Abstract: The invention discloses an ultra-wideband (UWB) positioning system, UWB base stations (BSs), UWB tags and the operation methods thereof. Because the present invention uses a server aware of the positions of all BSs to determine the BSs that performs distance measurement, and the server assigns different time slots to each BS that performs distance measurement, the present invention can avoid collisions between the BSs in the process of distance measurement. Furthermore, because the tag can select a specific time slot to access the UWB positioning system by monitoring the UWB signals in the air, the present invention can reduce collisions between the tags. By carefully planning the system frames and subframes of the time division multiplexing system, and sophisticatedly arranging the operation timings of the BSs and the tags, the present invention provides practical and stable UWB positioning system, BSs, and tags.

Abstract: The invention discloses an ultra-wideband (UWB) positioning system, UWB base stations (BSs), UWB tags and the operation methods thereof. Because the present invention uses a server aware of the positions of all BSs to determine the BSs that performs distance measurement, and the server assigns different time slots to each BS that performs distance measurement, the present invention can avoid collisions between the BSs in the process of distance measurement. Furthermore, because the tag can select a specific time slot to access the UWB positioning system by monitoring the UWB signals in the air, the present invention can reduce collisions between the tags. By carefully planning the system frames and subframes of the time division multiplexing system, and sophisticatedly arranging the operation timings of the BSs and the tags, the present invention provides practical and stable UWB positioning system, BSs, and tags.

Abstract: The invention provides a base station and a data retransmission method thereof. The data retransmission method includes the following steps: determining whether at least one data unit is delivered; in response to the at least one data units being undelivered, calculating data sizes corresponding to undelivered data units; determining a resource grant indication according to the data sizes, the resource grant indication being related to radio resources required for resending the undelivered data units; and sending the resource grant indication. In this way, the data units have a higher chance to be completely retransmitted, and signaling transmission can be reduced, thereby reducing transmission delay.

Abstract: The disclosure provides a communication device including a ground plane, an antenna and an extended grounding structure. The ground plane has a first side and a second side opposite to each other. The antenna is disposed at the first side and has a first feeding end. The extended grounding structure is disposed at the second side and includes a connection portion and a symmetrical structure. The symmetrical structure is electrically connected to the ground plane via the connection portion, wherein the symmetrical structure is symmetrical along a symmetry axis, and an extension line of the symmetry axis passes through the first side and the second side. The disclosure can effectively prevent antenna efficiency from being degraded due to an insufficient size of the ground plane, so as to significantly enhance communication quality.

Abstract: The invention provides a base station and a data retransmission method thereof. The data retransmission method includes the following steps: determining whether at least one data unit is delivered; in response to the at least one data units being undelivered, calculating data sizes corresponding to undelivered data units; determining a resource grant indication according to the data sizes, the resource grant indication being related to radio resources required for resending the undelivered data units; and sending the resource grant indication. In this way, the data units have a higher chance to be completely retransmitted, and signaling transmission can be reduced, thereby reducing transmission delay.

Abstract: The disclosure provides a communication device including a ground plane, an antenna and an extended grounding structure. The ground plane has a first side and a second side opposite to each other. The antenna is disposed at the first side and has a first feeding end. The extended grounding structure is disposed at the second side and includes a connection portion and a symmetrical structure. The symmetrical structure is electrically connected to the ground plane via the connection portion, wherein the symmetrical structure is symmetrical along a symmetry axis, and an extension line of the symmetry axis passes through the first side and the second side. The disclosure can effectively prevent antenna efficiency from being degraded due to an insufficient size of the ground plane, so as to significantly enhance communication quality.

Abstract: A method for processing user equipment (UE) connection under a mixed mode and a femtocell system are provided. The method for processing UE connection is used in a femtocell for processing the connection of a UE. The method includes the following steps. A connection request is received from a low priority UE under a mixed mode. Whether the measurement results corresponding to the femtocell satisfy threshold settings is determined in response to the connection request, wherein the measurement results include a path loss corresponding to the femtocell. If the measurement results satisfy the threshold settings, then the low priority UE is allowed to be connected to the femtocell. In one embodiment, suitable resource allocation, such as the allocation of power and code resource, is provided after the low priority UE is connected to the femtocell under the mixed mode.

Abstract: A motion detection method is provided. The method includes steps of: capturing a current frame, generating a current luma frame according to the current frame, generating a foreground binary image according to the current luma frame, a background luma image and a sensitivity, and updating the background luma frame according to an updating frequency and the sensitivity.

Abstract: A remote communication method is provided. A service end generates a communication message. The service end attaches a first data to the communication message. The first data denotes a content of a first message which comprises a parameter. The service end attaches a second data to the communication message. The second data denotes a content of a second message which is used for substituting the parameter of the content of the first message and for restoring a content of an original message. The service end transmits the communication message containing the first data and the second data to the user end.

Abstract: A congestion control method for a femtocell is provided. When the femtocell is not congested, the femtocell is prompted to enter an access permitted mode. When the femtocell enters the access permitted mode, the femtocell sends a system information modification notification. When the femtocell enters the access permitted mode, the femtocell repeatedly adjusts at least one cell selection parameter or at least one cell reselection parameter to gradually increase a coverage of the femtocell.

