Abstract:
The present disclosure relates to an uplink congestion control scheme. In one embodiment, an uplink congestion control method is provided, comprising steps of: determining whether or not a congestion status of a serving cell is changed based on a rise over thermal, RoT, measurement; sending to a set of user equipment, UEs, a signaling to indicate the change of the congestion status; and performing an uplink congestion control based on the RoT measurement and with enhanced transmission format combination, E-TFC, reselection by at least one UE from the set of UEs based at least on the signaling.
Abstract:
There is provided a device for filtering a stream of power control commands including power-up and power-down commands for uplink transmit power control in a wireless communication system. The device (100) includes a sequence tester (102) configured to determine whether a power-up command is immediately preceded by a sequence of consecutive power-up commands. The device also includes a command replacer (104) configured to replace, when it is determined that the power-up command is immediately preceded by a sequence of consecutive power-up commands, the power-up command with a power-down command.
Abstract:
A radio network control node that determines the transmit power of a common or shared downlink transport channel regulates that power based on one or more factors. The downlink transmit power regulation makes common downlink transport channel transmissions more efficient and effective and effective in terms of delivering services to users, maximizing capacity, and reducing unnecessary interference. Examples of one or more factors that may be considered in regulating the transmit power on a common transport channel include (but are not limited do) include one or more measurements made by the user equipment of received downlink transmissions such as received signal strength, signal-to-interference ratio, error rates bit error rate and block error, etc. Other potential factors could include current conditions in the cell such as traffic volume and percentage of maximum base station transmit power currently being used. The service(s) requested for each common transport channel user may also be taken into account. The controlling radio network node for the user connection uses one or more of these factors to adapt the downlink transmit power of the common transport channel. That power level adaptation may occur directly or indirectly via another radio network controller or base station node. The transmit power on the common transport channel may be regulated in general, per user connection, block-by-block, etc.
Abstract:
The power levels of signals transmitted by base stations in a communication are controlled. Power level control commands are transmitted from a remote station to base stations from which the remote station receives signals to control the power levels of the signals transmitted by the base stations. A determination is made whether the remote station simultaneously receives a first signal from a first base station and at least one second signal from at least one second base station that include substantially identical message information. The first and second base stations transmit first and second reports of power levels of the first and second signals, respectively, to the controller. The controller compares the first and second reports and transmits first and second commands for adjusting the power levels of the first and second signals to the first and second base stations, respectively. The power level control commands are transmitted from the remote station to the base stations less frequently during macrodiversity to reduce the signalling requirements between the controller and the base stations. Also, the step size of the adjustment of the power levels of the first and second signals by the controller is reduced during macrodiversity to reduce the signalling requirements. This power control method is particularly beneficial for a CDMA system.
Abstract:
The power levels of signals transmitted by base stations in a communication are controlled. Power level control commands are transmitted from a remote stati on to base stations. A determination is made whether the remote station simultaneously receives a first signal from a first base station and at least one second signal from a t least one second base station that include substantially identical message information . The base stations transmit first and second reports of power levels of the first and second signals, respectively, to the controller. The controller compares the first and secon d reports and transmits first and second commands for adjusting the power levels of the first and second signals to the first and second base stations, respectively. Also, th e step size of the adjustment of the power levels of the first and second signals by the controller is reduced during macrodiversity to reduce the signalling requirements.
Abstract:
FIELD: radio engineering; power level control of signals transferred by remote-station base stations during macrodiversity. SUBSTANCE: during macrodiversity first and second base stations transmit messages concerning power level of received signal coming from mobile station to controller. The latter compares messages received and conveys relevant commands for power level adjustment to first and second base stations. Power level control commands are transmitted from remote station to base stations during macrodiversity not so often. Step value for power level adjustment by controller is also reduced during macrodiversity. EFFECT: enhanced control efficiency, reduced requirements to signal exchange between base stations and controller. 12 cl, 6 dwg
Abstract:
Methods of controlling the power levels of transmitted signals in telecommunication systems are described. For example, a remote terminal measures the quality of a received signal, either by determining the frame error rate or the bit error rate, and reports its quality measurement to a network by sending a quality message. The network causes the signal transmitters to adjust their transmit power levels appropriately. Faster power control methods may be combined with slower power control methods for downlink (network to remote terminal) transmissions in various communications scenarios, such as soft hand-overs.