Abstract: A system for transmitting/receiving resource allocation information in a wireless mobile communication system is provided. A transmission apparatus allocates a data burst in a frame, the data burst including a two-dimensional region of a time domain and a frequency domain, and transmits resource allocation information on the allocated data burst. A reception apparatus receives the resource allocation information from the transmission apparatus, and detects a region of the frame where the data burst is allocated, using the received resource allocation information. The resource allocation information includes information on a start point and an end point of the data burst. The start point indicates a point which is spaced apart from an start point of the frame by a first offset value in the time domain, and is spaced apart from the start point of the frame by a second offset value in the frequency domain.

Abstract: Provided are a dynamic resource allocation method based on frequency reuse partitioning for an Orthogonal Frequency Division Multiple Access (OFDMA) system, and a frame transmission method therefor. The dynamic resource allocation method includes: a) dividing a coverage into cells based on frequency reuse partitioning; b) selecting a candidate user to receive a channel allocated thereto based on the ratio; c) acquiring distance information for the candidate user; and d) checking whether the candidate user is in an inner or outer cell area based on the distance information. If the candidate user is in the inner cell area, a subchannel group among subchannel groups having a Frequency Reuse Factor (FRF) lower than a threshold value is selected and subcarriers of the selected subchannel group is allocated. If the candidate user is in the outer cell area, a subchannel group among subchannel groups having a FRF higher than the threshold value is selected.

Abstract: In one exemplary embodiment of the invention, a method including: determining whether first allocation information has been transmitted from a first device towards a second device in a wireless communication system; and transmitting a message including transmittal information and second allocation information from the first device towards the second device, wherein the transmittal information corresponds to the determined transmittal of the first allocation information. In another exemplary embodiment of the invention, a method including: detecting whether a first signal is received on a dedicated resource of a wireless communication system; detecting whether a second signal is received on a shared resource of the wireless communication system; and determining, based on a detection outcome for the first signal and a detection outcome for the second signal, whether at least one allocation has failed.

Abstract: A method and apparatus for receiving control information in a mobile communication system. A controller acquires information indicating variable Control Channel Elements (CCEs) allocated for first User Equipments (UEs) among CCEs constituting control channels, acquires information indicating fixed CCEs allocated for second UEs, selects the variable CCEs when a UE receiving the control information is included in the first UEs, and selects the fixed CCEs when the UE is included in the second UEs. A control information receiver receives the control information through the selected CCEs.

Abstract: A method and apparatus for handover in a wireless communication system and a system thereof, in which a Base Station (BS) allocates Scheduling Request/Channel Quality Information (SR/CQI) transmission resources to a Mobile Station (MS), an SR/CQI being periodically transmitted from the MS to a target cell, determines whether control information has been received from the MS using the allocated SR/CQI transmission resources, and allocates radio resources to the MS, for transmission of a handover confirm message from the MS, upon receipt of the control information from the MS.

Abstract: During handover, an origin base station saves data packets for a mobile station, as well as instructs the mobile station to switch communication to a destination base station, and requests a host station to switch the base station that communicates with that mobile station from the origin base station to the destination base station. After that, when in accordance to the switching request it is possible to save data packets, the host station begins to save the data packets for the mobile station in the place of the origin base station, and after communication between the mobile station and the destination base station has become possible, sends the saved data packets to the mobile station via the destination base station.

Abstract: A method and system generating signal to select a subset of antennas from a set of antennas to transmit user data in a wireless communication system. User data are transmitted during a first transmission time intervals (TTI) using a first subset of antennas. Pilot tones are transmitted during a second TTI using a second subset of antennas. Corresponding channels are estimated for the first subset of antennas and the second subset of antennas from the user data and the pilot tones. Then, based on the estimating, an optimal subset of antenna is selected from the first subset of antennas and the second subset of antennas to transmit the user data during a sequent TTI, and in which the selecting is performed adaptively.

Abstract: According to the teachings presented herein, wireless communication network interference is reduced by sending handover measurement information from mobile stations in conjunction with sending uplink scheduling requests, and by correspondingly making combined handover and uplink resource scheduling decisions. In this context, the combined decision considers both the handover measurement information and the uplink scheduling request, and determines whether a serving cell grants or denies the request and whether handover from the serving cell to a neighboring cell is or is not initiated for the mobile station. The combined determination provides for timely handover of the mobile station, such as where the mobile station is operating near a cell edge and issues an uplink scheduling request to its currently serving cell.

