66results about How to "Reduce uplink interference" patented technology

A mobile communication system using an enhanced uplink dedicated transport channel transmits data at a relatively low effective data rate through autonomous transmission. Data transmission time points for user equipments (UEs) have different values in the autonomous transmission and therefore uplink interference is reduced. An autonomous transmission period N and the number of autonomous transmissions k are determined such that each UE performs the autonomous transmission. A Node B and each UE are notified of possible autonomous transmission time points based on the determined autonomous transmission period N and the determined number of autonomous transmissions k through signaling. The UE transmits the uplink data without the Node B's scheduling at the possible autonomous transmission time points.

The invention discloses a resource releasing method. An evolved NodeB (eNB) sends a downlink SPS (Semi-Persistent Scheduling) resource releasing command to user equipment (UE) through physical downlink control channel (PDCCH) at a moment corresponding to the SPS, and temporarily reserves an uplink feedback channel corresponding to the corresponding downlink SPS resource; if the eNB receives feedback of the downlink SPS resource releasing command of the PDCCH from the UE but does not receive feedback of an SPS data channel from the UE, the corresponding downlink SPS resource is successfully released. Meanwhile, the invention further discloses a resource releasing device capable of improving the reliability of SPS release. The invention further discloses a resource allocating method and a network apparatus, which can allocate the resource that the UE releases due to uplink loss of synchronism to the UE so as to perform successive normal data transmission. The invention further discloses a resource reserving method and a resource reserving device, which can ensure timely sending of the data of high-priority services.

A method of providing interference avoidance in uplink CoMP may include generating an orthogonal frequency division multiplexing (OFDM) symbol for uplink transmission to coordinated multi-point (CoMP) cells, and providing a cyclic-prefix and a cyclic-postfix for the OFDM symbol generated to reduce uplink interference without backhaul transmission for delay or timing advance information. A corresponding apparatus and computer program product are also provided. An alternative method of providing interference avoidance in uplink CoMP may include measuring timing differences between downlink signals received at a mobile terminal in connection with coordinated multi-point (CoMP) transmission from a serving cell and one or more coordinating cells and adjusting uplink transmission timing for signals to be transmitted from the mobile terminal based on the timing differences measured. A corresponding apparatus and computer program product are also provided.

A method for mitigating interference by a femto Base Station (BS) in a wireless communication system including a macro BS is provided. The method includes receiving information about resources allocated for a channel measurement signal from the macro BS, measuring an UpLink (UL) power by detecting a channel measurement signal transmitted from at least one Mobile Station (MS) to the macro BS based on the received information, determining MSs whose UL powers are greater than or equal to a threshold, and transmitting identification information for the MSs to the macro BS.

The invention provides a method to amplify the uplink power control. A user terminal maintains a closed loop control value, that is, a Pe-base value, to the dispatching network and non-dispatching network using the same carrier resource to transmit when amplifying an uplink access service. The Pe-base value is controlled by the closed loop control command in process of the dispatching network transmission and non-dispatching network transmission on the carrier. The method for amplifying the uplink power control maintains the same closed loop control value Pe-base to the dispatching network and non-dispatching network on the same carrier, greatly improves the adaptability of the dispatching network transmission to the link, effectively reduces the uplink interference, and develops the transmission efficiency.

The utility model relates to a selection method of transmission rate and modulation code and the device, which comprises the following steps: a lowest and a highest transmission block threshold mapping relation is established to get the spread factors used by each transmission block under a certain time slot number and the corresponding modulation code mode; a power relative value mapping relation is established, and the biggest and the smallest values of the transmission block supported by QPSK and 16QAM modulation modes are acquired according to the dispatching information to determine the transmission block range; the power thresholds needed by the smallest value and the biggest value of each transmission block are calculated; the power threshold value proximal to the power permitted value within the power threshold range is selected, and the lowest and the highest transmission block threshold mapping relation is searched to get the supported biggest transmission block; the data quantity waiting for transmission in current cache is checked to determine the selected transmission block; based on the finally selected transmission block, the transmission format combination is set up, and the emission power value corresponding to the finally selected transmission block is calculated. Based on the base station dispatching information and under the premise of ensuring transmission quality, the utility model selects the highest transmission rate as soon as possible to decide the modulation mode and coding rate.

