555 results about "Uplink power control" patented technology

An uplink power control method and apparatus of a terminal in a mobile communication system are provided. The method includes receiving, by the terminal, a location parameter corresponding to at least one antenna selected among a plurality of antennas distributed in a service area of a base station, each of the plurality of antennas being connected to the base station; and calculating uplink power based on the location parameter.

A communication system optimizes cell edge performance and spectral efficiency by a first step of measuring, by the Node B, at least one system performance metric. A next step includes sending, by the Node B, an indicator for the at least one system performance metric measurement. A next step includes receiving the indicator for the at least one system performance metric measurement. A next step includes determining an adaptive power control parameter based on the at least one system performance metric measured by the Node B and system performance metrics measured by at the least one other neighboring Node B. A next step includes using the adaptive power control parameter to update an uplink transmit power level for at least one user equipment served by the Node B.

A method for maintaining system interference at a low level when two or more users use one resource region in a wireless mobile communication system is provided. To control an uplink transmission power in a broadband wireless mobile communication system in multi-cell environments, information regarding the number of users who share an uplink time-frequency resource region is received from a base station, a power adjustment value is calculated based on the received number of users, and the uplink transmission power is determined by reflecting the calculated power adjustment value in a reference transmission power. Here, when only one mobile station uses the uplink time-frequency resource region, the reference transmission power is equal to a transmission power of the mobile station.

In a system having a base station transmitter for transmitting data blocks to one or more mobile stations over a radio link, there is a method for determining an uplink transmit power level at which to transmit a current data block over a radio link from the mobile to the base transmitter station. The method evaluates airlink quality measurements in the radio link over a measurement interval, wherein each time a message is sent to the mobile station, it is evaluated whether a specified number of uplink blocks have been transmitted by the mobile station since the start of the measurement interval. Based on the evaluated airlink quality measurement, the method determines the uplink transmit power level that the mobile should be using for the current block, and adjusts the transmit power level, if necessary, for the current block.

An apparatus and method for changing an uplink power control scheme according to mobile status in a TDD mobile communication system are provided. A subscriber station transmits to a base station a power control change request message including information about a requested power control scheme. Upon receipt of the power control change request message, the base station selects a power control scheme for the uplink of the subscriber station and transmits to the subscriber station a power control change command message including information about the selected power control scheme. The subscriber station extracts, upon receipt of the power control change command message from the base station, the power control scheme information from the power control change command message and selects a power control scheme according to the extracted information.

Techniques are described that provide uplink power control techniques that can support different uplink multi-input multi-output (MIMO) transmission schemes. Open and closed loop power control schemes can be used to prescribe the power level of the mobile station.

In a system having a base station transmitter for transmitting data blocks to one or more mobile stations over a radio link, there is a method for determining an uplink transmit power level at which to transmit a current data block over a radio link from the mobile to the base transmitter station. The method evaluates airlink quality measurements in the radio link over a measurement interval, wherein each time a message is sent to the mobile station, it is evaluated whether a specified number of uplink blocks have transmitted by the mobile station since the start of the measurement interval. Based on the evaluated airlink quality measurement, the method determines the uplink transmit power level that the mobile should be using for the current block, and adjusts the transmit power level, if necessary, for the current block.

A communication system optimizes cell edge performance and spectral efficiency by determining an adaptive power control parameter based on system performance metrics measured by a serving Node B and further measured by, and reported to the serving Node B by, neighboring Node B's. The adaptive power control parameter is then used to determine an uplink transmit power of a user equipment (UE) served by the serving Node B. The uplink transmit power may be determined by the Node B and then conveyed to the UE, or the Node B may broadcast the adaptive power control parameter to the UE and the UE may self-determine the uplink transmit power. In addition, as a frequency reuse factor of one has been proposed for such communication systems, interference levels may be even further improved by employment of an intra-site interference cancellation scheme in the sectors serviced by the Node B.

The invention discloses an uplink power control method, which is used for ensuring that a total transmission power of terminal equipment within a sub-frame does not exceed a maximum transmission power by carrying out power control on an uplink channel with different uplink transmission time so as to ensure that a system can work normally. The uplink power control method comprises the following steps of: determining a target emission power of each uplink channel/signal which is transmitted in a current uplink sub-frame by the terminal equipment; and carrying out the power control on the target emission power of each uplink channel/signal which is transmitted in the current uplink sub-frame by the terminal equipment according to uplink transmission time advance amounts of an uplink carrier wave of each uplink channel/signal and a sequence of the uplink transmission time advance amounts from large to small, so that the total emission power of the terminal equipment at the current uplink sub-frame at any time does not exceed a pre-set maximum emission power after the power control is satisfied. The invention further discloses a device for realizing the method.

The invention provides a method, user equipment and an access point of controlling uplink power. The method comprises respectively adopting different uplink power control mechanisms to carry out power control to different uplink signals to confirm own transmitting power of different uplink signals, and respectively sending different uplink signals with the confirmed transmitting power. Corresponding uplink power control mechanisms can be adopted aiming at different uplink signals so as to send different uplink signals with suitable transmitting power, and therefore the accuracy of information channel measurement carried out by different access points through corresponding uplink signals is improved.

Disclosed is an uplink power control method, for controlling that the sum of transmit power of all uplink channels in a sub-frame does not exceed maximum transmit power allowed by UE. The method comprises: the UE determining the transmit power of uplink channels on each carrier; for each frequency band, the UE judging whether the sum of the transmit power of the uplink channels on the carriers in the same frequency band exceeds the maximum transmit power of the frequency band; if not, the UE maintaining the calculated transmit power of the uplink channels on each carrier; and if yes, the UE reducing the transmit power of the uplink channels on the carriers in the frequency band based on the maximum transmit power of the frequency band, so as to ensure that the sum of the transmit power of the uplink channels on the carriers in the frequency band does not exceed the maximum transmit power of the frequency band and that the sum of the transmit power of the uplink channels in all the frequency bands does not exceed the maximum transmit power allowed by the UE. Also disclosed is a device for implementing the method.