Abstract: here is provided a new multi-user receiver configuration technique which solves the problems of the user signal separation function of the multi-user receiver such as the interference canceller, decorrelator, and least square error detection. That is, there is provided a code-division multiplex signal decorrelation/identification method for realizing much more excellent performance than the aforementioned methods in the aspect of the power band amplitude product required for one-bit transfer as the evaluation reference of the CDMA method. A function for successively judging the best user is added to the conventional least square error detector MMSE-D shown by a dotted line in the block diagram of the successive detection type least square error detection method (SD-MMSE).

Abstract: The present invention provides a method and apparatus for localization of a mobile device in a distributed antenna communications system. In accordance with an embodiment of the invention, a distributed antenna system includes a plurality of distributed antennas that are communicatively coupled to a hub. A mobile communications device to be located is communicatively coupled to the hub via one or more of the antennas. The method for locating the mobile device comprises: receiving a message at the hub that identifies the mobile device to be located; discriminating among communications signals received from each of the distributed antennas using a channel and a spreading code to identify a signal from the mobile device; identifying messages from the mobile device to be located; and determining which of the antennas is closest to the mobile device to be located by monitoring received signal strength of the identified signal.

Abstract: A method for handling a random access procedure in a wireless communications system comprises a network dividing access resources of a random access channel into at least one group, a UE randomly choosing a group of the at least group when the UE performs random access preamble or dedicated preamble based procedures.

Abstract: The present invention relates to a ranging method using a bandwidth request code. For this purpose, the present invention provides a ranging method that includes transmitting a bandwidth request code for requesting a bandwidth for uplink traffic transmission from a radio access station, receiving a CDMA_Allocation_IE of a UL_MAP that includes uplink radio resource information from the radio access station, adjusting a transmission parameter according to an adjustment value included in the CDMA_Allocation_IE when periodic ranging performance is checked through the CDMA_Allocation_IE, checking whether the adjusted transmission parameter has an optimum value, and resetting a timer for periodic ranging, and a CDMA_Allocation_IE structure of a UL_MAP for the same.

Abstract: To provide a base station which makes it possible to apply HSDPA to radio bearers in the RLC-TM, such as circuit switched calls, as well and which can use the radio capacity to the full. A call controller 23 terminates control signals, such as NBAP and ALCAP, and exercises control on a scheduler 24, a ciphering function unit 21 and a radio modulator 22. The scheduler 24 conducts scheduling of time division in downlink user data transfer. The ciphering controller 21 executes ciphering on data scheduled in the scheduler 24 on the basis of ciphering control information supplied from the call controller 23, and transmits resultant data to the radio modulator 22. The radio modulator 22 conducts radio modulation, and transmits data to the mobile station.

Abstract: The invention concerns a method for scheduling of service data intended to be sent from a user terminal (UE1) over radio interfaces to a base station (BS1) by means of at least one control message sent from the base station (BS1) to the user terminal (UE1), whereby said at least one control message at least indicates or allows for a determination of a change of predefined transmission time intervals (TTI) in which the user terminal (UE1) shall send transport blocks comprising service data to the base station (BS1), a base station (BS1), a user terminal (UE1) and a communication network therefor.

Abstract: A method and an apparatus for scheduling in a mobile communication system. According to the method, for data/message pre-promised between a UE and a network node, the UE transmits a scheduling request at a predetermined timing. When the network node receives the scheduling request at the predetermined timing, the network node directly allocates a resource for transmission of the promised data/message by itself, so that the UE can instantly transmit the data/message. As a result, transmission delay can be reduced.

Abstract: A wireless communication network includes a network coordinator (NC) having plural channels and plural wireless transceivers, and plural nodes. Each node has status information, a number of channels and a number of wireless transceivers. Each node and the NC communicate in a Carrier Sense Multiple Access mode. Each node communicates the status information thereof to or toward the NC in a Time Division Multiple Access mode having plural time slots. The NC assigns the time slots and the channels to the nodes to provide a plurality of collision-free schedules therefor. The NC sends, for each node, a corresponding one of the collision-free schedules to or toward a corresponding one of the nodes. Each collision-free schedule includes a corresponding number of the time slots and a corresponding number of the channels that the corresponding one of the nodes employs to communicate the status information thereof to or toward the NC.