A radio base station apparatus (10) according to the present invention includes: an uplink resource assignor unit (13) configured to assign an uplink resource to a mobile station (01) in response to a random access signal which the mobile station (01) transmits by use of a random access preamble; a random access response signal transmitter unit (14) configured to notify the mobile station (01) of the uplink resource by using a random access response signal; and an uplink scramble decoder unit (16) configured to perform descrambling processing on an uplink signal transmitted from the mobile station (01) by use of the uplink resource, by using an uplink scrambling sequence corresponding to the uplink resource.

The invention discloses an uplink interference coordination method equipment thereof. The method comprises the following steps that: a base station determines an interference area of a user terminal according to a pilot signal intensity of an adjacent cell and a maximum transmitting power spectral density of the user terminal, wherein the pilot signal intensity is measured by the user terminal; a type of the user terminal is determined according to the interference area of the user terminal; and a priority level of the user terminal for using a base station frequency resource is determined on the basis of the type of the user terminal. According to the invention, an interference area of a user terminal is determined through a pilot signal intensity of an adjacent cell and a maximum transmitting power spectral density of the user terminal, wherein the pilot signal intensity is reported by the user terminal; and then on the basis of the an interference situation of the adjacent cell by the user terminal, various priority levels for using frequency resources are determined for different user terminals, so that uplink interference between cells is reduced and thus an occurrence of a phenomenon of frequency overwhelming is reduced.

The embodiment of the invention relates to a method for activating configuration in an LTE system in the field of communication, which comprises the following steps of: constructing activation or deactivation information and carrying the activation or deactivation information in downlink physical control channel (PDCCH) signaling; and sending the PDCCH signaling to user equipment through a PDCCH so as to make the user equipment correspondingly activate or deactivate the configuration according to the activation or deactivation information in the PDCCH signaling. The embodiment of the invention also provides a device for activating the configuration. In the embodiment of the invention, the user equipment is informed to activate or deactivate the corresponding configuration through the downlink physical control channel signaling, so that a network side and the user equipment can synchronously activate / deactivate the corresponding configuration, not only uplink resources can be saved, but also uplink interference among different user equipment can be reduced.

A method is provided in a small cell base station comprising multiple antennas of controlling reception pattern by selecting a subset of the antennas for use. The method comprises determining a ranking value for each of subsets of the antennas dependent upon measurements of received signal quality, and choosing the subset of the antennas for use that provides the highest ranking value

The invention is concerned with the method to adjust definite purpose physics control channel emissive power, includes: the wireless network side off-sets the initial emissive power of the definite purpose physics control channel; the terminal confirms the transmission reliability of the definite purpose physics control channel in a fixed time gap, changes the emissive power off-set value when the channel is fallibility. The invention can dynamic state adjust the emissive power according to the feedback information during the working process by setting the reliability index of the definite purpose physics control channel and judging threshold off-set value, in order to avoid the terminal to use oversized emissive power at the condition of ensuring the channel reliable transmission, reduce the power loss of the terminal and the up interference of the channel.

The invention relates to transmission of timing information concerning the active state of base stations using DTX. First network node (110) for providing timing information of at least one other network node (120), operating in discontinuous transmission mode, for enabling a mobile station (130) to monitor the at least one other network node (120). The first network node (110) comprises a transmitter (730), configured for transmitting a signal comprising timing information, associated with a state switch between dormant state and active state of the at least one other network node (120) and / or associated to a monitoring operation of the at least one other network node (120) to be received by the mobile station (130). Also, a mobile station (130) configured for monitoring the at least one other network node (120) is disclosed.