The invention discloses an uplink power control method, equipment and system. The method comprises the steps that network side equipment configures at least two sets of uplink power control parameters corresponding to uplink signals for user equipment; the user equipment is informed with the configured sets of uplink power control parameters, so that the user equipment determines the emission power of the uplink signals. According to the technical scheme, the uplink emission power can be controlled flexibly.

The present disclosure relates to a communication method and system for converging a 5^th-Generation (5G) communication system for supporting higher data rates beyond a 4^th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a method for uplink power control, which is applied to a User Equipment (UE), and the method includes: determining a timing between a power control command and a Physical Uplink Control Channel (PUCCH), which adopts the power control command to control power. The present disclosure also provides a corresponding device.

The invention discloses an uplink power control method, which is used for realizing power control over uplink channels with different uplink transmission times so as to ensure that the total transmit power of terminal equipment in a sub-frame does not exceed maximum transmit power and that a system can normally work. The method comprises the following steps that: the terminal equipment determines the target transmit power of each uplink channel/signal transmitted in a current uplink sub-frame; the terminal equipment divides the transmission time of the uplink channels/signals in the current uplink sub-frame into a plurality of transmission time buckets, wherein the uplink channels/signals at any moment in each transmission time bucket are the same, and the uplink channels/signals in each transmission time bucket are incompletely the same as those in the other transmission time buckets; and in each transmission time bucket, the terminal equipment performs the power control on the target transmit power of the uplink channels/signals transmitted in the transmission time bucket to ensure that the transmit power sum of the uplink channels/signals transmitted in the transmission time bucket does not exceed the preset maximum transmit power of the terminal equipment after the power control. The invention also discloses a device for implementing the method.

A per-layer and per-antenna uplink power control method for MIMO transmission of PUSCH in a Long Term Evolution-Advanced (LTE-A) system is provided. A transmit power for a plurality of transmit antennas is calculated based on a power control parameter received in a downlink. Uplink data is transmitted through the plurality of transmit antennas by applying the transmit power to each of a plurality of codewords.

The embodiment of the invention relates to the technical field of wireless communication, particularly relates to a method and a device of the uplink power control, used for realizing the uplink power control of UE (user equipment) in a scene of inter-band CA. The method provided by the embodiment of the invention comprises the following steps: determining a transmitting power value of an uplink channel of each carrier wave by the user equipment; when the sum of the transmitting power values of all the uplink channels in all frequency bands is larger than the maximum transmitting power value allowed by the user equipment, reducing the power according to the maximum transmitting power value allowed by the user equipment and a power reduction proportionality factor corresponding to each frequency band so that the sum of the reduced transmitting power values of all uplink channels in all the frequency bands is not larger than the maximum transmitting power value allowed by the user equipment. The uplink power control of the UE can be realized in the scene of inter-band CA by adopting the method and the device provided by the embodiment of the invention.

The invention discloses an uplink power control method which comprises the following steps: determining uplink power regulation parameters, wherein the uplink power regulation parameters include a channel type and a power control value; and carrying the uplink power regulation parameters in an independent power control signaling in a preset format, and transmitting to the terminal so that the terminal can carry out uplink power control based on the uplink power regulation parameters. By using the invention, bits do not need to be reserved for a transmit power control (TPC) command word in each downlink control information (DCI) format, thereby reducing the consumption of physical resources.

A system and method for uplink power control for aggregated channels in a communication network includes a step 300 of defining power scaling parameters to be used to derive power scaling factors to be applied to associated aggregated uplink channels. A next step 302 includes providing the power scaling parameters to user equipment. A next step 304 includes applying power scaling factors derived from the power scaling parameters to the associated aggregated uplink channels when the user equipment will exceed a maximum transmit power.

The present invention discloses an uplink power control method and a network side device to enable users to reduce power loss of wireless terminals to acquire the same transmission rate. In the present invention, a network side selects a MCS for a corresponding wireless terminal according to measured uplink SINR and maximum BLER threshold and notifies the wireless terminal to reduce its uplink transmission power while a difference between the SINR and a SINR needed for the maximum BLER threshold of the MCS. While the network side notifies the MCS selected by the wireless terminal, the network side informs the wireless terminal of reducing its uplink transmission power by dispatching an uplink control command. When the wireless terminal receives one uplink power control command, the wireless terminal reduces its uplink transmission power by one step length.

The invention discloses an uplink power control method and a system of an LTE (Long Term Evolution) system, wherein the method comprises the following steps: the average interference lower limit M of user equipment on a neighbor area is determined by a base station, the average interference upper limit M' of the user equipment on the neighbor area is allocated by the base station, and then a link loss compensation coefficient beta of the base station is determined according to the average interference upper limit and the average interference lower limit of the user equipment on the neighbor area and the link loss of the user equipment; power authorized delta'TF(i) on a unit resource block when the neighbor area is interfered is computed and considered by the base station according to the link loss compensation coefficient beta, and then resource block number MPUSCH(i) occupied by a physical uplink shared channel (PUSCH) and a modulation coding mode are obtained according to the power authorized delta'TF(i); the difference f(i) of the resource block number, the modulation coding mode, the actual signal to interference and noise ratio and the target signal to interference and noise ratio is issued to the user equipment through uplink authorization, the deltaTF(i) is obtained through computation and lookup by the user equipment according to the resource block number and the modulation coding mode, and then the transmission power is adjusted by the user equipment according to the deltaTF(i), the f(i) and the MPUSCH(i).