Abstract: Wireless networks and methods of use includes a source that transmits a signal to at least one destination during a scheduled time period. The network also includes at least one node, which is hidden from the destination, and which transmits a signal during the scheduled time period. The networks and their methods of use provide for efficient use of the medium.

Abstract: Methods, systems, and computer-readable media are provided for communicating via a mobile wireless communication device (MWCD). According to exemplary embodiments, a message is generated for a customer premises equipment located at a customer premises. The message is provided to the customer premises equipment via a mobile wireless communication device located at the customer premises.

Abstract: A broadband wireless communication system is provided. A sending apparatus in the broadband wireless communication system includes a controller for distributing packets to a plurality of processors to transmit the packets in a multi-Frequency Allocation (FA) access mode; the plurality of the processors for processing the packet provided from the controller in a Media Access Control (MAC) layer; and a plurality of senders for encoding the packets provided from the corresponding processors in a physical layer and transmitting a signal generated through the physical layer encoding.

Abstract: A mobile network solution provides secure and portable wireless networking service to mobile users with devices equipped with wireless network interfaces. The Secure Nomadic Wireless Network, or SNOWNET, follows a hierarchical approach. Special SNOWNET nodes are deployed in the area where networking service is needed and form a backbone network. At the same time, SNOWNET nodes provide local access service to regular mobile clients. SNOWNET provides security through authentication of the nodes and clients, as well as through encryption of the data.

Abstract: A first radio in a wireless network may request a transmit opportunity (TXOP) of a certain duration, with the duration being based a likelihood that a TXOP of that duration would cause interference with a co-located second radio. The duration may be dynamically adjusted based on the likelihood of such interference.

Abstract: When transmitting data from a transmission unit to a reception unit over a channel in a wireless communication system, it has been observed that there are inherent losses in throughput, especially for a channel experiencing high channel quality variations over its frequency range. To improve the throughput over such a channel, it is proposed to: estimate the quality of each subchannel of a channel, classify the subchannels into a number of quality groups based on the estimated quality, and select a code rate per quality group. This selected code rate per quality group is then used when a data word to be transmitted is coded. Simulations have shown that by grouping the subchannels into a limited number of groups, for example one to four groups depending on the channel quality variation, a high throughput could be achieved with a minimum of signaling cost in the form of extra overhead.

Abstract: Disclosed is a method and apparatus for scheduling multiple carriers to service multiple users in a multi-carrier wireless data network. A data transmission in a multi-carrier wireless data system can be scheduled in frames comprising one or more time slots. For each frame, each of multiple carriers in each time slot of the frame are assigned to one of multiple users. Various objective functions can be used to assign the carriers to the users based on a weight for each user and a channel rate of each carrier for each user while preventing excessive carriers from being assigned to a user.

Abstract: A method and apparatus for adaptively obtaining bandwidth requests in a broadband wireless communication system. The method and apparatus includes dynamically varying technique combinations enabling a plurality of users to efficiently request bandwidth from a shared base station. A user may “piggyback” a new bandwidth request upon, or set a “poll-me bit” within, presently allocated bandwidth. A base station may poll users, individually or in groups, by allocating unrequested bandwidth for new requests. Polling may respond to a “poll-me bit,” and/or it may be adaptively periodic at a rate based on communication status parameters, such as recent communication activity and connection QoS levels Group polling permits a possibility of collisions. Polling policies may be established for dynamically varying user groups, or may be determined for each user. Dynamic selection of appropriate polling techniques makes use of efficiency benefits associated with each technique.

Abstract: Provided is an apparatus and method for estimating an uplink frequency offset in a wireless communication system. In a receiving apparatus of a wireless communication system using a random access channel composed of two equivalent sequences, the apparatus includes a channel receiver which extracts samples corresponding to the two sequences from an input random access channel signal; a correlator which computes first and second correlation values by correlating preceding and trailing samples among the samples output from the channel receiver with a predetermined sequence; and a frequency offset estimator which estimates a frequency offset by using a ratio of the second correlation value to the first correlation value output from the correlator.

