Management of frame bursting
First Claim
1. A method of data transmission at a node of a contention-based WLAN system, the method comprising:
- (A) determining a first amount of data in a transmission queue corresponding to a first access category; and
(B) obtaining a first transmission opportunity for the first access category using a first variable parameter set (VPS), wherein at least one parameter value in the first VPS is determined based on the first amount.
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Accused Products
Abstract
A method of data transmission employing frame bursting to improve traffic in a WLAN system. According to a representative embodiment of the invention, a variable parameter set, VPS[n], is provided to a channel access function in the process of obtaining a transmission opportunity (TXOP) for a corresponding access category, AC-n, at a wireless station of the WLAN system. The variation of one or more values in VPS[n] is based on the amount of buffered traffic and is preferably performed such that, when a TXOP is granted, AC-n has buffered an amount of traffic suitable for transmission using frame bursting in such a manner that the service and back-off overheads for AC-n are substantially reduced. Due to the overhead reduction, more channel time becomes available to traffic from other access categories and/or wireless stations. For example, bursting video traffic in accordance with the invention may significantly improve best-effort traffic. In addition, less channel time may be lost to collisions.
59 Citations
20 Claims
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1. A method of data transmission at a node of a contention-based WLAN system, the method comprising:
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(A) determining a first amount of data in a transmission queue corresponding to a first access category; and
(B) obtaining a first transmission opportunity for the first access category using a first variable parameter set (VPS), wherein at least one parameter value in the first VPS is determined based on the first amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for a node in a contention-based WLAN system, the apparatus comprising:
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(A) a first buffer configured to queue data corresponding to a first access category; and
(B) a controller adapted to control data transmission at the node, wherein the controller is configured to;
determine an amount of data in the first buffer; and
obtain a first transmission opportunity for the first access category using a first variable parameter set (VPS), wherein at least one parameter value in the first VPS is determined based on the amount of data in the first buffer. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A contention-based WLAN system, including a plurality of nodes configured to transmit data, wherein at least one node includes an apparatus comprising:
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(A) a buffer configured to queue data corresponding to a first access category; and
(B) a controller adapted to control data transmission at the node, wherein the controller is configured to;
determine an amount of data in the buffer; and
obtain a first transmission opportunity for the first access category using a variable parameter set (VPS), wherein at least one parameter value in the VPS is determined based on the amount of data.
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Specification