Abstract: A downlink orthogonal variable spreading factor (OVSF) code assignment method is provided. It is determined whether a spreading factor required by a service request is greater than a remaining capacity of assignable spreading factors of a code tree. If not, the code tree is searched from a root until a node of a layer corresponding to the required spreading factor is reached and thus defined as a first node. During the searching, when a searched node is unassigned, the searching continues leftward in a lower layer; and when the searched node is in an assigned state, the searching continues rightward in a same layer of the searched node. It is determined, from the first node, whether any assignable code is available in the layer corresponding to the required spreading factor. If available, an assignable code is assigned to a communication service corresponding to the service request.

Abstract: A method for using femtocell as a telephone exchange is provided. The method comprises the following steps. A femtocell registers to a core network via an Internet. The femtocell receives a phone call, and determines whether the phone call comes from the core network or the internal network. If the phone call comes from the core network, then the femtocell automatically answers the call and provides a prompt. The femtocell determines whether an input number of the phone call is an internal extension number. If the input number is the internal extension number, then the femtocell transfers the phone call to a corresponding internal extension.

Abstract: A method for configuring a neighbor list is provided. The method is applied to a femtocell to establish a neighbor list. The method includes steps of: accessing a Public Land Mobile Network (PLMN) list in the femtocell, the PLMN list recording a circuit-switched (CS)/packet-switched (PS) service weighting; determining a weighting parameter with reference to history CS/PS amount information and the CS/PS service weighting of the femtocell; selecting n macrocells from the PLMN list according to the weighting parameter, n being a natural number; and filling the n macrocells into the neighbor list.

Abstract: A radio signal transmission method is used in a radio signal transmission system having a core network (CN), at least one base station and at least one user equipment (UE). After the UE initiates a circuit switch (CS) call, the base station determines whether to activate CS off-loading. If to activate CS off-loading, the base station determines whether identification (ID) codes of all call parties reside on the same base station or on the same group of base stations of the system. If yes, the base station determines whether to off-load only the user-plane data. If yes, the CN controls the signaling and the user-plane data is directly forwarded to another call party; otherwise, the base station processes a signaling and the user-plane data is directly forwarded to another call party via the base station.

Abstract: A pilot power setting method and a femtocell using the same are disclosed. The pilot power setting method is for using in a femtocell which is operated in a closed mode to provide service to a user equipment (UE). The method includes the following steps. A communication link connecting the UE and the femtocell is established. A command is provided to the UE, which returns n items of path loss information to the femtocell in a pre-determined period according to the command, wherein n is a natural number which is greater than 1. A maximum path loss information between the UE and the femtocell is obtained from the n items of path loss information in the pre-determined period. A predicted pilot power is obtained according to the maximum path loss information. A pilot power of the femtocell is set according to the predicted pilot power.

Abstract: A power control method applied to a radio network controller (RNC), a node B and a user equipment is provided. The method include steps of: determining a target block error rate; identify an initial signal-to-interference ratio (SIR) from a history look-up table (LUT) according to the target block error rate; estimating a measured block error rate between the RNC and the node B via the RNC; adjusting the initial SIR with reference to the measured block error rate and the target block error rate to generate an updated SIR; and controlling a signal transmission power of the user equipment with reference to the updated SIR via the node B.

Abstract: A power control method performing a power control operation between a radio network controller and a node B is provided. The method includes steps of: calculating a packet error rate threshold and a base received packet count according to a target block error rate (BLER) and a precision of the target BLER; obtaining an accumulated received packet count and an accumulated packet error count; increasing a target signal-to-interference ratio (SIR) of the node B when the accumulated packet error count is greater than a product of the accumulated received packet count and the packet error rate threshold; decreasing the target SIR when the accumulated received packet count is greater than or equal to a product of the base received packet count and a threshold parameter; and resetting the accumulated received packet count and the accumulated packet error count after the target SIR is adjusted.

Abstract: A transmission method of a femtocell includes the following steps. The femtocell receives and temporarily stores multiple real-time transport protocol (RTP) packets from a UE in a buffer. When the RTP packets are temporarily stored for a time period, the femtocell samples the buffer at a sampling rate to generate multiple CS data packets. The CS data packets include a current CS data packet. When there exists no previous CS data packet received from the UE, the femtocell calculates a timestamp of the current CS data packet according to a current timestamp. When there exists the previous CS data packet, the femtocell calculates the timestamp of the current CS data packet according to the timestamp and a connection frame number (CFN) of the previous CS data packet and a CFN of the current CS data packet.

Abstract: A bandwidth control method is provided. A router is provided to establish a network connection to a remote apparatus. The remote apparatus is allocated with a downlink bandwidth for servicing the gateway. A plurality of downlink packets are received by the gateway. In response to reception of the downlink packets, the gateway transmits a plurality of uplink packets to the remote apparatus to allow the remote apparatus to transmit more downlink packets to the gateway after the remote apparatus acknowledges reception of the uplink packets. A transmission rate of the uplink packets is limited within an uplink threshold by the gateway so that a transmission rate of the downlink packets is smaller than the downlink bandwidth allocated to the remote apparatus. The uplink threshold is determined based on the downlink bandwidth.

Abstract: A video recording method is provided. The method includes steps of: determining a threshold bit rate according to a storage space and an expected recording period; capturing a video data; determining whether a current bit rate is greater than the threshold bit rate; storing a predictive frame of the video data when the current bit rate is not greater than the threshold bit rate; and not storing the predictive frame when the current bit rate is greater than the threshold bit rate.