Abstract: In many aspects, the invention relates to systems and methods for synchronizing a communication network, particularly a slotted communication network, having a plurality of nodes. In slotted communication networks, the nodes are configured to transmit or receive data during selected time slots. During a selected time slot, each node transmits a synchronization message that is received by a neighboring node. The neighboring node adjusts its time slot boundary to coincide with the time of receipt of the synchronization message, thereby synchronizing each node with a neighboring node. Such systems and methods are energy efficient, accurate, fast, fault tolerant and easy to implement.

Abstract: A method for facilitating coexistence of wireless technologies competing for the same bandwidth includes, with a first component (14) residing in a first wireless network (20), initializing the first wireless network (20) with a superframe period (38) based on a superframe period (28) of a second wireless network (10) and communicating information over the first wireless network (20) within the Contention Free Period period (46) of the superframe period (38) of the first wireless network (20), and, with a second component (4) residing in the second wireless network (10), communicating information over the second wireless network (10) within the Contention Access Period (44) of the superframe period (38), the Contention Free Period (46) and the Contention Access Period (44) being distinct regions of the superframe period (38) of the first wireless network (20).

Abstract: A method, a system and an apparatus for synchronizing the stream between the bearer control layer and bearer layer devices. Bearer layer device returns information corresponding to the stream synchronizing information distributed by the resource manager RM of the bearer control layer back to the resource manager RM (101, 102); when the resource manager RM determines that there is information needed to be synchronized included in the information returned by bearer layer device (103), it compares the information with the one held by itself (105), and performs synchronization to the information within the bearer layer devices that need to be synchronized according to the result of the comparison.

Abstract: For a survivable portion of a network, a backup port for a first router of the survivable network, to reach a destination node in the event of a single node failure, may be determined by (a) accepting a routing path graph having the destination node, wherein the routing path graph includes one or more links terminated by one or more primary ports of the first router; and (b) for each router of at least a part of the routing path graph, (1) assuming that the current router is removed, defining (A) a first part of the routing path graph including the destination node, and (B) a second part of the routing path graph separated from the first part wherein the second part defines one or more sub-graphs, and (2) determining the backup port for the first router by examining at least one of the one or more sub-graphs to find a link to the first part of the routing path graph.

Abstract: In a method for providing a service between a service unit and terminal devices of at least one communication network, a synchronization unit evaluates the service provided by a service unit with respect to at least one technical requirement for use by at least one terminal device, establishes at least one rule for exchanging data of the service in accordance with the evaluation result, and stores the evaluation result. The synchronization unit forwards information regarding a registration for a service to at least one network unit of at least one communication network, with which a user of the terminal devices is registered. Upon inquiry by a terminal device for provision of the service through the service unit the synchronization unit exchanges the data via the synchronization unit in accordance with at least one established rule that depends on the technical requirements of the inquiring terminal device.

Abstract: Method, system and computer program product for transferring data in a data processing system network. A method for transferring data in a data processing system network according to the invention includes determining an adapter among a plurality of adapters that has the lowest transmit latency, and assigning data to be transferred to the adapter determined to have the lowest transmit latency. The data to be transferred is then transferred by the assigned adapter. The present invention utilizes network adapters to transfer data in a more efficient manner.

Abstract: The invention provides a modification to the operation of the intelligent network instruction set whereby on transmitting an Initiate Call Attempt message between the SCP 7 and an SSP 4 an instruction is included which forces the SSP 4 to send a response message whereby the identity assigned to the actions requested is known to the SCP 7 prior to the occurrence of a BCSM event at the SSP.

Abstract: During an incoming call, when a client apparatus of an incoming side notifies a client apparatus of an outgoing side of hold of the incoming call, the client apparatus notifies the client apparatus of the hold of the incoming call with OK message which is a response to an INVITE message.

