Resource Reservation Control (RRC) Decision Making Process for VideoStream Admission in Cisco Unified Wireless Network

RRC Decision Making Process for VideoStream Admission

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Question

Resource Reservation Control (RRC) provides enhanced capabilities to manage admission and policy controls when deploying VideoStream on a Cisco Unified Wireless Network.

Which statement correctly states the decision making process RRC goes through to admit or deny a client from joining a stream?

Answers

A. RRC initiates admission and policy decisions based on the radio resource measurements, traffic statistics measurement, and system configurations. The WLC initiates RRC requests to the APs for the IGMP join.

B. The WLC processes IGMP join requests after checking all the parameters, including client count, channel utilization, latency, QoS, and client link rates.

C. RRC algorithm periodically checks if conditions have changed. If a policy is violated, the client will be denied to the stream immediately. When the condition improves, the client will be admitted to join again.

D. RRC algorithm will check and ensure the conditions are optimal before the client gets admitted. If the conditions are only partially satisfied, the client will be admitted but will have a better QoS priority to protect the stream quality.

E. RRC is a control mechanism to ensure good connection quality for a video stream via multicast. Clients that do not satisfy all conditions will always be admitted.

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Explanations

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A. B. C. D. E.

The correct answer is A.

Resource Reservation Control (RRC) is a protocol used in video streaming over wireless networks to provide admission and policy control for clients. RRC initiates admission and policy decisions based on several factors including radio resource measurements, traffic statistics measurement, and system configurations.

In a Cisco Unified Wireless Network, the Wireless LAN Controller (WLC) initiates RRC requests to the Access Points (APs) for the Internet Group Management Protocol (IGMP) join. The IGMP join is used to request a specific multicast stream from a multicast group. When a client sends an IGMP join request to join a multicast stream, the WLC processes the request and checks all the parameters, including client count, channel utilization, latency, QoS, and client link rates.

The RRC algorithm periodically checks if conditions have changed. If a policy is violated, the client will be denied to the stream immediately. When the condition improves, the client will be admitted to join again. This ensures that clients that do not satisfy all conditions are not admitted to the multicast stream and that the stream quality is protected.

In summary, RRC is a protocol used to provide admission and policy control for video streaming over wireless networks. It ensures that clients that do not satisfy all conditions are not admitted to the multicast stream and that the stream quality is protected. The decision-making process of RRC is initiated based on radio resource measurements, traffic statistics measurement, and system configurations. The WLC initiates RRC requests to the APs for the IGMP join.

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