Abstract:
Systems and methods are provided that facilitate active queue management of internet-protocol data packets generated in a data packet switched wireless network. Queue management can be effected in a serving base station as well as in an access terminal, and the application that generates the data packets can be executed locally or remotely to either the base station or access terminal. Management of the generated data packets is effected via a marking/dropping of data packets according to an adaptive response function that can be deterministic or stochastic, and can depend of multiple communication generalized indicators, which include packet queue size, queue delay, channel conditions, frequency reuse, operation bandwidth, and bandwidth-delay product. Historical data related to the communication generalized indicators can be employed to determine response functions via thresholds and rates for marking/dropping data packets.
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless digital code division multiple access (CDMA) communication system which supports all types of voice communication and data communication using a minimum frequency band for each use.SOLUTION: This system efficiently allocates ISDN bandwidth in quick response to a request from a subscriber. When a subscriber station unit is activated, this system establishes a channel and generates a spectrum spreading code required to support a maximum capacity channel desired by the subscriber station unit. A part of the communication bandwidth is not reserved until it is actually required by the subscriber station unit. A call setup such as assignment of the spectrum spreading code or the like is performed at the beginning of a call from the subscriber station unit, so the subscriber station unit can quickly access a part of a frequency spectrum required to support a required specific application.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for managing radio resources and a base station for implementing the same.SOLUTION: When the total radio resources used in a cell are larger than target radio resources set in advance by an RNC, uplink rates are equally allocated to primary terminals and non-primary terminals by controlling the signal strengths of the primary and non-primary terminals.
Abstract:
PROBLEM TO BE SOLVED: To allow a unicast frame to be reliably used when receiving a frame converted into a unicast frame from a multicast frame in a communication device.SOLUTION: The relay device converts the received multicast frame into a unicast frame, sets a communication rate relatively faster than a prescribed communication rate, and transfers it to the communication device. In so doing, the relay device adds conversion information showing that the conversion has been performed to the unicast frame. On the other hand, when the unicast frame is received from the relay device, the communication device determines whether or not the unicast frame is a frame converted from the multicast frame on the basis of the conversion information added by the relay device which has transferred the unicast frame, and when it determines that it is a converted unicast frame, the received unicast frame is converted into a multicast frame again, and delivered to an application.