System and method for wireless communication of uncompressed video having a link control and bandwidth reservation scheme for control/management message exchanges and asynchronous traffic
First Claim
1. A method of performing medium access control in a system for wireless communication of uncompressed video, wherein the system comprises a high rate channel and a low rate channel having a lower transmission rate than the high rate channel, the method comprising:
- receiving a control initiation request message over the low rate channel from a client device during a contention based period;
determining at least one time slot to be reserved for contention-free transmission of control messages to or from the client device within a superframe period of a predetermined length in response to the control initiation request message, wherein determining at least one time slot includes determining a time slot duration, wherein the duration of each time slot is determined based on identifying a type of control message exchange sequence contained in the control initiation request message; and
transmitting a message over the low rate channel containing information identifying the at least one determined time slot,wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel.
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Accused Products
Abstract
A system and method for performing medium access control in a system for wireless communication of uncompressed video is disclosed. In one aspect, the method includes communicating a control initiation request message during a contention based period of a superframe period. The control initiation request message contains information allowing a device coordinator to determine a reserved time slot for communication of the requested message exchange. The requested message exchange is then performed in a non-contentious environment, thereby limiting collisions of contention based messages. The control initiation procedure and subsequent message exchanges take place on a low-rate channel. Transmission on the low-rate channel is time division duplexed with a high-rate channel, where transmission at any one time can take place on either the high-rate or the low-rate channel.
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Citations
39 Claims
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1. A method of performing medium access control in a system for wireless communication of uncompressed video, wherein the system comprises a high rate channel and a low rate channel having a lower transmission rate than the high rate channel, the method comprising:
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receiving a control initiation request message over the low rate channel from a client device during a contention based period; determining at least one time slot to be reserved for contention-free transmission of control messages to or from the client device within a superframe period of a predetermined length in response to the control initiation request message, wherein determining at least one time slot includes determining a time slot duration, wherein the duration of each time slot is determined based on identifying a type of control message exchange sequence contained in the control initiation request message; and transmitting a message over the low rate channel containing information identifying the at least one determined time slot, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 35, 36, 37, 38, 39)
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10. A system for performing medium access control in a network for wireless communication of uncompressed video, wherein the network comprises a high rate channel and a low rate channel having a lower transmission rate than the high rate channel, the system comprising:
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a receiver to receive a control initiation request message over the low rate channel from a client device during a contention based period; a link controller to determine at least one time slot to be reserved for contention-free transmission of control messages associated with the client device within a superframe period of a predetermined length in response to the control initiation request message, wherein determining at least one time slot includes determining a time slot duration, wherein the duration of each time slot is determined based on identifying a type of control message exchange sequence contained in the control initiation request message; and a transmitter to transmit a message over the low rate channel containing information identifying the at least one determined time slot, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for performing medium access control in a network for wireless communication of uncompressed video, wherein the network comprises a high rate channel and a low rate channel, the system comprising:
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means for receiving a control initiation request message over the low rate channel from a client device during a contention based period; means for determining at least one time slot to be reserved for contention-free transmission of control messages associated with the client device within a superframe period of a predetermined length in response to the control initiation request message, wherein determining at least one time slot includes determining a time slot duration, wherein the duration of each time slot is determined base on identifying a type of control message exchange sequence contained in the control initiation request message; and means for transmitting a message over the low rate channel containing information identifying the at least one determined time slot, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel.
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20. A method of performing medium access control in a system for wireless communication of uncompressed video, wherein the system comprises a high rate channel and a low rate channel having a lower transmission rate that the high rate channel, the method comprising:
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transmitting a control initiation request message over the low rate channel during a contention based period; receiving a plurality of messages over the low rate channel; determining that one of the received messages is a response message associated with the transmitted control initiation request message, the response message containing information identifying at least one reserved time slot reserved for contention-free transmission to or from the client device within a superframe period, the superframe period being of a predetermined length;
determining a duration of each of the at least one reserved time slot based on an identified type of control message exchange sequence contained in the control initiation request message; andtransmitting and/or receiving a control message over the low rate channel during the at least one identified time slot of one or more subsequent superframe periods, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A system for performing medium access control in a network for wireless communication of uncompressed video, wherein the network comprises a high rate channel and a low rate channel having a lower transmission rate than the high rate channel, the system comprising:
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a transmitter to transmit a control initiation request message over the low rate channel; a receiver to receive a plurality of messages over the low rate channel; and a medium access controller configured to determine that one of the received messages is a response message associated with the transmitted control initiation request message, the response message containing information identifying at least one reserved time slot within a superframe period, the superframe period being of a predetermined length, wherein the medium access controller determines the duration of the at least one time slot based on an identified type of control message exchange sequence contained in the control initiation request message; wherein the transmitter transmits and/or the receiver receives a control message over the low rate channel during the at least one identified time slot of one or more subsequent superframe periods, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A system for performing medium access control in a network for wireless communication of uncompressed video, wherein the network comprises a high rate channel and a low rate channel having a lower transmission rate than the high rate channel, the system comprising:
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means for transmitting a control initiation request message over the low rate channel during a contention based period; means for receiving a plurality of messages over the low rate channel; means for determining that one of the received messages is a response message associated with the transmitted control initiation request message, the response message containing information identifying at least one reserved time slot within a superframe period, the superframe period being of a predetermined length;
means for determining time slot duration based on identifying a type of control message exchange sequence contained in the control initiation request message; andwherein the means for transmitting transmits and/or the means for receiving receives a control message over the low rate channel during the at least one identified time slot of one or more subsequent superframe periods, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel.
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33. A system for communicating uncompressed video data over a wireless communication link, the wireless communication link including a high rate channel associated with a bandwidth capable of supporting transmission of the uncompressed video data, and a low rate channel associated with a bandwidth smaller than the bandwidth of the high rate channel, wherein frequency bands of the low rate channel and the high rate channel at least partially overlap, wherein the low rate channel has a lower transmission rate than the high rate channel, the system comprising:
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a device coordinator comprising; a receiver to receive a control initiation request message over the low rate channel during a contention based first period of a superframe period of a predetermined length, a link controller to determine a time slot within a second portion of the superframe period to be reserved for contention-free transmission of control messages over the low rate channel in response to the control initiation request message, wherein determining at least one time slot includes determining a time slot duration, wherein the duration of each time slot is determined based on identifying a type of control message exchange sequence contained in the control initiation request message; and a transmitter to transmit a response message over the low rate channel containing information identifying the determined time slot; and a client device comprising; a transmitter to transmit the control initiation request message over the low rate channel, and a receiver to monitor the low rate channel and to receive the response message, wherein the transmitter is further configured to transmit a control message over the low rate channel during the identified time slot of one or more subsequent superframes in response to receiving the response message containing the reserved time slot information, wherein the low rate channel provides both contention-based transmission and contention-free transmission, wherein uncompressed video is transmitted over the high rate channel rather than the low rate channel.
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34. A method of performing medium access control in a system for wireless communication comprising a device coordinator and a plurality of client devices having a lower transmission rate than the high rate channel, the method comprising:
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receiving a control initiation request message over the low rate channel from a client device during a contention based period; determining at least one time slot reserved for contention-free communication by the client device based at least in part on the control initiation request message, wherein determining at least one time slot includes determining a time slot duration, wherein the duration of each time slot is determined based on identifying a type of control message exchange sequence contained in the control initiation request message; transmitting a message over the low rate channel containing information identifying the at least one determined time slot; and transmitting or receiving, at the client device, at least one control message over the low rate channel during the at least one determined time slot.
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Specification