The invention discloses a method for optimizing uplink capacity and coverage and a base station. The method for optimizing uplink capacity and coverage comprises the following steps: judging whether the coverage index and / or capacity index of a current cell meets a predetermined target requirement according to periodically-acquired service information; if the predetermined target requirement is not meet, further judging whether a target inclination angle exists in a predetermined cell uplink vertical inclination angle range or not; if the target inclination angle exists, performing cell configuration by using the target inclination angle and the uplink power parameter of the current cell; and otherwise, sending an uplink transmitting power lowering request to a neighboring cell base station in order that the coverage index and the capacity index of the current cell meet the predetermined target requirement through reduction of interference to a neighboring cell. An LTE (Long Term Evolution) cell configured with an active antenna reaches desired coverage and capacity targets in different interference environments, and uplink interference to the neighboring cell is reduced, so that service quality in the uplink direction of a whole network is enhanced.

The method features the following: in the repeater uplink, the radio signals are separated based on frequency point; making power detection for each separated signal frequency point signal; converting each route RF signal into a DC envelope signal; according to the GSM physical layer protocol, the control unit makes sampling judgment for each route envelop signals to decide if each channel is occupied; if yes, then opening the uplink; if not, then cutting off the uplink or attenuating the gain of uplink in order to suppress the uplink noise guided into the base station.

To reduce an uplink interference in a network with a first base station of a large output and a second base station of a small output. Detecting the interference, the second base station urges the first base station to hand over a terminal causing it to the second base station. Multiple base stations and one or more terminals exist in this system, each terminal connects with one base station, and a serving base station is changed according to a communication state of each terminal. If the different second base station other than the first base station to which the terminal connects detects a large interference, the second base station will multicast transmit information for urging handover to the base stations except itself. The base station having received the information specifies a terminal giving the interference to the second base station, and makes it to be handed over thereto.

The invention discloses a method for obtaining frequency swing in high speed covering scene and a system thereof. The method includes steps as follows: a mobile terminal sending a random access course, a base station (Node B) obtaining frequency swing information through a physical random access channel (PRACH) and encapsulating the frequency swing information in an extended propagation delay field, and sending to a radio network controller (RNC); Node B extracting the frequency swing information from the Extended Propagatiom Delay field carrying with the frequency swing information sent by RNC after completing the random access course. The method and the system can shorten time for obtaining the frequency swing information.

The invention discloses an uplink interference coordination method of an LET-Advanced relay system. The method includes the following steps that according to interactive high-interference indicating OI information among eNodeBs and RSRP values of all UE, the UE of a cell is divided into the direct-connection UE and the relay UE; after the types of the UE are determined, the cell eNodeBs are used for achieving dynamic spectrum allocation according to the HII information by combining the bandwidth distribution condition of the relay UE of the cell; loop-opening power regulating is carried out on the UE conforming to conditions in the cell and the handling capacity is summed up. Compared with the prior art, frequency domain coordination and power control are combined, interactive information among bases of all cells in the LET-Advanced relay system are utilized for obtaining the use condition of physical resource blocks of adjacent cells and resource blocks which are not interfered are allocated to interfered users. Under the condition that interference on the adjacent cells is not enhanced, transmitting power of the direction-connection users is properly regulated. By means of the uplink interference coordination method of the LET-Advanced relay system, the uplink interference of the LET-Advanced relay system is greatly relieved, the spectral efficiency and the handling capacity of the system are improved and the degree of satisfaction of the direct-connection users are improved.

The invention discloses a method for starting inter-frequency measurement, user equipment and a macro base station used for implementing the method. Whether an inter-frequency measurement is performed is determined in accordance with path loss or uplink channel reception quality between the user equipment and the macro base station or a micro base station, it is ensured that the user equipment requires no additional signal or channel configuration and power consumption of the user equipment is reduced.

