Abstract:
The present invention provides a method involving a femtocell in communication with an Internet Protocol Multimedia Subsystem (IMS) network. In one embodiment, the femtocell operates according to code division multiple access (CDMA) standards. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, first authentication information generated by the mobile unit using a first random number broadcast by the femtocell in a global challenge. The method also includes receiving, from a second secure entity in the secure network, at least one security key formed based on the global challenge and second authentication information for uniquely challenging the mobile unit. In one embodiment, the second secure entity is a CDMA-based authentication server. The method further includes providing the security key(s) to the femtocell in response to authenticating the mobile unit based upon the second authentication information.
Abstract:
In sophisticated semiconductor devices, a replacement gate approach may be applied, in which a channel semiconductor material may be provided through the gate opening prior to forming the gate dielectric material and the electrode metal. In this manner, specific channel materials may be provided in a late manufacturing stage for different transistor types, thereby providing superior transistor performance and superior flexibility in adjusting the electronic characteristics of the transistors.
Abstract:
In an H-ARQ system, when the AN is receiving packet data traffic on the RL from an AT and is generating ACKs and NAKs according to the ability of the AN to properly decode such data, the AN gates-off a DRCLock bit within in a sub-packet duration in which an ACK is transmitted on the FL MAC channel. When it receives an ACK, the AT ignores the non-transmitted DRCLock bit in a current sub-packet duration, and assumes that the DRC channel is “good”. When the AN sends a NAK to the AT, it also sends the DRCLock bit. When the AT receives a NAK in a sub-packet duration, it reads and processes whatever DRCLock bit is received during that sub-packet duration. When no data traffic is transmitted on the RL traffic channel, corresponding DRCLock bits are not gated-off by the AN and are transmitted to the AT. The AT then processes the received DRCLock bits. In an alternative embodiment, transmission of DRCLock is totally eliminated.
Abstract:
The present invention provides a method of coordinating transmission by and reception by a plurality of antennas associated with a plurality of radio heads. The method includes determining, at a controller, at least one relative time delay associated with a plurality of backhaul links between the controller and the plurality of radio heads. The method also includes providing information indicative of a first signal over the plurality of backhaul links. The method further includes providing timing information over the plurality of backhaul links. The timing information is determined based on the relative time delay(s) such that the plurality of radio heads can use the provided timing information to coherently transmit the first signal using the plurality of antennas and a plurality of controllers to receive mobile unit transmitted information.
Abstract:
The present invention provides a method implemented in a mobile unit configured to communicate with at least one base station over an uplink. The method includes receiving, at the mobile unit and from the base station, a first attribute indicative of a traffic-to-pilot power ratio and a second attribute indicative of a resource provision limit. The first attribute is formed based on a priority weight associated with best effort communication with the mobile unit. The second attribute is formed based on a maximum throughput associated with best effort communication with the mobile unit. The method also includes modifying an uplink transmission power based upon the first attribute and information indicative of congestion at the base station.
Abstract:
The present invention provides a method involving at least one base station and at least one mobile unit is provided. The method includes receiving rate control information associated with at least one wireless communication channel between the at least one base station and the at least one mobile unit. The method also includes determining at least one outflow rate to the at least one base station based on the rate control information.
Abstract:
A method and an apparatus is provided for monitoring and adjusting a power level of a transmitting component. The method comprises receiving a request from a remote unit to provide a power level associated with a transmitting component, wherein the request is transmitted over a communications protocol. The method includes measuring a power level of a signal provided by the transmitting component in response to receiving the request from the remote unit, and providing the measured power level to the remote unit over the communications protocol.
Abstract:
The present invention provides a method involving a corresponding node and a mobile node having a first session for multimedia communication. The first session includes a plurality of streams having a corresponding plurality of endpoints. The method includes providing, from a network entity, a first message to the corresponding node requesting transfer of at least one of the plurality of stream endpoints to at least one third node. The method also includes providing, from the network entity, at least one second message inviting the at least one third node to accept transfer of the at least one of the plurality of stream endpoints from the mobile node. The method further includes providing, from the network entity, a third message inviting the mobile node to modify the first session to transfer the at least one of the plurality of stream endpoints to the at least one third node.
Abstract:
The present invention provides a method of radio resource allocation. The method comprises associating a plurality of mobile units with a corresponding plurality of scheduling states based on at least one radio resource parameter and at least one rule, associating each mobile unit with one allocation state based on the plurality of scheduling states associated with the mobile units, and allocating radio resource to at least one mobile units based on the allocation states.
Abstract:
The present invention provides a method for controlling mobile unit response messages. One embodiment of the method includes providing, to a mobile unit, at least one message including information indicative of at least one parameter for configuring at least one response to said at least one message for transmission over an access channel.