Systems and methods for reliable broadcast and multicast transmission over wireless local area network
First Claim
Patent Images
1. A method for broadcasting a data burst, the method comprising:
- marking each of a first number of frames in the data burst to identify each frame of the first number of frames as a reliable broadcast/multicast (RBM) frame, wherein a second number of frames in the data burst are broadcast/multicast (BM) frames not marked to be identified as the RBM frame;
transmitting a message to a station for collision avoidance;
receiving a response to the message from the station;
transmitting each RBM frame in the data burst separated by a short interframe space (SIFS) only after the transmitting of the message and the receiving of the response; and
transmitting each BM frame in the data burst separated by the SIFS before or after the transmitting of the message.
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Abstract
Broadcast and multicast (BM) systems have not been reliable in the wireless local area networks. Higher bandwidth and more reliable BM transmissions are necessitated by video and audio applications. A class of BM reliable frames is transmitted at a higher rate. The access point performs some rudimentary collision avoidance to enhance reliability, and individual stations are given the ability to send feedback to the access point regarding the quality of the transmission.
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Citations
26 Claims
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1. A method for broadcasting a data burst, the method comprising:
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marking each of a first number of frames in the data burst to identify each frame of the first number of frames as a reliable broadcast/multicast (RBM) frame, wherein a second number of frames in the data burst are broadcast/multicast (BM) frames not marked to be identified as the RBM frame; transmitting a message to a station for collision avoidance; receiving a response to the message from the station; transmitting each RBM frame in the data burst separated by a short interframe space (SIFS) only after the transmitting of the message and the receiving of the response; and transmitting each BM frame in the data burst separated by the SIFS before or after the transmitting of the message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for broadcasting a reliable broadcast/multicast (RBM) burst, the method comprising:
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marking each frame in the RBM burst to identify each frame as reliable; transmitting a message to a station for collision avoidance; receiving a response from the station; and transmitting each frame in the RBM burst separated by a short interframe space (SIPS) after receiving the response; wherein the transmitting each frame begins after a set interval after a target beacon transmission time (TBTT), wherein the set interval is equal to an RBM transmit opportunity (TXOP) start interval plus a non-negative multiple of an RMB TXOP service interval. - View Dependent Claims (14)
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15. An access point configured for broadcasting a data burst, said access point comprising:
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a processor; a wireless network interface device; and a memory comprising instructions; said instructions causing the processor to; mark each of a first number of frames in the data burst to identify each frame of the first number of frames as a reliable broadcast/multicast (RBM) frame, wherein a second number of frames in the data burst are broadcast/multicast (BM) frames not marked to be identified as the RBM frame; cause the wireless network interface device to transmit a message to a station for collision avoidance; cause the wireless network interface device to receive a response to the message from the station; cause the wireless network interface device to transmit each RBM frame in the data burst separated by a short interframe space (SIFS) only after the transmitting of the message and the receiving of the response; and cause the wireless network interface device to transmit each BM frame in the data burst separated by the SIFS before or after the transmitting of the message. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. An access point configured for broadcasting a reliable broadcast/multicast (RBM) burst, the access point comprising:
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a processor; a wireless network interface device; and a memory comprising instructions; said instructions causing the processor to; mark each frame in the RBM burst to identify each frame as reliable; cause the wireless network interface device to transmit a message to a station for collision avoidance; cause the wireless network interface device to receive a response to the message from the station; and cause the wireless network interface device to transmit each frame in the RBM burst separated by a short interframe space (SIFS) after receiving the response; wherein said instructions causing the processor to cause the wireless network interface device to begin transmitting each frame of the RBM burst after a set interval after a target beacon transmission time (TBTT), wherein the set interval is equal to an RBM transmit opportunity (TXOP) start interval plus a non-negative multiple of an RMB TXOP service interval. - View Dependent Claims (24)
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25. A method for broadcasting a reliable broadcast/multicast (RBM) burst, the method comprising:
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marking each frame in the RBM burst to identify each frame as reliable; transmitting a message to a station for collision avoidance; receiving a response to the message from the station; and transmitting each frame in the RBM burst separated by a short interframe space (SIFS) after receiving the response; wherein the message is a NULL frame and the response is an acknowledgement frame.
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26. An access point configured for broadcasting a reliable broadcast/multicast (RBM) burst, the access point comprising:
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a processor; a wireless network interface device; and a memory comprising instructions; said instructions causing the processor to; mark each frame in the RBM burst to identify each frame as reliable; cause the wireless network interface device to transmit a message to a station for collision avoidance; cause the wireless network interface device to receive a response to the message from the station; and cause the wireless network interface device to transmit each frame in the RBM burst separated by a short interframe space (SIFS) after receiving the response; wherein the message is a NULL frame and the response is an acknowledgement frame.
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Specification