Abstract: A method of distributing application server addresses in an IP Multimedia Subsystem. Upon allocation of an application server to a subscriber, the allocated or another application server sends at least one application server address to a Home Subscriber Server (HSS). The HSS stores the address(es) in association with the subscriber identity and sends the address(es) to a Serving Call/Session State Control Function (S-CSCF) allocated to the subscriber. The S-CSCF caches the address(es) in association with the subscriber identity and uses the address(es) to send subscriber-related messages to the allocated application server.

Abstract: A method of receiving at a terminal a first signal transmitted via a communication network, said method comprising the steps of; receiving at the terminal the first signal comprising a plurality of data elements; analysing characteristics of the first signal; receiving from a user of the terminal a second signal to be transmitted from the terminal; analysing characteristics of the second signal to detect audio activity in the second signal; and applying a delay between receiving at the terminal and outputting from the terminal at least one of said plurality of data elements; and adjusting the delay based on the analysed characteristics of the first signal and on the detection of audio activity in the second signal.

Abstract: The present invention provides a technique suitable for the case where three or more IP exchanges are multiplexed each other. Priorities are respectively given to a plurality of IP exchanges 1. Each IP exchange 1 autonomously changes its operating mode such that the IP exchange having the highest priority among operating IP exchange 1 operates in a operation system and the other IP exchange 1 operates in a standby system. Further, an IP terminal 2 logins to the IP exchange 1 having the highest priority among the operating IP exchange 1, and receives the IP telephone service from the IP exchange 1.

Abstract: According to one embodiment, a session initiation protocol trunk gateway apparatus includes a register which registers each connection ID of the plurality of terminals registered in a registration table into a registration server on the session initiation protocol network in accordance with a prescribed registration period, a connector which connects among the plurality of terminals and the session initiation protocol network, a processor which divides the registration period into a plurality of distribution intervals in response to the number of the connection IDs and executes registration processing of the next second connection IDs by spacing of the distribution interval from a registration start of a first connection ID, and a controller which executes registration processing of the corresponding-connection IDs into the registration server in preference to the processor based on prescribed conditions in processing by the processor.

Abstract: The IP-PBX includes a multimedia gateway controller in which a call control data master table stores call control data for all terminals falling under the control of the IP-PBX. In the event of failure of a PH accommodating IP phones and the like via the LAN, the multimedia gateway controller transfers the contents of the call control data slave table existing on the PH to the call control data slave table on another PH.

Abstract: A packet transmission system having existing null packets is provided. The system comprises a transmitter side transmitting information packets having null packets filled with redundancy information or parity check information; and a receiver side receiving the information packets and decoding the information packets using a predetermined decoding method; whereby the information packets are transmitted only once.

Abstract: A technique is disclosed that enables a set of information to be represented by data packets, where those data packets can then be distributed as needed throughout the telecommunications system that uses the data. The data packet of the illustrative embodiment is an autonomous encapsulation of data, a subsection of a data model at a certain time in relation to other data in the system at another time. The data packet is identified at a particular time and value with a globally unique identifier. Relationships of the data packet to other data packets are made known by using references to the other packets. As a result, referenced data packets are retrieved throughout the system based on their relationships to each other. Whenever a data packet is transmitted or received, each node involved in the transmission applies rules that determine where the data has to be transmitted to and what to do with the data when received.

Abstract: Packets received at a network element are filtered according to a plurality of filtering rules, where each filtering rule includes filtering data associated with one or more fields of a received packet. Rule groups are defined to include a plurality of filtering rules having common associated fields. For each rule group, global filter masks are generated, where bit positions in the global filter mask indicate whether each filtering rule in the rule group has a predetermined value at a corresponding bit position. As packets are received, comparing the global filter masks to one or more fields in the packets to determine whether there is a possibility that one of the rules in a corresponding rule group will match data in the fields.

Abstract: For efficient and fast admission control with respect to a new session and for exchange of data stream packets between an edge router (14) and a packet gateway (10) it is proposed to execute, at the edge router (14), selection of traffic streams of certain types from specific source nodes and target nodes and to also execute related traffic conditioning. Then, having selected specific data packet streams, the edge router (16) remarks data packets when the data packet streams are not in conformance with a predetermined traffic profile. This remarking serves as a performance indication for the packet gateway session admission control mechanism. In other words, the packet gateway (10) considers the number of remarked packets and determines on admission control for a new data packet stream session as a function of the number of remarked packets.

