Abstract: A method, apparatus and system for updating location information of an IP address are disclosed. The method includes: receiving an incoming call; searching a pre-stored location database for a location corresponding to the incoming call; searching a pre-stored log database for an IP address corresponding to the incoming call; and updating location information of the IP address stored in an IP database by the location searched out. The present disclosure may be applied when a service provider updates the location information of the IP address in the IP database. Thus, the problem that the location information in the IP database cannot be updated accurately in the prior art is solved.

Abstract: In an open flow system, it is made possible to confirm a flow having succeeded or failed in the registration on a flow table. Specifically, a controller transmits and receives an open flow message to and from a switch. The switch is provided with a flow table which manages flows registered from a controller, and a flow table reading section which reads corresponding data, a flow table control section which performs processing of addition, deletion and modification of a flow entry, and a platform function managing section which determine whether an object flow entry is valid or invalid according to an inquiry from the flow table control section. The flow table has a normal flow table and a save flow table. A valid flow entry which conforms to configuration data of the switch is registered on the normal flow table. An invalid flow entry which does not conform to the configuration data of the switch is registered on the save flow table.

Abstract: By using a discrete Fourier transform equation that is used to transform N data values (N is an integer equal to or greater than one) to N transformation values, a wireless communication apparatus calculates three continuous transformation values from the N data values. Then, the wireless communication apparatus obtains a fixed change in the phase difference from the three calculated transformation values; multiplies the calculated transformation value by a twiddle factor that is obtained from the change in the phase difference; and calculates not-yet calculated transformation values.

Abstract: The present invention discloses a method and an apparatus for compressing and decompressing an IP data packet. The method includes: performing, by a first device, compression processing on IP data in an IP data packet according to a first compression algorithm; and encapsulating, by the first device, the IP data after the compression processing into a packet data convergence protocol (PDCP) data packet, where header information of the PDCP data packet includes identifier information, where the identifier information is used to indicate the first compression algorithm or indicate that the IP data is compressed.

Abstract: A handover method for supporting terminal mobility is provided, wherein, before a target core network node updates bearer information, an access control determination procedure is added. According to the access control determination information provided by the target base station, if it is determined that the bearer supporting a SIPTO or LIPA service is permitted to perform the handover, the target core network node updates the bearer information. If it is determined that the bearer supporting the SIPTO or LIPA service is not allowed to perform the handover, the handover failure is notified as per the bearer not performing the handover, and the bearer information is not updated. Alternatively, during or after the handover to the target network, the bearer release or deactivation is performed for the bearer not performing the handover, so that the UE may re-initiate the bearer establishment process with respect to the bearer not performing the handover.

Abstract: A method includes obtaining a matrix defining a topology of a multi-hop network, where the topology identifies nodes and links between the nodes in the multi-hop network. The method also includes identifying one or more Eigenvalues and/or one or more Eigenvectors of the matrix. The method further includes determining whether the topology of the multi-hop network defines a disconnected network using the one or more Eigenvalues and/or the one or more Eigenvectors. For example, one or more Eigenvalues of the matrix can be identified, and a determination can be made whether a second smallest Eigenvalue equals zero. As another example, Eigenvectors corresponding to two smallest Eigenvalues of the matrix can be identified, and a determination can be made whether the Eigenvectors have opposite zero and non-zero entries such that, for all entries in the Eigenvectors, an ith entry in one Eigenvector is zero while an ith entry in another Eigenvector is non-zero.

Abstract: The present invention reduces the increase of the amount of feedback information, and, regardless of whether the correlation between antennas is high or low, increases the data rate upon MIMO transmission.

Abstract: A base station apparatus that wirelessly communicates with a wireless terminal, including: a determination portion that determines a mode of the wireless terminal that exists in a service area of the base station apparatus; and a setting portion that sets a first mode in which a first period in which the base station apparatus is communicable with the wireless terminal and a second period in which the base station apparatus is incommunicable with the wireless terminal are provided alternately, based on a result of the determination of the determination portion, and sets a length of the second period based on the result of the determination of the determination portion.

Abstract: A method for determining an initial alignment for a frame of input data is provided. A frame for the input data is set, and the frame is synchronized. Specifically, a syndrome check of the frame is performed using a first predetermined number of bits, and a slip of a second predetermined number of bits is requested following the syndrome check. Evaluation of the syndrome check to determine whether the frame is aligned can then be performed in parallel with the slipping. The evaluation and slipping can then be repeated if the frame is misaligned. When the frame is aligned, a lock condition can be indicated, and the slip performed in parallel with the evaluation indicating that the frame is aligned can be deasserted. In addition, when the frame is aligned, error correction on the frame can be performed, and the error corrected frame can be formatted.

Abstract: An identifier management apparatus capable of setting identifier conversion information of a new user without affecting identifier conversion processings of other users, and an identifier management method. The identifier management apparatus converts an identifier given to communication data. Its memory stores multiple hash functions, output values of the hash functions corresponding to the respective plurality of hash functions, multiple entry tables that manage the identifier conversion information indicating a correspondence between the input identifier being an input value of the hash function and an output identifier obtained by converting the input identifier, and a management table for managing a setting status of the identifier conversion information in each entry table.