The invention is suitable for a communication field, and provides an interference control method and device for a same frequency network of macro and micro base stations. The method comprises that: the micro base station scans wireless environment in which the micro base station is, to obtain a scanning result; the micro base station reports the scanning result to a superior network unit, so as that the superior network unit can determine the a residential area with strongest micro base station signal intensity based on the scanning result, and configures configuration parameters of the residential area to the micro base station; the micro base station respectively judges whether each service channel is carried out service loading by the micro base station; for the service channer of which service is not loaded by the micro base station, the micro base station obtains an upward interference estimator of UE to the micro base station on the service channel, and offsets the upward interference estimator in the upward signal on the received service channel. The method and the device provided by the invention, based on a network structure of same-frequency arranging the macro base station and one or more micro base station which are stacked in a covering range of the macro base station, reduces upward interference caused by UE, and raises network throughput.

The operation method for upward exterior ring power control in E-DCH comprises steps: using Node B to detect upward receiving quality and report to RNC; the RNC arranges the target signal-noise rate for exterior ring power control according to received quality and sends the said rate to Node B, arranges a added E-DPDCH / DPCCH power off-set value according to QoS and upward received quality of E-DCH and DCH and sends the said off-set value to UE and Node B; the RNC determines the emission power for upward E-DPDCH and sends E-DCH data according to power off-set in Rel99 and added power off-set value. This invention can compensate the difference between E-DCH and SIR target of DCH, avoids that SIR target sets SIR target with higher business, decreases upward disturbance, and makes RNC control the physical layer transmission number for E-DCH data.

Suggested are a base station, and a method and a system for controlling full-duplex transmission (FD) which can resolve the issue of additional interference caused by FD at the time of using FD in an actual mobile communication environment for a plurality of terminals.

Apparatus and methods for congestion detection by a user device (UD) in a telecommunication network (TN) are disclosed. One innovation of a method includes measuring at least one parameter related to a radio-communication between a user device (UD) and the telecommunication network (TN) and determining, based on the at least one measured parameter, whether the network is congested or overloaded.

The invention discloses a user equipment state reporting method of maintaining a connecting mode of continuity package in TD-SCDMA and user equipment receiving power reporting method. The state reporting method comprises: the node B and the user equipment promise identifiers of identifications entering or exiting discrete transmitting state in advance; the user equipment transmits the identifiers to the node B through enhancing an up physical channel namely E-PUCH; the node B judges whether the user equipment is in the discrete transmitting state according to the received identifiers. The receiving power reporting method comprises that, the node B and the user equipment promise identifiers of indicating power information in advance; the user equipment transmits the identifiers on an enhanced up physical channel namely E-PUSH and the user equipment receives the power information of the enhanced up HARQ response indication channel namely HICH; the node B extracts the power information carried in E-PUCH according to the received identifiers.

The present invention discloses a repeater control method and device. The method comprises: determining whether the uplink amplification link of the repeater has a terminal access or not; and if the uplink amplification link of the repeater has a terminal access, allowing the uplink amplification link of the repeater to convert to an opening state from the closure state. The problems are solved that the power consumption is large and the uplink link interference is brought in the current communication system when the wireless repeater is used.

A method is disclosed that can be performed in at least one network node which provides wireless communications service for user equipment nodes (UEs). The method includes detecting uplink interference at an interfered network node. Responsive to the uplink interference, an uplink transmission having a defined configuration is initiated from a UE, which is served by a serving network node. The uplink signal is detected using the defined configuration at the interfered network node. The UE is identified responsive to the detected uplink signal as being a contributor to the uplink interference. An uplink transmission by the UE and / or by another UE served by the serving network node is controlled to reduce uplink interference.

User equipment (120), method (500) in a user equipment (120), management node (150) and method (700) in a management node (150), all aiming at saving transmission energy by decreasing transmission power of the user equipment (120). The user equipment (120) is served by a serving radio network node (110) in a heterogeneous wireless communication system (100) comprising the radio network node (110), a relay node (130) and the management node (150).The method (500) comprises transmitting (502) a request for saving transmission energy; receiving (503) a response, comprising an instruction for decreasing the transmission power of the user equipment (120); and decreasing (505) the transmission power of the user equipment (120) when transmitting in the uplink.