Abstract: According to one embodiment, an IP broadcast system includes a transmitting side and a receiving side connected to the transmitting side through a broadcast network on an IP network. The transmitting side includes a multiplexer which generates a standardized multiplex frame including at least a header field and an information field by multiplexing a plurality of RTP packets. The receiving side includes a buffer which temporarily holds the multiplex frame from the broadcast network and a program reproducer which retrieves and analyzes the multiplex frame from the buffer, extracts a reproduction clock shared by a plurality of programs, demultiplexes a plurality of TSs for each program from the multiplex frame, and based on the reproduction clock, reproduces the programs from each TS.

Abstract: An IP terminal apparatus has a SIP controller, a UDP packet controller, and an RTP controller. The SIP controller transmits and receives a call control message in order to establish a connection to and from a destination apparatus. The UDP packet controller transmits and receives media data with the destination apparatus in a media session after the connection was established. The RTP controller obtains source port number information of a media data packet that the UDP packet controller has received from the destination apparatus, and sets the obtained source port number as a destination port number for a packet to be transmitted to the destination apparatus. Thereby, a feasible range of NAT traversal can be improved in a simple and secure manner, even when at least one relay apparatuses employs symmetric NAT.

Abstract: An interval centroid-based watermark encoder encodes a watermark into a packet flow. Intervals are defined for the packet flow. Some of the intervals are selected as group A intervals while other intervals are selected as group B intervals. Group A and group B intervals are paired and assigned to watermark bits. A first or second value may be encoded by increasing the relative packet time between packets in either the group A (for the first bit value) or group B (for the second bit value) interval(s) of the interval pair(s) assigned to the watermark bits that are to represent the first or second bit value and the beginning of the same group interval(s). The relative packet times may be measured by a decoder and used to calculate a centroid difference for each interval pair. The centroid differences may be used to reconstruct the watermark.

Abstract: A method of communicating messages between endpoints in a data processing system includes coalescing two or more messages into a single packet and communicating the packet. Each of the messages can be associated with a different communication protocol. In addition, each of the messages can be targeted for communication to a different communication port. At the destination endpoint, the packet is de-coalesced, whereby each message is extracted from the packet and provided to the associated port. By coalescing multiple messages into a single packet, even where the messages are associated with different communication protocols or different communication ports, packets can be formed closer to an optimum size, thereby providing for more efficient communication between endpoints.

Abstract: The invention relates to a method for use in a packet-switched communication system, the method comprising: sending a first packet from a source node to a destination node, the first packet containing a first set of data bits; sending a second packet from the source node to the destination node, the second packet containing a second set of data bits; wherein, in the event that the first set of data bits cannot be successfully decoded in the destination node, the second packet further comprises a first set of error correction bits for the first set of data bits.

Abstract: A method for transporting data packets, a data network system and network nodes are provided. According to the present invention, subframes are classified according to their forwarding paths when entering a network from an ingress node; subframes with the same forwarding path are encapsulated into a multiframe; the multiframe is transportred via intermediate nodes; and the multiframe is de-encapsulated into the original subframes at an egress node. According to the present invention, traffic to enter the network is processed at an edge node of a network, so that small data packets (subframes) are encapsulated into a large data packet (multiframe) for increasing a minimum data packet length, and the subframes are recovered from the multiframe when the traffic exits the network for reducing the burden of traffic processing in a transport network.

Abstract: A first communication device managing a communication group of communication devices in a communication network is disclosed. The first communication device sends one or more data objects to the communication group and receives an affiliation request from a second communication device. The first communication device determines the one or more data objects that have not been received by a user of the second communication device and provides the data objects to the second communication device by establishing a communication session between the second communication device and the first communication device.

Abstract: When a user terminal makes a connection request, a router acquires a group address that the user terminal can join from an authentication server. The router gives information of the router to a packet during joining check (Query) and transmits the packet to a layer 2 switch. The layer 2 switch can grasp, by receiving the joining checks which group address the user terminal can join. The layer 2 switch can perform delivery control involving authentication. The layer 2 switch collects information necessary for accounting such as delivery start and end times and traffic and transmits the information to the router. The router creates accounting information on the basis of the information and transmits the accounting information to the accounting server.