Abstract:
Methods to provide power control during a soft handover are provided, traditionally, power control is done by setting a target Signal to Interference (and noise) Ratio, SIR/SINR, target or a power target. Herein, and as in 3GPP contribution R1-131608, a rate adaptation method is used instead. The problem occurring during soft handover is that the non-serving cell may decode the UE transmissions better than the serving cell, but the serving cell, without this knowledge, may instead reduce the rate, hence reducing the gain of soft handover. It is therefore proposed to, at the RNC (which knows the HARQ retransmission performance from all cells in the active set) generate an uplink data rate offset value responsive to a retransmission indication, transmitting the uplink data rate offset value to the serving base station for transmission to the wireless terminal. Alternatively to the explicit uplink data rate offset, the RNC does not need to be aware that the UE is operating in rate adaptation mode, thus setting a target SIR or power as conventionally. It is the NodeB that interprets the SIR target changes as rate change commands.
Abstract:
A method and system for setting an initial dedicated physical control channel (DPCCH) power of a secondary carrier after a transmission gap are disclosed. According to one aspect, a method includes determining a filtered DPCCH power of first carrier. The method further includes determining a power offset. The method also includes calculating the initial DPCCH power of the secondary carrier by adding the determined filtered DPCCH power of the first carrier to the determined power offset.
Abstract:
The present disclosure concerns interference congestion control in radio communication networks. Disclosed herein are methods as well radio network nodes. A radio network node may, for example, estimate a neighboring cell interference. The radio network node may also detect a sudden significant increase in the estimated neighboring cell interference. In response to detecting a sudden significant in the estimated neighboring cell interference, the radio network node may also transmit a message to at least one other radio network node. This message may include an indicator indicating to said at least one radio network node to initiate an interference congestion control procedure. Hereby it is made possible to allow for interference congestion control in radio communication networks.
Abstract:
A system and method for improving soft hand-off in a CDMA system uses mobile station location and velocity information to maintain soft hand-off legs with those cells in which the mobile station is more likely to be located. The system and method of the present invention estimates the weighted probability of the mobile station arriving in neighboring cells and produces "bias" values for those cells that the mobile station is more likely to be entering or to be located in. These bias values are used for modifying signal quality values for those cells, and for determining whether the current cell or neighbor cells are to be placed in an active set so as to establish, or maintain, soft hand-off legs. The system and method of the present invention thus chooses those cells which are more likely to be retained as soft hand-off legs and therefore reduces the overall number of soft hand-offs.
Abstract:
A system and method for improving soft hand-off in a CDMA system uses mobile station location and velocity information to maintain soft hand-off legs with those cells in which the mobile station is more likely to be located. The system and method of the present invention estimates the weighted probability of the mobile station arriving in neighboring cells and produces "bias" values for those cells that the mobile station is more likely to be entering or to be located in. These bias values are used for modifying signal quality values for those cells, and for determining whether the current cell or neighbor cells are to be placed in an active set so as to establish, or maintain, soft hand-off legs. The system and method of the present invention thus chooses those cells which are more likely to be retained as soft hand-off legs and therefore reduces the overall number of soft hand-offs.
Abstract:
Systems and methods for controlling uplink (UL) power allocation in a user equipment (UE) operating in a communication network are provided. The method includes: selecting between at least a first UL power allocation technique and a second power allocation technique for use in the UE; and using the selected power allocation technique in the UE to transmit uplink data by allocating transmit power between at least two carriers on which the uplink data is transmitted.
Abstract:
A system and method for improving soft hand-off in a CDMA system uses mobile station location and velocity information to maintain soft hand-off legs with those cells in which the mobile station is more likely to be located. The system and method of the present invention estimates the weighted probability of the mobile station arriving in neighboring cells and produces "bias" values for those cells that the mobile station is more likely to be entering or to be located in. These bias values are used for modifying signal quality values for those cells, and for determining whether the current cell or neighbor cells are to be placed in an active set so as to establish, or maintain, soft hand-off legs. The system and method of the present invention thus chooses those cells which are more likely to be retained as soft hand-off legs and therefore reduces the overall number of soft hand-offs.
Abstract:
A system and method for improving soft hand-off in a CDMA system uses mobile station location and velocity information to maintain soft hand-off legs with those cells in which the mobile station is more likely to be located. The system and method of the present invention estimates the weighted probability of the mobile station arriving in neighboring cells and produces "bias" values for those cells that the mobile station is more likely to be entering or to be located in. These bias values are used for modifying signal quality values for those cells, and for determining whether the current cell or neighbor cells are to be placed in an active set so as to establish, or maintain, soft hand-off legs. The system and method of the present invention thus chooses those cells which are more likely to be retained as soft hand-off legs and therefore reduces the overall number of soft hand-offs.