445 results about "Power margin" patented technology

A method can include determining a power headroom report, and transmitting the headroom report. The power headroom report can provide both positive and negative values of power headroom according to the determination, in which negative values indicate the missing power in dB to fulfill requirements, such as those given by current resource allocation and modulation and coding scheme. This method can be implemented by encoding instructions for performing this method on a computer-readable medium, such that the instructions when execute cause the computer to execute the method as a computer process. The method can further include receiving a power headroom report. The method can additionally include allocating radio network resources based on the power headroom report.

The invention provides a method for distributing power resource of a multi-carrier enhanced uplink, which includes the steps that: a wireless network controller configures maximum uplink transmitted power of a user terminal for a base station; the wireless network controller configures allowable maximum uplink transmitted power for the user terminal and expected reference received power of each carrier; the user terminal reports dispatching information including remained power of each carrier; the base station, after receiving the reported dispatching information from the user terminal, distributes power for each carrier according to the reported dispatching information and the maximum uplink transmitted power. Therefore, by adopting the method of the invention, the remained power of each carrier of UE can be concerned without transcending the capacity of the UE; furthermore, the method of the invention can be applied to a TD-SCDMA system.

According to one embodiment of the present invention, a method for reporting power headroom in a user equipment of a multi-carrier system, includes receiving a physical downlink control channel (PDCCH) signal comprising uplink resource allocation information from a base station; transmitting at least one of a physical uplink shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal to the base station in a predetermined subframe based on the uplink resource allocation information in accordance with a transmission mode; calculating one or more power headroom values for the predetermined subframe in accordance with the transmission mode; and transmitting a report message comprising the one or more power headroom values to the base station, wherein the user equipment reports its first and second type power headroom values when operating in transmission mode A, or reports its first type power headroom value when operating in transmission mode B.

Methods and apparatus are provided for reporting a Power Headroom (PH) of a User Equipment (UE) in a wireless communication system having a plurality of aggregated uplink carriers. The PH is calculated for a Power Headroom Report (PHR)-triggered uplink carrier. A PHR having the PH and an identifier of the PHR-triggered uplink carrier is generated, and the PHR is transmitted to a network. Also, a PHR having the PH is generated, and the PHR is transmitted to a network over one of a plurality of PHR-transmitting uplink carriers configured to correspond to the PHR-triggered uplink carrier.

A method and apparatus of reporting a power headroom in a wireless communication system is provided. A user equipment determines a power headroom based on a configured transmit power and transmits a power headroom report to a base station. The power headroom report includes a power headroom level indicating the power headroom and a backoff indicator indicating whether the user equipment applies power backoff due to power management.

A method and an apparatus for improving power efficiency of a User Equipment (UE) by using channel state information between a Node B and the UE and power headroom information of the UE in a mobile communication system. The method includes acquiring power information in relation to transmission powers of UEs; arranging the UEs in a sequence based on the power information; determining, for each UE according to the arranged sequence, whether a first reception power of a Node B exceeds a second reception power; allocating a resource area including partially consecutive sub-carriers to at least one corresponding UE when the first reception power exceeds the second reception power; allocating a resource area including entirely consecutive sub-carriers to at least one corresponding UE when the first reception power does not exceed the second reception power; and transmitting resource allocation information indicating the allocated resource area to the each UE.

A base station apparatus efficiently controls transmission of an uplink signal to a mobile station apparatus. A transmission power setting unit sets transmission power for a physical uplink shared channel using one of a plurality of calculated path losses. A power headroom generation unit generates a first power headroom and a second power headroom, wherein the first power headroom is information associated with a margin of transmission power and produced using a band width of a resource allocated for the physical uplink shared channel and the path loss used in the setting of the transmission power for the physical uplink shared channel, and the second power headroom is information associated with a margin of transmission power and produced, without depending on the band width of the resource allocated for the physical uplink shared channel, using a path loss that is one of the plurality of calculated path losses but that is not used in the setting of the transmission power for the physical uplink shared channel.

A method of transmitting a power headroom (PH) by a user equipment (UE) in a multi-carrier system is provided. The method includes: receiving power determination information from a base station (BS); determining a plurality of maximum transmission power values for a plurality of serving cells by using the power determination information and a UE specific parameter; determining a plurality of PHs on the basis of the plurality of maximum power transmission values; and transmitting the plurality of maximum transmission power values and the plurality of PHs to the BS. Accordingly, since the maximum transmission power value and the power headroom information are provided to the BS, reliable carrier aggregation scheduling can be induced, thereby being able to improve uplink transmission capability.

Various aspects of the disclosure relate to reporting a power limit along with an indication of at least one constraint upon which the power limit is based. In some aspects, the constraint is a radio frequency (RF) exposure constraint. For example, a power headroom limit calculated by a first apparatus may be constrained by a specific absorption rate (SAR) limit or a maximum permissible exposure (MPE) limit. The first apparatus may thus report to a second apparatus the current power headroom limit of the first apparatus along with an indication of whether the power headroom limit is constrained by an SAR limit or an MPE limit (e.g., as opposed to being constrained by a maximum transmit power limit). The second apparatus may then schedule the first apparatus taking into account the power headroom limit and the corresponding constraint (e.g., maximum power or SAR/MPE).

The invention discloses a method for processing power headroom and a terminal thereof, wherein the method comprises: when transmitting a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH) on subframe i and component carrier group j, the terminal measures power headroom on the subframe i and the component carrier group j; the terminal reports the power headroom to the base station and indicates the type of the reported power headroom when reporting. The invention specifically indicates the type to which the power headroom belongs by reporting the type while reporting the power headroom, thereby avoiding confusion.

