot time is determined as the time for one bit to be transmitted or received by a media access control (MAC) of the second DTE. - View Dependent Claims (13, 14, 15)
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16. A data terminal equipment (DTE), comprising:
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a network interface to a network; a data storage comprising data to transmit on the network; a processor; and wherein the processor, upon the DTE initiating transmitting the data and receiving data indicating a collision sate, initiates a backoff process, wherein the backoff process comprises a determination of a backoffLimit having a value randomly selected as zero or one; and transmitting data, by the second DTE, upon the selecting the backoffLimit with a value of zero; and waiting to transmit data, by the second DTE, upon the selecting of the backoffLimit with a value of one, whereby the second DTE waits a period of time associated with a slot time and wherein the slot time is determined as the time for one bit to be transmitted or received by a media access control (MAC) of the second DTE. - View Dependent Claims (17, 18, 19, 20)
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Specification