Enhanced channel access mechanisms for QoS-driven wireless LANs
First Claim
1. A system for providing quality of service driven channel access within a basic service set in a wireless network, the system comprising:
- a) a point coordinator station within the basic service set sending a contention control frame in a contention-free period of a superframe that also includes a contention period, the contention control frame containing;
a1) information relating to a number of available centralized contention opportunities for receiving a reservation request non-data frame in a centralized contention interval following the contention control frame, anda2) information identifying stations from which a reservation request non-data frame was successfully received by the point coordinator station in a preceding centralized contention interval, andb) a non point coordinator station in the basic service set, receiving the contention control frame and sending a reservation request non-data frame in a selected one of the available centralized contention opportunities in the centralized contention interval in response to the received contention control frame, each reservation request non-data frame being sent when the corresponding non point coordinator station has a burst of data frames to send, each reservation request non-data frame indicating an amount of bandwidth requested by the non-point coordinator station sending the reservation request non-data frame for transmitting the burst of data frames.
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Accused Products
Abstract
A method and a system are disclosed for providing quality of service (QoS)-driven channel access within a basic service set (BSS) in a wireless network. A contention control (CC) frame is sent from a point coordinator (PC) station of the BSS. The CC frame contains information relating to a number of available centralized contention opportunities (CCOs) for receiving a reservation request (RR) in a centralized contention interval (CCI) following the CC frame. The CC frame also contains information relating to the identification of stations from which an RR was successfully received by the PC station in a preceding CCI. The CC frame is sent by the PC station during a contention-free period (CFP) of a superframe. The superframe includes a contention-free period (CFP) and a contention period (CP). The CC frame is received at a non-PC station in the BSS.
165 Citations
19 Claims
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1. A system for providing quality of service driven channel access within a basic service set in a wireless network, the system comprising:
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a) a point coordinator station within the basic service set sending a contention control frame in a contention-free period of a superframe that also includes a contention period, the contention control frame containing; a1) information relating to a number of available centralized contention opportunities for receiving a reservation request non-data frame in a centralized contention interval following the contention control frame, and a2) information identifying stations from which a reservation request non-data frame was successfully received by the point coordinator station in a preceding centralized contention interval, and b) a non point coordinator station in the basic service set, receiving the contention control frame and sending a reservation request non-data frame in a selected one of the available centralized contention opportunities in the centralized contention interval in response to the received contention control frame, each reservation request non-data frame being sent when the corresponding non point coordinator station has a burst of data frames to send, each reservation request non-data frame indicating an amount of bandwidth requested by the non-point coordinator station sending the reservation request non-data frame for transmitting the burst of data frames. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for providing quality of service driven channel access within a basic service set in a wireless network, the method comprising:
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a) in a contention-free period of a superframe that also includes a contention period, sending a contention control frame from a point coordinator station of the basic service set, the contention control frame containing; a1) information relating to a number of available centralized contention opportunities for receiving a reservation request non-data frame in a centralized contention interval following the contention control frame, and a2) information identifying stations from which a reservation request was successfully received by the point coordinator station in a preceding centralized contention interval, and b) receiving a reservation request non-data frame at the point coordinator station in one of the centralized contention opportunities of the centralized contention interval, the reservation request non-data frame being sent in a selected one of the available centralized contention opportunities in the centralized contention interval in response to the received contention control frame, the reservation request non-data frame being sent from the non point coordinator station when the non point coordinator station has a burst of data frames to send, and the reservation request non-data frame indicating an amount of bandwidth requested by the non point coordinator station sending the reservation request non-data frame for transmitting the burst of data frames. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for providing quality of service driven channel access within a basic service set in a wireless network, the method comprising:
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a) receiving a contention control frame at a non point coordinator station in the basic service set, the contention control frame being sent from a point coordinator station of the basic service set in a contention-free period of a superframe that also includes a contention period, the contention control frame containing; a1) information relating to a number of available centralized contention opportunities for receiving a reservation request non-data frame in a centralized contention interval following the contention control frame, and a2) information identifying stations from which a reservation request non-data frame was successfully received by the point coordinator station in a preceding centralized contention interval, the contention control frame being sent by the point coordinator station during a contention-free period of a superframe, and sending a reservation request non-data frame in a selected one of the available centralized contention opportunities in the centralized contention interval in response to the received contention control frame, the reservation request non-data frame being sent from the non point coordinator station when the non point coordinator station has a burst of data frames to send, the reservation request non-data frame indicating an amount of bandwidth requested by the non point coordinator station sending the reservation request non-data frame for transmitting the burst of data frames. - View Dependent Claims (16, 17, 18, 19)
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Specification