Disclosed is a terminal device for transmitting a power headroom report (PHR) in a multi-carrier communication system, and a method for same. The terminal device for transmitting a power headroom report (PHR) in a multi-carrier communication system comprises a transmitter and a processor. The transmitter transmits, to a base station, a power headroom report for one or more active component carriers allocated to user equipment from among multiple carriers. The processor controls the transmitter such that the transmitter transmits the power headroom report including a first type of power headroom information calculated using the power value of a physical uplink shared channel (PUSCH) of the main component carrier among the active component carriers, and a second type of power headroom information calculated using the power value of the PUSCH and the power value of a physical uplink control channel (PUCCH) of the main component carrier.

The invention relates methods for maximum output level reporting by a mobile terminal in a mobile communication system. The invention is also providing apparatus for performing these methods, and computer readable media the instructions of which cause the apparatus to perform the methods described herein. In order to allow for maximum output level reporting, a power management related power backoff value is first calculated for one radio technology by referring to a reception quality level set for communication via the other radio technology; thereafter a lower and upper bounds of a maximum output power level is calculated, then the maximum output power level (P_CMAX) for communication is set within the determined lower and upper bounds and finally the set maximum output power level is reported to a base station wherein the lower bound (P_{CMAX<sub2>—</sub2>L}) may be calculated using MPR=0 dB, A-MPR=0 dB, and optionally ΔT_c=0 dB.

An apparatus and method for transmitting maximum transmit power information in a multi-component carrier system. A method for transmitting power information regarding a component carrier includes: calculating power headroom which can be additionally output from an activated uplink component carrier; calculating maximum transmit power configured for the activated uplink component carrier; generating a medium access control (MAC) message including a first field indicating the power headroom and a second field indicating the maximum transmit power; and transmitting the MAC message to a base station (BS). The BS can know about maximum transmit power of each uplink component carrier, preventing excessive uplink scheduling to thus reduce interference. Also, the BS can clearly know about to which uplink component carrier maximum transmit power is related.

One disclosure of the present specification provides a method for receiving downlink data in a wireless communication system supporting 256 QAM. The method for receiving downlink data in a wireless communication system supporting 256 QAM comprises the steps of: receiving configuration information about power back-off; receiving downlink data transmitted on the basis of the configuration information about power back-off; and demodulating the received downlink data on the basis of the configuration information about power back-off, wherein the configuration information about power back-off may comprise information related to at least one of the following: whether to apply power back-off, the reduced amount of power of downlink data by power back-off, a frame index to which power back-off is applied, a subframe index and a resource to which power back-off is applied.

A power distribution system is dynamically and adaptively configured in real-time to improve energy efficiency, reliability and power quality, particularly if the system includes renewable sources and storages. An optimal multi-objective scheduling and partitioning method is provided to partition the system into self-sufficient sections (SSS) through optimally combination of adjacent basic switching sections (BSS). The SSSs enable system operating at a lower cost, with less power losses, more energy efficiency, improved power quality, and sufficient transient security. The method uses two storage based transient security indices, storage compensation power margin (SCPM) and storage compensation energy margin (SCEM) evaluate the transient stability margin of distribution system. A minimal stability margin is used to ensure that the system remains stable when subject to large unexpected load deviations.

The present disclosure relates various embodiments for improving power headroom reporting for UEs being in an enhanced coverage mode. The UE may be configured to always transmit a virtual power headroom report to the eNB, when operating in the enhanced coverage mode. Or, the UE may be configured to always transmit a virtual power headroom report to the eNB, when operating in the enhanced coverage mode and at the same time being power limited. Moreover, the UE may determine a repetition level for transmissions in the uplink and/or may determine a repetition level for transmissions in the downlink. The power headroom report can then be used to transport this information (either one of, or both of, the uplink/downlink repetition levels), by using predefined codepoints in the power headroom report.

In a system including at least one base station device, the base station device efficiently controls uplink signals. A mobile station device includes a path loss calculation unit 4051 configured to calculate path losses, each based on one of a plurality of types of reference signals received by a reception processing unit 401, a transmit power setting unit 4053 configured to set a desired transmit power for an uplink signal using the path losses calculated by the path loss calculation unit 4051, and a power headroom control unit 4055 configured to generate a power headroom using the desired transmit power set by the transmit power setting unit 4053, the power headroom being information concerning transmit power to spare, and configured to control transmission of the power headroom. The power headroom control unit 4055 independently controls a power headroom transmission process that uses each of the path losses calculated based on the plurality of types of reference signals, using an independent parameter for each power headroom transmission process.

The embodiment of the invention discloses a power control method and terminal equipment. The method includes the following steps: receiving configuration information sent by a base station, wherein the configuration information includes uplink power control parameters; estimating the transmitting power of an uplink shared channel of a beam set where the terminal equipment is located according to the uplink power control parameters; calculating the power headroom of the beam set where the terminal equipment is located according to the maximum transmitting power of the terminal equipment and thetransmitting power of the uplink shared channel of the beam set where the terminal equipment is located; generating a power headroom report according to the power headroom of the beam set where the terminal equipment is located, and sending the power headroom report to the base station; and calculating the power headroom of the beam set in a beam domain, and sending the power headroom to the basestation in the form of the power headroom report to ensure that the base station adjusts the power of the terminal equipment side. Based on the above method, the problems of increased interference between the terminal equipment, insufficient resource scheduling or decreased uplink throughput and the like caused by inaccurate power control can be avoided.