Abstract: A base station includes a transmit path circuitry to transmit an uplink grant to a subscriber station. The uplink grant indicating a first MCS value for a first codeword transmission and a second MCS value for a second codeword transmission. The base station also includes a receive path circuitry configured to receive a MIMO uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission. ACK/NACK information and RI information are repeated on both the first and second subsets of layers, and CQI is spatially multiplexed on either the first subset or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI is spatially multiplexed onto the subset of layers having a higher MCS value.

Abstract: A network based positioning (NBP) system that improves the accuracy of wireless positioning systems by concurrently performing RTT ranging operations and associated TDOA operations to generate a number of difference measurement values from which the position of a station device (STA) can be determined using, for example, multilateration techniques. Because the RTT values and their corresponding TDOA values both include the turn-around time (TAT) of the STA, subtracting TDOA values from their corresponding RTT values generates difference measurement values that do not include such TAT values of the STA. In this manner, the STA position can be determined without estimating the STA's TAT.

Abstract: A method for reporting a power outage to a communications controller includes detecting the power outage, and selecting a transmission slot from a plurality of transmission slots in order to report the power outage to the communications controller, the transmission slot selected according to a non-uniform probability distribution function, the non-uniform probability distribution function is monotonic with time after the power outage. The method also includes transmitting a first power outage indicator to the communications controller in the transmission slot selected.

Abstract: The present invention relates to a broadband wireless communication system, and disclosed are a method and an apparatus for executing a carrier management process in a broadband wireless communication system which supports multi-carrier. According to one embodiment of the present invention, a method for executing carrier management by a terminal in a communication system which supports the multi-carrier comprises the steps of: receiving a signal which indicates control channel allocation for a 1st carrier from a base station; receiving a signal which indicates control channel de-allocation for a 2nd carrier from the base station; activating the 1st carrier if the 1st carrier on which the control channel allocation is indicated is in an inactivate state; and inactivating the 2nd carrier if the 2nd carrier on which the control channel de-allocation is indicates is in an activated state.

Abstract: According to one embodiment, a communication device includes a first wireless device configured to transmit a signal and a second wireless device configured to transmit a positive acknowledge when reception of the signal is successful. In the first wireless device, a first controller controls a first transmission module to change a first frequency channel based on a change order stored in a first storage when the positive acknowledge is not received even after the time measured by a first timer exceeds a first period. In the second wireless device, a second controller controls a second reception module to change the first frequency channel based on the change order stored in a second storage when the positive acknowledge is not transmitted even after the time measured by a second timer exceeds the first period.

Abstract: Disclosed is an apparatus for switching MIMO modes, which can efficiently switch an MIMO mode of a mobile station. The apparatus for switching MIMO modes includes an MIMO mode determining unit, a staying time determining unit, and an MIMO mode switching unit. The MIMO mode determining unit determines a current MIMO mode of a mobile station. The staying time determining unit determines a first staying time in a first MIMO mode of the mobile station when the MIMO mode determining unit determines the current MIMO mode of the mobile station as the first MIMO mode for transmitting the same data through a plurality of antennas, and determines a second staying time in a second MIMO mode of the mobile station when the MIMO mode determining unit determines the current MIMO mode of the mobile station as the second MIMO mode for transmitting different data by antenna.

Abstract: A multivoice radio system allows users to speak and listen, at the same time, to others using multivoice radios without using a base station. Several embodiments of the present invention are directed toward combining a multivoice radio with push-to-talk (PTT), long-range radio. Other embodiments combine two or more multivoice systems and/or use an extender to increase a distance that multivoice radios can communicate with each other. Combining multivoice systems, in some embodiments, creates a voice and/or data mesh network. Switch-to-talk (STT) functionality can be added to systems to increase a number of users and promote radio discipline. Additionally, a combined in-ear microphone and speaker is disclosed. Further embodiments are directed to combining duplex radios, such as mobile phones, to multivoice systems, and/or PTT systems.

Abstract: A communication system is presented, which is capable of sending a transmission over an interface having at least two aggregated component carriers including a primary component carrier and at least one secondary component carrier, wherein the primary component carrier has a physical downlink control channel (PDCCH) associated therewith and wherein the PDCCH is capable of signaling allocations for the primary component carrier and the at least one secondary component carrier. A method of operating a network element including sending to a user equipment a transmission indication indicative of the transmission in the PDCCH of the primary component carrier. A method of operating a user equipment includes monitoring downlink control signaling for a transmission indication indicative of a transmission to the user equipment only on the PDCCH of the primary component carrier.

Abstract: A node in a wireless system using transmit/receive slots for a communication among the nodes in the wireless system comprises a reception block configured to receive from a transmitting node in the wireless system a synchronization signal, and to derive from the synchronization signal a time offset and a frequency offset between the clock generators in the node and in the transmitting node. Further, a slot synchronization block is provided including the clock generator which is updated based on the derived time offset and the derived frequency offset. Further, a transmission block is provided for transmitting data. The slot synchronization block sets a slot start of a slot based on the derived time offset and sets a slot of a subsequent slot based on the derived frequency offset.

Abstract: An apparatus comprising a home agent (HA) configured to couple to a mobile node (MN), a network address translation (NAT) server, and an Internet Protocol (IP) version four (IPv4) only host and to associate an IP version six (IPv6) address for an interface with the MN with an IPv4 address for an interface with the IPv4 only host in a NAT state table entry, wherein the NAT state table entry is used to translate an IPv6 packet associated with the MN to an IPv4 packet associated with the IPv4 only host.